Allow zero value for Sleep Action of PreStop Hook

[sreeram-venkitesh]

Enhancement Description

• One-line enhancement description (can be used as a release note): Allows PreStop lifecycle handler's sleep action to have a zero value
• Kubernetes Enhancement Proposal: WIP: https://docs.google.com/document/d/1o01gH2ELPY-kjwgemjg3BbWiykx37ag-4VYwwJ1jBTw/edit?usp=sharing
• Discussion Link: Discussion in the GitHub thread of original KEP.
• Primary contact (assignee): @sreeram-venkitesh
• Responsible SIGs: sig-node
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.32
  • Beta release target (x.y):
  • Stable release target (x.y):
• [ ] Alpha
  • [ ] KEP (k/enhancements) update PR(s): https://github.com/kubernetes/enhancements/pull/4855
  • [ ] Code (k/k) update PR(s): https://github.com/kubernetes/kubernetes/pull/127094
  • [ ] 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.

[sreeram-venkitesh]

/sig node