Delete kubernetes resources based on grep patterns

kube_delete

#!/bin/bash

print_usage() {
    echo "

///////////////////////////////////////////////////////
* Delete kubernetes resources based on grep patterns *
//////////////////////////////////////////////////////

Usage:
    kube_delete --resource=RESOURCE_TYPE --pattern=PATTERN

Example
    kube_delete --resource=pod --pattern=nginx

Required Parameters:

    --resource:           Type of resource. Example: pod, deployment etc.

Optional Parameters:
    --pattern:            A pattern suitable for grep command. If no pattern is provided, delete_resources
	 	  	  will try to delete all the instances of that resource type in the current namespace.
"
}

while [ $# -gt 0 ]; do
  case "$1" in
    -h|--help*)
      print_usage
      exit 0
      ;;
    --resource=*)
      resource="${1#*=}"
      ;;
    --pattern=*)
      pattern="${1#*=}"
      ;;
    *)
      printf "\nError: Invalid argument: $1\n"
      print_usage
      exit 1
  esac
  shift
done

if [[ -z $resource ]]; then
  echo "--resource flag is required"
  exit 1
fi

kubectl get $resource --no-headers | grep "$pattern" | awk '{print$1}' | xargs kubectl delete $resource