Stale Controller Mitigation

[michaelasp]

Enhancement Description

• One-line enhancement description (can be used as a release note): Add metrics to track stale KCM controllers
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/5647-stale-controller-handling/README.md
• Discussion Link: Sig API Machinery https://docs.google.com/document/d/1x9RNaaysyO0gXHIr1y50QFbiL1x8OWnk2v3XnrdkT5Y/edit?tab=t.0#heading=h.hw1pc91j5zaj
• PRs by stage and milestone:
  • Beta - v1.36
    • KEP (k/enhancements) update PR(s):
      • KEP-5647: Initial KEP for Stale Controller Mitigation #5649
      • KEP-5647: Add additional feature gates for stale controller mitigation #5820
    • Code (k/k) update PR(s):
      • Add atomic replace in client-go kubernetes#135462
      • Add atomic resync operation for real fifo kubernetes#136008
      • Add Resource Version query and Bookmarks to thread safe store kubernetes#134827
      • Add metric tracking the latest cached rv of informers kubernetes#137419
      • Daemonset controller staleness detection kubernetes#134937
      • Add the ability for the statefulset controller to read its own writes kubernetes#137254
      • Add the ability for the replicaset controller to read its own writes kubernetes#137212
      • Add the ability for the job controller to read its own writes kubernetes#137210
      • Ensure that processing does not block queue writers in RealFIFO kubernetes#136264
    • Docs (k/website) update PR(s):
      • KEP-5647: Stale informer docs website#52901
      • Add blog for stale controller mitigation website#54792

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

[michaelasp]

/sig api-machinery

[michaelasp]

/assign @michaelasp

[jpbetz]

/label lead-opted-in

[serathius]

KEP was merged as implementable state with alpha targeting 1.35

/stage alpha
/milestone v1.35