Top pods by restart count

Rank pods cluster-wide by restart count to spot crash loops fast

kubectl get po -A --sort-by='.status.containerStatuses[0].restartCount' | tail -20

More k8s-debug commands

Detect OOMKilled containers

kubectl get po -A -o jsonpath='{range .items[*]}{.metadata.namespace}{" "}{.metadata.name}{" "}{.status.containerStatuses[*].lastState.terminated.reason}{"\n"}{end}' | grep OOMKilled

List pods whose last container exit was OOMKilled across all namespaces
Pending pods scheduling reason

kubectl get po -A --field-selector=status.phase=Pending -o name | xargs -I{} kubectl describe {} -n <ns> | grep -A3 FailedScheduling

Extract FailedScheduling reasons for every Pending pod (taints, resources, affinity)
Node NotReady triage

kubectl describe node <node> | grep -A12 Conditions; ssh <node> 'journalctl -u kubelet -n 100 --no-pager'

Read node Conditions then tail kubelet journal to find why node is NotReady
ImagePullBackOff root cause

kubectl get events -n <ns> --field-selector reason=Failed -o wide | grep -i 'pull\|manifest\|unauthorized'

Surface registry pull failures: bad tag, missing imagePullSecret, or rate limit
Cleanup evicted pods

kubectl get po -A | grep Evicted | awk '{print $2" -n "$1}' | xargs -L1 kubectl delete po

Bulk-delete all Evicted pods left behind by node-pressure eviction