Support health check for non-leader pods

[chelseychen]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Health check in non-leader pods will fail when running in leader election mode as non-leader pods don't update lastActivity timestamp. This PR adds a condition so that only leader pod will check lastActivity field.

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Does this PR introduce a user-facing change?

None

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

Hi @chelseychen. Thanks for your PR.

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[chelseychen]

/assign @raywainman @kwiesmueller

[raywainman]

Small little nits to align this with the other components in this repo. Thanks!!

[raywainman]

/lgtm

/ok-to-test

[k8s-triage-robot]

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/lifecycle stale

[raywainman]

/remove-lifecycle stale

[kwiesmueller]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chelseychen, kwiesmueller

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• addon-resizer/OWNERS [kwiesmueller]

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