663551bebd
Automatic merge from submit-queue (batch tested with PRs 66916, 67252, 67794, 67619, 67328). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Fix HPA sample sanitization **What this PR does / why we need it**: @mwielgus pointed out a case when HPA fails as a result of my changes to HPA algorithm: - Have pods that use a lot of CPU during initilization, become ready right after they initialize, - Trigger a scale up, - When new pods become ready will will count their usage (even though it's not related to any work that needs doing), - This triggers another scale up, even though existing pods can handle work, no problem. The fix is: - Use all samples for non-cpu metrics. - Only use CPU samples if: - Pod is ready and was started more than 2 minutes ago, or - Pod is unready and last readiness change happened more than 10s after it was started. Reasoning behind this in: https://docs.google.com/document/d/1UdtYedhmCxjaJIQi6hwJMY0eHQQKxlVD8lSHZC1BPOA/edit **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: **Special notes for your reviewer**: **Release note**: ```release-note Replace scale up forbidden window with disregarding CPU samples collected when pod was initializing. ```
Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
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