Ephemeral debug copy with shared PIDs kubectl
Clone pod with a debug container sharing the PID namespace; original stays untouched
kubectl debug <pod> -n <ns> --copy-to=<pod>-dbg --share-processes --image=nicolaka/netshoot -- sleep infinity
more kubectl
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Explain deployment spec recursively
kubectl explain deploy.spec --recursive | less
Pause and resume a rollout
kubectl rollout pause deploy/<name> -n <ns>; kubectl rollout resume deploy/<name> -n <ns>
View last applied configuration
kubectl apply view-last-applied deploy/<name> -n <ns> -o yaml
Warning events across all namespaces
kubectl get events -A --field-selector type=Warning --sort-by=.lastTimestamp
Find all failed pods cluster-wide
kubectl get pods -A --field-selector status.phase=Failed