feature request: make node cache metrics listen port reusable

[paveew]

Since kubernets1.25 rollouts maxSurge for DaemonSets, it's easier to support zero-downtime upgrade for node-local-dns.

If we set maxSurge to 1 and maxUnavailable to 0 for DaemonSet, a new pod will created before the old one is deleted during an upgrade, which is an expected behavior and makes node-local-dns always available.

However, the new node-local-dns pod attempts to listen port 9353 for metrics, which produces an address already in use error because the port is currently in use by the old node-local-dns pod.

If node-local-dns supports reuse of ports, i.e. SO_REUSEPORT, it would be great for this case.

node-local-dns HA reference：https://github.com/kubernetes/dns/issues/324

[k8s-ci-robot]

@kundan2707: The label(s) kind/feaure cannot be applied, because the repository doesn't have them.

In response to this:

/kind feaure

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[kundan2707]

/kind feature

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/lifecycle stale

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/lifecycle rotten

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The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

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• After 90d of inactivity, lifecycle/stale is applied
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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
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You can:

• Reopen this issue with /reopen
• Mark this issue as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close not-planned

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