helpful kubernetes commands

get the IP addresses of a pod or pods
kubectl get pods [POD] -o=custom-columns=NAME:.metadata.name,PODIP:.status.podIP

get the name of the node a pod is scheduled on
kubectl get pods [POD] -o=custom-columns=name:.metadata.name,node:.spec.nodeName

get the resource requests and limits for a deployment
kubectl get deployment [DEPLOYMENT] -o go-template --template="{{range .spec.template.spec.containers}}{{printf \"%s %s\n\" .name .resources}}{{end}}"

get pods that have a >0 restart count
kubectl get --no-headers pods [POD] | awk '$4 > 0 {printf "%s %d\n",$1,$4}'

get pod ephemeral storage use on a node or nodes
for node in $(kubectl get --no-headers nodes [NODE] | awk '{print $1}'); do kubectl get --raw "/api/v1/nodes/${node}/proxy/stats/summary" | python3 -c """
import sys, json
for pod in json.load(sys.stdin)['pods']:
  print(f'{pod[\"podRef\"][\"name\"]} {pod[\"ephemeral-storage\"][\"usedBytes\"]/1048576:.2f}Mi')
"""; done