Run A Command Against a Collection of Kubernetes Resources

gistfile1.txt

# An example of running a command against each persistantvolume of a given storage class in CoolBrosNetes

# Grab the JSON to parse from k8s
kubectl get pv -o json > pv.json

# Parse the JSON with jq and run that shit
jq -r '.items[] | select(.spec.storageClassName=="my-storage-class") | [.metadata.name] | @tsv' pv.json |
  while IFS=$'\t' read -r name; do
    echo The name is $name
  done
  
# Delete all Released or Failed pvs

kubectl get pv -o json > pv.json

jq -r '.items[] | select((.status.phase=="Released") or .status.phase=="Failed") | [.metadata.name] | @tsv' pv.json |
  while IFS=$'\t' read -r name; do
    kubectl delete pv $name
  done