kubectl Cookbook

k.sh

# list pods only with enabled service links.
kgpoall -o jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{.spec.enableServiceLinks}' | grep true

# list images used in containers (but not in initContainers!).
kubectl get pods --all-namespaces -o=jsonpath='{range .items[*]}{"\n"}{.metadata.namespace}{"/"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.name}{"="}{.image}{", "}{end}{end}' |sort
 
# list containers without memory limits
kubectl get pods --all-namespaces -o=jsonpath='{range .items[*]}{"\n"}{.metadata.name}{":\t"}{range .spec.containers[*]}{.resources.limits.memory}{", "}{end}{end}' |sort | grep 0,

# running a pod which immidiately exists - the restart policy is crticial
kubectl  run -ti jaeger-test --rm --restart=Never \
    --env="SPAN_STORAGE_TYPE=elasticsearch" --image jaegertracing/jaeger-query:1.31.0 -- --help

# running with a different command - notice the a leading slash in the argument will be MSYSed!
kubectl run -ti kruise-test --rm --restart=Never --image openkruise/kruise-manager:v1.0.1 --command -- \
    ./kruise-daemon --help

# using kubernetes api proxy to access https endpoints (in this case it fails as there is no way to pass a client certificate)
MSYS2_ARG_CONV_EXCL=--raw k get --raw='/api/v1/nodes/https:ip-10-0-10-114.eu-west-1.compute.internal:2379/proxy/metrics'