Exec into sidecar container

Open shell in a specific container of a multi-container pod

kubectl exec -it mypod -c sidecar-name -- /bin/sh

More k8s-debug commands

Check resource requests/limits

kubectl get pod mypod -o jsonpath='{range .spec.containers[*]}{.name}{"\t"}{.resources}{"\n"}{end}'

Show resource requests and limits for each container
Describe node conditions

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

Check node conditions: Ready, MemoryPressure, DiskPressure
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