In-cluster DNS resolution test k8s-debug
Resolve a Service FQDN from an ephemeral pod to isolate CoreDNS vs app DNS issues
kubectl run dnstest --rm -it --image=nicolaka/netshoot --restart=Never -- dig +short <name>.<ns>.svc.cluster.local
more k8s-debug
all 27 commands →
Ordered events for a pod
kubectl events --for pod/<pod> -n <ns> --types=Warning
Previous crash logs with timestamps
kubectl logs <pod> -n <ns> -c <name> --previous --timestamps --tail=200
Ephemeral debug container
kubectl debug -it <pod> --image=nicolaka/netshoot -n <ns>
Node resource usage
kubectl top nodes
Pod resource usage sorted
kubectl top pods -A --sort-by=memory