version: 3.5.0

Signed-off-by: Sam Batschelet <sbatsche@redhat.com>

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,2 @@
+
+Please read https://etcd.io/docs/latest/reporting_bugs/

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -1,92 +0,0 @@
-name: Bug Report
-description: Report a bug encountered while operating Etcd
-labels:
-- area/bug
-body:
-- type: markdown
-  attributes:
-    value: |
-      Please read https://etcd.io/docs/latest/reporting_bugs/
-      If this matter is security related, please disclose it privately via security@etcd.io.
-      Please fill the form below and provide as much information as possible.
-      Not doing so may result in your bug not being addressed in a timely manner.
-
-- type: textarea
-  id: problem
-  attributes:
-    label: What happened?
-  validations:
-    required: true
-
-- type: textarea
-  id: expected
-  attributes:
-    label: What did you expect to happen?
-  validations:
-    required: true
-
-- type: textarea
-  id: repro
-  attributes:
-    label: How can we reproduce it (as minimally and precisely as possible)?
-  validations:
-    required: true
-
-- type: textarea
-  id: additional
-  attributes:
-    label: Anything else we need to know?
-
-- type: textarea
-  id: etcdVersion
-  attributes:
-    label: Etcd version (please run commands below)
-    value: |
-      <details>
-
-      ```console
-      $ etcd --version
-      # paste output here
-
-      $ etcdctl version
-      # paste output here
-      ```
-
-      </details>
-  validations:
-    required: true
-
-- type: textarea
-  id: config
-  attributes:
-    label: Etcd configuration (command line flags or environment variables)
-    value: |
-      <details>
-
-      # paste your configuration here
-
-      </details>
-
-- type: textarea
-  id: etcdDebugInformation
-  attributes:
-    label: Etcd debug information (please run commands blow, feel free to obfuscate the IP address or FQDN in the output)
-    value: |
-      <details>
-
-      ```console
-      $ etcdctl member list -w table
-      # paste output here
-
-      $ etcdctl --endpoints=<member list> endpoint status -w table
-      # paste output here
-      ```
-
-      </details>
-
-- type: textarea
-  id: logs
-  attributes:
-    label: Relevant log output
-    description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
-    render: shell

.github/workflows/build.yaml

@@ -1,60 +0,0 @@
-name: Build
-on: [push, pull_request]
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - linux-amd64
-          - linux-386
-          - darwin-amd64
-          - darwin-arm64
-          - windows-amd64
-          - linux-arm
-          - linux-arm64
-          - linux-ppc64le
-          - linux-s390x
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
-        with:
-          go-version: "1.17.6"
-      - env:
-          TARGET: ${{ matrix.target }}
-        run: |
-          echo "${TARGET}"
-          case "${TARGET}" in
-            linux-amd64)
-              ARCH=amd64 PASSES='build' ./scripts/test.sh
-              ;;
-            linux-386)
-              ARCH=386 PASSES='build' ./scripts/test.sh
-              ;;
-            darwin-amd64)
-              ARCH=amd64 GOOS=darwin GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            darwin-arm64)
-              ARCH=arm64 GOOS=darwin GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            windows-amd64)
-              ARCH=amd64 GOOS=windows GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            linux-arm)
-              ARCH=arm GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            linux-arm64)
-              ARCH=arm64 GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            linux-ppc64le)
-              ARCH=ppc64le GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            linux-s390x)
-              ARCH=s390x GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh
-              ;;
-            *)
-              echo "Failed to find target"
-              exit 1
-              ;;
-          esac

.github/workflows/contrib.yaml

@@ -1,11 +0,0 @@
-name: Test contrib/mixin
-on: [push, pull_request]
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
-      with:
-        go-version: "1.17.6"
-    - run: make -C contrib/mixin tools test

.github/workflows/coverage.yaml

@@ -1,28 +0,0 @@
-name: Coverage
-on: [push, pull_request]
-jobs:
-  coverage:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-        - linux-amd64-coverage
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
-      with:
-        go-version: "1.17.6"
-    - env:
-        TARGET: ${{ matrix.target }}
-      run: |
-        mkdir "${TARGET}"
-        case "${TARGET}" in
-          linux-amd64-coverage)
-            GOARCH=amd64 ./scripts/codecov_upload.sh
-            ;;
-          *)
-            echo "Failed to find target"
-            exit 1
-            ;;
-        esac

.github/workflows/e2e.yaml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: "1.17.6"
+        go-version: "^1.16"
     - run: date
     - env:
         TARGET: ${{ matrix.target }}
@@ -21,12 +21,12 @@ jobs:
         echo "${TARGET}"
         case "${TARGET}" in
           linux-amd64-e2e)
-            PASSES='build release e2e' MANUAL_VER=v3.5.0 CPU='4' EXPECT_DEBUG='true' COVER='false' RACE='true' ./scripts/test.sh 2>&1 | tee test.log
-            ! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
+            PASSES='build release e2e' MANUAL_VER=v3.4.7 CPU='4' EXPECT_DEBUG='true' COVER='false' RACE='true' ./test.sh 2>&1 | tee test.log
+            ! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
             ;;
           linux-386-e2e)
-            GOARCH=386 PASSES='build e2e' CPU='4' EXPECT_DEBUG='true' COVER='false' RACE='true' ./scripts/test.sh 2>&1 | tee test.log
-            ! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
+            GOARCH=386 PASSES='build e2e' CPU='4' EXPECT_DEBUG='true' COVER='false' RACE='true' ./test.sh 2>&1 | tee test.log
+            ! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
             ;;
           *)
             echo "Failed to find target"

.github/workflows/functional.yaml

@@ -12,7 +12,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: "1.17.6"
+        go-version: "^1.16"
     - run: date
     - env:
         TARGET: ${{ matrix.target }}
@@ -20,7 +20,7 @@ jobs:
         echo "${TARGET}"
         case "${TARGET}" in
           linux-amd64-functional)
-            GO_BUILD_FLAGS='-v -mod=readonly' ./scripts/build.sh && GOARCH=amd64 PASSES='functional' ./scripts/test.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' ./build && GOARCH=amd64 PASSES='functional' ./test
             ;;
           *)
             echo "Failed to find target"

.github/workflows/grpcproxy.yaml

@@ -7,26 +7,21 @@ jobs:
       fail-fast: true
       matrix:
         target:
-        - linux-amd64-grpcproxy-integration
-        - linux-amd64-grpcproxy-e2e
+        - linux-amd64-grpcproxy
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: "1.17.6"
+        go-version: "^1.16"
     - run: date
     - env:
         TARGET: ${{ matrix.target }}
       run: |
         echo "${TARGET}"
         case "${TARGET}" in
-          linux-amd64-grpcproxy-integration)
-            PASSES='build grpcproxy_integration'  CPU='4' COVER='false' RACE='true' ./scripts/test.sh 2>&1 | tee test.log
-            ! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
-            ;;
-          linux-amd64-grpcproxy-e2e)
-            PASSES='build grpcproxy_e2e'  CPU='4' COVER='false' RACE='true' ./scripts/test.sh 2>&1 | tee test.log
-            ! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
+          linux-amd64-grpcproxy)
+            PASSES='build grpcproxy'  CPU='4' COVER='false' RACE='true' ./test.sh 2>&1 | tee test.log
+            ! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test.log
             ;;
           *)
             echo "Failed to find target"

.github/workflows/self-hosted-linux-arm64-graviton2-tests.yml

@@ -0,0 +1,19 @@
+name: Linux ARM64 Graviton2
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: [self-hosted, linux, ARM64, graviton2]
+    steps:
+      - uses: actions/checkout@v2
+      - name: install dependencies
+        run: |
+          sudo amazon-linux-extras install epel
+          sudo yum install -y git gcc ShellCheck
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.16"
+      - run: go version
+      - run: date
+      - name: Run tests
+        run: TEST_OPTS="PASSES='fmt bom dep build unit integration_e2e'" make test

.github/workflows/self-hosted-linux-arm64-graviton2-tests.yml.md

@@ -0,0 +1,142 @@
+
+## Graviton-based self-hosted github action worker
+
+### Step 1. Create an EC2 instance with Graviton
+
+Create an AWS Graviton-based EC2 instance. For example,
+
+```
+# or download from https://github.com/aws/aws-k8s-tester/releases
+cd ${HOME}/go/src/github.com/aws/aws-k8s-tester
+go install -v ./cmd/ec2-utils
+
+# create arm64 AL2 instance
+AWS_K8S_TESTER_EC2_ON_FAILURE_DELETE=true \
+AWS_K8S_TESTER_EC2_LOG_COLOR=true \
+AWS_K8S_TESTER_EC2_REGION=us-west-2 \
+AWS_K8S_TESTER_EC2_S3_BUCKET_CREATE=true \
+AWS_K8S_TESTER_EC2_S3_BUCKET_CREATE_KEEP=true \
+AWS_K8S_TESTER_EC2_REMOTE_ACCESS_KEY_CREATE=true \
+AWS_K8S_TESTER_EC2_ASGS_FETCH_LOGS=false \
+AWS_K8S_TESTER_EC2_ASGS='{"GetRef.Name-arm64-al2-cpu":{"name":"GetRef.Name-arm64-al2-cpu","remote-access-user-name":"ec2-user","ami-type":"AL2_arm_64","image-id-ssm-parameter":"/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-arm64-gp2","instance-types":["m6g.xlarge"],"volume-size":40,"asg-min-size":1,"asg-max-size":1,"asg-desired-capacity":1}}' \
+AWS_K8S_TESTER_EC2_ROLE_CREATE=true \
+AWS_K8S_TESTER_EC2_VPC_CREATE=true \
+ec2-utils create instances --enable-prompt=true --auto-path
+```
+
+### Step 2. Install github action on the host
+
+SSH into the instance, and install the github action self-hosted runner (see [install scripts](https://github.com/etcd-io/etcd/settings/actions/runners/new?arch=arm64&os=linux)).
+
+### Step 3. Configure github action on the host
+
+SSH into the instance, and configure the github action self-hosted runner.
+
+First, we need disable ICU install (see [actions/runner issue on ARM64](https://github.com/actions/runner/issues/629)):
+
+```
+sudo yum install -y patch
+```
+
+And write this bash script:
+
+```
+#!/bin/bash -e
+
+patch -p1 <<ICU_PATCH
+diff -Naur a/bin/Runner.Listener.runtimeconfig.json b/bin/Runner.Listener.runtimeconfig.json
+--- a/bin/Runner.Listener.runtimeconfig.json	2020-07-01 02:21:09.000000000 +0000
++++ b/bin/Runner.Listener.runtimeconfig.json	2020-07-28 00:02:38.748868613 +0000
+@@ -8,7 +8,8 @@
+       }
+     ],
+     "configProperties": {
+-      "System.Runtime.TieredCompilation.QuickJit": true
++      "System.Runtime.TieredCompilation.QuickJit": true,
++      "System.Globalization.Invariant": true
+     }
+   }
+-}
+\ No newline at end of file
++}
+diff -Naur a/bin/Runner.PluginHost.runtimeconfig.json b/bin/Runner.PluginHost.runtimeconfig.json
+--- a/bin/Runner.PluginHost.runtimeconfig.json	2020-07-01 02:21:22.000000000 +0000
++++ b/bin/Runner.PluginHost.runtimeconfig.json	2020-07-28 00:02:59.358680003 +0000
+@@ -8,7 +8,8 @@
+       }
+     ],
+     "configProperties": {
+-      "System.Runtime.TieredCompilation.QuickJit": true
++      "System.Runtime.TieredCompilation.QuickJit": true,
++      "System.Globalization.Invariant": true
+     }
+   }
+-}
+\ No newline at end of file
++}
+diff -Naur a/bin/Runner.Worker.runtimeconfig.json b/bin/Runner.Worker.runtimeconfig.json
+--- a/bin/Runner.Worker.runtimeconfig.json	2020-07-01 02:21:16.000000000 +0000
++++ b/bin/Runner.Worker.runtimeconfig.json	2020-07-28 00:02:19.159028531 +0000
+@@ -8,7 +8,8 @@
+       }
+     ],
+     "configProperties": {
+-      "System.Runtime.TieredCompilation.QuickJit": true
++      "System.Runtime.TieredCompilation.QuickJit": true,
++      "System.Globalization.Invariant": true
+     }
+   }
+-}
+\ No newline at end of file
++}
+ICU_PATCH
+```
+
+And now patch the github action runner:
+
+```
+cd ${HOME}/actions-runner
+bash patch.sh
+```
+
+```
+patching file bin/Runner.Listener.runtimeconfig.json
+patching file bin/Runner.PluginHost.runtimeconfig.json
+patching file bin/Runner.Worker.runtimeconfig.json
+```
+
+And now configure:
+
+```
+sudo yum install -y wget
+INSTANCE_ID=$(wget -q -O - http://169.254.169.254/latest/meta-data/instance-id)
+echo ${INSTANCE_ID}
+
+# get token from https://github.com/etcd-io/etcd/settings/actions/runners/new?arch=arm64&os=linux
+cd ${HOME}/actions-runner
+./config.sh \
+--work "_work" \
+--name ${INSTANCE_ID} \
+--labels self-hosted,linux,ARM64,graviton2 \
+--url https://github.com/etcd-io/etcd \
+--token ...
+```
+
+And run:
+
+```
+# run this as a process in the terminal
+cd ${HOME}/actions-runner
+./run.sh
+
+# or run this as a systemd service
+cd ${HOME}/actions-runner
+sudo ./svc.sh install
+sudo ./svc.sh start
+sudo ./svc.sh status
+```
+
+### Step 4. Create github action configuration
+
+See https://github.com/etcd-io/etcd/pull/12928.
+

.github/workflows/static-analysis.yaml

@@ -1,29 +0,0 @@
-name: Static Analysis
-on: [push, pull_request]
-jobs:
-  run:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - linux-amd64-fmt
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-go@v2
-        with:
-          go-version: "1.17.6"
-      - run: date
-      - env:
-          TARGET: ${{ matrix.target }}
-        run: |
-          echo "${TARGET}"
-          case "${TARGET}" in
-            linux-amd64-fmt)
-              GOARCH=amd64 PASSES='fmt bom dep' ./scripts/test.sh
-              ;;
-            *)
-              echo "Failed to find target"
-              exit 1
-              ;;
-          esac

.github/workflows/tests.yaml

@@ -7,44 +7,54 @@ jobs:
       fail-fast: false
       matrix:
         target:
+        - linux-amd64-fmt
         - linux-amd64-integration-1-cpu
         - linux-amd64-integration-2-cpu
         - linux-amd64-integration-4-cpu
         - linux-amd64-unit-4-cpu-race
+        - all-build
         - linux-386-unit-1-cpu
     steps:
     - uses: actions/checkout@v2
     - uses: actions/setup-go@v2
       with:
-        go-version: "1.17.6"
+        go-version: "^1.16"
     - run: date
     - env:
         TARGET: ${{ matrix.target }}
       run: |
-        mkdir "${TARGET}"
-        export JUNIT_REPORT_DIR=$(realpath ${TARGET})
+        echo "${TARGET}"
         case "${TARGET}" in
+          linux-amd64-fmt)
+            GOARCH=amd64 PASSES='fmt bom dep' ./test.sh
+            ;;
           linux-amd64-integration-1-cpu)
-            GOARCH=amd64 CPU=1 PASSES='integration' RACE='false' ./scripts/test.sh
+            GOARCH=amd64 CPU=1 PASSES='integration' RACE='false' ./test.sh
             ;;
           linux-amd64-integration-2-cpu)
-            GOARCH=amd64 CPU=2 PASSES='integration' RACE='false' ./scripts/test.sh
+            GOARCH=amd64 CPU=2 PASSES='integration' RACE='false' ./test.sh
             ;;
           linux-amd64-integration-4-cpu)
-            GOARCH=amd64 CPU=4 PASSES='integration' RACE='false' ./scripts/test.sh
+            GOARCH=amd64 CPU=4 PASSES='integration' RACE='false' ./test.sh
             ;;
           linux-amd64-unit-4-cpu-race)
-            GOARCH=amd64 PASSES='unit' RACE='true' CPU='4' ./scripts/test.sh -p=2
+            GOARCH=amd64 PASSES='unit' RACE='true' CPU='4' ./test.sh -p=2
+            ;;
+          all-build)
+            GOARCH=amd64 PASSES='build' ./test.sh
+            GOARCH=386 PASSES='build' ./test.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOOS=darwin GOARCH=amd64 ./build.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOOS=windows GOARCH=amd64 ./build.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOARCH=arm ./build.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOARCH=arm64 ./build.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOARCH=ppc64le ./build.sh
+            GO_BUILD_FLAGS='-v -mod=readonly' GOARCH=s390x ./build.sh
             ;;
           linux-386-unit-1-cpu)
-            GOARCH=386 PASSES='unit' RACE='false' CPU='1' ./scripts/test.sh -p=4
+            GOARCH=386 PASSES='unit' RACE='false' CPU='1' ./test -p=4
             ;;
           *)
             echo "Failed to find target"
             exit 1
             ;;
         esac
-    - uses: actions/upload-artifact@v2
-      if: always()
-      with:
-        path: ./**/junit_*.xml

.gitignore

@@ -14,7 +14,6 @@
 *.test
 hack/tls-setup/certs
 .idea
-/contrib/mixin/manifests
 /contrib/raftexample/raftexample
 /contrib/raftexample/raftexample-*
 /vendor
@@ -22,5 +21,3 @@ hack/tls-setup/certs
 *.tmp
 *.bak
 .gobincache/
-/Documentation/dev-guide/api_reference_v3.md
-/Documentation/dev-guide/api_concurrency_reference_v3.md

.travis.yml

@@ -0,0 +1,51 @@
+language: go
+go_import_path: go.etcd.io/etcd/v3
+
+sudo: required
+
+services: docker
+
+go:
+  - "1.16.3"
+  - tip
+
+notifications:
+  on_success: never
+  on_failure: never
+
+env:
+  matrix:
+    - TARGET=linux-amd64-coverage
+    - TARGET=linux-amd64-fmt-unit-go-tip-2-cpu
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - go: "1.16.3"
+      env: TARGET=linux-amd64-coverage
+    - go: tip
+      env: TARGET=linux-amd64-fmt-unit-go-tip-2-cpu
+  exclude:
+    - go: tip
+      env: TARGET=linux-amd64-coverage
+    - go: "1.16.3"
+      env: TARGET=linux-amd64-fmt-unit-go-tip-2-cpu
+
+before_install:
+  - if [[ $TRAVIS_GO_VERSION == 1.* ]]; then docker pull gcr.io/etcd-development/etcd-test:go${TRAVIS_GO_VERSION}; fi
+
+install:
+  - date
+
+script:
+  - date
+  - echo "TRAVIS_GO_VERSION=${TRAVIS_GO_VERSION}"
+  - >
+    case "${TARGET}" in
+      linux-amd64-coverage)
+        sudo HOST_TMP_DIR=/tmp TEST_OPTS="VERBOSE='1'" make docker-test-coverage
+        ;;
+      linux-amd64-fmt-unit-go-tip-2-cpu)
+        GOARCH=amd64 PASSES='fmt unit' CPU='2' RACE='false' ./test.sh -p=2
+        ;;
+    esac

.words

@@ -0,0 +1,116 @@
+accessors
+addrConns
+args
+atomics
+backoff
+BackoffFunc
+BackoffLinearWithJitter
+Balancer
+BidiStreams
+blackhole
+blackholed
+CallOptions
+cancelable
+cancelation
+ccBalancerWrapper
+clientURLs
+clusterName
+cluster_proxy
+consistentIndex
+ConsistentIndexGetter
+DefaultMaxRequestBytes
+defragment
+defragmenting
+deleter
+dev
+/dev/null
+dev/null
+DNS
+errClientDisconnected
+ErrCodeEnhanceYourCalm
+ErrConnClosing
+ErrRequestTooLarge
+ErrTimeout
+etcd
+FIXME
+github
+GoAway
+goroutine
+goroutines
+gRPC
+grpcAddr
+hasleader
+healthcheck
+hostname
+iff
+inflight
+InfoLevel
+jitter
+jitter
+jitter
+keepalive
+Keepalive
+KeepAlive
+keepalives
+keyspace
+lexically
+lexicographically
+linearizable
+linearization
+linearized
+liveness
+localhost
+__lostleader
+MaxRequestBytes
+MiB
+middleware
+mutators
+mutex
+nils
+nondeterministically
+nop
+OutputWALDir
+parsedTarget
+passthrough
+PermitWithoutStream
+prefetching
+prometheus
+protobuf
+racey
+rafthttp
+rebalanced
+reconnection
+repin
+ResourceExhausted
+retriable
+retriable
+rpc
+RPC
+RPCs
+saveWALAndSnap
+serializable
+ServerStreams
+SHA
+SRV
+statusError
+subConn
+subconns
+SubConns
+teardown
+TestBalancerDoNotBlockOnClose
+todo
+too_many_pings
+transactional
+transferee
+transientFailure
+unbuffered
+uncontended
+unfreed
+unlisting
+unprefixed
+WatchProgressNotifyInterval
+WAL
+WithBackoff
+WithDialer
+WithMax
+WithRequireLeader

ADOPTERS.md

@@ -1,250 +0,0 @@
----
-title: Production users
----
-
-This document tracks people and use cases for etcd in production. By creating a list of production use cases we hope to build a community of advisors that we can reach out to with experience using various etcd applications, operation environments, and cluster sizes. The etcd development team may reach out periodically to check-in on how etcd is working in the field and update this list.
-
-## All Kubernetes Users
-
-- *Application*: https://kubernetes.io/
-- *Environments*: AWS, OpenStack, Azure, Google Cloud, Huawei Cloud, Bare Metal, etc
-
-**This is a meta user; please feel free to document specific Kubernetes clusters!**
-
-All Kubernetes clusters use etcd as their primary data store. This means etcd's users include such companies as [Niantic, Inc Pokemon Go](https://cloudplatform.googleblog.com/2016/09/bringing-Pokemon-GO-to-life-on-Google-Cloud.html), [Box](https://blog.box.com/blog/kubernetes-box-microservices-maximum-velocity/), [CoreOS](https://coreos.com/tectonic), [Ticketmaster](https://www.youtube.com/watch?v=wqXVKneP0Hg), [Salesforce](https://www.salesforce.com) and many many more.
-
-## discovery.etcd.io
-
-- *Application*: https://github.com/coreos/discovery.etcd.io
-- *Launched*: Feb. 2014
-- *Cluster Size*: 5 members, 5 discovery proxies
-- *Order of Data Size*: 100s of Megabytes
-- *Operator*: CoreOS, brandon.philips@coreos.com
-- *Environment*: AWS
-- *Backups*: Periodic async to S3
-
-discovery.etcd.io is the longest continuously running etcd backed service that we know about. It is the basis of automatic cluster bootstrap and was launched in Feb. 2014: https://coreos.com/blog/etcd-0.3.0-released/.
-
-## OpenTable
-
-- *Application*: OpenTable internal service discovery and cluster configuration management
-- *Launched*: May 2014
-- *Cluster Size*: 3 members each in 6 independent clusters; approximately 50 nodes reading / writing
-- *Order of Data Size*: 10s of MB
-- *Operator*: OpenTable, Inc; sschlansker@opentable.com
-- *Environment*: AWS, VMWare
-- *Backups*: None, all data can be re-created if necessary.
-
-## cycoresys.com
-
-- *Application*: multiple
-- *Launched*: Jul. 2014
-- *Cluster Size*: 3 members, _n_ proxies
-- *Order of Data Size*: 100s of kilobytes
-- *Operator*: CyCore Systems, Inc, sys@cycoresys.com
-- *Environment*: Baremetal
-- *Backups*: Periodic sync to Ceph RadosGW and DigitalOcean VM
-
-CyCore Systems provides architecture and engineering for computing systems.  This cluster provides microservices, virtual machines, databases, storage clusters to a number of clients.  It is built on CoreOS machines, with each machine in the cluster running etcd as a peer or proxy.
-
-## Radius Intelligence
-
-- *Application*: multiple internal tools, Kubernetes clusters, bootstrappable system configs
-- *Launched*: June 2015
-- *Cluster Size*: 2 clusters of 5 and 3 members; approximately a dozen nodes read/write
-- *Order of Data Size*: 100s of kilobytes
-- *Operator*: Radius Intelligence; jcderr@radius.com
-- *Environment*: AWS, CoreOS, Kubernetes
-- *Backups*: None, all data can be recreated if necessary.
-
-Radius Intelligence uses Kubernetes running CoreOS to containerize and scale internal toolsets. Examples include running [JetBrains TeamCity][teamcity] and internal AWS security and cost reporting tools. etcd clusters back these clusters as well as provide some basic environment bootstrapping configuration keys.
-
-## Vonage
-
-- *Application*: kubernetes, vault backend, system configuration for microservices, scheduling, locks (future - service discovery)
-- *Launched*: August 2015
-- *Cluster Size*: 2 clusters of 5 members in 2 DCs, n local proxies 1-to-1 with microservice, (ssl and SRV look up)
-- *Order of Data Size*: kilobytes
-- *Operator*: Vonage [devAdmin][raoofm]
-- *Environment*: VMWare, AWS
-- *Backups*: Daily snapshots on VMs. Backups done for upgrades.
-
-## PD
-
-- *Application*: embed etcd
-- *Launched*: Mar 2016
-- *Cluster Size*: 3 or 5 members
-- *Order of Data Size*: megabytes
-- *Operator*: PingCAP, Inc.
-- *Environment*: Bare Metal, AWS, etc.
-- *Backups*: None.
-
-PD(Placement Driver) is the central controller in the TiDB cluster. It saves the cluster meta information, schedule the data, allocate the global unique timestamp for the distributed transaction, etc. It embeds etcd to supply high availability and auto failover.
-
-## Huawei
-
-- *Application*: System configuration for overlay network (Canal)
-- *Launched*: June 2016
-- *Cluster Size*: 3 members for each cluster
-- *Order of Data Size*: kilobytes
-- *Operator*: Huawei Euler Department
-- *Environment*: [Huawei Cloud](http://www.hwclouds.com/product/cce.html)
-- *Backups*: None, all data can be recreated if necessary.
-
-[teamcity]: https://www.jetbrains.com/teamcity/
-[raoofm]:https://github.com/raoofm
-
-## Qiniu Cloud
-
-- *Application*: system configuration for microservices, distributed locks
-- *Launched*: Jan. 2016
-- *Cluster Size*: 3 members each with several clusters
-- *Order of Data Size*: kilobytes
-- *Operator*: Pandora, chenchao@qiniu.com
-- *Environment*: Baremetal
-- *Backups*: None, all data can be recreated if necessary
-
-## QingCloud
-
-- *Application*: [QingCloud][qingcloud] appcenter cluster for service discovery as [metad][metad] backend.
-- *Launched*: December 2016
-- *Cluster Size*: 1 cluster of 3 members per user.
-- *Order of Data Size*: kilobytes
-- *Operator*: [yunify][yunify]
-- *Environment*: QingCloud IaaS
-- *Backups*: None, all data can be recreated if necessary.
-
-[metad]:https://github.com/yunify/metad
-[yunify]:https://github.com/yunify
-[qingcloud]:https://qingcloud.com/
-
-
-## Yandex
-
-- *Application*: system configuration for services, service discovery
-- *Launched*: March 2016
-- *Cluster Size*: 3 clusters of 5 members
-- *Order of Data Size*: several gigabytes
-- *Operator*: Yandex; [nekto0n][nekto0n]
-- *Environment*: Bare Metal
-- *Backups*: None
-
-[nekto0n]:https://github.com/nekto0n
-
-## Tencent Games
-
-- *Application*: Meta data and configuration data for service discovery, Kubernetes, etc.
-- *Launched*: Jan. 2015
-- *Cluster Size*: 3 members each with 10s of clusters
-- *Order of Data Size*: 10s of Megabytes
-- *Operator*: Tencent Game Operations Department
-- *Environment*: Baremetal
-- *Backups*: Periodic sync to backup server
-
-In Tencent games, we use Docker and Kubernetes to deploy and run our applications, and use etcd to save meta data for service discovery, Kubernetes, etc.
-
-## Hyper.sh
-
-- *Application*: Kubernetes, distributed locks, etc.
-- *Launched*: April 2016
-- *Cluster Size*: 1 cluster of 3 members
-- *Order of Data Size*: 10s of MB
-- *Operator*: Hyper.sh
-- *Environment*: Baremetal
-- *Backups*: None, all data can be recreated if necessary.
-
-In [hyper.sh][hyper.sh], the container service is backed by [hypernetes][hypernetes], a multi-tenant kubernetes distro. Moreover, we use etcd to coordinate the multiple manage services and store global meta data.
-
-[hypernetes]:https://github.com/hyperhq/hypernetes
-[Hyper.sh]:https://www.hyper.sh
-
-## Meitu
-- *Application*: system configuration for services, service discovery, kubernetes in test environment
-- *Launched*: October 2015
-- *Cluster Size*: 1 cluster of 3 members
-- *Order of Data Size*: megabytes
-- *Operator*: Meitu, hxj@meitu.com, [shafreeck][shafreeck]
-- *Environment*: Bare Metal
-- *Backups*: None, all data can be recreated if necessary.
-
-[shafreeck]:https://github.com/shafreeck
-
-## Grab
-- *Application*: system configuration for services, service discovery
-- *Launched*: June 2016
-- *Cluster Size*: 1 cluster of 7 members
-- *Order of Data Size*: megabytes
-- *Operator*: Grab, [taxitan][taxitan], [reterVision][reterVision]
-- *Environment*: AWS
-- *Backups*: None, all data can be recreated if necessary.
-
-[taxitan]:https://github.com/taxitan
-[reterVision]:https://github.com/reterVision
-
-## DaoCloud.io
-
-- *Application*: container management
-- *Launched*: Sep. 2015
-- *Cluster Size*: 1000+ deployments, each deployment contains a 3 node cluster.
-- *Order of Data Size*: 100s of Megabytes
-- *Operator*: daocloud.io
-- *Environment*: Baremetal and virtual machines
-- *Backups*: None, all data can be recreated if necessary.
-
-In [DaoCloud][DaoCloud], we use Docker and Swarm to deploy and run our applications, and we use etcd to save metadata for service discovery.
-
-[DaoCloud]:https://www.daocloud.io
-
-## Branch.io
-
-- *Application*: Kubernetes
-- *Launched*: April 2016
-- *Cluster Size*: Multiple clusters, multiple sizes
-- *Order of Data Size*: 100s of Megabytes
-- *Operator*: branch.io
-- *Environment*: AWS, Kubernetes
-- *Backups*: EBS volume backups
-
-At [Branch][branch], we use kubernetes heavily as our core microservice platform for staging and production.
-
-[branch]: https://branch.io
-
-## Baidu Waimai
-
-- *Application*: SkyDNS, Kubernetes, UDC, CMDB and other distributed systems
-- *Launched*: April. 2016
-- *Cluster Size*: 3 clusters of 5 members
-- *Order of Data Size*: several gigabytes
-- *Operator*: Baidu Waimai Operations Department
-- *Environment*: CentOS 6.5
-- *Backups*: backup scripts
-
-## Salesforce.com
-
-- *Application*: Kubernetes
-- *Launched*: Jan 2017
-- *Cluster Size*: Multiple clusters of 3 members
-- *Order of Data Size*: 100s of Megabytes
-- *Operator*: Salesforce.com (krmayankk@github)
-- *Environment*: BareMetal
-- *Backups*: None, all data can be recreated
-
-## Hosted Graphite
-
-- *Application*: Service discovery, locking, ephemeral application data
-- *Launched*: January 2017
-- *Cluster Size*: 2 clusters of 7 members
-- *Order of Data Size*: Megabytes
-- *Operator*: Hosted Graphite (sre@hostedgraphite.com)
-- *Environment*: Bare Metal
-- *Backups*: None, all data is considered ephemeral.
-
-## Transwarp
-
-- *Application*: Transwarp Data Cloud, Transwarp Operating System, Transwarp Data Hub, Sophon
-- *Launched*: January 2016
-- *Cluster Size*: Multiple clusters, multiple sizes
-- *Order of Data Size*: Megabytes
-- *Operator*: Trasnwarp Operating System
-- *Environment*: Bare Metal, Container
-- *Backups*: backup scripts

CHANGELOG/CHANGELOG-2.3.md

@@ -1,16 +0,0 @@
-
-
-<hr>
-
-
-## [v2.3.8](https://github.com/etcd-io/etcd/releases/tag/v2.3.8) (2017-02-17)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v2.3.7...v2.3.8).
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-

CHANGELOG/CHANGELOG-3.0.md

@@ -1,291 +0,0 @@
-
-
-<hr>
-
-
-## [v3.0.16](https://github.com/etcd-io/etcd/releases/tag/v3.0.16) (2016-11-13)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.15...v3.0.16) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.4*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.15](https://github.com/etcd-io/etcd/releases/tag/v3.0.15) (2016-11-11)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.14...v3.0.15) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Fixed
-
-- Fix cancel watch request with wrong range end.
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.14](https://github.com/etcd-io/etcd/releases/tag/v3.0.14) (2016-11-04)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.13...v3.0.14) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Added
-
-- v3 `etcdctl migrate` command now supports `--no-ttl` flag to discard keys on transform.
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.13](https://github.com/etcd-io/etcd/releases/tag/v3.0.13) (2016-10-24)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.12...v3.0.13) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.12](https://github.com/etcd-io/etcd/releases/tag/v3.0.12) (2016-10-07)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.11...v3.0.12) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.11](https://github.com/etcd-io/etcd/releases/tag/v3.0.11) (2016-10-07)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.10...v3.0.11) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Added
-
-- Server returns previous key-value (optional)
-  - `clientv3.WithPrevKV` option
-  - v3 etcdctl `put,watch,del --prev-kv` flag
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.10](https://github.com/etcd-io/etcd/releases/tag/v3.0.10) (2016-09-23)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.9...v3.0.10) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.9](https://github.com/etcd-io/etcd/releases/tag/v3.0.9) (2016-09-15)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.8...v3.0.9) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Added
-
-- Warn on domain names on listen URLs (v3.2 will reject domain names).
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.8](https://github.com/etcd-io/etcd/releases/tag/v3.0.8) (2016-09-09)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.7...v3.0.8) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Other
-
-- Allow only IP addresses in listen URLs (domain names are rejected).
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.7](https://github.com/etcd-io/etcd/releases/tag/v3.0.7) (2016-08-31)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.6...v3.0.7) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Other
-
-- SRV records only allow A records (RFC 2052).
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.6](https://github.com/etcd-io/etcd/releases/tag/v3.0.6) (2016-08-19)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.5...v3.0.6) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.5](https://github.com/etcd-io/etcd/releases/tag/v3.0.5) (2016-08-19)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.4...v3.0.5) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Other
-
-- SRV records (e.g., infra1.example.com) must match the discovery domain (i.e., example.com) if no custom certificate authority is given.
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.4](https://github.com/etcd-io/etcd/releases/tag/v3.0.4) (2016-07-27)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.3...v3.0.4) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Added
-
-- v2 `etcdctl ls` command now supports `--output=json`.
-- Add /var/lib/etcd directory to etcd official Docker image.
-
-### Other
-
-- v2 auth can now use common name from TLS certificate when `--client-cert-auth` is enabled.
-
-### Go
-
-- Compile with [*Go 1.6.3*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.3](https://github.com/etcd-io/etcd/releases/tag/v3.0.3) (2016-07-15)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.2...v3.0.3) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Other
-
-- Revert Dockerfile to use `CMD`, instead of `ENTRYPOINT`, to support `etcdctl` run.
-  - Docker commands for v3.0.2 won't work without specifying executable binary paths.
-- v3 etcdctl default endpoints are now `127.0.0.1:2379`.
-
-### Go
-
-- Compile with [*Go 1.6.2*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.2](https://github.com/etcd-io/etcd/releases/tag/v3.0.2) (2016-07-08)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.1...v3.0.2) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Other
-
-- Dockerfile uses `ENTRYPOINT`, instead of `CMD`, to run etcd without binary path specified.
-
-### Go
-
-- Compile with [*Go 1.6.2*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.1](https://github.com/etcd-io/etcd/releases/tag/v3.0.1) (2016-07-01)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.0...v3.0.1) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.2*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-
-
-## [v3.0.0](https://github.com/etcd-io/etcd/releases/tag/v3.0.0) (2016-06-30)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v2.3.0...v3.0.0) and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_0/).**
-
-### Go
-
-- Compile with [*Go 1.6.2*](https://golang.org/doc/devel/release.html#go1.6).
-
-
-<hr>
-

CHANGELOG/CHANGELOG-3.1.md

@@ -1,578 +0,0 @@
-
-
-Previous change logs can be found at [CHANGELOG-3.0](https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.0.md).
-
-
-The minimum recommended etcd versions to run in **production** are 3.3.18+, 3.4.2+, and 3.5.2+.
-
-
-<hr>
-
-## [v3.1.21](https://github.com/etcd-io/etcd/releases/tag/v3.1.21) (2019-TBD)
-
-### etcdctl v3
-
-- [Strip out insecure endpoints from DNS SRV records when using discovery](https://github.com/etcd-io/etcd/pull/10443) with etcdctl v2
-- Add [`etcdctl endpoint health --write-out` support](https://github.com/etcd-io/etcd/pull/9540).
-  - Previously, [`etcdctl endpoint health --write-out json` did not work](https://github.com/etcd-io/etcd/issues/9532).
-  - The command output is changed. Previously, if endpoint is unreachable, the command output is
-  "\<endpoint\> is unhealthy: failed to connect: \<error message\>". This change unified the error message, all error types
-  now have the same output "\<endpoint\> is unhealthy: failed to commit proposal: \<error message\>".
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Fix bug where [db_compaction_total_duration_milliseconds metric incorrectly measured duration as 0](https://github.com/etcd-io/etcd/pull/10646).
-
-<hr>
-
-## [v3.1.20](https://github.com/etcd-io/etcd/releases/tag/v3.1.20) (2018-10-10)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.19...v3.1.20) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Improved
-
-- Improve ["became inactive" warning log](https://github.com/etcd-io/etcd/pull/10024), which indicates message send to a peer failed.
-- Improve [read index wait timeout warning log](https://github.com/etcd-io/etcd/pull/10026), which indicates that local node might have slow network.
-- Add [gRPC interceptor for debugging logs](https://github.com/etcd-io/etcd/pull/9990); enable `etcd --debug` flag to see per-request debug information.
-- Add [consistency check in snapshot status](https://github.com/etcd-io/etcd/pull/10109). If consistency check on snapshot file fails, `snapshot status` returns `"snapshot file integrity check failed..."` error.
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Improve [`etcd_network_peer_round_trip_time_seconds`](https://github.com/etcd-io/etcd/pull/10155) Prometheus metric to track leader heartbeats.
-  - Previously, it only samples the TCP connection for snapshot messages.
-- Display all registered [gRPC metrics at start](https://github.com/etcd-io/etcd/pull/10034).
-- Add [`etcd_snap_db_fsync_duration_seconds_count`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_snap_db_save_total_duration_seconds_bucket`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_send_success`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_send_failures`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_send_total_duration_seconds`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_receive_success`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_receive_failures`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_network_snapshot_receive_total_duration_seconds`](https://github.com/etcd-io/etcd/pull/9997) Prometheus metric.
-- Add [`etcd_server_id`](https://github.com/etcd-io/etcd/pull/9998) Prometheus metric.
-- Add [`etcd_server_health_success`](https://github.com/etcd-io/etcd/pull/10156) Prometheus metric.
-- Add [`etcd_server_health_failures`](https://github.com/etcd-io/etcd/pull/10156) Prometheus metric.
-- Add [`etcd_server_read_indexes_failed_total`](https://github.com/etcd-io/etcd/pull/10094) Prometheus metric.
-
-### client v3
-
-- Fix logic on [release lock key if cancelled](https://github.com/etcd-io/etcd/pull/10153) in `clientv3/concurrency` package.
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.19](https://github.com/etcd-io/etcd/releases/tag/v3.1.19) (2018-07-24)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.18...v3.1.19) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Improved
-
-- Improve [Raft Read Index timeout warning messages](https://github.com/etcd-io/etcd/pull/9897).
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Add [`etcd_server_go_version`](https://github.com/etcd-io/etcd/pull/9957) Prometheus metric.
-- Add [`etcd_server_slow_read_indexes_total`](https://github.com/etcd-io/etcd/pull/9897) Prometheus metric.
-- Add [`etcd_server_quota_backend_bytes`](https://github.com/etcd-io/etcd/pull/9820) Prometheus metric.
-  - Use it with `etcd_mvcc_db_total_size_in_bytes` and `etcd_mvcc_db_total_size_in_use_in_bytes`.
-  - `etcd_server_quota_backend_bytes 2.147483648e+09` means current quota size is 2 GB.
-  - `etcd_mvcc_db_total_size_in_bytes 20480` means current physically allocated DB size is 20 KB.
-  - `etcd_mvcc_db_total_size_in_use_in_bytes 16384` means future DB size if defragment operation is complete.
-  - `etcd_mvcc_db_total_size_in_bytes - etcd_mvcc_db_total_size_in_use_in_bytes` is the number of bytes that can be saved on disk with defragment operation.
-- Add [`etcd_mvcc_db_total_size_in_bytes`](https://github.com/etcd-io/etcd/pull/9819) Prometheus metric.
-  - In addition to [`etcd_debugging_mvcc_db_total_size_in_bytes`](https://github.com/etcd-io/etcd/pull/9819).
-- Add [`etcd_mvcc_db_total_size_in_use_in_bytes`](https://github.com/etcd-io/etcd/pull/9256) Prometheus metric.
-  - Use it with `etcd_mvcc_db_total_size_in_bytes` and `etcd_mvcc_db_total_size_in_use_in_bytes`.
-  - `etcd_server_quota_backend_bytes 2.147483648e+09` means current quota size is 2 GB.
-  - `etcd_mvcc_db_total_size_in_bytes 20480` means current physically allocated DB size is 20 KB.
-  - `etcd_mvcc_db_total_size_in_use_in_bytes 16384` means future DB size if defragment operation is complete.
-  - `etcd_mvcc_db_total_size_in_bytes - etcd_mvcc_db_total_size_in_use_in_bytes` is the number of bytes that can be saved on disk with defragment operation.
-
-### client v3
-
-- Fix [lease keepalive interval updates when response queue is full](https://github.com/etcd-io/etcd/pull/9952).
-  - If `<-chan *clientv3LeaseKeepAliveResponse` from `clientv3.Lease.KeepAlive` was never consumed or channel is full, client was [sending keepalive request every 500ms](https://github.com/etcd-io/etcd/issues/9911) instead of expected rate of every "TTL / 3" duration.
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.18](https://github.com/etcd-io/etcd/releases/tag/v3.1.18) (2018-06-15)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.17...v3.1.18) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Add [`etcd_server_version`](https://github.com/etcd-io/etcd/pull/8960) Prometheus metric.
-  - To replace [Kubernetes `etcd-version-monitor`](https://github.com/etcd-io/etcd/issues/8948).
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.17](https://github.com/etcd-io/etcd/releases/tag/v3.1.17) (2018-06-06)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.16...v3.1.17) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Fix [v3 snapshot recovery](https://github.com/etcd-io/etcd/issues/7628).
-  - A follower receives a leader snapshot to be persisted as a `[SNAPSHOT-INDEX].snap.db` file on disk.
-  - Now, server [ensures that the incoming snapshot be persisted on disk before loading it](https://github.com/etcd-io/etcd/pull/7876).
-  - Otherwise, index mismatch happens and triggers server-side panic (e.g. newer WAL entry with outdated snapshot index).
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.16](https://github.com/etcd-io/etcd/releases/tag/v3.1.16) (2018-05-31)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.15...v3.1.16) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Fix [`mvcc` server panic from restore operation](https://github.com/etcd-io/etcd/pull/9775).
-  - Let's assume that a watcher had been requested with a future revision X and sent to node A that became network-partitioned thereafter. Meanwhile, cluster makes progress. Then when the partition gets removed, the leader sends a snapshot to node A. Previously if the snapshot's latest revision is still lower than the watch revision X,  **etcd server panicked** during snapshot restore operation.
-  - Now, this server-side panic has been fixed.
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.15](https://github.com/etcd-io/etcd/releases/tag/v3.1.15) (2018-05-09)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.14...v3.1.15) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Purge old [`*.snap.db` snapshot files](https://github.com/etcd-io/etcd/pull/7967).
-  - Previously, etcd did not respect `--max-snapshots` flag to purge old `*.snap.db` files.
-  - Now, etcd purges old `*.snap.db` files to keep maximum `--max-snapshots` number of files on disk.
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.14](https://github.com/etcd-io/etcd/releases/tag/v3.1.14) (2018-04-24)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.13...v3.1.14) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Add [`etcd_server_is_leader`](https://github.com/etcd-io/etcd/pull/9587) Prometheus metric.
-
-### etcd server
-
-- Add [`--initial-election-tick-advance`](https://github.com/etcd-io/etcd/pull/9591) flag to configure initial election tick fast-forward.
-  - By default, `--initial-election-tick-advance=true`, then local member fast-forwards election ticks to speed up "initial" leader election trigger.
-  - This benefits the case of larger election ticks. For instance, cross datacenter deployment may require longer election timeout of 10-second. If true, local node does not need wait up to 10-second. Instead, forwards its election ticks to 8-second, and have only 2-second left before leader election.
-  - Major assumptions are that: cluster has no active leader thus advancing ticks enables faster leader election. Or cluster already has an established leader, and rejoining follower is likely to receive heartbeats from the leader after tick advance and before election timeout.
-  - However, when network from leader to rejoining follower is congested, and the follower does not receive leader heartbeat within left election ticks, disruptive election has to happen thus affecting cluster availabilities.
-  - Now, this can be disabled by setting `--initial-election-tick-advance=false`.
-  - Disabling this would slow down initial bootstrap process for cross datacenter deployments. Make tradeoffs by configuring `--initial-election-tick-advance` at the cost of slow initial bootstrap.
-  - If single-node, it advances ticks regardless.
-  - Address [disruptive rejoining follower node](https://github.com/etcd-io/etcd/issues/9333).
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.13](https://github.com/etcd-io/etcd/releases/tag/v3.1.13) (2018-03-29)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.12...v3.1.13) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Improved
-
-- Adjust [election timeout on server restart](https://github.com/etcd-io/etcd/pull/9415) to reduce [disruptive rejoining servers](https://github.com/etcd-io/etcd/issues/9333).
-  - Previously, etcd fast-forwards election ticks on server start, with only one tick left for leader election. This is to speed up start phase, without having to wait until all election ticks elapse. Advancing election ticks is useful for cross datacenter deployments with larger election timeouts. However, it was affecting cluster availability if the last tick elapses before leader contacts the restarted node.
-  - Now, when etcd restarts, it adjusts election ticks with more than one tick left, thus more time for leader to prevent disruptive restart.
-
-### Metrics, Monitoring
-
-See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Add missing [`etcd_network_peer_sent_failures_total` count](https://github.com/etcd-io/etcd/pull/9437).
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.12](https://github.com/etcd-io/etcd/releases/tag/v3.1.12) (2018-03-08)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.11...v3.1.12) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/etcd-io/etcd/pull/9297).
-  - "unsynced" watcher is watcher that needs to be in sync with events that have happened.
-  - That is, "unsynced" watcher is the slow watcher that was requested on old revision.
-  - "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
-  - Which possibly causes [missing events from "unsynced" watchers](https://github.com/etcd-io/etcd/issues/9086).
-  - A node gets network partitioned with a watcher on a future revision, and falls behind receiving a leader snapshot after partition gets removed. When applying this snapshot, etcd watch storage moves current synced watchers to unsynced since sync watchers might have become stale during network partition. And reset synced watcher group to restart watcher routines. Previously, there was a bug when moving from synced watcher group to unsynced, thus client would miss events when the watcher was requested to the network-partitioned node.
-
-### Go
-
-- Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.11](https://github.com/etcd-io/etcd/releases/tag/v3.1.11) (2017-11-28)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.10...v3.1.11) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- [#8411](https://github.com/etcd-io/etcd/issues/8411),[#8806](https://github.com/etcd-io/etcd/pull/8806) backport "mvcc: sending events after restore"
-- [#8009](https://github.com/etcd-io/etcd/issues/8009),[#8902](https://github.com/etcd-io/etcd/pull/8902) backport coreos/bbolt v1.3.1-coreos.5
-
-### Go
-
-- Compile with [*Go 1.8.5*](https://golang.org/doc/devel/release.html#go1.8).
-
-
-<hr>
-
-
-## [v3.1.10](https://github.com/etcd-io/etcd/releases/tag/v3.1.10) (2017-07-14)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.9...v3.1.10) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Added
-
-- Tag docker images with minor versions.
-  - e.g. `docker pull quay.io/coreos/etcd:v3.1` to fetch latest v3.1 versions.
-
-### Go
-
-- Compile with [*Go 1.8.3*](https://golang.org/doc/devel/release.html#go1.8).
-  - Fix panic on `net/http.CloseNotify`
-
-
-<hr>
-
-
-## [v3.1.9](https://github.com/etcd-io/etcd/releases/tag/v3.1.9) (2017-06-09)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.8...v3.1.9) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Allow v2 snapshot over 512MB.
-
-### Go
-
-- Compile with [*Go 1.7.6*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.8](https://github.com/etcd-io/etcd/releases/tag/v3.1.8) (2017-05-19)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.7...v3.1.8) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.7](https://github.com/etcd-io/etcd/releases/tag/v3.1.7) (2017-04-28)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.6...v3.1.7) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.6](https://github.com/etcd-io/etcd/releases/tag/v3.1.6) (2017-04-19)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.5...v3.1.6) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Fill in Auth API response header.
-- Remove auth check in Status API.
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.5](https://github.com/etcd-io/etcd/releases/tag/v3.1.5) (2017-03-27)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.4...v3.1.5) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd server
-
-- Fix raft memory leak issue.
-- Fix Windows file path issues.
-
-### Other
-
-- Add `/etc/nsswitch.conf` file to alpine-based Docker image.
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.4](https://github.com/etcd-io/etcd/releases/tag/v3.1.4) (2017-03-22)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.3...v3.1.4) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.3](https://github.com/etcd-io/etcd/releases/tag/v3.1.3) (2017-03-10)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.2...v3.1.3) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd gateway
-
-- Fix `etcd gateway` schema handling in DNS discovery.
-- Fix sd_notify behaviors in `gateway`, `grpc-proxy`.
-
-### gRPC Proxy
-
-- Fix sd_notify behaviors in `gateway`, `grpc-proxy`.
-
-### Other
-
-- Use machine default host when advertise URLs are default values(`localhost:2379,2380`) AND if listen URL is `0.0.0.0`.
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.2](https://github.com/etcd-io/etcd/releases/tag/v3.1.2) (2017-02-24)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.1...v3.1.2) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### etcd gateway
-
-- Fix `etcd gateway` with multiple endpoints.
-
-### Other
-
-- Use IPv4 default host, by default (when IPv4 and IPv6 are available).
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.1](https://github.com/etcd-io/etcd/releases/tag/v3.1.1) (2017-02-17)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.0...v3.1.1) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Go
-
-- Compile with [*Go 1.7.5*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-
-
-## [v3.1.0](https://github.com/etcd-io/etcd/releases/tag/v3.1.0) (2017-01-20)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.0.0...v3.1.0) and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.1 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_1/).**
-
-### Improved
-
-- Faster linearizable reads (implements Raft [read-index](https://github.com/etcd-io/etcd/pull/6212)).
-- v3 authentication API is now stable.
-
-### Breaking Changes
-
-- Deprecated following gRPC metrics in favor of [go-grpc-prometheus](https://github.com/grpc-ecosystem/go-grpc-prometheus).
-  - `etcd_grpc_requests_total`
-  - `etcd_grpc_requests_failed_total`
-  - `etcd_grpc_active_streams`
-  - `etcd_grpc_unary_requests_duration_seconds`
-
-### Dependency
-
-- Upgrade [`github.com/ugorji/go/codec`](https://github.com/ugorji/go) to [**`ugorji/go@9c7f9b7`**](https://github.com/ugorji/go/commit/9c7f9b7a2bc3a520f7c7b30b34b7f85f47fe27b6), and [regenerate v2 `client`](https://github.com/etcd-io/etcd/pull/6945).
-
-### Security, Authentication
-
-See [security doc](https://etcd.io/docs/latest/op-guide/security/) for more details.
-
-- SRV records (e.g., infra1.example.com) must match the discovery domain (i.e., example.com) if no custom certificate authority is given.
-  - `TLSConfig.ServerName` is ignored with user-provided certificates for backwards compatibility; to be deprecated.
-  - For example, `etcd --discovery-srv=example.com` will only authenticate peers/clients when the provided certs have root domain `example.com` as an entry in Subject Alternative Name (SAN) field.
-
-### etcd server
-
-- Automatic leadership transfer when leader steps down.
-- etcd flags
-  - `--strict-reconfig-check` flag is set by default.
-  - Add `--log-output` flag.
-  - Add `--metrics` flag.
-- etcd uses default route IP if advertise URL is not given.
-- Cluster rejects removing members if quorum will be lost.
-- Discovery now has upper limit for waiting on retries.
-- Warn on binding listeners through domain names; to be deprecated.
-- v3.0 and v3.1 with `--auto-compaction-retention=10` run periodic compaction on v3 key-value store for every 10-hour.
-  - Compactor only supports periodic compaction.
-  - Compactor records latest revisions every 5-minute, until it reaches the first compaction period (e.g. 10-hour).
-  - In order to retain key-value history of last compaction period, it uses the last revision that was fetched before compaction period, from the revision records that were collected every 5-minute.
-  - When `--auto-compaction-retention=10`, compactor uses revision 100 for compact revision where revision 100 is the latest revision fetched from 10 hours ago.
-  - If compaction succeeds or requested revision has already been compacted, it resets period timer and starts over with new historical revision records (e.g. restart revision collect and compact for the next 10-hour period).
-  - If compaction fails, it retries in 5 minutes.
-
-### client v3
-
-- Add `SetEndpoints` method; update endpoints at runtime.
-- Add `Sync` method; auto-update endpoints at runtime.
-- Add `Lease TimeToLive` API; fetch lease information.
-- replace Config.Logger field with global logger.
-- Get API responses are sorted in ascending order by default.
-
-### etcdctl v3
-
-- Add `lease timetolive` command.
-- Add `--print-value-only` flag to get command.
-- Add `--dest-prefix` flag to make-mirror command.
-- `get` command responses are sorted in ascending order by default.
-
-### gRPC Proxy
-
-- Experimental gRPC proxy feature.
-
-### Other
-
-- `recipes` now conform to sessions defined in `clientv3/concurrency`.
-- ACI has symlinks to `/usr/local/bin/etcd*`.
-
-### Go
-
-- Compile with [*Go 1.7.4*](https://golang.org/doc/devel/release.html#go1.7).
-
-
-<hr>
-

CHANGELOG/CHANGELOG-3.5.md

@@ -1,359 +0,0 @@
-
-
-Previous change logs can be found at [CHANGELOG-3.4](https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.4.md).
-
-
-The minimum recommended etcd versions to run in **production** are 3.3.18+, 3.4.2+, and 3.5.2+. Refer to the [versioning policy](https://etcd.io/docs/v3.5/op-guide/versioning/) for more details.
-
-<hr>
-
-## v3.5.3 (TBD)
-
-### etcd server
-- Fix [Provide a better liveness probe for when etcd runs as a Kubernetes pod](https://github.com/etcd-io/etcd/pull/13706)
-
-### package `client/pkg/v3`
-
-- [Trim the suffix dot from the target](https://github.com/etcd-io/etcd/pull/13714) in SRV records returned by DNS lookup
-
-### etcdctl v3
-
-- [Always print the raft_term in decimal](https://github.com/etcd-io/etcd/pull/13727) when displaying member list in json.
-
-<hr>
-
-## [v3.5.2](https://github.com/etcd-io/etcd/releases/tag/v3.5.2) (2022-02-01)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.5.1...v3.5.2) and [v3.5 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_5/) for any breaking changes.
-
-### etcd server
-- Fix [exclude the same alarm type activated by multiple peers](https://github.com/etcd-io/etcd/pull/13476).
-- Add [`etcd --experimental-enable-lease-checkpoint-persist`](https://github.com/etcd-io/etcd/pull/13508) flag to enable checkpoint persisting.
-- Fix [Lease checkpoints don't prevent to reset ttl on leader change](https://github.com/etcd-io/etcd/pull/13508), requires enabling checkpoint persisting.
-- Fix [assertion failed due to tx closed when recovering v3 backend from a snapshot db](https://github.com/etcd-io/etcd/pull/13501)
-
-<hr>
-
-## [v3.5.1](https://github.com/etcd-io/etcd/releases/tag/v3.5.1) (2021-10-15)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0...v3.5.1) and [v3.5 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_5/) for any breaking changes.
-
-### etcd server
-
-- Fix [self-signed-cert-validity parameter cannot be specified in the config file](https://github.com/etcd-io/etcd/pull/13237).
-- Fix [ensure that cluster members stored in v2store and backend are in sync](https://github.com/etcd-io/etcd/pull/13348)
-
-### etcd client
-
-- [Fix etcd client sends invalid :authority header](https://github.com/etcd-io/etcd/issues/13192)
-
-### package clientv3
-
-- Endpoints self identify now as `etcd-endpoints://{id}/{authority}` where authority is based on first endpoint passed, for example `etcd-endpoints://0xc0009d8540/localhost:2079`
-
-### Other
-
-- Updated [base image](https://github.com/etcd-io/etcd/pull/13386) from `debian:buster-v1.4.0` to `debian:bullseye-20210927` to fix the following critical CVEs:
-  - [CVE-2021-3711](https://nvd.nist.gov/vuln/detail/CVE-2021-3711): miscalculation of a buffer size in openssl's SM2 decryption
-  - [CVE-2021-35942](https://nvd.nist.gov/vuln/detail/CVE-2021-35942): integer overflow flaw in glibc
-  - [CVE-2019-9893](https://nvd.nist.gov/vuln/detail/CVE-2019-9893): incorrect syscall argument generation in libseccomp
-  - [CVE-2021-36159](https://nvd.nist.gov/vuln/detail/CVE-2021-36159): libfetch in apk-tools mishandles numeric strings in FTP and HTTP protocols to allow out of bound reads.
-
-<hr>
-
-## v3.5.0 (2021-06)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0...v3.5.0) and [v3.5 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_5/) for any breaking changes.
-
-- [v3.5.0](https://github.com/etcd-io/etcd/releases/tag/v3.5.0) (2021 TBD), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-rc.1...v3.5.0).
-- [v3.5.0-rc.1](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-rc.1) (2021-06-10), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-rc.0...v3.5.0-rc.1).
-- [v3.5.0-rc.0](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-rc.0) (2021-06-04), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-beta.4...v3.5.0-rc.0).
-- [v3.5.0-beta.4](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-beta.4) (2021-05-26), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-beta.3...v3.5.0-beta.4).
-- [v3.5.0-beta.3](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-beta.3) (2021-05-18), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-beta.2...v3.5.0-beta.3).
-- [v3.5.0-beta.2](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-beta.2) (2021-05-18), see [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0-beta.1...v3.5.0-beta.2).
-- [v3.5.0-beta.1](https://github.com/etcd-io/etcd/releases/tag/v3.5.0-beta.1) (2021-05-18), see [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0...v3.5.0-beta.1).
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.5 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_3_5/).**
-
-### Breaking Changes
-
-- `go.etcd.io/etcd` Go packages have moved to `go.etcd.io/etcd/{api,pkg,raft,client,etcdctl,server,raft,tests}/v3` to follow the [Go modules](https://github.com/golang/go/wiki/Modules) conventions
-- `go.etcd.io/clientv3/snapshot` SnapshotManager class have moved to `go.etcd.io/clientv3/etcdctl`.
-   The method `snapshot.Save` to download a snapshot from the remote server was preserved in 'go.etcd.io/clientv3/snapshot`.
-- `go.etcd.io/client' package got migrated to 'go.etcd.io/client/v2'.
-- Changed behavior of clientv3 API [MemberList](https://github.com/etcd-io/etcd/pull/11639).
-  - Previously, it is directly served with server's local data, which could be stale.
-  - Now, it is served with linearizable guarantee. If the server is disconnected from quorum, `MemberList` call will fail.
-- [gRPC gateway](https://github.com/grpc-ecosystem/grpc-gateway) only supports [`/v3`](TODO) endpoint.
-  - Deprecated [`/v3beta`](https://github.com/etcd-io/etcd/pull/9298).
-  - `curl -L http://localhost:2379/v3beta/kv/put -X POST -d '{"key": "Zm9v", "value": "YmFy"}'` doesn't work in v3.5. Use `curl -L http://localhost:2379/v3/kv/put -X POST -d '{"key": "Zm9v", "value": "YmFy"}'` instead.
-- **`etcd --experimental-enable-v2v3` flag remains experimental and to be deprecated.**
-  - v2 storage emulation feature will be deprecated in the next release.
-  - etcd 3.5 is the last version that supports V2 API. Flags `--enable-v2` and `--experimental-enable-v2v3` [are now deprecated](https://github.com/etcd-io/etcd/pull/12940) and will be removed in etcd v3.6 release.
-- **`etcd --experimental-backend-bbolt-freelist-type` flag has been deprecated.** Use **`etcd --backend-bbolt-freelist-type`** instead. The default type is hashmap and it is stable now.
-- **`etcd --debug` flag has been deprecated.** Use **`etcd --log-level=debug`** instead.
-- Remove [`embed.Config.Debug`](https://github.com/etcd-io/etcd/pull/10947).
-- **`etcd --log-output` flag has been deprecated.** Use **`etcd --log-outputs`** instead.
-- **`etcd --logger=zap --log-outputs=stderr`** is now the default.
-- **`etcd --logger=capnslog` flag value has been deprecated.**
-- **`etcd --logger=zap --log-outputs=default` flag value is not supported.**.
-  - Use `etcd --logger=zap --log-outputs=stderr`.
-  - Or, use `etcd --logger=zap --log-outputs=systemd/journal` to send logs to the local systemd journal.
-  - Previously, if etcd parent process ID (PPID) is 1 (e.g. run with systemd), `etcd --logger=capnslog --log-outputs=default` redirects server logs to local systemd journal. And if write to journald fails, it writes to `os.Stderr` as a fallback.
-  - However, even with PPID 1, it can fail to dial systemd journal (e.g. run embedded etcd with Docker container). Then, [every single log write will fail](https://github.com/etcd-io/etcd/pull/9729) and fall back to `os.Stderr`, which is inefficient.
-  - To avoid this problem, systemd journal logging must be configured manually.
-- **`etcd --log-outputs=stderr`** is now the default.
-- **`etcd --log-package-levels` flag for `capnslog` has been deprecated.** Now, **`etcd --logger=zap --log-outputs=stderr`** is the default.
-- **`[CLIENT-URL]/config/local/log` endpoint has been deprecated, as is `etcd --log-package-levels` flag.**
-  - `curl http://127.0.0.1:2379/config/local/log -XPUT -d '{"Level":"DEBUG"}'` won't work.
-  - Please use `etcd --logger=zap --log-outputs=stderr` instead.
-- Deprecated `etcd_debugging_mvcc_db_total_size_in_bytes` Prometheus metric. Use `etcd_mvcc_db_total_size_in_bytes` instead.
-- Deprecated `etcd_debugging_mvcc_put_total` Prometheus metric. Use `etcd_mvcc_put_total` instead.
-- Deprecated `etcd_debugging_mvcc_delete_total` Prometheus metric. Use `etcd_mvcc_delete_total` instead.
-- Deprecated `etcd_debugging_mvcc_txn_total` Prometheus metric. Use `etcd_mvcc_txn_total` instead.
-- Deprecated `etcd_debugging_mvcc_range_total` Prometheus metric. Use `etcd_mvcc_range_total` instead.
-- Main branch `/version` outputs `3.5.0-pre`, instead of `3.4.0+git`.
-- Changed `proxy` package function signature to [support structured logger](https://github.com/etcd-io/etcd/pull/11614).
-  - Previously, `NewClusterProxy(c *clientv3.Client, advaddr string, prefix string) (pb.ClusterServer, <-chan struct{})`, now `NewClusterProxy(lg *zap.Logger, c *clientv3.Client, advaddr string, prefix string) (pb.ClusterServer, <-chan struct{})`.
-  - Previously, `Register(c *clientv3.Client, prefix string, addr string, ttl int)`, now `Register(lg *zap.Logger, c *clientv3.Client, prefix string, addr string, ttl int) <-chan struct{}`.
-  - Previously, `NewHandler(t *http.Transport, urlsFunc GetProxyURLs, failureWait time.Duration, refreshInterval time.Duration) http.Handler`, now `NewHandler(lg *zap.Logger, t *http.Transport, urlsFunc GetProxyURLs, failureWait time.Duration, refreshInterval time.Duration) http.Handler`.
-- Changed `pkg/flags` function signature to [support structured logger](https://github.com/etcd-io/etcd/pull/11616).
-  - Previously, `SetFlagsFromEnv(prefix string, fs *flag.FlagSet) error`, now `SetFlagsFromEnv(lg *zap.Logger, prefix string, fs *flag.FlagSet) error`.
-  - Previously, `SetPflagsFromEnv(prefix string, fs *pflag.FlagSet) error`, now `SetPflagsFromEnv(lg *zap.Logger, prefix string, fs *pflag.FlagSet) error`.
-- ClientV3 supports [grpc resolver API](https://github.com/etcd-io/etcd/blob/main/client/v3/naming/resolver/resolver.go).
-  - Endpoints can be managed using [endpoints.Manager](https://github.com/etcd-io/etcd/blob/main/client/v3/naming/endpoints/endpoints.go)
-  - Previously supported [GRPCResolver was decomissioned](https://github.com/etcd-io/etcd/pull/12675). Use [resolver](https://github.com/etcd-io/etcd/blob/main/client/v3/naming/resolver/resolver.go) instead.
-- Turned on [--pre-vote by default](https://github.com/etcd-io/etcd/pull/12770). Should prevent disrupting RAFT leader by an individual member.
-- [ETCD_CLIENT_DEBUG env](https://github.com/etcd-io/etcd/pull/12786): Now supports log levels (debug, info, warn, error, dpanic, panic, fatal). Only when set, overrides application-wide grpc logging settings.
-- [Embed Etcd.Close()](https://github.com/etcd-io/etcd/pull/12828) needs to called exactly once and closes Etcd.Err() stream.
-- [Embed Etcd does not override global/grpc logger](https://github.com/etcd-io/etcd/pull/12861) be default any longer. If desired, please call `embed.Config::SetupGlobalLoggers()` explicitly. 
-- [Embed Etcd custom logger should be configured using simpler builder `NewZapLoggerBuilder`](https://github.com/etcd-io/etcd/pull/12973).
-- Client errors of `context cancelled` or `context deadline exceeded` are exposed as `codes.Canceled` and `codes.DeadlineExceeded`, instead of `codes.Unknown`.
-
-
-### Storage format changes
-- [WAL log's snapshots persists raftpb.ConfState](https://github.com/etcd-io/etcd/pull/12735)
-- [Backend persists raftpb.ConfState](https://github.com/etcd-io/etcd/pull/12962) in the `meta` bucket `confState` key.
-- [Backend persists applied term](https://github.com/etcd-io/etcd/pull/) in the `meta` bucket.
-- Backend persists `downgrade` in the `cluster` bucket
-
-### Security
-
-- Add [`TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256` and `TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256` to `etcd --cipher-suites`](https://github.com/etcd-io/etcd/pull/11864).
-- Changed [the format of WAL entries related to auth for not keeping password as a plain text](https://github.com/etcd-io/etcd/pull/11943).
-- Add third party [Security Audit Report](https://github.com/etcd-io/etcd/pull/12201).
-- A [log warning](https://github.com/etcd-io/etcd/pull/12242) is added when etcd uses any existing directory that has a permission different than 700 on Linux and 777 on Windows.
-- Add optional [`ClientCertFile` and `ClientKeyFile`](https://github.com/etcd-io/etcd/pull/12705) options for peer and client tls configuration when split certificates are used.
-
-### Metrics, Monitoring
-
-See [List of metrics](https://etcd.io/docs/latest/metrics/) for all metrics per release.
-
-Note that any `etcd_debugging_*` metrics are experimental and subject to change.
-
-- Deprecated `etcd_debugging_mvcc_db_total_size_in_bytes` Prometheus metric. Use `etcd_mvcc_db_total_size_in_bytes` instead.
-- Deprecated `etcd_debugging_mvcc_put_total` Prometheus metric. Use `etcd_mvcc_put_total` instead.
-- Deprecated `etcd_debugging_mvcc_delete_total` Prometheus metric. Use `etcd_mvcc_delete_total` instead.
-- Deprecated `etcd_debugging_mvcc_txn_total` Prometheus metric. Use `etcd_mvcc_txn_total` instead.
-- Deprecated `etcd_debugging_mvcc_range_total` Prometheus metric. Use `etcd_mvcc_range_total` instead.
-- Add [`etcd_debugging_mvcc_current_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
-- Add [`etcd_debugging_mvcc_compact_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
-- Change [`etcd_cluster_version`](https://github.com/etcd-io/etcd/pull/11254) Prometheus metrics to include only major and minor version.
-- Add [`etcd_debugging_mvcc_total_put_size_in_bytes`](https://github.com/etcd-io/etcd/pull/11374) Prometheus metric.
-- Add [`etcd_server_client_requests_total` with `"type"` and `"client_api_version"` labels](https://github.com/etcd-io/etcd/pull/11687).
-- Add [`etcd_wal_write_bytes_total`](https://github.com/etcd-io/etcd/pull/11738).
-- Add [`etcd_debugging_auth_revision`](https://github.com/etcd-io/etcd/commit/f14d2a087f7b0fd6f7980b95b5e0b945109c95f3).
-- Add [`os_fd_used` and `os_fd_limit` to monitor current OS file descriptors](https://github.com/etcd-io/etcd/pull/12214).
-- Add [`etcd_disk_defrag_inflight`](https://github.com/etcd-io/etcd/pull/13395).
-
-### etcd server
-
-  - Add [don't attempt to grant nil permission to a role](https://github.com/etcd-io/etcd/pull/13086).
-  - Add [don't activate alarms w/missing AlarmType](https://github.com/etcd-io/etcd/pull/13084).
-  - Add [`TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256` and `TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256` to `etcd --cipher-suites`](https://github.com/etcd-io/etcd/pull/11864).
-  - Automatically [create parent directory if it does not exist](https://github.com/etcd-io/etcd/pull/9626) (fix [issue#9609](https://github.com/etcd-io/etcd/issues/9609)).
-  - v4.0 will configure `etcd --enable-v2=true --enable-v2v3=/aaa` to enable v2 API server that is backed by **v3 storage**.
-- [`etcd --backend-bbolt-freelist-type`] flag is now stable.
-  - `etcd --experimental-backend-bbolt-freelist-type` has been deprecated.
-- Support [downgrade API](https://github.com/etcd-io/etcd/pull/11715).
-- Deprecate v2 apply on cluster version. [Use v3 request to set cluster version and recover cluster version from v3 backend](https://github.com/etcd-io/etcd/pull/11427).
-- [Use v2 api to update cluster version to support mixed version cluster during upgrade](https://github.com/etcd-io/etcd/pull/12988).
-- [Fix corruption bug in defrag](https://github.com/etcd-io/etcd/pull/11613).
-- Fix [quorum protection logic when promoting a learner](https://github.com/etcd-io/etcd/pull/11640).
-- Improve [peer corruption checker](https://github.com/etcd-io/etcd/pull/11621) to work when peer mTLS is enabled.
-- Log [`[CLIENT-PORT]/health` check in server side](https://github.com/etcd-io/etcd/pull/11704).
-- Log [successful etcd server-side health check in debug level](https://github.com/etcd-io/etcd/pull/12677).
-- Improve [compaction performance when latest index is greater than 1-million](https://github.com/etcd-io/etcd/pull/11734).
-- [Refactor consistentindex](https://github.com/etcd-io/etcd/pull/11699).
-- [Add log when etcdserver failed to apply command](https://github.com/etcd-io/etcd/pull/11670).
-- Improve [count-only range performance](https://github.com/etcd-io/etcd/pull/11771).
-- Remove [redundant storage restore operation to shorten the startup time](https://github.com/etcd-io/etcd/pull/11779).
-  - With 40 million key test data,it can shorten the startup time from 5 min to 2.5 min.
-- [Fix deadlock bug in mvcc](https://github.com/etcd-io/etcd/pull/11817).
-- Fix [inconsistency between WAL and server snapshot](https://github.com/etcd-io/etcd/pull/11888).
-  - Previously, server restore fails if it had crashed after persisting raft hard state but before saving snapshot.
-  - See https://github.com/etcd-io/etcd/issues/10219 for more.
-  - Add [missing CRC checksum check in WAL validate method otherwise causes panic](https://github.com/etcd-io/etcd/pull/11924).
-  - See https://github.com/etcd-io/etcd/issues/11918.
-- Improve logging around snapshot send and receive.
-- [Push down RangeOptions.limit argv into index tree to reduce memory overhead](https://github.com/etcd-io/etcd/pull/11990).
-- Add [reason field for /health response](https://github.com/etcd-io/etcd/pull/11983).
-- Add [exclude alarms from health check conditionally](https://github.com/etcd-io/etcd/pull/12880).
-- Add [`etcd --unsafe-no-fsync`](https://github.com/etcd-io/etcd/pull/11946) flag.
-  - Setting the flag disables all uses of fsync, which is unsafe and will cause data loss. This flag makes it possible to run an etcd node for testing and development without placing lots of load on the file system.
-- Add [`etcd --auth-token-ttl`](https://github.com/etcd-io/etcd/pull/11980) flag to customize `simpleTokenTTL` settings.
-- Improve [`runtime.FDUsage` call pattern to reduce objects malloc of Memory Usage and CPU Usage](https://github.com/etcd-io/etcd/pull/11986).
-- Improve [mvcc.watchResponse channel Memory Usage](https://github.com/etcd-io/etcd/pull/11987).
-- Log [expensive request info in UnaryInterceptor](https://github.com/etcd-io/etcd/pull/12086).
-- [Fix invalid Go type in etcdserverpb](https://github.com/etcd-io/etcd/pull/12000).
-- [Improve healthcheck by using v3 range request and its corresponding timeout](https://github.com/etcd-io/etcd/pull/12195).
-- Add [`etcd --experimental-watch-progress-notify-interval`](https://github.com/etcd-io/etcd/pull/12216) flag to make watch progress notify interval configurable.
-- Fix [server panic in slow writes warnings](https://github.com/etcd-io/etcd/issues/12197).
-  - Fixed via [PR#12238](https://github.com/etcd-io/etcd/pull/12238).
-- [Fix server panic](https://github.com/etcd-io/etcd/pull/12288) when force-new-cluster flag is enabled in a cluster which had learner node.
-- Add [`etcd --self-signed-cert-validity`](https://github.com/etcd-io/etcd/pull/12429) flag to support setting certificate expiration time.
-  - Notice, certificates generated by etcd are valid for 1 year by default when specifying the auto-tls or peer-auto-tls option.
-- Add [`etcd --experimental-warning-apply-duration`](https://github.com/etcd-io/etcd/pull/12448) flag which allows apply duration threshold to be configurable.
-- Add [`etcd --experimental-memory-mlock`](https://github.com/etcd-io/etcd/pull/TODO) flag which prevents etcd memory pages to be swapped out.
-- Add [`etcd --socket-reuse-port`](https://github.com/etcd-io/etcd/pull/12702) flag
-  - Setting this flag enables `SO_REUSEPORT` which allows rebind of a port already in use. User should take caution when using this flag to ensure flock is properly enforced.
-- Add [`etcd --socket-reuse-address`](https://github.com/etcd-io/etcd/pull/12702) flag
-  - Setting this flag enables `SO_REUSEADDR` which allows binding to an address in `TIME_WAIT` state, improving etcd restart time.
-- Reduce [around 30% memory allocation by logging range response size without marshal](https://github.com/etcd-io/etcd/pull/12871).
-- `ETCD_VERIFY="all"` environment triggers [additional verification of consistency](https://github.com/etcd-io/etcd/pull/12901) of etcd data-dir files.
-- Add [`etcd --enable-log-rotation`](https://github.com/etcd-io/etcd/pull/12774) boolean flag which enables log rotation if true.
-- Add [`etcd --log-rotation-config-json`](https://github.com/etcd-io/etcd/pull/12774) flag which allows passthrough of JSON config to configure log rotation for a file output target.
-- Add experimental distributed tracing boolean flag [`--experimental-enable-distributed-tracing`](https://github.com/etcd-io/etcd/pull/12919) which enables tracing.
-- Add [`etcd --experimental-distributed-tracing-address`](https://github.com/etcd-io/etcd/pull/12919) string flag which allows configuring the OpenTelemetry collector address.
-- Add [`etcd --experimental-distributed-tracing-service-name`](https://github.com/etcd-io/etcd/pull/12919) string flag which allows changing the default "etcd" service name.
-- Add [`etcd --experimental-distributed-tracing-instance-id`](https://github.com/etcd-io/etcd/pull/12919) string flag which configures an instance ID, which must be unique per etcd instance.
-
-### Package `runtime`
-
-- Optimize [`runtime.FDUsage` by removing unnecessary sorting](https://github.com/etcd-io/etcd/pull/12214).
-
-### Package `embed`
-
-- Remove [`embed.Config.Debug`](https://github.com/etcd-io/etcd/pull/10947).
-  - Use `embed.Config.LogLevel` instead.
-- Add [`embed.Config.ZapLoggerBuilder`](https://github.com/etcd-io/etcd/pull/11147) to allow creating a custom zap logger.
-- Replace [global `*zap.Logger` with etcd server logger object](https://github.com/etcd-io/etcd/pull/12212).
-- Add [`embed.Config.EnableLogRotation`](https://github.com/etcd-io/etcd/pull/12774) which enables log rotation if true.
-- Add [`embed.Config.LogRotationConfigJSON`](https://github.com/etcd-io/etcd/pull/12774) to allow passthrough of JSON config to configure log rotation for a file output target.
-- Add [`embed.Config.ExperimentalEnableDistributedTracing`](https://github.com/etcd-io/etcd/pull/12919) which enables experimental distributed tracing if true.
-- Add [`embed.Config.ExperimentalDistributedTracingAddress`](https://github.com/etcd-io/etcd/pull/12919) which allows overriding default collector address.
-- Add [`embed.Config.ExperimentalDistributedTracingServiceName`](https://github.com/etcd-io/etcd/pull/12919) which allows overriding default "etcd" service name.
-- Add [`embed.Config.ExperimentalDistributedTracingServiceInstanceID`](https://github.com/etcd-io/etcd/pull/12919) which allows configuring an instance ID, which must be uniquer per etcd instance.
-
-### Package `clientv3`
-
-- Remove [excessive watch cancel logging messages](https://github.com/etcd-io/etcd/pull/12187).
-  - See [kubernetes/kubernetes#93450](https://github.com/kubernetes/kubernetes/issues/93450).
-- Add [`TryLock`](https://github.com/etcd-io/etcd/pull/11104) method to `clientv3/concurrency/Mutex`. A non-blocking method on `Mutex` which does not wait to get lock on the Mutex, returns immediately if Mutex is locked by another session.
-- Fix [client balancer failover against multiple endpoints](https://github.com/etcd-io/etcd/pull/11184).
-  - Fix [`"kube-apiserver: failover on multi-member etcd cluster fails certificate check on DNS mismatch"`](https://github.com/kubernetes/kubernetes/issues/83028).
-- Fix [IPv6 endpoint parsing in client](https://github.com/etcd-io/etcd/pull/11211).
-  - Fix ["1.16: etcd client does not parse IPv6 addresses correctly when members are joining" (kubernetes#83550)](https://github.com/kubernetes/kubernetes/issues/83550).
-- Fix [errors caused by grpc changing balancer/resolver API](https://github.com/etcd-io/etcd/pull/11564). This change is compatible with grpc >= [v1.26.0](https://github.com/grpc/grpc-go/releases/tag/v1.26.0), but is not compatible with < v1.26.0 version.
-- Use [ServerName as the authority](https://github.com/etcd-io/etcd/pull/11574) after bumping to grpc v1.26.0. Remove workaround in [#11184](https://github.com/etcd-io/etcd/pull/11184).
-- Fix [`"hasleader"` metadata embedding](https://github.com/etcd-io/etcd/pull/11687).
-  - Previously, `clientv3.WithRequireLeader(ctx)` was overwriting existing context keys.
-- Fix [watch leak caused by lazy cancellation](https://github.com/etcd-io/etcd/pull/11850). When clients cancel their watches, a cancel request will now be immediately sent to the server instead of waiting for the next watch event.
-- Make sure [save snapshot downloads checksum for integrity checks](https://github.com/etcd-io/etcd/pull/11896).
-- Fix [auth token invalid after watch reconnects](https://github.com/etcd-io/etcd/pull/12264). Get AuthToken automatically when clientConn is ready.
-- Improve [clientv3:get AuthToken gracefully without extra connection](https://github.com/etcd-io/etcd/pull/12165).
-- Changed [clientv3 dialing code](https://github.com/etcd-io/etcd/pull/12671) to use grpc resolver API instead of custom balancer.
-  - Endpoints self identify now as `etcd-endpoints://{id}/#initially={list of endpoints}` e.g. `etcd-endpoints://0xc0009d8540/#initially=[localhost:2079]`
-- Make sure [save snapshot downloads checksum for integrity checks](https://github.com/etcd-io/etcd/pull/11896).
-
-### Package `lease`
-
-- Fix [memory leak in follower nodes](https://github.com/etcd-io/etcd/pull/11731).
-  - https://github.com/etcd-io/etcd/issues/11495
-  - https://github.com/etcd-io/etcd/issues/11730
-- Make sure [grant/revoke won't be applied repeatedly after restarting etcd](https://github.com/etcd-io/etcd/pull/11935).
-
-### Package `wal`
-
-- Add [`etcd_wal_write_bytes_total`](https://github.com/etcd-io/etcd/pull/11738).
-- Handle [out-of-range slice bound in `ReadAll` and entry limit in `decodeRecord`](https://github.com/etcd-io/etcd/pull/11793).
-
-### etcdctl v3
-
-- Fix `etcdctl member add` command to prevent potential timeout. ([PR#11194](https://github.com/etcd-io/etcd/pull/11194) and [PR#11638](https://github.com/etcd-io/etcd/pull/11638))
-- Add [`etcdctl watch --progress-notify`](https://github.com/etcd-io/etcd/pull/11462) flag.
-- Add [`etcdctl auth status`](https://github.com/etcd-io/etcd/pull/11536) command to check if authentication is enabled
-- Add [`etcdctl get --count-only`](https://github.com/etcd-io/etcd/pull/11743) flag for output type `fields`.
-- Add [`etcdctl member list -w=json --hex`](https://github.com/etcd-io/etcd/pull/11812) flag to print memberListResponse in hex format json.
-- Changed [`etcdctl lock <lockname> exec-command`](https://github.com/etcd-io/etcd/pull/12829) to return exit code of exec-command.
-- [New tool: `etcdutl`](https://github.com/etcd-io/etcd/pull/12971) incorporated functionality of: `etcdctl snapshot status|restore`, `etcdctl backup`, `etcdctl defrag --data-dir ...`.
-- [ETCDCTL_API=2 `etcdctl migrate`](https://github.com/etcd-io/etcd/pull/12971) has been decomissioned. Use etcd <=v3.4 to restore v2 storage.
-
-### gRPC gateway
-
-- [gRPC gateway](https://github.com/grpc-ecosystem/grpc-gateway) only supports [`/v3`](TODO) endpoint.
-  - Deprecated [`/v3beta`](https://github.com/etcd-io/etcd/pull/9298).
-  - `curl -L http://localhost:2379/v3beta/kv/put -X POST -d '{"key": "Zm9v", "value": "YmFy"}'` does work in v3.5. Use `curl -L http://localhost:2379/v3/kv/put -X POST -d '{"key": "Zm9v", "value": "YmFy"}'` instead.
-- Set [`enable-grpc-gateway`](https://github.com/etcd-io/etcd/pull/12297) flag to true when using a config file to keep the defaults the same as the command line configuration.
-
-### gRPC Proxy
-
-- Fix [`panic on error`](https://github.com/etcd-io/etcd/pull/11694) for metrics handler.
-- Add [gRPC keepalive related flags](https://github.com/etcd-io/etcd/pull/11711) `grpc-keepalive-min-time`, `grpc-keepalive-interval` and `grpc-keepalive-timeout`.
-- [Fix grpc watch proxy hangs when failed to cancel a watcher](https://github.com/etcd-io/etcd/pull/12030) .
-- Add [metrics handler for grpcproxy self](https://github.com/etcd-io/etcd/pull/12107).
-- Add [health handler for grpcproxy self](https://github.com/etcd-io/etcd/pull/12114).
-
-### Auth
-
-- Fix [NoPassword check when adding user through GRPC gateway](https://github.com/etcd-io/etcd/pull/11418) ([issue#11414](https://github.com/etcd-io/etcd/issues/11414))
-- Fix bug where [some auth related messages are logged at wrong level](https://github.com/etcd-io/etcd/pull/11586)
-- [Fix a data corruption bug by saving consistent index](https://github.com/etcd-io/etcd/pull/11652).
-- [Improve checkPassword performance](https://github.com/etcd-io/etcd/pull/11735).
-- [Add authRevision field in AuthStatus](https://github.com/etcd-io/etcd/pull/11659).
-- Fix [a bug of not refreshing expired tokens](https://github.com/etcd-io/etcd/pull/13308).
-- 
-### API
-
-- Add [`/v3/auth/status`](https://github.com/etcd-io/etcd/pull/11536) endpoint to check if authentication is enabled
-- [Add `Linearizable` field to `etcdserverpb.MemberListRequest`](https://github.com/etcd-io/etcd/pull/11639).
-- [Learner support Snapshot RPC](https://github.com/etcd-io/etcd/pull/12890/).
-
-### Package `netutil`
-
-- Remove [`netutil.DropPort/RecoverPort/SetLatency/RemoveLatency`](https://github.com/etcd-io/etcd/pull/12491).
-  - These are not used anymore. They were only used for older versions of functional testing.
-  - Removed to adhere to best security practices, minimize arbitrary shell invocation.
-
-### `tools/etcd-dump-metrics`
-
-- Implement [input validation to prevent arbitrary shell invocation](https://github.com/etcd-io/etcd/pull/12491).
-
-### Dependency
-
-- Upgrade [`google.golang.org/grpc`](https://github.com/grpc/grpc-go/releases) from [**`v1.23.0`**](https://github.com/grpc/grpc-go/releases/tag/v1.23.0) to [**`v1.37.0`**](https://github.com/grpc/grpc-go/releases/tag/v1.37.0).
-- Upgrade [`go.uber.org/zap`](https://github.com/uber-go/zap/releases) from [**`v1.14.1`**](https://github.com/uber-go/zap/releases/tag/v1.14.1) to [**`v1.16.0`**](https://github.com/uber-go/zap/releases/tag/v1.16.0).
-
-### Platforms
-
-- etcd now [officially supports `arm64`](https://github.com/etcd-io/etcd/pull/12929).
-  - See https://github.com/etcd-io/etcd/pull/12928 for adding automated tests with `arm64` EC2 instances (Graviton 2).
-  - See https://github.com/etcd-io/website/pull/273 for new platform support tier policies.
-
-### Release
-
-- Add s390x build support ([PR#11548](https://github.com/etcd-io/etcd/pull/11548) and [PR#11358](https://github.com/etcd-io/etcd/pull/11358))
-
-### Go
-
-- Require [*Go 1.16+*](https://github.com/etcd-io/etcd/pull/11110).
-- Compile with [*Go 1.16+*](https://golang.org/doc/devel/release.html#go1.16)
-- etcd uses [go modules](https://github.com/etcd-io/etcd/pull/12279) (instead of vendor dir) to track dependencies.
-
-### Project Governance
-
-- The etcd team has added, a well defined and openly discussed, project [governance](https://github.com/etcd-io/etcd/pull/11175).
-
-
-<hr>
-

CHANGELOG/CHANGELOG-3.6.md

@@ -1,73 +0,0 @@
-
-
-Previous change logs can be found at [CHANGELOG-3.5](https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.5.md).
-
-<hr>
-
-## v3.6.0 (TBD)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0...v3.6.0).
-
-### Breaking Changes
-
-- `etcd` will no longer start on data dir created by newer versions (for example etcd v3.6 will not run on v3.7+ data dir). To downgrade data dir please check out `etcdutl migrate` command.
-
-### Deprecations
-
-- Deprecated [V2 discovery](https://etcd.io/docs/v3.5/dev-internal/discovery_protocol/).
-
-### etcdctl v3
-
-- Add command to generate [shell completion](https://github.com/etcd-io/etcd/pull/13133).
-- When print endpoint status, [show db size in use](https://github.com/etcd-io/etcd/pull/13639)
-- [Always print the raft_term in decimal](https://github.com/etcd-io/etcd/pull/13711) when displaying member list in json.
-
-### etcdutl v3
-
-- Add command to generate [shell completion](https://github.com/etcd-io/etcd/pull/13142).
-- Add `migrate` command for downgrading/upgrading etcd data dir files.
-
-### package `client/pkg/v3`
-- [Trim the suffix dot from the target](https://github.com/etcd-io/etcd/pull/13712) in SRV records returned by DNS lookup
-
-### Package `server`
-
-- Package `mvcc` was moved to `storage/mvcc`
-- Package `mvcc/backend` was moved to `storage/backend`
-- Package `mvcc/buckets` was moved to `storage/schema`
-- Package `wal` was moved to `storage/wal`
-- Package `datadir` was moved to `storage/datadir`
-
-### etcd server
-
-- Add [`etcd --log-format`](https://github.com/etcd-io/etcd/pull/13339) flag to support log format.
-- Add [`etcd --experimental-max-learners`](https://github.com/etcd-io/etcd/pull/13377) flag to allow configuration of learner max membership.
-- Add [`etcd --experimental-enable-lease-checkpoint-persist`](https://github.com/etcd-io/etcd/pull/13508) flag to handle upgrade from v3.5.2 clusters with this feature enabled.
-- Add [`etcdctl make-mirror --rev`](https://github.com/etcd-io/etcd/pull/13519) flag to support incremental mirror.
-- Add [`etcd --experimental-wait-cluster-ready-timeout`](https://github.com/etcd-io/etcd/pull/13525) flag to wait for cluster to be ready before serving client requests.
-- Add [v3 discovery](https://github.com/etcd-io/etcd/pull/13635) to bootstrap a new etcd cluster.
-- Fix [non mutating requests pass through quotaKVServer when NOSPACE](https://github.com/etcd-io/etcd/pull/13435)
-- Fix [exclude the same alarm type activated by multiple peers](https://github.com/etcd-io/etcd/pull/13467).
-- Fix [Provide a better liveness probe for when etcd runs as a Kubernetes pod](https://github.com/etcd-io/etcd/pull/13399)
-- Fix [Lease checkpoints don't prevent to reset ttl on leader change](https://github.com/etcd-io/etcd/pull/13508).
-- Fix [assertion failed due to tx closed when recovering v3 backend from a snapshot db](https://github.com/etcd-io/etcd/pull/13500)
-- Fix [A client can panic etcd by passing invalid utf-8 in the client-api-version header](https://github.com/etcd-io/etcd/pull/13560)
-- Fix [etcd gateway doesn't format the endpoint of IPv6 address correctly](https://github.com/etcd-io/etcd/pull/13551)
-- Fix [A client can cause a nil dereference in etcd by passing an invalid SortTarget](https://github.com/etcd-io/etcd/pull/13555)
-- Fix [Grant lease with negative ID can possibly cause db out of sync](https://github.com/etcd-io/etcd/pull/13676)
-
-### tools/benchmark
-
-- [Add etcd client autoSync flag](https://github.com/etcd-io/etcd/pull/13416)
-
-### Metrics, Monitoring
-
-See [List of metrics](https://etcd.io/docs/latest/metrics/) for all metrics per release.
-
-- Add [`etcd_disk_defrag_inflight`](https://github.com/etcd-io/etcd/pull/13371).
-
-### Other
-
-- Use Distroless as base image to make the image less vulnerable and reduce image size.
-
-<hr>

CHANGELOG/CHANGELOG-4.0.md

@@ -1,53 +0,0 @@
-
-
-Previous change logs can be found at [CHANGELOG-3.x](https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.x.md).
-
-
-The minimum recommended etcd versions to run in **production** are 3.2.28+, 3.3.18+, and 3.4.2+.
-
-
-<hr>
-
-
-## v4.0.0 (TBD)
-
-See [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0...v4.0.0) and [v4.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_4_0/) for any breaking changes.
-
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v4.0 upgrade guide](https://etcd.io/docs/latest/upgrades/upgrade_4_0/).**
-
-### Breaking Changes
-
-- [Secure etcd by default](https://github.com/etcd-io/etcd/issues/9475)?
-- Change `/health` endpoint output.
-  - Previously, `{"health":"true"}`.
-  - Now, `{"health":true}`.
-  - Breaks [Kubernetes `kubectl get componentstatuses` command](https://github.com/kubernetes/kubernetes/issues/58240).
-- Deprecate [`etcd --proxy*`](TODO) flags; **no more v2 proxy**.
-- Deprecate [v2 storage backend](https://github.com/etcd-io/etcd/issues/9232); **no more v2 store**.
-  - v2 API is still supported via [v2 emulation](TODO).
-- Deprecate [`etcdctl backup`](TODO) command.
-- `clientv3.Client.KeepAlive(ctx context.Context, id LeaseID) (<-chan *LeaseKeepAliveResponse, error)` is now [`clientv4.Client.KeepAlive(ctx context.Context, id LeaseID) <-chan *LeaseKeepAliveResponse`](TODO).
-  - Similar to `Watch`, [`KeepAlive` does not return errors](https://github.com/etcd-io/etcd/issues/7488).
-  - If there's an unknown server error, kill all open channels and create a new stream on the next `KeepAlive` call.
-- Rename `github.com/coreos/client` to `github.com/coreos/clientv2`.
-- [`etcd --experimental-initial-corrupt-check`](TODO) has been  deprecated.
-  - Use [`etcd --initial-corrupt-check`](TODO) instead.
-- [`etcd --experimental-corrupt-check-time`](TODO) has been  deprecated.
-  - Use [`etcd --corrupt-check-time`](TODO) instead.
-- Enable TLS 1.13, deprecate TLS cipher suites.
-
-### etcd server
-
-- [`etcd --initial-corrupt-check`](TODO) flag is now stable (`etcd --experimental-initial-corrupt-check` has been  deprecated).
-  - `etcd --initial-corrupt-check=true` by default, to check cluster database hashes before serving client/peer traffic.
-- [`etcd --corrupt-check-time`](TODO) flag is now stable (`etcd --experimental-corrupt-check-time` has been  deprecated).
-  - `etcd --corrupt-check-time=12h` by default, to check cluster database hashes for every 12-hour.
-- Enable TLS 1.13, deprecate TLS cipher suites.
-
-### Go
-
-- Require [*Go 2*](https://blog.golang.org/go2draft).
-
-
-<hr>
-

Dockerfile-release.amd64

@@ -1,8 +1,4 @@
-FROM --platform=linux/amd64 busybox:1.34.1 as source
-FROM --platform=linux/amd64 gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM k8s.gcr.io/build-image/debian-base:buster-v1.4.0
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/

Dockerfile-release.arm64

@@ -1,8 +1,4 @@
-FROM --platform=linux/arm64 busybox:1.34.1 as source
-FROM --platform=linux/arm64 gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM k8s.gcr.io/build-image/debian-base-arm64:buster-v1.4.0
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/

Dockerfile-release.ppc64le

@@ -1,8 +1,4 @@
-FROM --platform=linux/ppc64le busybox:1.34.1 as source
-FROM --platform=linux/ppc64le gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
+FROM k8s.gcr.io/build-image/debian-base-ppc64le:buster-v1.4.0
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/

Dockerfile-release.s390x

@@ -1,9 +1,4 @@
-FROM --platform=linux/s390x busybox:1.34.1 as source
-FROM --platform=linux/s390x gcr.io/distroless/base-debian11
-
-COPY --from=source /bin/sh /bin/sh
-COPY --from=source /bin/mkdir /bin/mkdir
-
+FROM k8s.gcr.io/build-image/debian-base-s390x:buster-v1.4.0
 
 ADD etcd /usr/local/bin/
 ADD etcdctl /usr/local/bin/

Documentation/README.md

@@ -1 +1,6 @@
-The etcd docs are hosted at [etcd.io](https://etcd.io/), and so most files formerly in this directory have moved to the [website](https://github.com/etcd-io/website/) repo.
+# The etcd documentation
+
+etcd is a distributed key-value store designed to reliably and quickly preserve and provide access to critical data. It enables reliable distributed coordination through distributed locking, leader elections, and write barriers. An etcd cluster is intended for high availability and permanent data storage and retrieval.
+
+These documents have moved to the [etcd-io/website repo](https://github.com/etcd-io/website/), and can be viewed live at [https://etcd.io/docs/latest/](https://etcd.io/docs/latest/).
+

Documentation/dev-guide/apispec/swagger/rpc.swagger.json

@@ -2671,7 +2671,7 @@
           "format": "uint64"
         },
         "revision": {
-          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nreceived in this stream are guaranteed to have a higher revision number than the\nheader.revision number.",
+          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nrecieved in this stream are guaranteed to have a higher revision number than the\nheader.revision number.",
           "type": "string",
           "format": "int64"
         }
@@ -2713,10 +2713,6 @@
           "type": "string",
           "format": "uint64",
           "title": "remaining_bytes is the number of blob bytes to be sent after this message"
-        },
-        "version": {
-          "description": "local version of server that created the snapshot.\nIn cluster with binaries with different version, each cluster can return different result.\nInforms which etcd server version should be used when restoring the snapshot.",
-          "type": "string"
         }
       }
     },

Documentation/dev-guide/apispec/swagger/v3election.swagger.json

@@ -203,7 +203,7 @@
         "revision": {
           "type": "string",
           "format": "int64",
-          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nreceived in this stream are guaranteed to have a higher revision number than the\nheader.revision number."
+          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nrecieved in this stream are guaranteed to have a higher revision number than the\nheader.revision number."
         },
         "raft_term": {
           "type": "string",

Documentation/dev-guide/apispec/swagger/v3lock.swagger.json

@@ -95,7 +95,7 @@
         "revision": {
           "type": "string",
           "format": "int64",
-          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nreceived in this stream are guaranteed to have a higher revision number than the\nheader.revision number."
+          "description": "revision is the key-value store revision when the request was applied.\nFor watch progress responses, the header.revision indicates progress. All future events\nrecieved in this stream are guaranteed to have a higher revision number than the\nheader.revision number."
         },
         "raft_term": {
           "type": "string",

MAINTAINERS

@@ -9,11 +9,11 @@
 # Please keep the list sorted.
 
 # MAINTAINERS
-Gyuho Lee <gyuhox@gmail.com> (@gyuho) pkg:*
+Brandon Philips <brandon@ifup.org> (@philips) pkg:*
+Gyuho Lee <gyuhox@gmail.com> <leegyuho@amazon.com> (@gyuho) pkg:*
 Hitoshi Mitake <h.mitake@gmail.com> (@mitake) pkg:*
 Jingyi Hu <jingyih@google.com> (@jingyih) pkg:*
 Joe Betz <jpbetz@google.com> (@jpbetz) pkg:*
-Marek Siarkowicz <siarkowicz@google.com> (@serathius) pkg:*
 Piotr Tabor <ptab@google.com> (@ptabor) pkg:*
 Sahdev Zala <spzala@us.ibm.com> (@spzala) pkg:*
 Sam Batschelet <sbatsche@redhat.com> (@hexfusion) pkg:*
@@ -22,8 +22,3 @@ Xiang Li <xiangli.cs@gmail.com> (@xiang90) pkg:*
 
 Ben Darnell <ben@cockroachlabs.com> (@bdarnell) pkg:go.etcd.io/etcd/raft
 Tobias Grieger <tobias.schottdorf@gmail.com> (@tbg) pkg:go.etcd.io/etcd/raft
-
-# REVIEWERS
-Lili Cosic <cosiclili@gmail.com> (lilic@) pkg:*
-Wilson Wang <wilson.wang@bytedance.com> (wilsonwang371@) pkg:*
-Benjamin Wang <wachao@vmware.com> (ahrtr@) pkg:*

Makefile

@@ -22,7 +22,7 @@ XARGS += rm -r
 
 .PHONY: build
 build:
-	GO_BUILD_FLAGS="-v" ./scripts/build.sh
+	GO_BUILD_FLAGS="-v" ./build.sh
 	./bin/etcd --version
 	./bin/etcdctl version
 	./bin/etcdutl version
@@ -39,7 +39,23 @@ clean:
 	rm -rf ./tests/e2e/default.proxy
 	find ./ -name "127.0.0.1:*" -o -name "localhost:*" -o -name "*.log" -o -name "agent-*" -o -name "*.coverprofile" -o -name "testname-proxy-*" | $(XARGS)
 
-GO_VERSION ?= 1.17.6
+docker-clean:
+	docker images
+	docker image prune --force
+
+docker-start:
+	service docker restart
+
+docker-kill:
+	docker kill `docker ps -q` || true
+
+docker-remove:
+	docker rm --force `docker ps -a -q` || true
+	docker rmi --force `docker images -q` || true
+
+
+
+GO_VERSION ?= 1.16.3
 ETCD_VERSION ?= $(shell git rev-parse --short HEAD || echo "GitNotFound")
 
 TEST_SUFFIX = $(shell date +%s | base64 | head -c 15)
@@ -80,6 +96,31 @@ pull-docker-test:
 	$(info GO_VERSION: $(GO_VERSION))
 	docker pull gcr.io/etcd-development/etcd-test:go$(GO_VERSION)
 
+
+
+# Example:
+#   make build-docker-test
+#   make compile-with-docker-test
+#   make compile-setup-gopath-with-docker-test
+
+compile-with-docker-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker run \
+	  --rm \
+	  --mount type=bind,source=`pwd`,destination=/go/src/go.etcd.io/etcd \
+	  gcr.io/etcd-development/etcd-test:go$(GO_VERSION) \
+	  /bin/bash -c "GO_BUILD_FLAGS=-v GOOS=linux GOARCH=amd64 ./build.sh && ./bin/etcd --version"
+
+compile-setup-gopath-with-docker-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker run \
+	  --rm \
+	  --mount type=bind,source=`pwd`,destination=/etcd \
+	  gcr.io/etcd-development/etcd-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && ETCD_SETUP_GOPATH=1 GO_BUILD_FLAGS=-v GOOS=linux GOARCH=amd64 ./build.sh && ./bin/etcd --version && rm -rf ./gopath"
+
+
+
 # Example:
 #
 # Local machine:
@@ -88,29 +129,39 @@ pull-docker-test:
 #   TEST_OPTS="PASSES='build unit release integration_e2e functional'" make test
 #   TEST_OPTS="PASSES='build grpcproxy'" make test
 #
-# grpc-proxy tests:
-#   TEST_OPTS="PASSES='build grpcproxy'" make test
-#   HOST_TMP_DIR=/tmp TEST_OPTS="PASSES='build grpcproxy'" make test
+# Example (test with docker):
+#   make pull-docker-test
+#   TEST_OPTS="PASSES='fmt'" make docker-test
+#   TEST_OPTS="VERBOSE=2 PASSES='unit'" make docker-test
+#
+# Travis CI (test with docker):
+#   TEST_OPTS="PASSES='fmt bom dep build unit'" make docker-test
+#
+# Semaphore CI (test with docker):
+#   TEST_OPTS="PASSES='build unit release integration_e2e functional'" make docker-test
+#   HOST_TMP_DIR=/tmp TEST_OPTS="PASSES='build unit release integration_e2e functional'" make docker-test
+#   TEST_OPTS="GOARCH=386 PASSES='build unit integration_e2e'" make docker-test
+#
+# grpc-proxy tests (test with docker):
+#   TEST_OPTS="PASSES='build grpcproxy'" make docker-test
+#   HOST_TMP_DIR=/tmp TEST_OPTS="PASSES='build grpcproxy'" make docker-test
 
 .PHONY: test
 test:
 	$(info TEST_OPTS: $(TEST_OPTS))
 	$(info log-file: test-$(TEST_SUFFIX).log)
-	$(TEST_OPTS) ./scripts/test.sh 2>&1 | tee test-$(TEST_SUFFIX).log
-	! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test-$(TEST_SUFFIX).log
+	$(TEST_OPTS) ./test.sh 2>&1 | tee test-$(TEST_SUFFIX).log
+	! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test-$(TEST_SUFFIX).log
 
 test-smoke:
 	$(info log-file: test-$(TEST_SUFFIX).log)
-	PASSES="fmt build unit" ./scripts/test.sh 2<&1 | tee test-$(TEST_SUFFIX).log
+	PASSES="fmt build unit" ./test.sh 2<&1 | tee test-$(TEST_SUFFIX).log
 
 test-full:
 	$(info log-file: test-$(TEST_SUFFIX).log)
-	PASSES="fmt build release unit integration functional e2e grpcproxy" ./scripts/test.sh 2<&1 | tee test-$(TEST_SUFFIX).log
+	PASSES="fmt build release unit integration functional e2e grpcproxy" ./test.sh 2<&1 | tee test-$(TEST_SUFFIX).log
 
-ensure-docker-test-image-exists:
-	make push-docker-test || echo "WARNING: Container Image not found in registry, building locally"; make build-docker-test
-
-docker-test: ensure-docker-test-image-exists
+docker-test:
 	$(info GO_VERSION: $(GO_VERSION))
 	$(info ETCD_VERSION: $(ETCD_VERSION))
 	$(info TEST_OPTS: $(TEST_OPTS))
@@ -122,8 +173,8 @@ docker-test: ensure-docker-test-image-exists
 	  $(TMP_DIR_MOUNT_FLAG) \
 	  --mount type=bind,source=`pwd`,destination=/go/src/go.etcd.io/etcd \
 	  gcr.io/etcd-development/etcd-test:go$(GO_VERSION) \
-	  /bin/bash -c "$(TEST_OPTS) ./scripts/test.sh 2>&1 | tee test-$(TEST_SUFFIX).log"
-	! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test-$(TEST_SUFFIX).log
+	  /bin/bash -c "$(TEST_OPTS) ./test.sh 2>&1 | tee test-$(TEST_SUFFIX).log"
+	! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 test-$(TEST_SUFFIX).log
 
 docker-test-coverage:
 	$(info GO_VERSION: $(GO_VERSION))
@@ -137,10 +188,12 @@ docker-test-coverage:
 	  --mount type=bind,source=`pwd`,destination=/go/src/go.etcd.io/etcd \
 	  gcr.io/etcd-development/etcd-test:go$(GO_VERSION) \
 	  /bin/bash ./scripts/codecov_upload.sh docker-test-coverage-$(TEST_SUFFIX).log \
-	! egrep "(--- FAIL:|FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 docker-test-coverage-$(TEST_SUFFIX).log
+	! egrep "(--- FAIL:|DATA RACE|panic: test timed out|appears to have leaked)" -B50 -A10 docker-test-coverage-$(TEST_SUFFIX).log
+
 
 
 # Example:
+#   make compile-with-docker-test
 #   ETCD_VERSION=v3-test make build-docker-release-main
 #   ETCD_VERSION=v3-test make push-docker-release-main
 #   gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
@@ -163,3 +216,333 @@ build-docker-release-main:
 push-docker-release-main:
 	$(info ETCD_VERSION: $(ETCD_VERSION))
 	docker push gcr.io/etcd-development/etcd:$(ETCD_VERSION)
+
+
+
+# Example:
+#   make build-docker-test
+#   make compile-with-docker-test
+#   make build-docker-static-ip-test
+#
+#   gcloud auth configure-docker
+#   make push-docker-static-ip-test
+#
+#   gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
+#   make pull-docker-static-ip-test
+#
+#   make docker-static-ip-test-certs-run
+#   make docker-static-ip-test-certs-metrics-proxy-run
+
+build-docker-static-ip-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	@sed 's|REPLACE_ME_GO_VERSION|$(GO_VERSION)|g' ./tests/docker-static-ip/Dockerfile > $(TMP_DOCKERFILE)
+	docker build \
+	  --network=host \
+	  --tag gcr.io/etcd-development/etcd-static-ip-test:go$(GO_VERSION) \
+	  --file ./tests/docker-static-ip/Dockerfile \
+	  $(TMP_DOCKERFILE)
+
+push-docker-static-ip-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker push gcr.io/etcd-development/etcd-static-ip-test:go$(GO_VERSION)
+
+pull-docker-static-ip-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker pull gcr.io/etcd-development/etcd-static-ip-test:go$(GO_VERSION)
+
+docker-static-ip-test-certs-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-static-ip/certs,destination=/certs \
+	  gcr.io/etcd-development/etcd-static-ip-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs/run.sh && rm -rf m*.etcd"
+
+docker-static-ip-test-certs-metrics-proxy-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-static-ip/certs-metrics-proxy,destination=/certs-metrics-proxy \
+	  gcr.io/etcd-development/etcd-static-ip-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-metrics-proxy/run.sh && rm -rf m*.etcd"
+
+
+
+# Example:
+#   make build-docker-test
+#   make compile-with-docker-test
+#   make build-docker-dns-test
+#
+#   gcloud auth configure-docker
+#   make push-docker-dns-test
+#
+#   gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
+#   make pull-docker-dns-test
+#
+#   make docker-dns-test-insecure-run
+#   make docker-dns-test-certs-run
+#   make docker-dns-test-certs-gateway-run
+#   make docker-dns-test-certs-wildcard-run
+#   make docker-dns-test-certs-common-name-auth-run
+#   make docker-dns-test-certs-common-name-multi-run
+#   make docker-dns-test-certs-san-dns-run
+
+build-docker-dns-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	@sed 's|REPLACE_ME_GO_VERSION|$(GO_VERSION)|g' ./tests/docker-dns/Dockerfile > $(TMP_DOCKERFILE)
+	docker build \
+	  --network=host \
+	  --tag gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  --file ./tests/docker-dns/Dockerfile \
+	  $(TMP_DOCKERFILE)
+
+	docker run \
+	  --rm \
+	  --dns 127.0.0.1 \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "/etc/init.d/bind9 start && cat /dev/null >/etc/hosts && dig etcd.local"
+
+push-docker-dns-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker push gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION)
+
+pull-docker-dns-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker pull gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION)
+
+docker-dns-test-insecure-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/insecure,destination=/insecure \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /insecure/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs,destination=/certs \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-gateway-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs-gateway,destination=/certs-gateway \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-gateway/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-wildcard-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs-wildcard,destination=/certs-wildcard \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-wildcard/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-common-name-auth-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs-common-name-auth,destination=/certs-common-name-auth \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-common-name-auth/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-common-name-multi-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs-common-name-multi,destination=/certs-common-name-multi \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-common-name-multi/run.sh && rm -rf m*.etcd"
+
+docker-dns-test-certs-san-dns-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns/certs-san-dns,destination=/certs-san-dns \
+	  gcr.io/etcd-development/etcd-dns-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-san-dns/run.sh && rm -rf m*.etcd"
+
+
+# Example:
+#   make build-docker-test
+#   make compile-with-docker-test
+#   make build-docker-dns-srv-test
+#   gcloud auth configure-docker
+#   make push-docker-dns-srv-test
+#   gsutil -m acl ch -u allUsers:R -r gs://artifacts.etcd-development.appspot.com
+#   make pull-docker-dns-srv-test
+#   make docker-dns-srv-test-certs-run
+#   make docker-dns-srv-test-certs-gateway-run
+#   make docker-dns-srv-test-certs-wildcard-run
+
+build-docker-dns-srv-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	@sed 's|REPLACE_ME_GO_VERSION|$(GO_VERSION)|g' > $(TMP_DOCKERFILE)
+	docker build \
+	  --network=host \
+	  --tag gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION) \
+	  --file ./tests/docker-dns-srv/Dockerfile \
+	  $(TMP_DOCKERFILE)
+
+	docker run \
+	  --rm \
+	  --dns 127.0.0.1 \
+	  gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION) \
+	  /bin/bash -c "/etc/init.d/bind9 start && cat /dev/null >/etc/hosts && dig +noall +answer SRV _etcd-client-ssl._tcp.etcd.local && dig +noall +answer SRV _etcd-server-ssl._tcp.etcd.local && dig +noall +answer m1.etcd.local m2.etcd.local m3.etcd.local"
+
+push-docker-dns-srv-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker push gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION)
+
+pull-docker-dns-srv-test:
+	$(info GO_VERSION: $(GO_VERSION))
+	docker pull gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION)
+
+docker-dns-srv-test-certs-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns-srv/certs,destination=/certs \
+	  gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs/run.sh && rm -rf m*.etcd"
+
+docker-dns-srv-test-certs-gateway-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns-srv/certs-gateway,destination=/certs-gateway \
+	  gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-gateway/run.sh && rm -rf m*.etcd"
+
+docker-dns-srv-test-certs-wildcard-run:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info HOST_TMP_DIR: $(HOST_TMP_DIR))
+	$(info TMP_DIR_MOUNT_FLAG: $(TMP_DIR_MOUNT_FLAG))
+	docker run \
+	  --rm \
+	  --tty \
+	  --dns 127.0.0.1 \
+	  $(TMP_DIR_MOUNT_FLAG) \
+	  --mount type=bind,source=`pwd`/bin,destination=/etcd \
+	  --mount type=bind,source=`pwd`/tests/docker-dns-srv/certs-wildcard,destination=/certs-wildcard \
+	  gcr.io/etcd-development/etcd-dns-srv-test:go$(GO_VERSION) \
+	  /bin/bash -c "cd /etcd && /certs-wildcard/run.sh && rm -rf m*.etcd"
+
+
+
+# Example:
+#   make build-functional
+#   make build-docker-functional
+#   make push-docker-functional
+#   make pull-docker-functional
+
+build-functional:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info ETCD_VERSION: $(ETCD_VERSION))
+	./tests/functional/build
+	./bin/etcd-agent -help || true && \
+	  ./bin/etcd-proxy -help || true && \
+	  ./bin/etcd-runner --help || true && \
+	  ./bin/etcd-tester -help || true
+
+build-docker-functional:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info ETCD_VERSION: $(ETCD_VERSION))
+	@sed 's|REPLACE_ME_GO_VERSION|$(GO_VERSION)|g' > $(TMP_DOCKERFILE)
+	docker build \
+	  --network=host \
+	  --tag gcr.io/etcd-development/etcd-functional:go$(GO_VERSION) \
+	  --file ./tests/functional/Dockerfile \
+	  .
+	@mv ./tests/functional/Dockerfile.bak ./tests/functional/Dockerfile
+
+	docker run \
+	  --rm \
+	  gcr.io/etcd-development/etcd-functional:go$(GO_VERSION) \
+	  /bin/bash -c "./bin/etcd --version && \
+	   ./bin/etcd-failpoints --version && \
+	   ./bin/etcdctl version && \
+	   ./bin/etcdutl version && \
+	   ./bin/etcd-agent -help || true && \
+	   ./bin/etcd-proxy -help || true && \
+	   ./bin/etcd-runner --help || true && \
+	   ./bin/etcd-tester -help || true && \
+	   ./bin/benchmark --help || true"
+
+push-docker-functional:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info ETCD_VERSION: $(ETCD_VERSION))
+	docker push gcr.io/etcd-development/etcd-functional:go$(GO_VERSION)
+
+pull-docker-functional:
+	$(info GO_VERSION: $(GO_VERSION))
+	$(info ETCD_VERSION: $(ETCD_VERSION))
+	docker pull gcr.io/etcd-development/etcd-functional:go$(GO_VERSION)

README.md

@@ -1,10 +1,11 @@
 # etcd
 
 [![Go Report Card](https://goreportcard.com/badge/github.com/etcd-io/etcd?style=flat-square)](https://goreportcard.com/report/github.com/etcd-io/etcd)
-[![Coverage](https://codecov.io/gh/etcd-io/etcd/branch/main/graph/badge.svg)](https://codecov.io/gh/etcd-io/etcd)
+[![Coverage](https://codecov.io/gh/etcd-io/etcd/branch/master/graph/badge.svg)](https://codecov.io/gh/etcd-io/etcd)
 [![Tests](https://github.com/etcd-io/etcd/actions/workflows/tests.yaml/badge.svg)](https://github.com/etcd-io/etcd/actions/workflows/tests.yaml)
 [![asset-transparency](https://github.com/etcd-io/etcd/actions/workflows/asset-transparency.yaml/badge.svg)](https://github.com/etcd-io/etcd/actions/workflows/asset-transparency.yaml)
 [![codeql-analysis](https://github.com/etcd-io/etcd/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/etcd-io/etcd/actions/workflows/codeql-analysis.yml)
+[![self-hosted-linux-arm64-graviton2-tests](https://github.com/etcd-io/etcd/actions/workflows/self-hosted-linux-arm64-graviton2-tests.yml/badge.svg)](https://github.com/etcd-io/etcd/actions/workflows/self-hosted-linux-arm64-graviton2-tests.yml)
 [![Docs](https://img.shields.io/badge/docs-latest-green.svg)](https://etcd.io/docs)
 [![Godoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://godoc.org/github.com/etcd-io/etcd)
 [![Releases](https://img.shields.io/github/release/etcd-io/etcd/all.svg?style=flat-square)](https://github.com/etcd-io/etcd/releases)
@@ -40,18 +41,40 @@ etcd contributors and maintainers have monthly (every four weeks) meetings at 11
 
 An initial agenda will be posted to the [shared Google docs][shared-meeting-notes] a day before each meeting, and everyone is welcome to suggest additional topics or other agendas.
 
-Meeting recordings are uploaded to [Etcd YouTube channel].
+[shared-meeting-notes]: https://docs.google.com/document/d/16XEGyPBisZvmmoIHSZzv__LoyOeluC5a4x353CX0SIM/edit
+
+
+Time:
+- [Jan 10th, 2019 11:00 AM video](https://www.youtube.com/watch?v=0Cphtbd1OSc&feature=youtu.be)
+- [Feb 7th, 2019 11:00 AM video](https://youtu.be/U80b--oAlYM)
+- [Mar 7th, 2019 11:00 AM video](https://youtu.be/w9TI5B7D1zg)
+- [Apr 4th, 2019 11:00 AM video](https://youtu.be/oqQR2XH1L_A)
+- [May 2nd, 2019 11:00 AM video](https://youtu.be/wFwQePuDWVw)
+- [May 30th, 2019 11:00 AM video](https://youtu.be/2t1R5NATYG4)
+- [Jul 11th, 2019 11:00 AM video](https://youtu.be/k_FZEipWD6Y)
+- [Jul 25, 2019 11:00 AM video](https://youtu.be/VSUJTACO93I)
+- [Aug 22, 2019 11:00 AM video](https://youtu.be/6IBQ-VxQmuM)
+- [Sep 19, 2019 11:00 AM video](https://youtu.be/SqfxU9DhBOc)
+- Nov 14, 2019 11:00 AM
+- Dec 12, 2019 11:00 AM
+- Jan 09, 2020 11:00 AM
+- Feb 06, 2020 11:00 AM
+- Mar 05, 2020 11:00 AM
+- Apr 02, 2020 11:00 AM
+- Apr 30, 2020 11:00 AM
+- May 28, 2020 11:00 AM
+- Jun 25, 2020 11:00 AM
+- Jul 23, 2020 11:00 AM
+- Aug 20, 2020 11:00 AM
+- Sep 17, 2020 11:00 AM
+- Oct 15, 2020 11:00 AM
+- Nov 12, 2020 11:00 AM
+- Dec 10, 2020 11:00 AM
 
 Join Hangouts Meet: [meet.google.com/umg-nrxn-qvs](https://meet.google.com/umg-nrxn-qvs)
 
 Join by phone: +1 405-792-0633‬ PIN: ‪299 906‬#
 
-[shared-meeting-notes]: https://docs.google.com/document/d/16XEGyPBisZvmmoIHSZzv__LoyOeluC5a4x353CX0SIM/edit
-[Etcd YouTube channel]: https://www.youtube.com/channel/UC7tUWR24I5AR9NMsG-NYBlg
-
-## Maintainers
-
-[MAINTAINERS](MAINTAINERS) strive to shape an inclusive open source project culture where users are heard and contributors feel respected and empowered. MAINTAINERS maintain productive relationships across different companies and disciplines. Read more about [MAINTAINERS role and responsibilities](GOVERNANCE.md#maintainers).
 
 ## Getting started
 
@@ -61,11 +84,11 @@ The easiest way to get etcd is to use one of the pre-built release binaries whic
 
 For more installation guides, please check out [play.etcd.io](http://play.etcd.io) and [operating etcd](https://etcd.io/docs/latest/op-guide).
 
-For those wanting to try the very latest version, [build the latest version of etcd][dl-build] from the `main` branch. This first needs [*Go*](https://golang.org/) installed ([version 1.17+](/go.mod#L3) is required). All development occurs on `main`, including new features and bug fixes. Bug fixes are first targeted at `main` and subsequently ported to release branches, as described in the [branch management][branch-management] guide.
+For those wanting to try the very latest version, [build the latest version of etcd][dl-build] from the `main` branch. This first needs [*Go*](https://golang.org/) installed ([version 1.16+](/go.mod#L3) is required). All development occurs on `main`, including new features and bug fixes. Bug fixes are first targeted at `main` and subsequently ported to release branches, as described in the [branch management][branch-management] guide.
 
 [github-release]: https://github.com/etcd-io/etcd/releases
 [branch-management]: https://etcd.io/docs/latest/branch_management
-[dl-build]: https://etcd.io/docs/latest/install/#build-from-source
+[dl-build]: https://etcd.io/docs/latest/dl-build#build-the-latest-version
 
 ### Running etcd
 
@@ -130,12 +153,6 @@ Follow the steps in [Procfile.learner](./Procfile.learner) to add a learner node
 goreman -f ./Procfile.learner start
 ```
 
-### Install etcd client v3
-
-```bash
-go get go.etcd.io/etcd/client/v3
-```
-
 ### Next steps
 
 Now it's time to dig into the full etcd API and other guides.
@@ -169,7 +186,7 @@ See [CONTRIBUTING](CONTRIBUTING.md) for details on submitting patches and the co
 
 ## Reporting bugs
 
-See [reporting bugs](https://etcd.io/docs/latest/reporting_bugs/) for details about reporting any issues.
+See [reporting bugs](https://etcd.io/docs/latest/reporting-bugs) for details about reporting any issues.
 
 ## Reporting a security vulnerability
 
@@ -187,7 +204,6 @@ These emeritus maintainers dedicated a part of their career to etcd and reviewed
 
 * Fanmin Shi
 * Anthony Romano
-* Brandon Philips
 
 ### License
 

api/etcdserverpb/raft_internal.pb.go

@@ -12,7 +12,6 @@ import (
 	_ "github.com/gogo/protobuf/gogoproto"
 	proto "github.com/golang/protobuf/proto"
 	membershippb "go.etcd.io/etcd/api/v3/membershippb"
-	_ "go.etcd.io/etcd/api/v3/versionpb"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -238,73 +237,70 @@ func init() {
 func init() { proto.RegisterFile("raft_internal.proto", fileDescriptor_b4c9a9be0cfca103) }
 
 var fileDescriptor_b4c9a9be0cfca103 = []byte{
-	// 1054 bytes of a gzipped FileDescriptorProto
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-	0xff, 0x01, 0x00, 0x00, 0xff, 0xff, 0x30, 0x36, 0x53, 0xc6, 0x0b, 0x0b, 0x00, 0x00,
+	// 1003 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x96, 0xd9, 0x72, 0x1b, 0x45,
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+	0xd2, 0xbb, 0x1b, 0xcf, 0xff, 0x6c, 0x5f, 0x79, 0x7e, 0xd1, 0xae, 0x9d, 0x5f, 0xb4, 0x6b, 0x7f,
+	0x5c, 0xb4, 0x6b, 0x5f, 0xff, 0xd5, 0xbe, 0x32, 0x58, 0x54, 0x17, 0xc3, 0x07, 0xff, 0x07, 0x00,
+	0x00, 0xff, 0xff, 0x94, 0x6f, 0x64, 0x0a, 0x98, 0x0a, 0x00, 0x00,
 }
 
 func (m *RequestHeader) Marshal() (dAtA []byte, err error) {

api/etcdserverpb/raft_internal.proto

@@ -4,7 +4,6 @@ package etcdserverpb;
 import "gogoproto/gogo.proto";
 import "etcdserver.proto";
 import "rpc.proto";
-import "etcd/api/versionpb/version.proto";
 import "etcd/api/membershippb/membership.proto";
 
 option (gogoproto.marshaler_all) = true;
@@ -13,20 +12,16 @@ option (gogoproto.unmarshaler_all) = true;
 option (gogoproto.goproto_getters_all) = false;
 
 message RequestHeader {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   uint64 ID = 1;
   // username is a username that is associated with an auth token of gRPC connection
   string username = 2;
   // auth_revision is a revision number of auth.authStore. It is not related to mvcc
-  uint64 auth_revision = 3 [(versionpb.etcd_version_field) = "3.1"];
+  uint64 auth_revision = 3;
 }
 
 // An InternalRaftRequest is the union of all requests which can be
 // sent via raft.
 message InternalRaftRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   RequestHeader header = 100;
   uint64 ID = 1;
 
@@ -43,11 +38,11 @@ message InternalRaftRequest {
 
   AlarmRequest alarm = 10;
 
-  LeaseCheckpointRequest lease_checkpoint = 11 [(versionpb.etcd_version_field) = "3.4"];
+  LeaseCheckpointRequest lease_checkpoint = 11;
 
   AuthEnableRequest auth_enable = 1000;
   AuthDisableRequest auth_disable = 1011;
-  AuthStatusRequest auth_status = 1013 [(versionpb.etcd_version_field) = "3.5"];
+  AuthStatusRequest auth_status = 1013;
 
   InternalAuthenticateRequest authenticate = 1012;
 
@@ -66,9 +61,9 @@ message InternalRaftRequest {
   AuthRoleGrantPermissionRequest auth_role_grant_permission = 1203;
   AuthRoleRevokePermissionRequest auth_role_revoke_permission = 1204;
 
-  membershippb.ClusterVersionSetRequest cluster_version_set = 1300 [(versionpb.etcd_version_field) = "3.5"];
-  membershippb.ClusterMemberAttrSetRequest cluster_member_attr_set = 1301 [(versionpb.etcd_version_field) = "3.5"];
-  membershippb.DowngradeInfoSetRequest  downgrade_info_set = 1302 [(versionpb.etcd_version_field) = "3.5"];
+  membershippb.ClusterVersionSetRequest cluster_version_set = 1300;
+  membershippb.ClusterMemberAttrSetRequest cluster_member_attr_set = 1301;
+  membershippb.DowngradeInfoSetRequest  downgrade_info_set = 1302;
 }
 
 message EmptyResponse {
@@ -78,7 +73,6 @@ message EmptyResponse {
 // InternalAuthenticateRequest has a member that is filled by etcdserver and shouldn't be user-facing.
 // For avoiding misusage the field, we have an internal version of AuthenticateRequest.
 message InternalAuthenticateRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
   string name = 1;
   string password = 2;
 

api/etcdserverpb/rpc.pb.go

@@ -14,7 +14,6 @@ import (
 	proto "github.com/golang/protobuf/proto"
 	authpb "go.etcd.io/etcd/api/v3/authpb"
 	mvccpb "go.etcd.io/etcd/api/v3/mvccpb"
-	_ "go.etcd.io/etcd/api/v3/versionpb"
 	_ "google.golang.org/genproto/googleapis/api/annotations"
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
@@ -277,7 +276,7 @@ type ResponseHeader struct {
 	MemberId uint64 `protobuf:"varint,2,opt,name=member_id,json=memberId,proto3" json:"member_id,omitempty"`
 	// revision is the key-value store revision when the request was applied.
 	// For watch progress responses, the header.revision indicates progress. All future events
-	// received in this stream are guaranteed to have a higher revision number than the
+	// recieved in this stream are guaranteed to have a higher revision number than the
 	// header.revision number.
 	Revision int64 `protobuf:"varint,3,opt,name=revision,proto3" json:"revision,omitempty"`
 	// raft_term is the raft term when the request was applied.
@@ -1793,11 +1792,7 @@ type SnapshotResponse struct {
 	// remaining_bytes is the number of blob bytes to be sent after this message
 	RemainingBytes uint64 `protobuf:"varint,2,opt,name=remaining_bytes,json=remainingBytes,proto3" json:"remaining_bytes,omitempty"`
 	// blob contains the next chunk of the snapshot in the snapshot stream.
-	Blob []byte `protobuf:"bytes,3,opt,name=blob,proto3" json:"blob,omitempty"`
-	// local version of server that created the snapshot.
-	// In cluster with binaries with different version, each cluster can return different result.
-	// Informs which etcd server version should be used when restoring the snapshot.
-	Version              string   `protobuf:"bytes,4,opt,name=version,proto3" json:"version,omitempty"`
+	Blob                 []byte   `protobuf:"bytes,3,opt,name=blob,proto3" json:"blob,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -1857,13 +1852,6 @@ func (m *SnapshotResponse) GetBlob() []byte {
 	return nil
 }
 
-func (m *SnapshotResponse) GetVersion() string {
-	if m != nil {
-		return m.Version
-	}
-	return ""
-}
-
 type WatchRequest struct {
 	// request_union is a request to either create a new watcher or cancel an existing watcher.
 	//
@@ -6166,282 +6154,264 @@ func init() {
 func init() { proto.RegisterFile("rpc.proto", fileDescriptor_77a6da22d6a3feb1) }
 
 var fileDescriptor_77a6da22d6a3feb1 = []byte{
-	// 4393 bytes of a gzipped FileDescriptorProto
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+	0xc6, 0x0f, 0x17, 0xfb, 0x93, 0x36, 0x7e, 0xa4, 0x28, 0x96, 0xb0, 0xf1, 0x1d, 0x7b, 0x40, 0x94,
+	0x63, 0x26, 0x0a, 0x5f, 0x69, 0x68, 0xd3, 0x8f, 0x59, 0xa4, 0x6a, 0x96, 0x86, 0x16, 0x1c, 0x33,
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+	0x75, 0x64, 0xb8, 0xa1, 0x63, 0xb6, 0x94, 0x50, 0xc6, 0x42, 0xef, 0xa6, 0x18, 0x31, 0xf1, 0x49,
+	0xa4, 0xf9, 0xde, 0x6b, 0x72, 0xa7, 0xee, 0x71, 0x6e, 0x7e, 0xb9, 0xc7, 0xff, 0x56, 0x83, 0xe5,
+	0xa4, 0x12, 0x18, 0x4a, 0xc1, 0x49, 0x79, 0x4a, 0x69, 0x6e, 0xbe, 0x2e, 0xfb, 0x74, 0x6b, 0xf9,
+	0xbb, 0xfe, 0x71, 0xfd, 0x5f, 0xbf, 0x5c, 0xd3, 0xfe, 0xe3, 0xcb, 0x35, 0xed, 0xbf, 0xbf, 0x5c,
+	0xd3, 0xfe, 0xee, 0x7f, 0xd6, 0xe6, 0x4e, 0xf3, 0xec, 0x3f, 0x1a, 0x7f, 0xfb, 0x37, 0x01, 0x00,
+	0x00, 0xff, 0xff, 0xee, 0x4f, 0x63, 0x90, 0xed, 0x3c, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -9611,13 +9581,6 @@ func (m *SnapshotResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
-	if len(m.Version) > 0 {
-		i -= len(m.Version)
-		copy(dAtA[i:], m.Version)
-		i = encodeVarintRpc(dAtA, i, uint64(len(m.Version)))
-		i--
-		dAtA[i] = 0x22
-	}
 	if len(m.Blob) > 0 {
 		i -= len(m.Blob)
 		copy(dAtA[i:], m.Blob)
@@ -13550,10 +13513,6 @@ func (m *SnapshotResponse) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovRpc(uint64(l))
 	}
-	l = len(m.Version)
-	if l > 0 {
-		n += 1 + l + sovRpc(uint64(l))
-	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -17906,38 +17865,6 @@ func (m *SnapshotResponse) Unmarshal(dAtA []byte) error {
 				m.Blob = []byte{}
 			}
 			iNdEx = postIndex
-		case 4:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Version", wireType)
-			}
-			var stringLen uint64
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowRpc
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				stringLen |= uint64(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			intStringLen := int(stringLen)
-			if intStringLen < 0 {
-				return ErrInvalidLengthRpc
-			}
-			postIndex := iNdEx + intStringLen
-			if postIndex < 0 {
-				return ErrInvalidLengthRpc
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Version = string(dAtA[iNdEx:postIndex])
-			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipRpc(dAtA[iNdEx:])

api/etcdserverpb/rpc.proto

@@ -4,7 +4,6 @@ package etcdserverpb;
 import "gogoproto/gogo.proto";
 import "etcd/api/mvccpb/kv.proto";
 import "etcd/api/authpb/auth.proto";
-import "etcd/api/versionpb/version.proto";
 
 // for grpc-gateway
 import "google/api/annotations.proto";
@@ -389,15 +388,13 @@ service Auth {
 }
 
 message ResponseHeader {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // cluster_id is the ID of the cluster which sent the response.
   uint64 cluster_id = 1;
   // member_id is the ID of the member which sent the response.
   uint64 member_id = 2;
   // revision is the key-value store revision when the request was applied.
   // For watch progress responses, the header.revision indicates progress. All future events
-  // received in this stream are guaranteed to have a higher revision number than the
+  // recieved in this stream are guaranteed to have a higher revision number than the
   // header.revision number.
   int64 revision = 3;
   // raft_term is the raft term when the request was applied.
@@ -405,21 +402,17 @@ message ResponseHeader {
 }
 
 message RangeRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   enum SortOrder {
-    option (versionpb.etcd_version_enum) = "3.0";
-    NONE = 0; // default, no sorting
-    ASCEND = 1; // lowest target value first
-    DESCEND = 2; // highest target value first
+	NONE = 0; // default, no sorting
+	ASCEND = 1; // lowest target value first
+	DESCEND = 2; // highest target value first
   }
   enum SortTarget {
-    option (versionpb.etcd_version_enum) = "3.0";
-    KEY = 0;
-    VERSION = 1;
-    CREATE = 2;
-    MOD = 3;
-    VALUE = 4;
+	KEY = 0;
+	VERSION = 1;
+	CREATE = 2;
+	MOD = 3;
+	VALUE = 4;
   }
 
   // key is the first key for the range. If range_end is not given, the request only looks up key.
@@ -460,24 +453,22 @@ message RangeRequest {
 
   // min_mod_revision is the lower bound for returned key mod revisions; all keys with
   // lesser mod revisions will be filtered away.
-  int64 min_mod_revision = 10 [(versionpb.etcd_version_field)="3.1"];
+  int64 min_mod_revision = 10;
 
   // max_mod_revision is the upper bound for returned key mod revisions; all keys with
   // greater mod revisions will be filtered away.
-  int64 max_mod_revision = 11 [(versionpb.etcd_version_field)="3.1"];
+  int64 max_mod_revision = 11;
 
   // min_create_revision is the lower bound for returned key create revisions; all keys with
   // lesser create revisions will be filtered away.
-  int64 min_create_revision = 12 [(versionpb.etcd_version_field)="3.1"];
+  int64 min_create_revision = 12;
 
   // max_create_revision is the upper bound for returned key create revisions; all keys with
   // greater create revisions will be filtered away.
-  int64 max_create_revision = 13 [(versionpb.etcd_version_field)="3.1"];
+  int64 max_create_revision = 13;
 }
 
 message RangeResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // kvs is the list of key-value pairs matched by the range request.
   // kvs is empty when count is requested.
@@ -489,8 +480,6 @@ message RangeResponse {
 }
 
 message PutRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // key is the key, in bytes, to put into the key-value store.
   bytes key = 1;
   // value is the value, in bytes, to associate with the key in the key-value store.
@@ -501,28 +490,24 @@ message PutRequest {
 
   // If prev_kv is set, etcd gets the previous key-value pair before changing it.
   // The previous key-value pair will be returned in the put response.
-  bool prev_kv = 4 [(versionpb.etcd_version_field)="3.1"];
+  bool prev_kv = 4;
 
   // If ignore_value is set, etcd updates the key using its current value.
   // Returns an error if the key does not exist.
-  bool ignore_value = 5 [(versionpb.etcd_version_field)="3.2"];
+  bool ignore_value = 5;
 
   // If ignore_lease is set, etcd updates the key using its current lease.
   // Returns an error if the key does not exist.
-  bool ignore_lease = 6 [(versionpb.etcd_version_field)="3.2"];
+  bool ignore_lease = 6;
 }
 
 message PutResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // if prev_kv is set in the request, the previous key-value pair will be returned.
-  mvccpb.KeyValue prev_kv = 2 [(versionpb.etcd_version_field)="3.1"];
+  mvccpb.KeyValue prev_kv = 2;
 }
 
 message DeleteRangeRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // key is the first key to delete in the range.
   bytes key = 1;
   // range_end is the key following the last key to delete for the range [key, range_end).
@@ -534,61 +519,50 @@ message DeleteRangeRequest {
 
   // If prev_kv is set, etcd gets the previous key-value pairs before deleting it.
   // The previous key-value pairs will be returned in the delete response.
-  bool prev_kv = 3 [(versionpb.etcd_version_field)="3.1"];
+  bool prev_kv = 3;
 }
 
 message DeleteRangeResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // deleted is the number of keys deleted by the delete range request.
   int64 deleted = 2;
   // if prev_kv is set in the request, the previous key-value pairs will be returned.
-  repeated mvccpb.KeyValue prev_kvs = 3 [(versionpb.etcd_version_field)="3.1"];
+  repeated mvccpb.KeyValue prev_kvs = 3;
 }
 
 message RequestOp {
-  option (versionpb.etcd_version_msg) = "3.0";
   // request is a union of request types accepted by a transaction.
   oneof request {
     RangeRequest request_range = 1;
     PutRequest request_put = 2;
     DeleteRangeRequest request_delete_range = 3;
-    TxnRequest request_txn = 4 [(versionpb.etcd_version_field)="3.3"];
+    TxnRequest request_txn = 4;
   }
 }
 
 message ResponseOp {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // response is a union of response types returned by a transaction.
   oneof response {
     RangeResponse response_range = 1;
     PutResponse response_put = 2;
     DeleteRangeResponse response_delete_range = 3;
-    TxnResponse response_txn = 4 [(versionpb.etcd_version_field)="3.3"];
+    TxnResponse response_txn = 4;
   }
 }
 
 message Compare {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   enum CompareResult {
-    option (versionpb.etcd_version_enum) = "3.0";
-
     EQUAL = 0;
     GREATER = 1;
     LESS = 2;
-    NOT_EQUAL = 3 [(versionpb.etcd_version_enum_value)="3.1"];
+    NOT_EQUAL = 3;
   }
   enum CompareTarget {
-    option (versionpb.etcd_version_enum) = "3.0";
-
     VERSION = 0;
     CREATE = 1;
     MOD = 2;
     VALUE = 3;
-    LEASE = 4 [(versionpb.etcd_version_enum_value)="3.3"];
+    LEASE = 4;
   }
   // result is logical comparison operation for this comparison.
   CompareResult result = 1;
@@ -606,13 +580,13 @@ message Compare {
     // value is the value of the given key, in bytes.
     bytes value = 7;
     // lease is the lease id of the given key.
-    int64 lease = 8 [(versionpb.etcd_version_field)="3.3"];
+    int64 lease = 8;
     // leave room for more target_union field tags, jump to 64
   }
 
   // range_end compares the given target to all keys in the range [key, range_end).
   // See RangeRequest for more details on key ranges.
-  bytes range_end = 64 [(versionpb.etcd_version_field)="3.3"];
+  bytes range_end = 64;
   // TODO: fill out with most of the rest of RangeRequest fields when needed.
 }
 
@@ -632,8 +606,6 @@ message Compare {
 // true.
 // 3. A list of database operations called f op. Like t op, but executed if guard evaluates to false.
 message TxnRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // compare is a list of predicates representing a conjunction of terms.
   // If the comparisons succeed, then the success requests will be processed in order,
   // and the response will contain their respective responses in order.
@@ -647,8 +619,6 @@ message TxnRequest {
 }
 
 message TxnResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // succeeded is set to true if the compare evaluated to true or false otherwise.
   bool succeeded = 2;
@@ -660,8 +630,6 @@ message TxnResponse {
 // CompactionRequest compacts the key-value store up to a given revision. All superseded keys
 // with a revision less than the compaction revision will be removed.
 message CompactionRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // revision is the key-value store revision for the compaction operation.
   int64 revision = 1;
   // physical is set so the RPC will wait until the compaction is physically
@@ -671,24 +639,18 @@ message CompactionRequest {
 }
 
 message CompactionResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message HashRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message HashKVRequest {
-  option (versionpb.etcd_version_msg) = "3.3";
   // revision is the key-value store revision for the hash operation.
   int64 revision = 1;
 }
 
 message HashKVResponse {
-  option (versionpb.etcd_version_msg) = "3.3";
-
   ResponseHeader header = 1;
   // hash is the hash value computed from the responding member's MVCC keys up to a given revision.
   uint32 hash = 2;
@@ -697,20 +659,15 @@ message HashKVResponse {
 }
 
 message HashResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // hash is the hash value computed from the responding member's KV's backend.
   uint32 hash = 2;
 }
 
 message SnapshotRequest {
-  option (versionpb.etcd_version_msg) = "3.3";
 }
 
 message SnapshotResponse {
-  option (versionpb.etcd_version_msg) = "3.3";
-
   // header has the current key-value store information. The first header in the snapshot
   // stream indicates the point in time of the snapshot.
   ResponseHeader header = 1;
@@ -720,26 +677,18 @@ message SnapshotResponse {
 
   // blob contains the next chunk of the snapshot in the snapshot stream.
   bytes blob = 3;
-
-  // local version of server that created the snapshot.
-  // In cluster with binaries with different version, each cluster can return different result.
-  // Informs which etcd server version should be used when restoring the snapshot.
-  string version = 4 [(versionpb.etcd_version_field)="3.6"];
 }
 
 message WatchRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
   // request_union is a request to either create a new watcher or cancel an existing watcher.
   oneof request_union {
     WatchCreateRequest create_request = 1;
     WatchCancelRequest cancel_request = 2;
-    WatchProgressRequest progress_request = 3 [(versionpb.etcd_version_field)="3.4"];
+    WatchProgressRequest progress_request = 3;
   }
 }
 
 message WatchCreateRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // key is the key to register for watching.
   bytes key = 1;
 
@@ -760,8 +709,6 @@ message WatchCreateRequest {
   bool progress_notify = 4;
 
   enum FilterType {
-    option (versionpb.etcd_version_enum) = "3.1";
-
     // filter out put event.
     NOPUT = 0;
     // filter out delete event.
@@ -769,38 +716,34 @@ message WatchCreateRequest {
   }
 
   // filters filter the events at server side before it sends back to the watcher.
-  repeated FilterType filters = 5 [(versionpb.etcd_version_field)="3.1"];
+  repeated FilterType filters = 5;
 
   // If prev_kv is set, created watcher gets the previous KV before the event happens.
   // If the previous KV is already compacted, nothing will be returned.
-  bool prev_kv = 6 [(versionpb.etcd_version_field)="3.1"];
+  bool prev_kv = 6;
 
   // If watch_id is provided and non-zero, it will be assigned to this watcher.
   // Since creating a watcher in etcd is not a synchronous operation,
   // this can be used ensure that ordering is correct when creating multiple
   // watchers on the same stream. Creating a watcher with an ID already in
   // use on the stream will cause an error to be returned.
-  int64 watch_id = 7 [(versionpb.etcd_version_field)="3.4"];
+  int64 watch_id = 7;
 
   // fragment enables splitting large revisions into multiple watch responses.
-  bool fragment = 8 [(versionpb.etcd_version_field)="3.4"];
+  bool fragment = 8;
 }
 
 message WatchCancelRequest {
-  option (versionpb.etcd_version_msg) = "3.1";
   // watch_id is the watcher id to cancel so that no more events are transmitted.
-  int64 watch_id = 1 [(versionpb.etcd_version_field)="3.1"];
+  int64 watch_id = 1;
 }
 
 // Requests the a watch stream progress status be sent in the watch response stream as soon as
 // possible.
 message WatchProgressRequest {
-  option (versionpb.etcd_version_msg) = "3.4";
 }
 
 message WatchResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // watch_id is the ID of the watcher that corresponds to the response.
   int64 watch_id = 2;
@@ -826,17 +769,15 @@ message WatchResponse {
   int64 compact_revision = 5;
 
   // cancel_reason indicates the reason for canceling the watcher.
-  string cancel_reason = 6 [(versionpb.etcd_version_field)="3.4"];
+  string cancel_reason = 6;
 
   // framgment is true if large watch response was split over multiple responses.
-  bool fragment = 7 [(versionpb.etcd_version_field)="3.4"];
+  bool fragment = 7;
 
   repeated mvccpb.Event events = 11;
 }
 
 message LeaseGrantRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // TTL is the advisory time-to-live in seconds. Expired lease will return -1.
   int64 TTL = 1;
   // ID is the requested ID for the lease. If ID is set to 0, the lessor chooses an ID.
@@ -844,8 +785,6 @@ message LeaseGrantRequest {
 }
 
 message LeaseGrantResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // ID is the lease ID for the granted lease.
   int64 ID = 2;
@@ -855,21 +794,15 @@ message LeaseGrantResponse {
 }
 
 message LeaseRevokeRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // ID is the lease ID to revoke. When the ID is revoked, all associated keys will be deleted.
   int64 ID = 1;
 }
 
 message LeaseRevokeResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message LeaseCheckpoint {
-  option (versionpb.etcd_version_msg) = "3.4";
-
     // ID is the lease ID to checkpoint.
   int64 ID = 1;
 
@@ -878,26 +811,19 @@ message LeaseCheckpoint {
 }
 
 message LeaseCheckpointRequest {
-  option (versionpb.etcd_version_msg) = "3.4";
-
   repeated LeaseCheckpoint checkpoints = 1;
 }
 
 message LeaseCheckpointResponse {
-  option (versionpb.etcd_version_msg) = "3.4";
-
   ResponseHeader header = 1;
 }
 
 message LeaseKeepAliveRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
   // ID is the lease ID for the lease to keep alive.
   int64 ID = 1;
 }
 
 message LeaseKeepAliveResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // ID is the lease ID from the keep alive request.
   int64 ID = 2;
@@ -906,7 +832,6 @@ message LeaseKeepAliveResponse {
 }
 
 message LeaseTimeToLiveRequest {
-  option (versionpb.etcd_version_msg) = "3.1";
   // ID is the lease ID for the lease.
   int64 ID = 1;
   // keys is true to query all the keys attached to this lease.
@@ -914,8 +839,6 @@ message LeaseTimeToLiveRequest {
 }
 
 message LeaseTimeToLiveResponse {
-  option (versionpb.etcd_version_msg) = "3.1";
-
   ResponseHeader header = 1;
   // ID is the lease ID from the keep alive request.
   int64 ID = 2;
@@ -928,26 +851,19 @@ message LeaseTimeToLiveResponse {
 }
 
 message LeaseLeasesRequest {
-  option (versionpb.etcd_version_msg) = "3.3";
 }
 
 message LeaseStatus {
-  option (versionpb.etcd_version_msg) = "3.3";
-
   int64 ID = 1;
   // TODO: int64 TTL = 2;
 }
 
 message LeaseLeasesResponse {
-  option (versionpb.etcd_version_msg) = "3.3";
-
   ResponseHeader header = 1;
   repeated LeaseStatus leases = 2;
 }
 
 message Member {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // ID is the member ID for this member.
   uint64 ID = 1;
   // name is the human-readable name of the member. If the member is not started, the name will be an empty string.
@@ -957,21 +873,17 @@ message Member {
   // clientURLs is the list of URLs the member exposes to clients for communication. If the member is not started, clientURLs will be empty.
   repeated string clientURLs = 4;
   // isLearner indicates if the member is raft learner.
-  bool isLearner = 5 [(versionpb.etcd_version_field)="3.4"];
+  bool isLearner = 5;
 }
 
 message MemberAddRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // peerURLs is the list of URLs the added member will use to communicate with the cluster.
   repeated string peerURLs = 1;
   // isLearner indicates if the added member is raft learner.
-  bool isLearner = 2 [(versionpb.etcd_version_field)="3.4"];
+  bool isLearner = 2;
 }
 
 message MemberAddResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // member is the member information for the added member.
   Member member = 2;
@@ -980,22 +892,17 @@ message MemberAddResponse {
 }
 
 message MemberRemoveRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
   // ID is the member ID of the member to remove.
   uint64 ID = 1;
 }
 
 message MemberRemoveResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // members is a list of all members after removing the member.
   repeated Member members = 2;
 }
 
 message MemberUpdateRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // ID is the member ID of the member to update.
   uint64 ID = 1;
   // peerURLs is the new list of URLs the member will use to communicate with the cluster.
@@ -1003,80 +910,59 @@ message MemberUpdateRequest {
 }
 
 message MemberUpdateResponse{
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // members is a list of all members after updating the member.
-  repeated Member members = 2 [(versionpb.etcd_version_field)="3.1"];
+  repeated Member members = 2;
 }
 
 message MemberListRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
-  bool linearizable = 1 [(versionpb.etcd_version_field)="3.5"];
+  bool linearizable = 1;
 }
 
 message MemberListResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // members is a list of all members associated with the cluster.
   repeated Member members = 2;
 }
 
 message MemberPromoteRequest {
-  option (versionpb.etcd_version_msg) = "3.4";
   // ID is the member ID of the member to promote.
   uint64 ID = 1;
 }
 
 message MemberPromoteResponse {
-  option (versionpb.etcd_version_msg) = "3.4";
-
   ResponseHeader header = 1;
   // members is a list of all members after promoting the member.
   repeated Member members = 2;
 }
 
 message DefragmentRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message DefragmentResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message MoveLeaderRequest {
-  option (versionpb.etcd_version_msg) = "3.3";
   // targetID is the node ID for the new leader.
   uint64 targetID = 1;
 }
 
 message MoveLeaderResponse {
-  option (versionpb.etcd_version_msg) = "3.3";
-
   ResponseHeader header = 1;
 }
 
 enum AlarmType {
-  option (versionpb.etcd_version_enum) = "3.0";
-
 	NONE = 0; // default, used to query if any alarm is active
 	NOSPACE = 1; // space quota is exhausted
-	CORRUPT = 2 [(versionpb.etcd_version_enum_value)="3.3"]; // kv store corruption detected
+	CORRUPT = 2; // kv store corruption detected
 }
 
 message AlarmRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   enum AlarmAction {
-    option (versionpb.etcd_version_enum) = "3.0";
-
-    GET = 0;
-    ACTIVATE = 1;
-    DEACTIVATE = 2;
+	GET = 0;
+	ACTIVATE = 1;
+	DEACTIVATE = 2;
   }
   // action is the kind of alarm request to issue. The action
   // may GET alarm statuses, ACTIVATE an alarm, or DEACTIVATE a
@@ -1090,7 +976,6 @@ message AlarmRequest {
 }
 
 message AlarmMember {
-  option (versionpb.etcd_version_msg) = "3.0";
   // memberID is the ID of the member associated with the raised alarm.
   uint64 memberID = 1;
   // alarm is the type of alarm which has been raised.
@@ -1098,19 +983,13 @@ message AlarmMember {
 }
 
 message AlarmResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // alarms is a list of alarms associated with the alarm request.
   repeated AlarmMember alarms = 2;
 }
 
 message DowngradeRequest {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   enum DowngradeAction {
-    option (versionpb.etcd_version_enum) = "3.5";
-
     VALIDATE = 0;
     ENABLE = 1;
     CANCEL = 2;
@@ -1125,20 +1004,15 @@ message DowngradeRequest {
 }
 
 message DowngradeResponse {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   ResponseHeader header = 1;
   // version is the current cluster version.
   string version = 2;
 }
 
 message StatusRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message StatusResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // version is the cluster protocol version used by the responding member.
   string version = 2;
@@ -1151,69 +1025,55 @@ message StatusResponse {
   // raftTerm is the current raft term of the responding member.
   uint64 raftTerm = 6;
   // raftAppliedIndex is the current raft applied index of the responding member.
-  uint64 raftAppliedIndex = 7 [(versionpb.etcd_version_field)="3.4"];
+  uint64 raftAppliedIndex = 7;
   // errors contains alarm/health information and status.
-  repeated string errors = 8 [(versionpb.etcd_version_field)="3.4"];
+  repeated string errors = 8;
   // dbSizeInUse is the size of the backend database logically in use, in bytes, of the responding member.
-  int64 dbSizeInUse = 9 [(versionpb.etcd_version_field)="3.4"];
+  int64 dbSizeInUse = 9;
   // isLearner indicates if the member is raft learner.
-  bool isLearner = 10 [(versionpb.etcd_version_field)="3.4"];
+  bool isLearner = 10;
 }
 
 message AuthEnableRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message AuthDisableRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message AuthStatusRequest {
-  option (versionpb.etcd_version_msg) = "3.5";
 }
 
 message AuthenticateRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string name = 1;
   string password = 2;
 }
 
 message AuthUserAddRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string name = 1;
   string password = 2;
-  authpb.UserAddOptions options = 3 [(versionpb.etcd_version_field)="3.4"];
-  string hashedPassword = 4 [(versionpb.etcd_version_field)="3.5"];
+  authpb.UserAddOptions options = 3;
+  string hashedPassword = 4;
 }
 
 message AuthUserGetRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string name = 1;
 }
 
 message AuthUserDeleteRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
   // name is the name of the user to delete.
   string name = 1;
 }
 
 message AuthUserChangePasswordRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // name is the name of the user whose password is being changed.
   string name = 1;
   // password is the new password for the user. Note that this field will be removed in the API layer.
   string password = 2;
   // hashedPassword is the new password for the user. Note that this field will be initialized in the API layer.
-  string hashedPassword = 3 [(versionpb.etcd_version_field)="3.5"];
+  string hashedPassword = 3;
 }
 
 message AuthUserGrantRoleRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // user is the name of the user which should be granted a given role.
   string user = 1;
   // role is the name of the role to grant to the user.
@@ -1221,42 +1081,30 @@ message AuthUserGrantRoleRequest {
 }
 
 message AuthUserRevokeRoleRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string name = 1;
   string role = 2;
 }
 
 message AuthRoleAddRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // name is the name of the role to add to the authentication system.
   string name = 1;
 }
 
 message AuthRoleGetRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string role = 1;
 }
 
 message AuthUserListRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message AuthRoleListRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
 }
 
 message AuthRoleDeleteRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string role = 1;
 }
 
 message AuthRoleGrantPermissionRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   // name is the name of the role which will be granted the permission.
   string name = 1;
   // perm is the permission to grant to the role.
@@ -1264,28 +1112,20 @@ message AuthRoleGrantPermissionRequest {
 }
 
 message AuthRoleRevokePermissionRequest {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   string role = 1;
   bytes key = 2;
   bytes range_end = 3;
 }
 
 message AuthEnableResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthDisableResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthStatusResponse {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   ResponseHeader header = 1;
   bool enabled = 2;
   // authRevision is the current revision of auth store
@@ -1293,93 +1133,67 @@ message AuthStatusResponse {
 }
 
 message AuthenticateResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
   // token is an authorized token that can be used in succeeding RPCs
   string token = 2;
 }
 
 message AuthUserAddResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthUserGetResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 
   repeated string roles = 2;
 }
 
 message AuthUserDeleteResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthUserChangePasswordResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthUserGrantRoleResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthUserRevokeRoleResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthRoleAddResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthRoleGetResponse {
-  ResponseHeader header = 1 [(versionpb.etcd_version_field)="3.0"];
+  ResponseHeader header = 1;
 
-  repeated authpb.Permission perm = 2 [(versionpb.etcd_version_field)="3.0"];
+  repeated authpb.Permission perm = 2;
 }
 
 message AuthRoleListResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 
   repeated string roles = 2;
 }
 
 message AuthUserListResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 
   repeated string users = 2;
 }
 
 message AuthRoleDeleteResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthRoleGrantPermissionResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }
 
 message AuthRoleRevokePermissionResponse {
-  option (versionpb.etcd_version_msg) = "3.0";
-
   ResponseHeader header = 1;
 }

api/go.mod

@@ -1,22 +1,14 @@
 module go.etcd.io/etcd/api/v3
 
-go 1.17
+go 1.16
 
 require (
 	github.com/coreos/go-semver v0.3.0
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/protobuf v1.5.2
 	github.com/grpc-ecosystem/grpc-gateway v1.16.0
-	google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1
-	google.golang.org/grpc v1.41.0
-)
-
-require (
-	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
-	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
-	golang.org/x/text v0.3.5 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c
+	google.golang.org/grpc v1.38.0
 )
 
 // Bad imports are sometimes causing attempts to pull that code.

api/go.sum

@@ -1,25 +1,18 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
-github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
@@ -36,7 +29,6 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
@@ -55,13 +47,11 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -69,8 +59,11 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -91,6 +84,7 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -111,8 +105,10 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -124,17 +120,15 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1 h1:b9mVrqYfq3P4bCdaLg1qtBnPzUYgglsIdjZkL/fQVOE=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c h1:wtujag7C+4D6KMoulW9YauvK2lgdvCMS260jsqqBXr0=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.41.0 h1:f+PlOh7QV4iIJkPrx5NQ7qaNGFQ3OTse67yaDHfju4E=
-google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
+google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
+google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -145,14 +139,11 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3 h1:fvjTMHxHEw/mxHbtzPi3JCcKXQRAnQTBRo6YCJSVHKI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

api/membershippb/membership.pb.go

@@ -11,7 +11,6 @@ import (
 
 	_ "github.com/gogo/protobuf/gogoproto"
 	proto "github.com/golang/protobuf/proto"
-	_ "go.etcd.io/etcd/api/v3/versionpb"
 )
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -287,33 +286,30 @@ func init() {
 func init() { proto.RegisterFile("membership.proto", fileDescriptor_949fe0d019050ef5) }
 
 var fileDescriptor_949fe0d019050ef5 = []byte{
-	// 401 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x52, 0xcd, 0xae, 0xd2, 0x40,
-	0x14, 0xbe, 0xd3, 0xde, 0xdc, 0xdb, 0x9e, 0x6b, 0x10, 0x27, 0x24, 0x36, 0xa0, 0xb5, 0x61, 0xc5,
-	0xaa, 0x24, 0x12, 0x36, 0xee, 0x54, 0x58, 0x60, 0xc4, 0xc5, 0x18, 0xdc, 0x92, 0x29, 0x1c, 0xb0,
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-	0x00,
+	// 367 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x92, 0xc1, 0x4e, 0xf2, 0x40,
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+	0xd5, 0x4f, 0x00, 0x00, 0x00, 0xff, 0xff, 0xdc, 0x93, 0x7d, 0x0b, 0x87, 0x02, 0x00, 0x00,
 }
 
 func (m *RaftAttributes) Marshal() (dAtA []byte, err error) {

api/membershippb/membership.proto

@@ -2,7 +2,6 @@ syntax = "proto3";
 package membershippb;
 
 import "gogoproto/gogo.proto";
-import "etcd/api/versionpb/version.proto";
 
 option (gogoproto.marshaler_all) = true;
 option (gogoproto.sizer_all) = true;
@@ -11,8 +10,6 @@ option (gogoproto.goproto_getters_all) = false;
 
 // RaftAttributes represents the raft related attributes of an etcd member.
 message RaftAttributes {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   // peerURLs is the list of peers in the raft cluster.
   repeated string peer_urls = 1;
   // isLearner indicates if the member is raft learner.
@@ -21,36 +18,26 @@ message RaftAttributes {
 
 // Attributes represents all the non-raft related attributes of an etcd member.
 message Attributes {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   string name = 1;
   repeated string client_urls = 2;
 }
 
 message Member {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   uint64 ID = 1;
   RaftAttributes raft_attributes = 2;
   Attributes member_attributes = 3;
 }
 
 message ClusterVersionSetRequest {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   string ver = 1;
 }
 
 message ClusterMemberAttrSetRequest {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   uint64 member_ID = 1;
   Attributes member_attributes = 2;
 }
 
 message DowngradeInfoSetRequest {
-  option (versionpb.etcd_version_msg) = "3.5";
-
   bool enabled = 1;
   string ver = 2;
 }

api/v3rpc/rpctypes/error.go

@@ -21,17 +21,15 @@ import (
 
 // server-side error
 var (
-	ErrGRPCEmptyKey                = status.New(codes.InvalidArgument, "etcdserver: key is not provided").Err()
-	ErrGRPCKeyNotFound             = status.New(codes.InvalidArgument, "etcdserver: key not found").Err()
-	ErrGRPCValueProvided           = status.New(codes.InvalidArgument, "etcdserver: value is provided").Err()
-	ErrGRPCLeaseProvided           = status.New(codes.InvalidArgument, "etcdserver: lease is provided").Err()
-	ErrGRPCTooManyOps              = status.New(codes.InvalidArgument, "etcdserver: too many operations in txn request").Err()
-	ErrGRPCDuplicateKey            = status.New(codes.InvalidArgument, "etcdserver: duplicate key given in txn request").Err()
-	ErrGRPCInvalidClientAPIVersion = status.New(codes.InvalidArgument, "etcdserver: invalid client api version").Err()
-	ErrGRPCInvalidSortOption       = status.New(codes.InvalidArgument, "etcdserver: invalid sort option").Err()
-	ErrGRPCCompacted               = status.New(codes.OutOfRange, "etcdserver: mvcc: required revision has been compacted").Err()
-	ErrGRPCFutureRev               = status.New(codes.OutOfRange, "etcdserver: mvcc: required revision is a future revision").Err()
-	ErrGRPCNoSpace                 = status.New(codes.ResourceExhausted, "etcdserver: mvcc: database space exceeded").Err()
+	ErrGRPCEmptyKey      = status.New(codes.InvalidArgument, "etcdserver: key is not provided").Err()
+	ErrGRPCKeyNotFound   = status.New(codes.InvalidArgument, "etcdserver: key not found").Err()
+	ErrGRPCValueProvided = status.New(codes.InvalidArgument, "etcdserver: value is provided").Err()
+	ErrGRPCLeaseProvided = status.New(codes.InvalidArgument, "etcdserver: lease is provided").Err()
+	ErrGRPCTooManyOps    = status.New(codes.InvalidArgument, "etcdserver: too many operations in txn request").Err()
+	ErrGRPCDuplicateKey  = status.New(codes.InvalidArgument, "etcdserver: duplicate key given in txn request").Err()
+	ErrGRPCCompacted     = status.New(codes.OutOfRange, "etcdserver: mvcc: required revision has been compacted").Err()
+	ErrGRPCFutureRev     = status.New(codes.OutOfRange, "etcdserver: mvcc: required revision is a future revision").Err()
+	ErrGRPCNoSpace       = status.New(codes.ResourceExhausted, "etcdserver: mvcc: database space exceeded").Err()
 
 	ErrGRPCLeaseNotFound    = status.New(codes.NotFound, "etcdserver: requested lease not found").Err()
 	ErrGRPCLeaseExist       = status.New(codes.FailedPrecondition, "etcdserver: lease already exists").Err()
@@ -67,24 +65,23 @@ var (
 	ErrGRPCAuthNotEnabled       = status.New(codes.FailedPrecondition, "etcdserver: authentication is not enabled").Err()
 	ErrGRPCInvalidAuthToken     = status.New(codes.Unauthenticated, "etcdserver: invalid auth token").Err()
 	ErrGRPCInvalidAuthMgmt      = status.New(codes.InvalidArgument, "etcdserver: invalid auth management").Err()
-	ErrGRPCAuthOldRevision      = status.New(codes.InvalidArgument, "etcdserver: revision of auth store is old").Err()
 
 	ErrGRPCNoLeader                   = status.New(codes.Unavailable, "etcdserver: no leader").Err()
 	ErrGRPCNotLeader                  = status.New(codes.FailedPrecondition, "etcdserver: not leader").Err()
 	ErrGRPCLeaderChanged              = status.New(codes.Unavailable, "etcdserver: leader changed").Err()
-	ErrGRPCNotCapable                 = status.New(codes.FailedPrecondition, "etcdserver: not capable").Err()
+	ErrGRPCNotCapable                 = status.New(codes.Unavailable, "etcdserver: not capable").Err()
 	ErrGRPCStopped                    = status.New(codes.Unavailable, "etcdserver: server stopped").Err()
 	ErrGRPCTimeout                    = status.New(codes.Unavailable, "etcdserver: request timed out").Err()
 	ErrGRPCTimeoutDueToLeaderFail     = status.New(codes.Unavailable, "etcdserver: request timed out, possibly due to previous leader failure").Err()
 	ErrGRPCTimeoutDueToConnectionLost = status.New(codes.Unavailable, "etcdserver: request timed out, possibly due to connection lost").Err()
 	ErrGRPCUnhealthy                  = status.New(codes.Unavailable, "etcdserver: unhealthy cluster").Err()
 	ErrGRPCCorrupt                    = status.New(codes.DataLoss, "etcdserver: corrupt cluster").Err()
-	ErrGRPCNotSupportedForLearner     = status.New(codes.FailedPrecondition, "etcdserver: rpc not supported for learner").Err()
+	ErrGPRCNotSupportedForLearner     = status.New(codes.Unavailable, "etcdserver: rpc not supported for learner").Err()
 	ErrGRPCBadLeaderTransferee        = status.New(codes.FailedPrecondition, "etcdserver: bad leader transferee").Err()
 
+	ErrGRPCClusterVersionUnavailable     = status.New(codes.Unavailable, "etcdserver: cluster version not found during downgrade").Err()
 	ErrGRPCWrongDowngradeVersionFormat   = status.New(codes.InvalidArgument, "etcdserver: wrong downgrade target version format").Err()
 	ErrGRPCInvalidDowngradeTargetVersion = status.New(codes.InvalidArgument, "etcdserver: invalid downgrade target version").Err()
-	ErrGRPCClusterVersionUnavailable     = status.New(codes.FailedPrecondition, "etcdserver: cluster version not found during downgrade").Err()
 	ErrGRPCDowngradeInProcess            = status.New(codes.FailedPrecondition, "etcdserver: cluster has a downgrade job in progress").Err()
 	ErrGRPCNoInflightDowngrade           = status.New(codes.FailedPrecondition, "etcdserver: no inflight downgrade job").Err()
 
@@ -97,12 +94,11 @@ var (
 		ErrorDesc(ErrGRPCValueProvided): ErrGRPCValueProvided,
 		ErrorDesc(ErrGRPCLeaseProvided): ErrGRPCLeaseProvided,
 
-		ErrorDesc(ErrGRPCTooManyOps):        ErrGRPCTooManyOps,
-		ErrorDesc(ErrGRPCDuplicateKey):      ErrGRPCDuplicateKey,
-		ErrorDesc(ErrGRPCInvalidSortOption): ErrGRPCInvalidSortOption,
-		ErrorDesc(ErrGRPCCompacted):         ErrGRPCCompacted,
-		ErrorDesc(ErrGRPCFutureRev):         ErrGRPCFutureRev,
-		ErrorDesc(ErrGRPCNoSpace):           ErrGRPCNoSpace,
+		ErrorDesc(ErrGRPCTooManyOps):   ErrGRPCTooManyOps,
+		ErrorDesc(ErrGRPCDuplicateKey): ErrGRPCDuplicateKey,
+		ErrorDesc(ErrGRPCCompacted):    ErrGRPCCompacted,
+		ErrorDesc(ErrGRPCFutureRev):    ErrGRPCFutureRev,
+		ErrorDesc(ErrGRPCNoSpace):      ErrGRPCNoSpace,
 
 		ErrorDesc(ErrGRPCLeaseNotFound):    ErrGRPCLeaseNotFound,
 		ErrorDesc(ErrGRPCLeaseExist):       ErrGRPCLeaseExist,
@@ -135,7 +131,6 @@ var (
 		ErrorDesc(ErrGRPCAuthNotEnabled):       ErrGRPCAuthNotEnabled,
 		ErrorDesc(ErrGRPCInvalidAuthToken):     ErrGRPCInvalidAuthToken,
 		ErrorDesc(ErrGRPCInvalidAuthMgmt):      ErrGRPCInvalidAuthMgmt,
-		ErrorDesc(ErrGRPCAuthOldRevision):      ErrGRPCAuthOldRevision,
 
 		ErrorDesc(ErrGRPCNoLeader):                   ErrGRPCNoLeader,
 		ErrorDesc(ErrGRPCNotLeader):                  ErrGRPCNotLeader,
@@ -147,7 +142,7 @@ var (
 		ErrorDesc(ErrGRPCTimeoutDueToConnectionLost): ErrGRPCTimeoutDueToConnectionLost,
 		ErrorDesc(ErrGRPCUnhealthy):                  ErrGRPCUnhealthy,
 		ErrorDesc(ErrGRPCCorrupt):                    ErrGRPCCorrupt,
-		ErrorDesc(ErrGRPCNotSupportedForLearner):     ErrGRPCNotSupportedForLearner,
+		ErrorDesc(ErrGPRCNotSupportedForLearner):     ErrGPRCNotSupportedForLearner,
 		ErrorDesc(ErrGRPCBadLeaderTransferee):        ErrGRPCBadLeaderTransferee,
 
 		ErrorDesc(ErrGRPCClusterVersionUnavailable):     ErrGRPCClusterVersionUnavailable,
@@ -160,16 +155,15 @@ var (
 
 // client-side error
 var (
-	ErrEmptyKey          = Error(ErrGRPCEmptyKey)
-	ErrKeyNotFound       = Error(ErrGRPCKeyNotFound)
-	ErrValueProvided     = Error(ErrGRPCValueProvided)
-	ErrLeaseProvided     = Error(ErrGRPCLeaseProvided)
-	ErrTooManyOps        = Error(ErrGRPCTooManyOps)
-	ErrDuplicateKey      = Error(ErrGRPCDuplicateKey)
-	ErrInvalidSortOption = Error(ErrGRPCInvalidSortOption)
-	ErrCompacted         = Error(ErrGRPCCompacted)
-	ErrFutureRev         = Error(ErrGRPCFutureRev)
-	ErrNoSpace           = Error(ErrGRPCNoSpace)
+	ErrEmptyKey      = Error(ErrGRPCEmptyKey)
+	ErrKeyNotFound   = Error(ErrGRPCKeyNotFound)
+	ErrValueProvided = Error(ErrGRPCValueProvided)
+	ErrLeaseProvided = Error(ErrGRPCLeaseProvided)
+	ErrTooManyOps    = Error(ErrGRPCTooManyOps)
+	ErrDuplicateKey  = Error(ErrGRPCDuplicateKey)
+	ErrCompacted     = Error(ErrGRPCCompacted)
+	ErrFutureRev     = Error(ErrGRPCFutureRev)
+	ErrNoSpace       = Error(ErrGRPCNoSpace)
 
 	ErrLeaseNotFound    = Error(ErrGRPCLeaseNotFound)
 	ErrLeaseExist       = Error(ErrGRPCLeaseExist)
@@ -201,7 +195,6 @@ var (
 	ErrPermissionNotGranted = Error(ErrGRPCPermissionNotGranted)
 	ErrAuthNotEnabled       = Error(ErrGRPCAuthNotEnabled)
 	ErrInvalidAuthToken     = Error(ErrGRPCInvalidAuthToken)
-	ErrAuthOldRevision      = Error(ErrGRPCAuthOldRevision)
 	ErrInvalidAuthMgmt      = Error(ErrGRPCInvalidAuthMgmt)
 
 	ErrNoLeader                   = Error(ErrGRPCNoLeader)

api/version/version.go

@@ -26,7 +26,7 @@ import (
 var (
 	// MinClusterVersion is the min cluster version this etcd binary is compatible with.
 	MinClusterVersion = "3.0.0"
-	Version           = "3.6.0-alpha.0"
+	Version           = "3.5.0"
 	APIVersion        = "unknown"
 
 	// Git SHA Value will be set during build

api/versionpb/version.pb.go

@@ -1,90 +0,0 @@
-// Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: version.proto
-
-package versionpb
-
-import (
-	fmt "fmt"
-	math "math"
-
-	_ "github.com/gogo/protobuf/gogoproto"
-	protobuf "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
-	proto "github.com/golang/protobuf/proto"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
-
-var E_EtcdVersionMsg = &proto.ExtensionDesc{
-	ExtendedType:  (*protobuf.MessageOptions)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         50000,
-	Name:          "versionpb.etcd_version_msg",
-	Tag:           "bytes,50000,opt,name=etcd_version_msg",
-	Filename:      "version.proto",
-}
-
-var E_EtcdVersionField = &proto.ExtensionDesc{
-	ExtendedType:  (*protobuf.FieldOptions)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         50001,
-	Name:          "versionpb.etcd_version_field",
-	Tag:           "bytes,50001,opt,name=etcd_version_field",
-	Filename:      "version.proto",
-}
-
-var E_EtcdVersionEnum = &proto.ExtensionDesc{
-	ExtendedType:  (*protobuf.EnumOptions)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         50002,
-	Name:          "versionpb.etcd_version_enum",
-	Tag:           "bytes,50002,opt,name=etcd_version_enum",
-	Filename:      "version.proto",
-}
-
-var E_EtcdVersionEnumValue = &proto.ExtensionDesc{
-	ExtendedType:  (*protobuf.EnumValueOptions)(nil),
-	ExtensionType: (*string)(nil),
-	Field:         50003,
-	Name:          "versionpb.etcd_version_enum_value",
-	Tag:           "bytes,50003,opt,name=etcd_version_enum_value",
-	Filename:      "version.proto",
-}
-
-func init() {
-	proto.RegisterExtension(E_EtcdVersionMsg)
-	proto.RegisterExtension(E_EtcdVersionField)
-	proto.RegisterExtension(E_EtcdVersionEnum)
-	proto.RegisterExtension(E_EtcdVersionEnumValue)
-}
-
-func init() { proto.RegisterFile("version.proto", fileDescriptor_7d2c07d79758f814) }
-
-var fileDescriptor_7d2c07d79758f814 = []byte{
-	// 261 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x2d, 0x4b, 0x2d, 0x2a,
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-	0x7e, 0x7a, 0x4e, 0xaa, 0x3e, 0x98, 0x97, 0x54, 0x9a, 0xa6, 0x9f, 0x92, 0x5a, 0x9c, 0x5c, 0x94,
-	0x59, 0x50, 0x92, 0x5f, 0x04, 0x51, 0x61, 0xe5, 0xc7, 0x25, 0x90, 0x5a, 0x92, 0x9c, 0x12, 0x0f,
-	0x35, 0x29, 0x3e, 0xb7, 0x38, 0x5d, 0x48, 0x5e, 0x0f, 0xa2, 0x4d, 0x0f, 0xa6, 0x4d, 0xcf, 0x37,
-	0xb5, 0xb8, 0x38, 0x31, 0x3d, 0xd5, 0xbf, 0xa0, 0x24, 0x33, 0x3f, 0xaf, 0x58, 0xe2, 0x42, 0x1b,
-	0xb3, 0x02, 0xa3, 0x06, 0x67, 0x10, 0x1f, 0x48, 0x6b, 0x18, 0x44, 0xa7, 0x6f, 0x71, 0x7a, 0x07,
-	0x23, 0xa3, 0x55, 0x00, 0x97, 0x10, 0x8a, 0x79, 0x69, 0x99, 0xa9, 0x39, 0x29, 0x42, 0xb2, 0x18,
-	0x26, 0xba, 0x81, 0xc4, 0x61, 0xe6, 0x5d, 0x84, 0x9a, 0x27, 0x80, 0x64, 0x1e, 0x58, 0x01, 0xc8,
-	0x44, 0x5f, 0x2e, 0x41, 0x14, 0x13, 0x53, 0xf3, 0x4a, 0x73, 0x85, 0x64, 0x30, 0x0c, 0x74, 0xcd,
-	0x2b, 0xcd, 0x85, 0x99, 0x77, 0x09, 0x6a, 0x1e, 0x3f, 0x92, 0x79, 0x20, 0x79, 0x90, 0x71, 0xb1,
-	0x5c, 0xe2, 0x18, 0xc6, 0xc5, 0x97, 0x25, 0xe6, 0x94, 0xa6, 0x0a, 0x29, 0x62, 0x35, 0x34, 0x0c,
-	0x24, 0x07, 0x33, 0xf9, 0x32, 0xd4, 0x64, 0x11, 0x34, 0x93, 0xc1, 0x8a, 0x3a, 0x18, 0x19, 0x9d,
-	0x04, 0x4e, 0x3c, 0x92, 0x63, 0xbc, 0xf0, 0x48, 0x8e, 0xf1, 0xc1, 0x23, 0x39, 0xc6, 0x19, 0x8f,
-	0xe5, 0x18, 0x92, 0xd8, 0xc0, 0xa6, 0x19, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff, 0x77, 0x44, 0xe2,
-	0xa4, 0xbc, 0x01, 0x00, 0x00,
-}

api/versionpb/version.proto

@@ -1,28 +0,0 @@
-syntax = "proto3";
-package versionpb;
-
-import "gogoproto/gogo.proto";
-import "google/protobuf/descriptor.proto";
-
-option (gogoproto.marshaler_all) = true;
-option (gogoproto.unmarshaler_all) = true;
-
-// Indicates etcd version that introduced the message, used to determine minimal etcd version required to interpret wal that includes this message.
-extend google.protobuf.MessageOptions {
-  optional string etcd_version_msg = 50000;
-}
-
-// Indicates etcd version that introduced the field, used to determine minimal etcd version required to interpret wal that sets this field.
-extend google.protobuf.FieldOptions {
-  optional string etcd_version_field = 50001;
-}
-
-// Indicates etcd version that introduced the enum, used to determine minimal etcd version required to interpret wal that uses this enum.
-extend google.protobuf.EnumOptions {
-  optional string etcd_version_enum = 50002;
-}
-
-// Indicates etcd version that introduced the enum value, used to determine minimal etcd version required to interpret wal that sets this enum value.
-extend google.protobuf.EnumValueOptions {
-  optional string etcd_version_enum_value = 50003;
-}

bill-of-materials.json

@@ -17,15 +17,6 @@
 			}
 		]
 	},
-	{
-		"project": "github.com/cenkalti/backoff/v4",
-		"licenses": [
-			{
-				"type": "MIT License",
-				"confidence": 1
-			}
-		]
-	},
 	{
 		"project": "github.com/certifi/gocertifi",
 		"licenses": [
@@ -125,6 +116,24 @@
 			}
 		]
 	},
+	{
+		"project": "github.com/etcd-io/gofail/runtime",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
+	{
+		"project": "github.com/form3tech-oss/jwt-go",
+		"licenses": [
+			{
+				"type": "MIT License",
+				"confidence": 0.9891304347826086
+			}
+		]
+	},
 	{
 		"project": "github.com/getsentry/raven-go",
 		"licenses": [
@@ -143,15 +152,6 @@
 			}
 		]
 	},
-	{
-		"project": "github.com/golang-jwt/jwt",
-		"licenses": [
-			{
-				"type": "MIT License",
-				"confidence": 0.9891304347826086
-			}
-		]
-	},
 	{
 		"project": "github.com/golang/groupcache/lru",
 		"licenses": [
@@ -179,15 +179,6 @@
 			}
 		]
 	},
-	{
-		"project": "github.com/google/go-cmp/cmp",
-		"licenses": [
-			{
-				"type": "BSD 3-clause \"New\" or \"Revised\" License",
-				"confidence": 0.9663865546218487
-			}
-		]
-	},
 	{
 		"project": "github.com/gorilla/websocket",
 		"licenses": [
@@ -242,6 +233,15 @@
 			}
 		]
 	},
+	{
+		"project": "github.com/json-iterator/go",
+		"licenses": [
+			{
+				"type": "MIT License",
+				"confidence": 1
+			}
+		]
+	},
 	{
 		"project": "github.com/mattn/go-runewidth",
 		"licenses": [
@@ -260,6 +260,24 @@
 			}
 		]
 	},
+	{
+		"project": "github.com/modern-go/concurrent",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
+	{
+		"project": "github.com/modern-go/reflect2",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
 	{
 		"project": "github.com/olekukonko/tablewriter",
 		"licenses": [
@@ -521,6 +539,15 @@
 			}
 		]
 	},
+	{
+		"project": "go.opentelemetry.io/contrib",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
 	{
 		"project": "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc",
 		"licenses": [
@@ -540,7 +567,7 @@
 		]
 	},
 	{
-		"project": "go.opentelemetry.io/otel/exporters/otlp/otlptrace",
+		"project": "go.opentelemetry.io/otel/exporters/otlp",
 		"licenses": [
 			{
 				"type": "Apache License 2.0",
@@ -549,7 +576,7 @@
 		]
 	},
 	{
-		"project": "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc",
+		"project": "go.opentelemetry.io/otel/metric",
 		"licenses": [
 			{
 				"type": "Apache License 2.0",
@@ -566,6 +593,24 @@
 			}
 		]
 	},
+	{
+		"project": "go.opentelemetry.io/otel/sdk/export/metric",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
+	{
+		"project": "go.opentelemetry.io/otel/sdk/metric",
+		"licenses": [
+			{
+				"type": "Apache License 2.0",
+				"confidence": 1
+			}
+		]
+	},
 	{
 		"project": "go.opentelemetry.io/otel/trace",
 		"licenses": [
@@ -723,15 +768,6 @@
 			}
 		]
 	},
-	{
-		"project": "sigs.k8s.io/json",
-		"licenses": [
-			{
-				"type": "Apache License 2.0",
-				"confidence": 0.9617021276595744
-			}
-		]
-	},
 	{
 		"project": "sigs.k8s.io/yaml",
 		"licenses": [

build

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+echo -e "\\e[91mDEPRECATED!!! Use build.sh script instead.\\e[0m\\n"
+sleep 1
+
+source ./build.sh

build.sh

@@ -18,7 +18,7 @@ GO_BUILD_ENV=("CGO_ENABLED=0" "GO_BUILD_FLAGS=${GO_BUILD_FLAGS}" "GOOS=${GOOS}"
 toggle_failpoints() {
   mode="$1"
   if command -v gofail >/dev/null 2>&1; then
-    run gofail "$mode" server/etcdserver/ server/storage/backend/
+    run gofail "$mode" server/etcdserver/ server/mvcc/backend/
   elif [[ "$mode" != "disable" ]]; then
     log_error "FAILPOINTS set but gofail not found"
     exit 1
@@ -100,11 +100,26 @@ tools_build() {
 }
 
 tests_build() {
-  out=${BINDIR:-./bin}
-  out=$(readlink -m "$out")
-  out="${out}/functional/cmd"
-  mkdir -p "${out}"
-  BINDIR="${out}" run ./tests/functional/build.sh || return 2
+  out="bin"
+  if [[ -n "${BINDIR}" ]]; then out="${BINDIR}"; fi
+  tools_path="
+    functional/cmd/etcd-agent
+    functional/cmd/etcd-proxy
+    functional/cmd/etcd-runner
+    functional/cmd/etcd-tester"
+  (
+    cd tests || exit 2
+    for tool in ${tools_path}; do
+      echo "Building" "'${tool}'"...
+      run rm -f "../${out}/${tool}"
+
+      # shellcheck disable=SC2086
+      run env CGO_ENABLED=0 GO_BUILD_FLAGS="${GO_BUILD_FLAGS}" go build ${GO_BUILD_FLAGS} \
+        -installsuffix=cgo \
+        "-ldflags='${GO_LDFLAGS[*]}'" \
+        -o="../${out}/${tool}" "./${tool}" || return 2
+    done
+  ) || return 2
 }
 
 toggle_failpoints_default

client/pkg/fileutil/fileutil.go

@@ -17,6 +17,7 @@ package fileutil
 import (
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -35,7 +36,7 @@ func IsDirWriteable(dir string) error {
 	if err != nil {
 		return err
 	}
-	if err := os.WriteFile(f, []byte(""), PrivateFileMode); err != nil {
+	if err := ioutil.WriteFile(f, []byte(""), PrivateFileMode); err != nil {
 		return err
 	}
 	return os.Remove(f)
@@ -43,12 +44,16 @@ func IsDirWriteable(dir string) error {
 
 // TouchDirAll is similar to os.MkdirAll. It creates directories with 0700 permission if any directory
 // does not exists. TouchDirAll also ensures the given directory is writable.
-func TouchDirAll(lg *zap.Logger, dir string) error {
+func TouchDirAll(dir string) error {
 	// If path is already a directory, MkdirAll does nothing and returns nil, so,
 	// first check if dir exist with an expected permission mode.
 	if Exist(dir) {
 		err := CheckDirPermission(dir, PrivateDirMode)
 		if err != nil {
+			lg, _ := zap.NewProduction()
+			if lg == nil {
+				lg = zap.NewExample()
+			}
 			lg.Warn("check file permission", zap.Error(err))
 		}
 	} else {
@@ -65,8 +70,8 @@ func TouchDirAll(lg *zap.Logger, dir string) error {
 
 // CreateDirAll is similar to TouchDirAll but returns error
 // if the deepest directory was not empty.
-func CreateDirAll(lg *zap.Logger, dir string) error {
-	err := TouchDirAll(lg, dir)
+func CreateDirAll(dir string) error {
+	err := TouchDirAll(dir)
 	if err == nil {
 		var ns []string
 		ns, err = ReadDir(dir)

client/pkg/fileutil/fileutil_test.go

@@ -17,6 +17,7 @@ package fileutil
 import (
 	"fmt"
 	"io"
+	"io/ioutil"
 	"math/rand"
 	"os"
 	"os/user"
@@ -30,11 +31,15 @@ import (
 )
 
 func TestIsDirWriteable(t *testing.T) {
-	tmpdir := t.TempDir()
-	if err := IsDirWriteable(tmpdir); err != nil {
+	tmpdir, err := ioutil.TempDir("", "")
+	if err != nil {
+		t.Fatalf("unexpected ioutil.TempDir error: %v", err)
+	}
+	defer os.RemoveAll(tmpdir)
+	if err = IsDirWriteable(tmpdir); err != nil {
 		t.Fatalf("unexpected IsDirWriteable error: %v", err)
 	}
-	if err := os.Chmod(tmpdir, 0444); err != nil {
+	if err = os.Chmod(tmpdir, 0444); err != nil {
 		t.Fatalf("unexpected os.Chmod error: %v", err)
 	}
 	me, err := user.Current()
@@ -55,18 +60,22 @@ func TestIsDirWriteable(t *testing.T) {
 }
 
 func TestCreateDirAll(t *testing.T) {
-	tmpdir := t.TempDir()
+	tmpdir, err := ioutil.TempDir(os.TempDir(), "foo")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpdir)
 
 	tmpdir2 := filepath.Join(tmpdir, "testdir")
-	if err := CreateDirAll(zaptest.NewLogger(t), tmpdir2); err != nil {
+	if err = CreateDirAll(tmpdir2); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := os.WriteFile(filepath.Join(tmpdir2, "text.txt"), []byte("test text"), PrivateFileMode); err != nil {
+	if err = ioutil.WriteFile(filepath.Join(tmpdir2, "text.txt"), []byte("test text"), PrivateFileMode); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := CreateDirAll(zaptest.NewLogger(t), tmpdir2); err == nil || !strings.Contains(err.Error(), "to be empty, got") {
+	if err = CreateDirAll(tmpdir2); err == nil || !strings.Contains(err.Error(), "to be empty, got") {
 		t.Fatalf("unexpected error %v", err)
 	}
 }
@@ -82,7 +91,7 @@ func TestExist(t *testing.T) {
 		t.Fatalf("expected Exist true, got %v", Exist(fdir))
 	}
 
-	f, err := os.CreateTemp(os.TempDir(), "fileutil")
+	f, err := ioutil.TempFile(os.TempDir(), "fileutil")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -99,13 +108,17 @@ func TestExist(t *testing.T) {
 }
 
 func TestDirEmpty(t *testing.T) {
-	dir := t.TempDir()
+	dir, err := ioutil.TempDir(os.TempDir(), "empty_dir")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
 
 	if !DirEmpty(dir) {
 		t.Fatalf("expected DirEmpty true, got %v", DirEmpty(dir))
 	}
 
-	file, err := os.CreateTemp(dir, "new_file")
+	file, err := ioutil.TempFile(dir, "new_file")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -120,7 +133,7 @@ func TestDirEmpty(t *testing.T) {
 }
 
 func TestZeroToEnd(t *testing.T) {
-	f, err := os.CreateTemp(os.TempDir(), "fileutil")
+	f, err := ioutil.TempFile(os.TempDir(), "fileutil")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -165,15 +178,19 @@ func TestZeroToEnd(t *testing.T) {
 }
 
 func TestDirPermission(t *testing.T) {
-	tmpdir := t.TempDir()
+	tmpdir, err := ioutil.TempDir(os.TempDir(), "foo")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpdir)
 
 	tmpdir2 := filepath.Join(tmpdir, "testpermission")
 	// create a new dir with 0700
-	if err := CreateDirAll(zaptest.NewLogger(t), tmpdir2); err != nil {
+	if err = CreateDirAll(tmpdir2); err != nil {
 		t.Fatal(err)
 	}
 	// check dir permission with mode different than created dir
-	if err := CheckDirPermission(tmpdir2, 0600); err == nil {
+	if err = CheckDirPermission(tmpdir2, 0600); err == nil {
 		t.Errorf("expected error, got nil")
 	}
 }
@@ -181,12 +198,12 @@ func TestDirPermission(t *testing.T) {
 func TestRemoveMatchFile(t *testing.T) {
 	tmpdir := t.TempDir()
 	defer os.RemoveAll(tmpdir)
-	f, err := os.CreateTemp(tmpdir, "tmp")
+	f, err := ioutil.TempFile(tmpdir, "tmp")
 	if err != nil {
 		t.Fatal(err)
 	}
 	f.Close()
-	f, err = os.CreateTemp(tmpdir, "foo.tmp")
+	f, err = ioutil.TempFile(tmpdir, "foo.tmp")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -206,7 +223,7 @@ func TestRemoveMatchFile(t *testing.T) {
 		t.Errorf("expected exist 1 files, got %d", len(fnames))
 	}
 
-	f, err = os.CreateTemp(tmpdir, "tmp")
+	f, err = ioutil.TempFile(tmpdir, "tmp")
 	if err != nil {
 		t.Fatal(err)
 	}

client/pkg/fileutil/lock_test.go

@@ -15,13 +15,14 @@
 package fileutil
 
 import (
+	"io/ioutil"
 	"os"
 	"testing"
 	"time"
 )
 
 func TestLockAndUnlock(t *testing.T) {
-	f, err := os.CreateTemp("", "lock")
+	f, err := ioutil.TempFile("", "lock")
 	if err != nil {
 		t.Fatal(err)
 	}

client/pkg/fileutil/lock_windows.go

@@ -22,18 +22,31 @@ import (
 	"fmt"
 	"os"
 	"syscall"
-
-	"golang.org/x/sys/windows"
+	"unsafe"
 )
 
-var errLocked = errors.New("the process cannot access the file because another process has locked a portion of the file")
+var (
+	modkernel32    = syscall.NewLazyDLL("kernel32.dll")
+	procLockFileEx = modkernel32.NewProc("LockFileEx")
+
+	errLocked = errors.New("the process cannot access the file because another process has locked a portion of the file")
+)
+
+const (
+	// https://msdn.microsoft.com/en-us/library/windows/desktop/aa365203(v=vs.85).aspx
+	LOCKFILE_EXCLUSIVE_LOCK   = 2
+	LOCKFILE_FAIL_IMMEDIATELY = 1
+
+	// see https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx
+	errLockViolation syscall.Errno = 0x21
+)
 
 func TryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
 	f, err := open(path, flag, perm)
 	if err != nil {
 		return nil, err
 	}
-	if err := lockFile(windows.Handle(f.Fd()), windows.LOCKFILE_FAIL_IMMEDIATELY); err != nil {
+	if err := lockFile(syscall.Handle(f.Fd()), LOCKFILE_FAIL_IMMEDIATELY); err != nil {
 		f.Close()
 		return nil, err
 	}
@@ -45,7 +58,7 @@ func LockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
 	if err != nil {
 		return nil, err
 	}
-	if err := lockFile(windows.Handle(f.Fd()), 0); err != nil {
+	if err := lockFile(syscall.Handle(f.Fd()), 0); err != nil {
 		f.Close()
 		return nil, err
 	}
@@ -82,17 +95,32 @@ func open(path string, flag int, perm os.FileMode) (*os.File, error) {
 	return os.NewFile(uintptr(fd), path), nil
 }
 
-func lockFile(fd windows.Handle, flags uint32) error {
-	if fd == windows.InvalidHandle {
+func lockFile(fd syscall.Handle, flags uint32) error {
+	var flag uint32 = LOCKFILE_EXCLUSIVE_LOCK
+	flag |= flags
+	if fd == syscall.InvalidHandle {
 		return nil
 	}
-	err := windows.LockFileEx(fd, flags|windows.LOCKFILE_EXCLUSIVE_LOCK, 0, 1, 0, &windows.Overlapped{})
+	err := lockFileEx(fd, flag, 1, 0, &syscall.Overlapped{})
 	if err == nil {
 		return nil
 	} else if err.Error() == errLocked.Error() {
 		return ErrLocked
-	} else if err != windows.ERROR_LOCK_VIOLATION {
+	} else if err != errLockViolation {
 		return err
 	}
 	return nil
 }
+
+func lockFileEx(h syscall.Handle, flags, locklow, lockhigh uint32, ol *syscall.Overlapped) (err error) {
+	var reserved uint32 = 0
+	r1, _, e1 := syscall.Syscall6(procLockFileEx.Addr(), 6, uintptr(h), uintptr(flags), uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol)))
+	if r1 == 0 {
+		if e1 != 0 {
+			err = error(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return err
+}

client/pkg/fileutil/preallocate_test.go

@@ -15,6 +15,7 @@
 package fileutil
 
 import (
+	"io/ioutil"
 	"os"
 	"testing"
 )
@@ -62,9 +63,13 @@ func testPreallocateFixed(t *testing.T, f *os.File) {
 }
 
 func runPreallocTest(t *testing.T, test func(*testing.T, *os.File)) {
-	p := t.TempDir()
+	p, err := ioutil.TempDir(os.TempDir(), "preallocateTest")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(p)
 
-	f, err := os.CreateTemp(p, "")
+	f, err := ioutil.TempFile(p, "")
 	if err != nil {
 		t.Fatal(err)
 	}

client/pkg/fileutil/purge_test.go

@@ -16,6 +16,7 @@ package fileutil
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -26,13 +27,17 @@ import (
 )
 
 func TestPurgeFile(t *testing.T) {
-	dir := t.TempDir()
+	dir, err := ioutil.TempDir("", "purgefile")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
 
 	// minimal file set
 	for i := 0; i < 3; i++ {
 		f, ferr := os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", i)))
 		if ferr != nil {
-			t.Fatal(ferr)
+			t.Fatal(err)
 		}
 		f.Close()
 	}
@@ -52,7 +57,7 @@ func TestPurgeFile(t *testing.T) {
 		go func(n int) {
 			f, ferr := os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", n)))
 			if ferr != nil {
-				t.Error(ferr)
+				t.Error(err)
 			}
 			f.Close()
 		}(i)
@@ -88,11 +93,15 @@ func TestPurgeFile(t *testing.T) {
 }
 
 func TestPurgeFileHoldingLockFile(t *testing.T) {
-	dir := t.TempDir()
+	dir, err := ioutil.TempDir("", "purgefile")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
 
 	for i := 0; i < 10; i++ {
 		var f *os.File
-		f, err := os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", i)))
+		f, err = os.Create(filepath.Join(dir, fmt.Sprintf("%d.test", i)))
 		if err != nil {
 			t.Fatal(err)
 		}

client/pkg/fileutil/read_dir_test.go

@@ -15,6 +15,7 @@
 package fileutil
 
 import (
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -22,7 +23,11 @@ import (
 )
 
 func TestReadDir(t *testing.T) {
-	tmpdir := t.TempDir()
+	tmpdir, err := ioutil.TempDir("", "")
+	defer os.RemoveAll(tmpdir)
+	if err != nil {
+		t.Fatalf("unexpected ioutil.TempDir error: %v", err)
+	}
 
 	files := []string{"def", "abc", "xyz", "ghi"}
 	for _, f := range files {

client/pkg/go.mod

@@ -1,18 +1,9 @@
 module go.etcd.io/etcd/client/pkg/v3
 
-go 1.17
+go 1.16
 
 require (
 	github.com/coreos/go-systemd/v22 v22.3.2
-	github.com/stretchr/testify v1.7.0
 	go.uber.org/zap v1.17.0
-	golang.org/x/sys v0.0.0-20210603125802-9665404d3644
-)
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	go.uber.org/atomic v1.7.0 // indirect
-	go.uber.org/multierr v1.6.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57
 )

client/pkg/go.sum

@@ -18,9 +18,8 @@ go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/zap v1.17.0 h1:MTjgFu6ZLKvY6Pvaqk97GlxNBuMpV4Hy/3P6tRGlI2U=
 go.uber.org/zap v1.17.0/go.mod h1:MXVU+bhUf/A7Xi2HNOnopQOrmycQ5Ih87HtOu4q5SSo=
-golang.org/x/sys v0.0.0-20210603125802-9665404d3644 h1:CA1DEQ4NdKphKeL70tvsWNdT5oFh1lOjihRcEDROi0I=
-golang.org/x/sys v0.0.0-20210603125802-9665404d3644/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57 h1:F5Gozwx4I1xtr/sr/8CFbb57iKi3297KFs0QDbGN60A=
+golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

client/pkg/logutil/log_format.go

@@ -1,38 +0,0 @@
-// Copyright 2019 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package logutil
-
-import "fmt"
-
-const (
-	JsonLogFormat    = "json"
-	ConsoleLogFormat = "console"
-)
-
-var DefaultLogFormat = JsonLogFormat
-
-// ConvertToZapFormat converts and validated log format string.
-func ConvertToZapFormat(format string) (string, error) {
-	switch format {
-	case ConsoleLogFormat:
-		return ConsoleLogFormat, nil
-	case JsonLogFormat:
-		return JsonLogFormat, nil
-	case "":
-		return DefaultLogFormat, nil
-	default:
-		return "", fmt.Errorf("unknown log format: %s, supported values json, console", format)
-	}
-}

client/pkg/logutil/log_format_test.go

@@ -1,45 +0,0 @@
-// Copyright 2019 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package logutil
-
-import (
-	"testing"
-)
-
-func TestLogFormat(t *testing.T) {
-	tests := []struct {
-		given       string
-		want        string
-		errExpected bool
-	}{
-		{"json", JsonLogFormat, false},
-		{"console", ConsoleLogFormat, false},
-		{"", JsonLogFormat, false},
-		{"konsole", "", true},
-	}
-
-	for i, tt := range tests {
-		got, err := ConvertToZapFormat(tt.given)
-		if got != tt.want {
-			t.Errorf("#%d: ConvertToZapFormat failure: want=%v, got=%v", i, tt.want, got)
-		}
-
-		if err != nil {
-			if !tt.errExpected {
-				t.Errorf("#%d: ConvertToZapFormat unexpected error: %v", i, err)
-			}
-		}
-	}
-}

client/pkg/logutil/zap.go

@@ -31,7 +31,7 @@ var DefaultZapLoggerConfig = zap.Config{
 		Thereafter: 100,
 	},
 
-	Encoding: DefaultLogFormat,
+	Encoding: "json",
 
 	// copied from "zap.NewProductionEncoderConfig" with some updates
 	EncoderConfig: zapcore.EncoderConfig{

client/pkg/srv/srv.go

@@ -106,10 +106,9 @@ func GetClient(service, domain string, serviceName string) (*SRVClients, error)
 			return err
 		}
 		for _, srv := range addrs {
-			shortHost := strings.TrimSuffix(srv.Target, ".")
 			urls = append(urls, &url.URL{
 				Scheme: scheme,
-				Host:   net.JoinHostPort(shortHost, fmt.Sprintf("%d", srv.Port)),
+				Host:   net.JoinHostPort(srv.Target, fmt.Sprintf("%d", srv.Port)),
 			})
 		}
 		srvs = append(srvs, addrs...)

client/pkg/srv/srv_test.go

@@ -226,8 +226,8 @@ func TestSRVDiscover(t *testing.T) {
 		},
 		{
 			[]*net.SRV{
-				{Target: "a.example.com.", Port: 2480},
-				{Target: "b.example.com.", Port: 2480},
+				{Target: "a.example.com", Port: 2480},
+				{Target: "b.example.com", Port: 2480},
 				{Target: "c.example.com", Port: 2480},
 			},
 			[]*net.SRV{},

client/pkg/testutil/assert.go

@@ -15,23 +15,30 @@
 package testutil
 
 import (
+	"fmt"
 	"reflect"
 	"testing"
-
-	"github.com/stretchr/testify/assert"
 )
 
-func copyToInterface(msg ...string) []interface{} {
-	newMsg := make([]interface{}, len(msg))
-	for i, v := range msg {
-		newMsg[i] = v
+func AssertEqual(t *testing.T, e, a interface{}, msg ...string) {
+	t.Helper()
+	if (e == nil || a == nil) && (isNil(e) && isNil(a)) {
+		return
 	}
-	return newMsg
+	if reflect.DeepEqual(e, a) {
+		return
+	}
+	s := ""
+	if len(msg) > 1 {
+		s = msg[0] + ": "
+	}
+	s = fmt.Sprintf("%sexpected %+v, got %+v", s, e, a)
+	FatalStack(t, s)
 }
 
 func AssertNil(t *testing.T, v interface{}) {
 	t.Helper()
-	assert.Nil(t, v)
+	AssertEqual(t, nil, v)
 }
 
 func AssertNotNil(t *testing.T, v interface{}) {
@@ -43,14 +50,12 @@ func AssertNotNil(t *testing.T, v interface{}) {
 
 func AssertTrue(t *testing.T, v bool, msg ...string) {
 	t.Helper()
-	newMsg := copyToInterface(msg...)
-	assert.Equal(t, true, v, newMsg)
+	AssertEqual(t, true, v, msg...)
 }
 
 func AssertFalse(t *testing.T, v bool, msg ...string) {
 	t.Helper()
-	newMsg := copyToInterface(msg...)
-	assert.Equal(t, false, v, newMsg)
+	AssertEqual(t, false, v, msg...)
 }
 
 func isNil(v interface{}) bool {

client/pkg/testutil/testingtb.go

@@ -15,6 +15,7 @@
 package testutil
 
 import (
+	"io/ioutil"
 	"log"
 	"os"
 )
@@ -111,7 +112,7 @@ func (t *testingTBProthesis) Name() string {
 }
 
 func (t *testingTBProthesis) TempDir() string {
-	dir, err := os.MkdirTemp("", t.name)
+	dir, err := ioutil.TempDir("", t.name)
 	if err != nil {
 		t.Fatal(err)
 	}

client/pkg/tlsutil/tlsutil.go

@@ -18,7 +18,7 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/pem"
-	"os"
+	"io/ioutil"
 )
 
 // NewCertPool creates x509 certPool with provided CA files.
@@ -26,7 +26,7 @@ func NewCertPool(CAFiles []string) (*x509.CertPool, error) {
 	certPool := x509.NewCertPool()
 
 	for _, CAFile := range CAFiles {
-		pemByte, err := os.ReadFile(CAFile)
+		pemByte, err := ioutil.ReadFile(CAFile)
 		if err != nil {
 			return nil, err
 		}
@@ -51,12 +51,12 @@ func NewCertPool(CAFiles []string) (*x509.CertPool, error) {
 
 // NewCert generates TLS cert by using the given cert,key and parse function.
 func NewCert(certfile, keyfile string, parseFunc func([]byte, []byte) (tls.Certificate, error)) (*tls.Certificate, error) {
-	cert, err := os.ReadFile(certfile)
+	cert, err := ioutil.ReadFile(certfile)
 	if err != nil {
 		return nil, err
 	}
 
-	key, err := os.ReadFile(keyfile)
+	key, err := ioutil.ReadFile(keyfile)
 	if err != nil {
 		return nil, err
 	}

client/pkg/transport/keepalive_listener_test.go

@@ -49,10 +49,11 @@ func TestNewKeepAliveListener(t *testing.T) {
 	}
 
 	// tls
-	tlsinfo, err := createSelfCert(t)
+	tlsinfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create tmpfile: %v", err)
 	}
+	defer del()
 	tlsInfo := TLSInfo{CertFile: tlsinfo.CertFile, KeyFile: tlsinfo.KeyFile}
 	tlsInfo.parseFunc = fakeCertificateParserFunc(tls.Certificate{}, nil)
 	tlscfg, err := tlsInfo.ServerConfig()

client/pkg/transport/listener.go

@@ -192,7 +192,7 @@ func SelfCert(lg *zap.Logger, dirpath string, hosts []string, selfSignedCertVali
 		)
 		return
 	}
-	err = fileutil.TouchDirAll(lg, dirpath)
+	err = fileutil.TouchDirAll(dirpath)
 	if err != nil {
 		if info.Logger != nil {
 			info.Logger.Warn(

client/pkg/transport/listener_opts.go

@@ -1,17 +1,3 @@
-// Copyright 2021 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
 package transport
 
 import (

client/pkg/transport/listener_test.go

@@ -18,6 +18,7 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"errors"
+	"io/ioutil"
 	"net"
 	"net/http"
 	"os"
@@ -28,17 +29,20 @@ import (
 	"go.uber.org/zap/zaptest"
 )
 
-func createSelfCert(t *testing.T, hosts ...string) (*TLSInfo, error) {
-	return createSelfCertEx(t, "127.0.0.1")
+func createSelfCert(hosts ...string) (*TLSInfo, func(), error) {
+	return createSelfCertEx("127.0.0.1")
 }
 
-func createSelfCertEx(t *testing.T, host string, additionalUsages ...x509.ExtKeyUsage) (*TLSInfo, error) {
-	d := t.TempDir()
+func createSelfCertEx(host string, additionalUsages ...x509.ExtKeyUsage) (*TLSInfo, func(), error) {
+	d, terr := ioutil.TempDir("", "etcd-test-tls-")
+	if terr != nil {
+		return nil, nil, terr
+	}
 	info, err := SelfCert(zap.NewExample(), d, []string{host + ":0"}, 1, additionalUsages...)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return &info, nil
+	return &info, func() { os.RemoveAll(d) }, nil
 }
 
 func fakeCertificateParserFunc(cert tls.Certificate, err error) func(certPEMBlock, keyPEMBlock []byte) (tls.Certificate, error) {
@@ -50,18 +54,20 @@ func fakeCertificateParserFunc(cert tls.Certificate, err error) func(certPEMBloc
 // TestNewListenerTLSInfo tests that NewListener with valid TLSInfo returns
 // a TLS listener that accepts TLS connections.
 func TestNewListenerTLSInfo(t *testing.T) {
-	tlsInfo, err := createSelfCert(t)
+	tlsInfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 	testNewListenerTLSInfoAccept(t, *tlsInfo)
 }
 
 func TestNewListenerWithOpts(t *testing.T) {
-	tlsInfo, err := createSelfCert(t)
+	tlsInfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := map[string]struct {
 		opts        []ListenerOption
@@ -119,10 +125,11 @@ func TestNewListenerWithOpts(t *testing.T) {
 }
 
 func TestNewListenerWithSocketOpts(t *testing.T) {
-	tlsInfo, err := createSelfCert(t)
+	tlsInfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := map[string]struct {
 		opts        []ListenerOption
@@ -251,25 +258,27 @@ func TestNewListenerTLSInfoSkipClientSANVerify(t *testing.T) {
 }
 
 func testNewListenerTLSInfoClientCheck(t *testing.T, skipClientSANVerify, goodClientHost, acceptExpected bool) {
-	tlsInfo, err := createSelfCert(t)
+	tlsInfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	host := "127.0.0.222"
 	if goodClientHost {
 		host = "127.0.0.1"
 	}
-	clientTLSInfo, err := createSelfCertEx(t, host, x509.ExtKeyUsageClientAuth)
+	clientTLSInfo, del2, err := createSelfCertEx(host, x509.ExtKeyUsageClientAuth)
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del2()
 
 	tlsInfo.SkipClientSANVerify = skipClientSANVerify
 	tlsInfo.TrustedCAFile = clientTLSInfo.CertFile
 
 	rootCAs := x509.NewCertPool()
-	loaded, err := os.ReadFile(tlsInfo.CertFile)
+	loaded, err := ioutil.ReadFile(tlsInfo.CertFile)
 	if err != nil {
 		t.Fatalf("unexpected missing certfile: %v", err)
 	}
@@ -336,10 +345,11 @@ func TestNewListenerTLSEmptyInfo(t *testing.T) {
 }
 
 func TestNewTransportTLSInfo(t *testing.T) {
-	tlsinfo, err := createSelfCert(t)
+	tlsinfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := []TLSInfo{
 		{},
@@ -407,10 +417,11 @@ func TestTLSInfoEmpty(t *testing.T) {
 }
 
 func TestTLSInfoMissingFields(t *testing.T) {
-	tlsinfo, err := createSelfCert(t)
+	tlsinfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := []TLSInfo{
 		{CertFile: tlsinfo.CertFile},
@@ -431,10 +442,11 @@ func TestTLSInfoMissingFields(t *testing.T) {
 }
 
 func TestTLSInfoParseFuncError(t *testing.T) {
-	tlsinfo, err := createSelfCert(t)
+	tlsinfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := []struct {
 		info TLSInfo
@@ -463,10 +475,11 @@ func TestTLSInfoParseFuncError(t *testing.T) {
 
 func TestTLSInfoConfigFuncs(t *testing.T) {
 	ln := zaptest.NewLogger(t)
-	tlsinfo, err := createSelfCert(t)
+	tlsinfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	tests := []struct {
 		info       TLSInfo
@@ -519,7 +532,11 @@ func TestNewListenerUnixSocket(t *testing.T) {
 
 // TestNewListenerTLSInfoSelfCert tests that a new certificate accepts connections.
 func TestNewListenerTLSInfoSelfCert(t *testing.T) {
-	tmpdir := t.TempDir()
+	tmpdir, err := ioutil.TempDir(os.TempDir(), "tlsdir")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpdir)
 	tlsinfo, err := SelfCert(zap.NewExample(), tmpdir, []string{"127.0.0.1"}, 1)
 	if err != nil {
 		t.Fatal(err)

client/pkg/transport/listener_tls.go

@@ -19,8 +19,8 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
+	"io/ioutil"
 	"net"
-	"os"
 	"strings"
 	"sync"
 )
@@ -168,7 +168,7 @@ func (l *tlsListener) acceptLoop() {
 
 func checkCRL(crlPath string, cert []*x509.Certificate) error {
 	// TODO: cache
-	crlBytes, err := os.ReadFile(crlPath)
+	crlBytes, err := ioutil.ReadFile(crlPath)
 	if err != nil {
 		return err
 	}

client/pkg/transport/sockopt.go

@@ -1,17 +1,3 @@
-// Copyright 2021 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
 package transport
 
 import (
@@ -35,12 +21,12 @@ type SocketOpts struct {
 	// in which case lock on data file could result in unexpected
 	// condition. User should take caution to protect against lock race.
 	// [1] https://man7.org/linux/man-pages/man7/socket.7.html
-	ReusePort bool `json:"reuse-port"`
+	ReusePort bool
 	// ReuseAddress enables a socket option SO_REUSEADDR which allows
 	// binding to an address in `TIME_WAIT` state. Useful to improve MTTR
 	// in cases where etcd slow to restart due to excessive `TIME_WAIT`.
 	// [1] https://man7.org/linux/man-pages/man7/socket.7.html
-	ReuseAddress bool `json:"reuse-address"`
+	ReuseAddress bool
 }
 
 func getControls(sopts *SocketOpts) Controls {

client/pkg/transport/sockopt_unix.go

@@ -1,19 +1,5 @@
-// Copyright 2021 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//go:build !windows && !solaris
-// +build !windows,!solaris
+//go:build !windows
+// +build !windows
 
 package transport
 

client/pkg/transport/sockopt_windows.go

@@ -1,17 +1,3 @@
-// Copyright 2021 The etcd Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
 //go:build windows
 // +build windows
 

client/pkg/transport/timeout_transport_test.go

@@ -16,7 +16,7 @@ package transport
 
 import (
 	"bytes"
-	"io"
+	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -63,7 +63,7 @@ func TestNewTimeoutTransport(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected err %v", err)
 	}
-	addr0, err := io.ReadAll(resp.Body)
+	addr0, err := ioutil.ReadAll(resp.Body)
 	resp.Body.Close()
 	if err != nil {
 		t.Fatalf("unexpected err %v", err)
@@ -73,7 +73,7 @@ func TestNewTimeoutTransport(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected err %v", err)
 	}
-	addr1, err := io.ReadAll(resp.Body)
+	addr1, err := ioutil.ReadAll(resp.Body)
 	resp.Body.Close()
 	if err != nil {
 		t.Fatalf("unexpected err %v", err)

client/pkg/transport/transport_test.go

@@ -25,10 +25,11 @@ import (
 // TestNewTransportTLSInvalidCipherSuitesTLS12 expects a client with invalid
 // cipher suites fail to handshake with the server.
 func TestNewTransportTLSInvalidCipherSuitesTLS12(t *testing.T) {
-	tlsInfo, err := createSelfCert(t)
+	tlsInfo, del, err := createSelfCert()
 	if err != nil {
 		t.Fatalf("unable to create cert: %v", err)
 	}
+	defer del()
 
 	cipherSuites := []uint16{
 		tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,

client/v2/client.go

@@ -19,7 +19,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io"
+	"io/ioutil"
 	"math/rand"
 	"net"
 	"net/http"
@@ -601,15 +601,13 @@ func (c *simpleHTTPClient) Do(ctx context.Context, act httpAction) (*http.Respon
 	var body []byte
 	done := make(chan struct{})
 	go func() {
-		body, err = io.ReadAll(resp.Body)
+		body, err = ioutil.ReadAll(resp.Body)
 		done <- struct{}{}
 	}()
 
 	select {
 	case <-ctx.Done():
-		if resp != nil {
-			resp.Body.Close()
-		}
+		resp.Body.Close()
 		<-done
 		return nil, nil, ctx.Err()
 	case <-done:

client/v2/client_test.go

@@ -19,6 +19,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/url"
@@ -126,7 +127,7 @@ func TestSimpleHTTPClientDoSuccess(t *testing.T) {
 
 	tr.respchan <- &http.Response{
 		StatusCode: http.StatusTeapot,
-		Body:       io.NopCloser(strings.NewReader("foo")),
+		Body:       ioutil.NopCloser(strings.NewReader("foo")),
 	}
 
 	resp, body, err := c.Do(context.Background(), &fakeAction{})
@@ -209,7 +210,7 @@ func TestSimpleHTTPClientDoCancelContextResponseBodyClosed(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	cancel()
 
-	body := &checkableReadCloser{ReadCloser: io.NopCloser(strings.NewReader("foo"))}
+	body := &checkableReadCloser{ReadCloser: ioutil.NopCloser(strings.NewReader("foo"))}
 	go func() {
 		// wait that simpleHTTPClient knows the context is already timed out,
 		// and calls CancelRequest

client/v2/curl.go

@@ -17,7 +17,7 @@ package client
 import (
 	"bytes"
 	"fmt"
-	"io"
+	"io/ioutil"
 	"net/http"
 	"os"
 )
@@ -53,18 +53,18 @@ func printcURL(req *http.Request) error {
 	}
 
 	if req.Body != nil {
-		b, err = io.ReadAll(req.Body)
+		b, err = ioutil.ReadAll(req.Body)
 		if err != nil {
 			return err
 		}
 		command += fmt.Sprintf(" -d %q", string(b))
 	}
 
-	fmt.Fprintf(os.Stderr, "cURL Command: %q\n", command)
+	fmt.Fprintf(os.Stderr, "cURL Command: %s\n", command)
 
 	// reset body
 	body := bytes.NewBuffer(b)
-	req.Body = io.NopCloser(body)
+	req.Body = ioutil.NopCloser(body)
 
 	return nil
 }

client/v2/example_keys_test.go

@@ -0,0 +1 @@
+../../tests/integration/client/examples/example_keys_test.go

client/v2/go.mod

@@ -1,19 +1,12 @@
 module go.etcd.io/etcd/client/v2
 
-go 1.17
+go 1.16
 
 require (
-	go.etcd.io/etcd/api/v3 v3.6.0-alpha.0
-	go.etcd.io/etcd/client/pkg/v3 v3.6.0-alpha.0
-	sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6
-)
-
-require (
-	github.com/coreos/go-semver v0.3.0 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	github.com/json-iterator/go v1.1.11
+	github.com/modern-go/reflect2 v1.0.1
+	go.etcd.io/etcd/api/v3 v3.5.0
+	go.etcd.io/etcd/client/pkg/v3 v3.5.0
 )
 
 replace (

client/v2/go.sum

@@ -1,16 +1,11 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
@@ -20,9 +15,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
-github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
@@ -39,7 +32,6 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -48,16 +40,23 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
+github.com/json-iterator/go v1.1.11 h1:uVUAXhF2To8cbw/3xN3pxj6kk7TYKs98NIrTqPlMWAQ=
+github.com/json-iterator/go v1.1.11/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
+github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
@@ -65,7 +64,7 @@ github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5Cc
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/zap v1.17.0/go.mod h1:MXVU+bhUf/A7Xi2HNOnopQOrmycQ5Ih87HtOu4q5SSo=
@@ -76,8 +75,11 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -97,6 +99,7 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -104,8 +107,8 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210603125802-9665404d3644/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -116,8 +119,10 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -128,15 +133,13 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
+google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -148,18 +151,13 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 h1:fD1pz4yfdADVNfFmcP2aBEtudwUQ1AlLnRBALr33v3s=
-sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6/go.mod h1:p4QtZmO4uMYipTQNzagwnNoseA6OxSUutVw05NhYDRs=

client/v2/json.go

@@ -0,0 +1,73 @@
+// Copyright 2019 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package client
+
+import (
+	"strconv"
+	"unsafe"
+
+	"github.com/json-iterator/go"
+	"github.com/modern-go/reflect2"
+)
+
+type customNumberExtension struct {
+	jsoniter.DummyExtension
+}
+
+func (cne *customNumberExtension) CreateDecoder(typ reflect2.Type) jsoniter.ValDecoder {
+	if typ.String() == "interface {}" {
+		return customNumberDecoder{}
+	}
+	return nil
+}
+
+type customNumberDecoder struct {
+}
+
+func (customNumberDecoder) Decode(ptr unsafe.Pointer, iter *jsoniter.Iterator) {
+	switch iter.WhatIsNext() {
+	case jsoniter.NumberValue:
+		var number jsoniter.Number
+		iter.ReadVal(&number)
+		i64, err := strconv.ParseInt(string(number), 10, 64)
+		if err == nil {
+			*(*interface{})(ptr) = i64
+			return
+		}
+		f64, err := strconv.ParseFloat(string(number), 64)
+		if err == nil {
+			*(*interface{})(ptr) = f64
+			return
+		}
+		iter.ReportError("DecodeNumber", err.Error())
+	default:
+		*(*interface{})(ptr) = iter.Read()
+	}
+}
+
+// caseSensitiveJsonIterator returns a jsoniterator API that's configured to be
+// case-sensitive when unmarshalling, and otherwise compatible with
+// the encoding/json standard library.
+func caseSensitiveJsonIterator() jsoniter.API {
+	config := jsoniter.Config{
+		EscapeHTML:             true,
+		SortMapKeys:            true,
+		ValidateJsonRawMessage: true,
+		CaseSensitive:          true,
+	}.Froze()
+	// Force jsoniter to decode number to interface{} via int64/float64, if possible.
+	config.RegisterExtension(&customNumberExtension{})
+	return config
+}

client/v2/keys.go

@@ -26,7 +26,6 @@ import (
 	"time"
 
 	"go.etcd.io/etcd/client/pkg/v3/pathutil"
-	kjson "sigs.k8s.io/json"
 )
 
 const (
@@ -654,9 +653,11 @@ func unmarshalHTTPResponse(code int, header http.Header, body []byte) (res *Resp
 	return res, err
 }
 
+var jsonIterator = caseSensitiveJsonIterator()
+
 func unmarshalSuccessfulKeysResponse(header http.Header, body []byte) (*Response, error) {
 	var res Response
-	err := kjson.UnmarshalCaseSensitivePreserveInts(body, &res)
+	err := jsonIterator.Unmarshal(body, &res)
 	if err != nil {
 		return nil, ErrInvalidJSON
 	}

client/v2/keys_test.go

@@ -18,7 +18,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -654,7 +654,7 @@ func assertRequest(got http.Request, wantMethod string, wantURL *url.URL, wantHe
 		if wantBody == nil {
 			return fmt.Errorf("want.Body=%v got.Body=%s", wantBody, got.Body)
 		}
-		gotBytes, err := io.ReadAll(got.Body)
+		gotBytes, err := ioutil.ReadAll(got.Body)
 		if err != nil {
 			return err
 		}

client/v3/README.md

@@ -1,7 +1,7 @@
-# etcd/client/v3
+# etcd/clientv3
 
 [![Docs](https://img.shields.io/badge/docs-latest-green.svg)](https://etcd.io/docs)
-[![Godoc](https://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://godoc.org/go.etcd.io/etcd/client/v3)
+[![Godoc](https://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://godoc.org/go.etcd.io/etcd/clientv3)
 
 `etcd/clientv3` is the official Go etcd client for v3.
 
@@ -11,23 +11,26 @@
 go get go.etcd.io/etcd/client/v3
 ```
 
+Warning: As etcd 3.5.0 was not yet released, the command above does not work. 
+After first pre-release of 3.5.0 [#12498](https://github.com/etcd-io/etcd/issues/12498), 
+etcd can be referenced using: 
+```
+go get go.etcd.io/etcd/client/v3@v3.5.0-pre
+```
+
 ## Get started
 
 Create client using `clientv3.New`:
 
 ```go
-import clientv3 "go.etcd.io/etcd/client/v3"
-
-func main() {
-	cli, err := clientv3.New(clientv3.Config{
-		Endpoints:   []string{"localhost:2379", "localhost:22379", "localhost:32379"},
-		DialTimeout: 5 * time.Second,
-	})
-	if err != nil {
-		// handle error!
-	}
-	defer cli.Close()
+cli, err := clientv3.New(clientv3.Config{
+	Endpoints:   []string{"localhost:2379", "localhost:22379", "localhost:32379"},
+	DialTimeout: 5 * time.Second,
+})
+if err != nil {
+	// handle error!
 }
+defer cli.Close()
 ```
 
 etcd v3 uses [`gRPC`](https://www.grpc.io) for remote procedure calls. And `clientv3` uses

client/v3/client.go

@@ -54,9 +54,7 @@ type Client struct {
 	cfg      Config
 	creds    grpccredentials.TransportCredentials
 	resolver *resolver.EtcdManualResolver
-
-	epMu      *sync.RWMutex
-	endpoints []string
+	mu       *sync.RWMutex
 
 	ctx    context.Context
 	cancel context.CancelFunc
@@ -162,18 +160,18 @@ func (c *Client) Ctx() context.Context { return c.ctx }
 // Endpoints lists the registered endpoints for the client.
 func (c *Client) Endpoints() []string {
 	// copy the slice; protect original endpoints from being changed
-	c.epMu.RLock()
-	defer c.epMu.RUnlock()
-	eps := make([]string, len(c.endpoints))
-	copy(eps, c.endpoints)
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	eps := make([]string, len(c.cfg.Endpoints))
+	copy(eps, c.cfg.Endpoints)
 	return eps
 }
 
 // SetEndpoints updates client's endpoints.
 func (c *Client) SetEndpoints(eps ...string) {
-	c.epMu.Lock()
-	defer c.epMu.Unlock()
-	c.endpoints = eps
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.cfg.Endpoints = eps
 
 	c.resolver.SetEndpoints(eps)
 }
@@ -263,7 +261,6 @@ func (c *Client) getToken(ctx context.Context) error {
 	resp, err := c.Auth.Authenticate(ctx, c.Username, c.Password)
 	if err != nil {
 		if err == rpctypes.ErrAuthNotEnabled {
-			c.authTokenBundle.UpdateAuthToken("")
 			return nil
 		}
 		return err
@@ -286,7 +283,8 @@ func (c *Client) dial(creds grpccredentials.TransportCredentials, dopts ...grpc.
 	if err != nil {
 		return nil, fmt.Errorf("failed to configure dialer: %v", err)
 	}
-	if c.authTokenBundle != nil {
+	if c.Username != "" && c.Password != "" {
+		c.authTokenBundle = credentials.NewBundle(credentials.Config{})
 		opts = append(opts, grpc.WithPerRPCCredentials(c.authTokenBundle.PerRPCCredentials()))
 	}
 
@@ -298,7 +296,9 @@ func (c *Client) dial(creds grpccredentials.TransportCredentials, dopts ...grpc.
 		dctx, cancel = context.WithTimeout(c.ctx, c.cfg.DialTimeout)
 		defer cancel() // TODO: Is this right for cases where grpc.WithBlock() is not set on the dial options?
 	}
-	target := fmt.Sprintf("%s://%p/%s", resolver.Schema, c, authority(c.endpoints[0]))
+
+	initialEndpoints := strings.Join(c.cfg.Endpoints, ";")
+	target := fmt.Sprintf("%s://%p/#initially=[%s]", resolver.Schema, c, initialEndpoints)
 	conn, err := grpc.DialContext(dctx, target, opts...)
 	if err != nil {
 		return nil, err
@@ -306,20 +306,6 @@ func (c *Client) dial(creds grpccredentials.TransportCredentials, dopts ...grpc.
 	return conn, nil
 }
 
-func authority(endpoint string) string {
-	spl := strings.SplitN(endpoint, "://", 2)
-	if len(spl) < 2 {
-		if strings.HasPrefix(endpoint, "unix:") {
-			return endpoint[len("unix:"):]
-		}
-		if strings.HasPrefix(endpoint, "unixs:") {
-			return endpoint[len("unixs:"):]
-		}
-		return endpoint
-	}
-	return spl[1]
-}
-
 func (c *Client) credentialsForEndpoint(ep string) grpccredentials.TransportCredentials {
 	r := endpoint.RequiresCredentials(ep)
 	switch r {
@@ -359,7 +345,7 @@ func newClient(cfg *Config) (*Client, error) {
 		creds:    creds,
 		ctx:      ctx,
 		cancel:   cancel,
-		epMu:     new(sync.RWMutex),
+		mu:       new(sync.RWMutex),
 		callOpts: defaultCallOpts,
 		lgMu:     new(sync.RWMutex),
 	}
@@ -379,7 +365,6 @@ func newClient(cfg *Config) (*Client, error) {
 	if cfg.Username != "" && cfg.Password != "" {
 		client.Username = cfg.Username
 		client.Password = cfg.Password
-		client.authTokenBundle = credentials.NewBundle(credentials.Config{})
 	}
 	if cfg.MaxCallSendMsgSize > 0 || cfg.MaxCallRecvMsgSize > 0 {
 		if cfg.MaxCallRecvMsgSize > 0 && cfg.MaxCallSendMsgSize > cfg.MaxCallRecvMsgSize {
@@ -405,8 +390,6 @@ func newClient(cfg *Config) (*Client, error) {
 		client.cancel()
 		return nil, fmt.Errorf("at least one Endpoint is required in client config")
 	}
-	client.SetEndpoints(cfg.Endpoints...)
-
 	// Use a provided endpoint target so that for https:// without any tls config given, then
 	// grpc will assume the certificate server name is the endpoint host.
 	conn, err := client.dialWithBalancer()

client/v3/client_test.go

@@ -17,24 +17,20 @@ package clientv3
 import (
 	"context"
 	"fmt"
+	"go.uber.org/zap"
 	"net"
-	"path/filepath"
 	"testing"
 	"time"
 
-	"go.etcd.io/etcd/api/v3/etcdserverpb"
 	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 	"go.etcd.io/etcd/client/pkg/v3/testutil"
-	"go.uber.org/zap"
 	"go.uber.org/zap/zaptest"
 
 	"google.golang.org/grpc"
 )
 
 func NewClient(t *testing.T, cfg Config) (*Client, error) {
-	if cfg.Logger == nil {
-		cfg.Logger = zaptest.NewLogger(t).Named("client")
-	}
+	cfg.Logger = zaptest.NewLogger(t)
 	return New(cfg)
 }
 
@@ -202,52 +198,3 @@ func TestZapWithLogger(t *testing.T) {
 		t.Errorf("WithZapLogger should modify *zap.Logger")
 	}
 }
-
-func TestAuthTokenBundleNoOverwrite(t *testing.T) {
-	// Create a mock AuthServer to handle Authenticate RPCs.
-	lis, err := net.Listen("unix", filepath.Join(t.TempDir(), "etcd-auth-test:0"))
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer lis.Close()
-	addr := "unix://" + lis.Addr().String()
-	srv := grpc.NewServer()
-	etcdserverpb.RegisterAuthServer(srv, mockAuthServer{})
-	go srv.Serve(lis)
-	defer srv.Stop()
-
-	// Create a client, which should call Authenticate on the mock server to
-	// exchange username/password for an auth token.
-	c, err := NewClient(t, Config{
-		DialTimeout: 5 * time.Second,
-		Endpoints:   []string{addr},
-		Username:    "foo",
-		Password:    "bar",
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer c.Close()
-	oldTokenBundle := c.authTokenBundle
-
-	// Call the public Dial again, which should preserve the original
-	// authTokenBundle.
-	gc, err := c.Dial(addr)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer gc.Close()
-	newTokenBundle := c.authTokenBundle
-
-	if oldTokenBundle != newTokenBundle {
-		t.Error("Client.authTokenBundle has been overwritten during Client.Dial")
-	}
-}
-
-type mockAuthServer struct {
-	*etcdserverpb.UnimplementedAuthServer
-}
-
-func (mockAuthServer) Authenticate(context.Context, *etcdserverpb.AuthenticateRequest) (*etcdserverpb.AuthenticateResponse, error) {
-	return &etcdserverpb.AuthenticateResponse{Token: "mock-token"}, nil
-}

client/v3/doc.go

@@ -47,8 +47,8 @@
 // To specify a client request timeout, wrap the context with context.WithTimeout:
 //
 //	ctx, cancel := context.WithTimeout(context.Background(), timeout)
-//	defer cancel()
 //	resp, err := kvc.Put(ctx, "sample_key", "sample_value")
+//	cancel()
 //	if err != nil {
 //	    // handle error!
 //	}

client/v3/go.mod

@@ -1,43 +1,18 @@
 module go.etcd.io/etcd/client/v3
 
-go 1.17
+go 1.16
 
 require (
 	github.com/dustin/go-humanize v1.0.0
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
 	github.com/prometheus/client_golang v1.11.0
-	go.etcd.io/etcd/api/v3 v3.6.0-alpha.0
-	go.etcd.io/etcd/client/pkg/v3 v3.6.0-alpha.0
+	go.etcd.io/etcd/api/v3 v3.5.0
+	go.etcd.io/etcd/client/pkg/v3 v3.5.0
 	go.uber.org/zap v1.17.0
-	google.golang.org/grpc v1.41.0
+	google.golang.org/grpc v1.38.0
 	sigs.k8s.io/yaml v1.2.0
 )
 
-require (
-	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.1 // indirect
-	github.com/coreos/go-semver v0.3.0 // indirect
-	github.com/coreos/go-systemd/v22 v22.3.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.26.0 // indirect
-	github.com/prometheus/procfs v0.6.0 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
-	go.uber.org/atomic v1.7.0 // indirect
-	go.uber.org/multierr v1.6.0 // indirect
-	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
-	golang.org/x/sys v0.0.0-20210603125802-9665404d3644 // indirect
-	golang.org/x/text v0.3.5 // indirect
-	google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1 // indirect
-	google.golang.org/protobuf v1.27.1 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
-)
-
 replace (
 	go.etcd.io/etcd/api/v3 => ../../api
 	go.etcd.io/etcd/client/pkg/v3 => ../pkg

client/v3/go.sum

@@ -1,7 +1,6 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
@@ -13,15 +12,11 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd/v22 v22.3.2 h1:D9/bQk5vlXQFZ6Kwuu6zaiXJ9oTPe68++AzAJc1DzSI=
@@ -34,9 +29,7 @@ github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25Kn
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
-github.com/envoyproxy/go-control-plane v0.9.10-0.20210907150352-cf90f659a021/go.mod h1:AFq3mo9L8Lqqiid3OhADV3RfLJnjiw63cSpi+fDTRC0=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
@@ -133,7 +126,6 @@ github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6L
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
-github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
@@ -144,7 +136,7 @@ github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5Cc
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
@@ -159,8 +151,11 @@ golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -186,6 +181,7 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -200,10 +196,10 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210603125802-9665404d3644 h1:CA1DEQ4NdKphKeL70tvsWNdT5oFh1lOjihRcEDROi0I=
-golang.org/x/sys v0.0.0-20210603125802-9665404d3644/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
@@ -216,8 +212,10 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -229,17 +227,15 @@ google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1 h1:b9mVrqYfq3P4bCdaLg1qtBnPzUYgglsIdjZkL/fQVOE=
-google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c h1:wtujag7C+4D6KMoulW9YauvK2lgdvCMS260jsqqBXr0=
+google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxHCcBojKKwX1terBiRUaqAsFqJiF615XL43r0=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.41.0 h1:f+PlOh7QV4iIJkPrx5NQ7qaNGFQ3OTse67yaDHfju4E=
-google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
+google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
+google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -250,9 +246,8 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
@@ -263,9 +258,8 @@ gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

client/v3/kv.go

@@ -16,7 +16,6 @@ package clientv3
 
 import (
 	"context"
-	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 
 	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
 
@@ -146,14 +145,10 @@ func (kv *kv) Do(ctx context.Context, op Op) (OpResponse, error) {
 	var err error
 	switch op.t {
 	case tRange:
-		if op.IsSortOptionValid() {
-			var resp *pb.RangeResponse
-			resp, err = kv.remote.Range(ctx, op.toRangeRequest(), kv.callOpts...)
-			if err == nil {
-				return OpResponse{get: (*GetResponse)(resp)}, nil
-			}
-		} else {
-			err = rpctypes.ErrInvalidSortOption
+		var resp *pb.RangeResponse
+		resp, err = kv.remote.Range(ctx, op.toRangeRequest(), kv.callOpts...)
+		if err == nil {
+			return OpResponse{get: (*GetResponse)(resp)}, nil
 		}
 	case tPut:
 		var resp *pb.PutResponse

client/v3/lease.go

@@ -439,9 +439,6 @@ func (l *lessor) recvKeepAliveLoop() (gerr error) {
 	for {
 		stream, err := l.resetRecv()
 		if err != nil {
-			l.lg.Warn("error occurred during lease keep alive loop",
-				zap.Error(err),
-			)
 			if canceledByCaller(l.stopCtx, err) {
 				return err
 			}
@@ -574,9 +571,7 @@ func (l *lessor) sendKeepAliveLoop(stream pb.Lease_LeaseKeepAliveClient) {
 		for _, id := range tosend {
 			r := &pb.LeaseKeepAliveRequest{ID: int64(id)}
 			if err := stream.Send(r); err != nil {
-				l.lg.Warn("error occurred during lease keep alive request sending",
-					zap.Error(err),
-				)
+				// TODO do something with this error?
 				return
 			}
 		}

client/v3/maintenance.go

@@ -16,7 +16,6 @@ package clientv3
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"io"
 
@@ -32,15 +31,6 @@ type (
 	StatusResponse     pb.StatusResponse
 	HashKVResponse     pb.HashKVResponse
 	MoveLeaderResponse pb.MoveLeaderResponse
-	DowngradeResponse  pb.DowngradeResponse
-
-	DowngradeAction pb.DowngradeRequest_DowngradeAction
-)
-
-const (
-	DowngradeValidate = DowngradeAction(pb.DowngradeRequest_VALIDATE)
-	DowngradeEnable   = DowngradeAction(pb.DowngradeRequest_ENABLE)
-	DowngradeCancel   = DowngradeAction(pb.DowngradeRequest_CANCEL)
 )
 
 type Maintenance interface {
@@ -67,40 +57,14 @@ type Maintenance interface {
 	// is non-zero, the hash is computed on all keys at or below the given revision.
 	HashKV(ctx context.Context, endpoint string, rev int64) (*HashKVResponse, error)
 
-	// SnapshotWithVersion returns a reader for a point-in-time snapshot and version of etcd that created it.
-	// If the context "ctx" is canceled or timed out, reading from returned
-	// "io.ReadCloser" would error out (e.g. context.Canceled, context.DeadlineExceeded).
-	SnapshotWithVersion(ctx context.Context) (*SnapshotResponse, error)
-
 	// Snapshot provides a reader for a point-in-time snapshot of etcd.
 	// If the context "ctx" is canceled or timed out, reading from returned
 	// "io.ReadCloser" would error out (e.g. context.Canceled, context.DeadlineExceeded).
-	// Deprecated: use SnapshotWithVersion instead.
 	Snapshot(ctx context.Context) (io.ReadCloser, error)
 
 	// MoveLeader requests current leader to transfer its leadership to the transferee.
 	// Request must be made to the leader.
 	MoveLeader(ctx context.Context, transfereeID uint64) (*MoveLeaderResponse, error)
-
-	// Downgrade requests downgrades, verifies feasibility or cancels downgrade
-	// on the cluster version.
-	// Supported since etcd 3.5.
-	Downgrade(ctx context.Context, action DowngradeAction, version string) (*DowngradeResponse, error)
-}
-
-// SnapshotResponse is aggregated response from the snapshot stream.
-// Consumer is responsible for closing steam by calling .Snapshot.Close()
-type SnapshotResponse struct {
-	// Header is the first header in the snapshot stream, has the current key-value store information
-	// and indicates the point in time of the snapshot.
-	Header *pb.ResponseHeader
-	// Snapshot exposes ReaderCloser interface for data stored in the Blob field in the snapshot stream.
-	Snapshot io.ReadCloser
-	// Version is the local version of server that created the snapshot.
-	// In cluster with binaries with different version, each cluster can return different result.
-	// Informs which etcd server version should be used when restoring the snapshot.
-	// Supported on etcd >= v3.6.
-	Version string
 }
 
 type maintenance struct {
@@ -238,46 +202,6 @@ func (m *maintenance) HashKV(ctx context.Context, endpoint string, rev int64) (*
 	return (*HashKVResponse)(resp), nil
 }
 
-func (m *maintenance) SnapshotWithVersion(ctx context.Context) (*SnapshotResponse, error) {
-	ss, err := m.remote.Snapshot(ctx, &pb.SnapshotRequest{}, append(m.callOpts, withMax(defaultStreamMaxRetries))...)
-	if err != nil {
-		return nil, toErr(ctx, err)
-	}
-
-	m.lg.Info("opened snapshot stream; downloading")
-	pr, pw := io.Pipe()
-
-	resp, err := ss.Recv()
-	if err != nil {
-		m.logAndCloseWithError(err, pw)
-	}
-	go func() {
-		// Saving response is blocking
-		err = m.save(resp, pw)
-		if err != nil {
-			m.logAndCloseWithError(err, pw)
-			return
-		}
-		for {
-			resp, err := ss.Recv()
-			if err != nil {
-				m.logAndCloseWithError(err, pw)
-				return
-			}
-			err = m.save(resp, pw)
-			if err != nil {
-				m.logAndCloseWithError(err, pw)
-				return
-			}
-		}
-	}()
-	return &SnapshotResponse{
-		Header:   resp.Header,
-		Snapshot: &snapshotReadCloser{ctx: ctx, ReadCloser: pr},
-		Version:  resp.Version,
-	}, err
-}
-
 func (m *maintenance) Snapshot(ctx context.Context) (io.ReadCloser, error) {
 	ss, err := m.remote.Snapshot(ctx, &pb.SnapshotRequest{}, append(m.callOpts, withMax(defaultStreamMaxRetries))...)
 	if err != nil {
@@ -286,44 +210,32 @@ func (m *maintenance) Snapshot(ctx context.Context) (io.ReadCloser, error) {
 
 	m.lg.Info("opened snapshot stream; downloading")
 	pr, pw := io.Pipe()
-
 	go func() {
 		for {
 			resp, err := ss.Recv()
 			if err != nil {
-				m.logAndCloseWithError(err, pw)
+				switch err {
+				case io.EOF:
+					m.lg.Info("completed snapshot read; closing")
+				default:
+					m.lg.Warn("failed to receive from snapshot stream; closing", zap.Error(err))
+				}
+				pw.CloseWithError(err)
 				return
 			}
-			err = m.save(resp, pw)
-			if err != nil {
-				m.logAndCloseWithError(err, pw)
+
+			// can "resp == nil && err == nil"
+			// before we receive snapshot SHA digest?
+			// No, server sends EOF with an empty response
+			// after it sends SHA digest at the end
+
+			if _, werr := pw.Write(resp.Blob); werr != nil {
+				pw.CloseWithError(werr)
 				return
 			}
 		}
 	}()
-	return &snapshotReadCloser{ctx: ctx, ReadCloser: pr}, err
-}
-
-func (m *maintenance) logAndCloseWithError(err error, pw *io.PipeWriter) {
-	switch err {
-	case io.EOF:
-		m.lg.Info("completed snapshot read; closing")
-	default:
-		m.lg.Warn("failed to receive from snapshot stream; closing", zap.Error(err))
-	}
-	pw.CloseWithError(err)
-}
-
-func (m *maintenance) save(resp *pb.SnapshotResponse, pw *io.PipeWriter) error {
-	// can "resp == nil && err == nil"
-	// before we receive snapshot SHA digest?
-	// No, server sends EOF with an empty response
-	// after it sends SHA digest at the end
-
-	if _, werr := pw.Write(resp.Blob); werr != nil {
-		return werr
-	}
-	return nil
+	return &snapshotReadCloser{ctx: ctx, ReadCloser: pr}, nil
 }
 
 type snapshotReadCloser struct {
@@ -340,19 +252,3 @@ func (m *maintenance) MoveLeader(ctx context.Context, transfereeID uint64) (*Mov
 	resp, err := m.remote.MoveLeader(ctx, &pb.MoveLeaderRequest{TargetID: transfereeID}, m.callOpts...)
 	return (*MoveLeaderResponse)(resp), toErr(ctx, err)
 }
-
-func (m *maintenance) Downgrade(ctx context.Context, action DowngradeAction, version string) (*DowngradeResponse, error) {
-	var actionType pb.DowngradeRequest_DowngradeAction
-	switch action {
-	case DowngradeValidate:
-		actionType = pb.DowngradeRequest_VALIDATE
-	case DowngradeEnable:
-		actionType = pb.DowngradeRequest_ENABLE
-	case DowngradeCancel:
-		actionType = pb.DowngradeRequest_CANCEL
-	default:
-		return nil, errors.New("etcdclient: unknown downgrade action")
-	}
-	resp, err := m.remote.Downgrade(ctx, &pb.DowngradeRequest{Action: actionType, Version: version}, m.callOpts...)
-	return (*DowngradeResponse)(resp), toErr(ctx, err)
-}

client/v3/mirror/syncer.go

@@ -68,8 +68,7 @@ func (s *syncer) SyncBase(ctx context.Context) (<-chan clientv3.GetResponse, cha
 
 		var key string
 
-		opts := []clientv3.OpOption{clientv3.WithLimit(batchLimit), clientv3.WithRev(s.rev),
-			clientv3.WithSort(clientv3.SortByKey, clientv3.SortAscend)}
+		opts := []clientv3.OpOption{clientv3.WithLimit(batchLimit), clientv3.WithRev(s.rev)}
 
 		if len(s.prefix) == 0 {
 			// If len(s.prefix) == 0, we will sync the entire key-value space.

client/v3/mock/mockserver/mockserver.go

@@ -17,6 +17,7 @@ package mockserver
 import (
 	"context"
 	"fmt"
+	"io/ioutil"
 	"net"
 	"os"
 	"sync"
@@ -83,7 +84,7 @@ func startMockServersUnix(count int) (ms *MockServers, err error) {
 	dir := os.TempDir()
 	addrs := make([]string, 0, count)
 	for i := 0; i < count; i++ {
-		f, err := os.CreateTemp(dir, "etcd-unix-so-")
+		f, err := ioutil.TempFile(dir, "etcd-unix-so-")
 		if err != nil {
 			return nil, fmt.Errorf("failed to allocate temp file for unix socket: %v", err)
 		}