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Classroom Contents
How the OOM-Killer Deleted My Namespace, and Other Kubernetes Tales
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- 1 Intro
- 2 Datadog
- 3 Symptoms
- 4 Investigation
- 5 Deletion call, 4d before Audit logs for the namespace
- 6 Spinnaker deploys (v1)
- 7 Helm 3 deploys (v2)
- 8 Big difference
- 9 What happened?
- 10 Namespace Controller logs Virtual
- 11 Events so far
- 12 Metrics-server setup
- 13 Metrics-server deployment
- 14 Full chain of events
- 15 Key take-away Apiservice extensions are great but can impact your cluster
- 16 Context
- 17 Runtime is down?
- 18 CNI status
- 19 Containerd goroutine dump Blocked goroutines?
- 20 Seems CNI related
- 21 What about Delete?
- 22 CNI plugin
- 23 The root cause
- 24 What we know
- 25 Apiserver requests
- 26 Illustration
- 27 What about label filters?
- 28 Informers instead of List How do informers work?
- 29 Back to the incident
- 30 Nodegroup controller?
- 31 How did it work?
- 32 What we learned
- 33 Conclusion
