[Tracking Issue] Enrich the Descheduler Metrics

[Dentrax]

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As a contributor and end-user of Descheduler, we rollout it over 300+ Kubernetes clusters. I can clearly see that one of the improvement point of the Descheduler is metrics. Since Descheduler provides limited number of metrics, sometimes it can also be challenging to observe and monitor internal metrics in production. (Especially during HPA, a bunch of node(s) add/remove, etc.) I'm proposing we should prioritize the observability topics.

There is already going discussions on some issues and PRs spread around, so that I just wanted to gather all of them in one umbrella to boost awareness and make easy to track:

• [ ] - #503
• [ ] - #919
• [ ] - #905
• [ ] - #951 (PR: #958)
• [ ] - #1037 (PR: #1041)
• [ ] - #1046

Dropping some closed PRs for reference:

• #648
• #859

[harshanarayana]

I can take a stab at #1046 once we have some more metrics generated for the strategies that are required.

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/lifecycle rotten

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/close not-planned

[k8s-ci-robot]

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

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

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/close not-planned

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[a7i]

/remove-lifecycle rotten /reopen

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/lifecycle stale

[k8s-triage-robot]

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

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• After 90d of inactivity, lifecycle/stale is applied
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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.

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:

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

/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
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.