Tutorial: Unleash the Full Potential Of Kubernetes Scheduler: Configuration, Extension And Operation In Production
Talkat KubeCon + CloudNativeCon North America 2022 · on Wednesday, 2022-10-26· at 11:00· 330 AB, Huntington Place: 1 Washington Blvd·
summary
kube-scheduler internals and actionable knobs: shows a live demo that deploys a second scheduler with two profiles on a 3-worker kind/Minikube cluster and places 6 replicas as spread vs pack profiles (2/node vs all on one node). Explains plugin-based pipeline, nodeResourcesFit scoring (least vs most allocated and request-to-capacity curves), multipoint/plugin weights, configurable percentageOfNodesToScore, initial/max backoff, leader election, and which metrics and logs to inspect for slow or unschedulable pods.
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chapters (10)
- 0:00Welcome
- 1:47Scheduler lifecycle
- 8:05Internal workflow
- 9:07Scheduler configuration fundamentals
- 22:12Node resource fit plugin
- 29:01Operating scheduler
- 37:11Debugging unscheduled pods
- 56:27Extending with plugins
- 1:12:30Plugin use cases
- 1:25:48Q&A
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