StorageVersion API for HA API servers

[shekhar-rajak]

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Enhancement Description

• One-line enhancement description (can be used as a release note):

StorageVersion API for HA API servers

• Kubernetes Enhancement Proposal:

During the rolling upgrade of an HA master, the API server instances may use different storage versions encoding a resource. The storageVersionHash in the discovery document does not expose this disagreement. As a result, the storage migrator may proceed with migration with the false belief that all API server instances are encoding objects using the same storage version, resulting in polluted migration. (details).

We propose a way to show what storage versions all API servers are using, so that the storage migrator can defer migration until an agreement has been reached.

• Discussion Link:
• Primary contact (assignee): @xuchao
• Responsible SIGs: sig-api-machinery
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y):
  • Beta release target (x.y):
  • Stable release target (x.y):
• [x] Alpha
  • [x] KEP (k/enhancements) update PR(s):
  • [x] Code (k/k) update PR(s):
  • [x] Docs (k/website) update PR(s):
• [ ] Beta
  • [x] KEP (k/enhancements) update PR(s): https://github.com/kubernetes/enhancements/pull/4440
  • [ ] Code (k/k) update PR(s): https://github.com/kubernetes/kubernetes/pull/123143
  • [ ] Docs (k/website) update(s):

Please keep this description up to date. This will help the Enhancement Team to track the evolution of the enhancement efficiently.

[shekhar-rajak]

#2331 created for migrating the old keps into new template.

[lasomethingsomething]

/sig api-machinery

[fejta-bot]

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Send feedback to sig-contributor-experience at kubernetes/community. /lifecycle stale

[k8s-triage-robot]

Stale issues rot after 30d of inactivity. Mark the issue as fresh with /remove-lifecycle rotten. Rotten issues close after an additional 30d of inactivity.

If this issue is safe to close now please do so with /close.

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[k8s-triage-robot]

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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
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/close

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[deads2k]

@enj expressed interest in implementing.

/lead-opted-in /milestone v1.26

[deads2k]

/reopen

[k8s-ci-robot]

@deads2k: Reopened this issue.

In response to this:

/reopen

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[enj]

/remove-lifecycle rotten /assign

[rhockenbury]

/label tracked/yes /remove-label tracked/no /stage alpha

[k8s-ci-robot]

@rhockenbury: Those labels are not set on the issue: tracked/no

In response to this:

/label tracked/yes /remove-label tracked/no /stage alpha

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[rhockenbury]

Hello @enj 👋, 1.26 Enhancements team here.

Just checking in as we approach enhancements freeze TOMORROW on 18:00 PDT on Thursday 6th October 2022.

This enhancement is targeting for stage alpha for 1.26 (correct me, if otherwise)

Here's where this enhancement currently stands:

• [ ] KEP readme using the latest template has been merged into the k/enhancements repo.
• [ ] KEP status is marked as implementable for latest-milestone: 1.26
• [ ] KEP readme has a updated detailed test plan section filled out
• [ ] KEP readme has up to date graduation criteria
• [ ] KEP has a production readiness review that has been completed and merged into k/enhancements.

For this KEP, we would need to open a PR to meet all the requirements.

The status of this enhancement is marked as at risk. Please keep the issue description up-to-date with appropriate stages as well. Thank you!

[enj]

@rhockenbury #3593 is open for review.

[enj]

/assign @andrewsykim

[rhockenbury]

With #3593 merged, I have this marked as tracked for v1.26. Thanks.

[enj]

@rhockenbury thanks! Note that this is going beta in v1.26, not alpha.

[rhockenbury]

Thanks, fixed in the tracking sheet.

[katmutua]

Hello @enj! 👋🏾,

@katmutua 1.26 Release Docs shadow here. This enhancement is marked as ‘Needs Docs’ for 1.26 release.

Please follow the steps detailed in the documentation to open a PR against dev-1.26 branch in the k/website repo. This PR can be just a placeholder at this time, and must be created by November 9.

Also, take a look at Documenting for a release to familiarize yourself with the docs requirement for the release. As a reminder, please link all of your docs PR to this issue so we can easily track it.

[ruheenaansari34]

Hi @xuchao 👋,

Checking in once more as we approach the 1.26 code freeze at 17:00 PDT on Tuesday 8th November 2022.

Please ensure the following items are completed:

• [ ] All PRs to the Kubernetes repo that are related to your enhancement are linked in the above issue description (for tracking purposes).
• [ ] All PRs are fully merged by the code freeze deadline.

For this enhancement, I could not locate any k/k PRs. Please plan to get PRs out for all k/k codes so it can be merged up by code freeze. If you do have k/k PRs open, please link them to this issue.

As always, we are here to help should questions come up. Thanks!

[rhockenbury]

Hello 👋, 1.26 Enhancements Lead here.

Unfortunately, this enhancement did not meet requirements for code freeze.

If you still wish to progress this enhancement in v1.26, please file an exception request. Thanks!

/milestone clear /label tracked/no /remove-label tracked/yes /remove-label lead-opted-in

[k8s-triage-robot]

The Kubernetes project currently lacks enough 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
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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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/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
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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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:

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/close not-planned

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[richabanker]

/reopen

[k8s-ci-robot]

@Richabanker: Reopened this issue.

In response to this:

/reopen

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[richabanker]

/remove-lifecycle rotten

[k8s-triage-robot]

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

This bot triages un-triaged 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:

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

/lifecycle stale

[richabanker]

/milestone v1.30