Taint Based Eviction

[davidopp]

Feature Description

• One-line feature description (can be used as a release note):
• Primary contact (assignee): @gmarek
• Responsible SIGs: @kubernetes/sig-scheduling-feature-requests
• KEP: https://github.com/kubernetes/enhancements/blob/master/keps/sig-node/20200127-taint-based-evictions.md
• Reviewer(s) - (for LGTM) recommend having 2+ reviewers (at least one from code-area OWNERS file) agreed to review. Reviewers from multiple companies preferred:
• Approver (likely from SIG/area to which feature belongs):
• Feature target (which target equals to which milestone):
  • Alpha release target (x.y)
  • Beta release target (x.y) 1.13
  • Stable release target (x.y)

[davidopp]

This is finished except for documentation.

NoExecute taint effect is now in Beta (as part of moving taints/tolerations to Beta), and taint-based eviction for node problems is in Alpha.

The PRs involved were:

• Forgiveness api changes kubernetes#39469: Forgiveness (tolerationSeconds) API changes
• Forgiveness library changes kubernetes#39914: Forgiveness (tolerationSeconds) library changes
• add defaultTolerationSeconds admission controller kubernetes#41414 and enable DefaultTolerationSeconds admission controller by default kubernetes#41815: defaultTolerationSeconds admission controller
• Make DaemonSets survive taint-based evictions when nodes turn unreachable/notReady kubernetes#41896: Make DaemonSets survive taints
• TaintController kubernetes#40355: TaintController
• Promote taint helpers from e2e/framework to pkg/controller/controller_utils kubernetes#41014: Refactoring
• NodeController sets NodeTaints instead of deleting Pods kubernetes#41133: NodeController sets node taints instead of deleting pods
• Switch to SVG test-infra#197: Enable e2e test suite in Jenkins

[idvoretskyi]

@davidopp @gmarek @kevin-wangzefeng please, provide us with the release notes and documentation PR (or links) at the features spreadsheet.

[davidopp]

Documentation PR out for review at https://github.com/kubernetes/kubernetes.github.io/pull/2774/files

[davidopp]

ref/ kubernetes/kubernetes#43815 (comment)

[davidopp]

Regarding "taint-based eviction for node problems is in Alpha": nobody is available to move it to beta in 1.7, so it will stay in alpha in 1.7.

[gyliu513]

@davidopp I can help on this and target for 1.7, one question is that I saw kubernetes/kubernetes#40355 is already enabled by default, so can you please explain more for what do you mean by move this to beta in 1.7?