Describe node conditions

Check node conditions: Ready, MemoryPressure, DiskPressure

kubectl describe node my-node | grep -A5 'Conditions:'

More k8s-debug commands

Find pods by resource usage

kubectl top pods -A --sort-by=memory | head -20

Top 20 pods sorted by memory consumption
Watch pod events

kubectl get events -n mynamespace --field-selector involvedObject.name=mypod --watch

Stream events for a specific pod
Copy file from pod

kubectl cp mynamespace/mypod:/var/log/app.log ./app.log

Download a file from a running container
Top pods by restart count

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

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