Kubernetes
Kubernetes installation, networking and operations.
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[Kubernetes Lab 09] Diagnose Pod Failures and Drain a Node
Use Pod events, logs and node conditions to diagnose a failure, then drain and return a worker node to service.
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[Kubernetes Lab 10] Restore etcd and Application Files; Apply Patch Upgrades
Back up and restore etcd and local PV files separately, then follow the patch upgrade order for a single-control-plane Kubernetes lab.
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Troubleshooting CoreDNS Resolution Failures in Kubernetes
Trace Kubernetes DNS failures from Pod resolver settings to CoreDNS endpoints, upstream resolvers, and NetworkPolicy rules.