Add downward API support for hugepages

[derekwaynecarr]

Enhancement Description

• One-line enhancement description (can be used as a release note): Add downward API support for hugepages
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/2053-downward-api-hugepages
• Discussion Link: https://docs.google.com/document/d/1Ne57gvidMEWXR70OxxnRkYquAoMpt56o75oZtg-OeBg/edit?disco=AAAAG5bcPuM
• Primary contact (assignee): @derekwaynecarr
• Responsible SIGs: sig-node
• Kubernetes PR: Add support for hugepages in downward API kubernetes#86102
• k/website PR: Add documentation for downward API hugepages website#24904
• Enhancement target (which target equals to which milestone):
  • Alpha release target 1.20
  • Beta release target 1.21
  • Stable release target 1.27:
    • KEP (k/enhancements) update PR(s):
      • KEP-2053: Graduate DownwardAPIHugePages feature to stable #3719
      • KEP-2053 Update test plan for DownwardAPIHugePages #3865
    • Code (k/k) update PR(s):
      • Graduate DownwardAPIHugePages feature to stable / GA kubernetes#115721
    • Docs (k/website) update(s): [KEP-2053] Add docs for DownwardAPIHugepages graduation website#39905

[derekwaynecarr]

After reflecting on the implementation PR: kubernetes/kubernetes#86102

I think this needs a KEP as it loosens validation, and as a result, the feature requires that all kubelets have the support enabled before the API server accepts its usage. Will write a quick KEP now.

/sig node

[kikisdeliveryservice]

Took a quick 👀 and the kep would need alpha graduation criteria but other than that it has the testplans, implementable state, etc... So would need that update and to merge before October 6th

[kikisdeliveryservice]

PR #2055 was updated and now it meets the criteria (pending sig-node review ofc), we'll just need this to merge by October 6th to be included in 1.20

[kinarashah]

Hi @derekwaynecarr,

Enhancement shadow for 1.20 release team here 👋 ,

Just a reminder that the Enhancements Freeze is Tomorrow October 6th EOD PST. All KEPs and updates must be merged by that time. After October 6th, you will need to request an Exception to be included in the 1.20 Release.

Thank you.

[kinarashah]

Hi @derekwaynecarr ,

Since your Enhancement is scheduled to be in 1.20, please keep in mind the important upcoming dates:
Friday, Nov 6th: Week 8 - Docs Placeholder PR deadline
Thursday, Nov 12th: Week 9 - Code Freeze

As a reminder, please link all of your k/k PR as well as docs PR to this issue so we can track them.

Thank you!

[annajung]

Hello @derekwaynecarr 👋 , 1.20 Docs lead here.

Does this enhancement work planned for 1.20 require any new docs or modification to existing docs?

If so, please follows the steps here to open a PR against dev-1.20 branch in the k/website repo. This PR can be just a placeholder at this time and must be created before Nov 6th

Also, take a look at Documenting for a release to get yourself familiarize with the docs requirement for the release.

Thank you!

[annajung]

Hi @derekwaynecarr

The docs placeholder deadline is this Friday. Please make sure to create a placeholder PR against the dev-1.20 branch in the k/website before the deadline

Also, please keep in mind the important upcoming dates:

• Friday, Nov 6th: Week 8 - Docs Placeholder PR deadline
• Thursday, Nov 12th: Week 9 - Code Freeze
• Monday, Nov 23rd: Week 11 - Docs PR Ready for Review

As a reminder, please link all of your k/k PR as well as docs PR to this issue for the release team to track.

[derekwaynecarr]

@annajung placeholder pr is kubernetes/website#24904