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617821eb39
Automatic merge from submit-queue (batch tested with PRs 56497, 56500, 55018, 56544, 56425). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Add brackets around IPv6 kube-dns liveness probe addrs **What this PR does / why we need it**: Previously, when an IPv6-only Kubernetes cluster was instantiated via 'kubeadm init ...', the liveness probes that were configured by kubeadm for kube-dns currently use IP:port strings of "::1:53" and "::1:10053". These IP:port strings should instead include brackets around the ::1 IPv6 loopback address, e.g. "[::1]:53" and "[::1]:10053". This change adds the necessary brackets around the ::1 IPv6 loopback address. Without this change, the kube-dns sidecar container interprets the bracket-less strings as IPv4 IP:port strings that have too many colons, and the kube-dns pod is restarted about once every 2 minutes. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #56543 /area ipv6 /sig network **Special notes for your reviewer**: **Release note**: ```release-note NONE ```