exposing hashed storage versions via the discovery API

[shekhar-rajak]

Enhancement Description

• One-line enhancement description (can be used as a release note): exposing hashed storage versions via the discovery API
• Kubernetes Enhancement Proposal:

We propose to expose the hashed storage versions in the discovery API.

Motivation

We intend to use the exposed storage version hash to trigger the storage
version migrator.

In short, the storage version migrator detects if objects in etcd are stored in
a version different than the configured storage version. If so, the migrator
issues no-op update for the objects to migrate them to the storage version.

The storage version migrator can keep track of the versions the objects are
stored as. However, today the migrator has no way to tell what the expected
storage versions are. Thus we propose to expose this piece of information via
the discovery API.

• 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):
• Alpha
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update PR(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

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[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
• Mark this issue or PR as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

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

/close

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