Seems that additinal refresh of go.sum files is needed during the
release process after editing the versions of modules.
Discovered the problem while I was testing whether etcdutl is
properly included in the target binaries using:
```
DRY_RUN=true REPOSITORY=\`pwd\` BRANCH='branch-with-etcdutl' ./scripts/release 3.5.0-foobar.2
```
- Fix script that creates manifest-list based multi-arch-images.
The images need to be pushed first.
- Use docker instead of gcloud docker helper
- Make sure docker pushes are properly 'dry run'
- Added preparation instruction to the release script.
- making sure the DRY_RUN mode can finish e2e, so e.g. commits to
local copy of repository are OK in dry-run (while git pushes are NOT).
- better interaction with ./test_lib.sh script.
- more consistent logging
- bringing back s390x architecture that on go 1.14.3 seems to work as
expected.
Change amd64 docker image to use a `-amd64` suffix, consistent with
other architectures. Introduce a multiarch docker manifest list with
the original (no-arch) docker tag.
Fixes#10380
Changes:
- signing tags.
- allows to override BRANCH and REPOSITORY using env variables.
Tested by a release in my private fork:
BRANCH="20201126-ptabor-release" REPOSITORY="git@github.com:ptabor/etcd.git" ./scripts/release 3.5.0-alpha.20
