Improve probes to avoid cluster disturbance

[erikgb]

I think it should be possible to update HNC with a rolling update without any cluster disturbance. Some of the webhooks in HNC intercepts a great percentage of API requests, and there should always be (at least) one webhook endpoint ready to serve requests at any time (after the initial bootstrapping of HNC).

Some probes were introduced in #139, but they are not "deep" enough, and just checks that the webhook server in HNC is available network-wise. I think some of the webhooks require the forest to be fully synced before the webhook can give a reasonable response to the API server request. And I think the probes should check that HNC is really ready to serve requests before the probe is successful.

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/lifecycle stale

[k8s-triage-robot]

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/lifecycle rotten

[k8s-triage-robot]

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
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
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/close

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue.

In response to this:

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

This bot triages issues and PRs 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
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Reopen this issue or PR with /reopen
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/close

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