Shell script setup docker volume upon system start

setup-docker-volume.sh

#!/bin/bash

# save this script to setup-docker-volume.sh and chmod to allow executable (chmod +x setup-docker-volume.sh)
# Then add this entry to your crontab (generally at /var/spool/cron/root, /etc/cron.d, /etc/crontab)
# @reboot /path/to/setup-docker-volume.sh

set -e

wait_block() {
  printf .
  sleep 1
}

# ---------------------------------

echo
printf "waiting for docker to be up and running."

until docker version > /dev/null 2>&1; do wait_block; done

# ---------------------------------

echo
printf "waiting for docker-volume-glusterfs to be up and running."

until ps aux | grep -q '[d]ocker-volume-glusterfs'; do wait_block; done

# ---------------------------------

docker run --rm --volume-driver glusterfs --volume uploads:/data alpine sh -c "exit"
docker run --rm --volume-driver glusterfs --volume public_upload:/data alpine sh -c "exit"
docker start nginx