text: #!/usr/bin/env bash
  
  set -e
  
  # Extract "host" and "key_file" argument from the input into HOST shell variable
  eval "$(jq -r '@sh "HOST=\(.host) KEY=\(.key)"')"
  
  # Fetch the join command
  CMD=$(ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i $KEY \
      root@$HOST kubeadm token create --print-join-command)
  
  # Produce a JSON object containing the join command
  jq -n --arg command "$CMD" '{"command":$command}'
  