text: #!/usr/bin/env bash
  
  set -eo pipefail
  
  this=`basename $0`
  
  show_help() {
  cat << EOF
      Usage: $this [-a APPLICATION_NAME]
      Clean-up pods with and without discovery enabled for the specified application.
  
      -a APPLICATION_NAME     clean-up the pods with APPLICATION_NAME application.
                              APPLICATION_NAME can be one of parsec or cloverleaf.
  EOF
  }
  
  if [ $# -eq 0 ]
  then
      show_help
      exit 1
  fi
  
  app="parsec"
  
  OPTIND=1
  options="ha:"
  while getopts $options option
  do
      case $option in
          a)
              if [ "$OPTARG" == "parsec" ] || [ "$OPTARG" == "cloverleaf" ]
              then
                  app=$OPTARG
              else
                  echo "Invalid application name."
                  show_help
                  exit 0
              fi
              ;;
          h)
              show_help
              exit 0
              ;;
          '?')
              show_help
              exit 1
              ;;
     esac
  done
  
  echo "Using application name = $app."
  for i in {1..10}
  do
      kubectl delete po demo-$app-$i-wo-discovery
  done
  
  for i in {1..10}
  do
      kubectl delete po demo-$app-$i-with-discovery
  done
  