mirrors/tailscale
1
0
Fork 0
Code Issues Pull Requests Projects Wiki Activity

cmd/{k8s-operator,k8s-nameserver},k8s-operator: update nameserver config with records for ingress/egress proxies (#11019)

Browse Source 
cmd/k8s-operator: optionally update dnsrecords Configmap with DNS records for proxies.

This commit adds functionality to automatically populate
DNS records for the in-cluster ts.net nameserver
to allow cluster workloads to resolve MagicDNS names
associated with operator's proxies.

The records are created as follows:
* For tailscale Ingress proxies there will be
a record mapping the MagicDNS name of the Ingress
device and each proxy Pod's IP address.
* For cluster egress proxies, configured via
tailscale.com/tailnet-fqdn annotation, there will be
a record for each proxy Pod, mapping
the MagicDNS name of the exposed
tailnet workload to the proxy Pod's IP.

No records will be created for any other proxy types.
Records will only be created if users have configured
the operator to deploy an in-cluster ts.net nameserver
by applying tailscale.com/v1alpha1.DNSConfig.

It is user's responsibility to add the ts.net nameserver
as a stub nameserver for ts.net DNS names.
https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/#configuration-of-stub-domain-and-upstream-nameserver-using-coredns
https://cloud.google.com/kubernetes-engine/docs/how-to/kube-dns#upstream_nameservers

See also https://github.com/tailscale/tailscale/pull/11017

Updates tailscale/tailscale#10499

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
This commit is contained in:
Irbe Krumina
2024-05-02 17:29:46 +01:00
committed by GitHub
parent a49ed2e145
commit 19b31ac9a6
19 changed files with 723 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
k8s-operator/tsdns.go
View File

@ -5,12 +5,18 @@
package kube
const Alpha1Version = "v1alpha1"
const (
Alpha1Version = "v1alpha1"
DNSRecordsCMName = "dnsrecords"
DNSRecordsCMKey = "records.json"
)
type Records struct {
// Version is the version of this Records configuration. Version is
// intended to be used by ./cmd/k8s-nameserver to determine whether it
// can read this records configuration.
// written by the operator, i.e when it first populates the Records.
// k8s-nameserver must verify that it knows how to parse a given
// version.
Version string `json:"version"`
// IP4 contains a mapping of DNS names to IPv4 address(es).
IP4 map[string][]string `json:"ip4"`