Shell Script for delete the namespace if it is existed and waited till it complete-CodePudding

script will need to check if aaa-new-ui-dev and bbb-java-new-ui-dev namespace exist - and if it exists - it needs to delete them and wait until delete operation is complete

I am trying to create a shell script which check if namespace is exist and if it exists then it should delete the kubectl namespace.

CodePudding user response：

# For each namespace to delete.
for ns in aaa-new-ui-dev bbb-java-new-ui-dev ; do 
  # If 'get' returns 0, then the namespace exists. 
  if kubectl get namespace/$ns ; then
    # Issue delete. 
    kubectl delete namespace/$ns
    # Wait up to 30 seconds for deletion.
    kubectl wait --for=delete namespace/$ns --timeout=30s
  else
    # Get returned an error. Assume namespace does not exist.
    echo "$project does not exist; skipping delete"
  fi
done

CodePudding user response：

I just issue the deletion because there is not need to validate if exists.

Also I'm printing a dot just to have a visual idea of the wait command - it will print a dot each 0.1s until the deletion is complete

ns_to_delete=(aaa-new-ui-dev bbb-java-new-ui-dev)

# For each namespace to delete.
for ns in ${ns_to_delete[@]} ; do 
  if ! output=$(kubectl delete namespace/$ns 2>&1); then
    printf "$ns does not exists, not need to delete it\n" >&2
  else
    printf "Deleting $ns \n" >&2
    while sleep 0.1; do printf "."; done &
        kubectl wait --for=delete namespace/$ns
    kill $!
    echo "Deleted!"
  fi
done

Expected output assuming just aaa-new-ui-dev exists:

Deleting aaa-new-ui-dev 
...........Deleted!
bbb-java-new-ui-dev does not exists, not need to delete it