Automatically shut down after all docker containers have exited

docker-autosleep.sh

#!/bin/bash

set -euo pipefail

container_substring="something-greppable-in-the-name"

function check {
  docker ps | grep -v CONTAINER | grep -v ${container_substring}
}

until check; do
  echo "$(date) - checking"
  sleep 60
done

docker ps -a

echo "$(date) shutting down!"

sudo shutdown now