To register a new service on Systemd create file
/etc/systemd/system/myapp.service with the following content.
Description=MyApp Requires=docker.service After=docker.service [Service] Restart=on-failure ExecStart=/usr/bin/docker run --name ping --rm -e HOSTNAME=google.com -e TIMEOUT=5 willfarrell/ping ExecStop=/usr/bin/docker stop ping [Install] WantedBy=multi-user.target
Where we indicate that
myapp requires docker to start. What this container is doing is simply pinging google every 5 seconds.
Now to start the service:
sudo systemctl start myapp
And to see if it is really working:
docker ps docker logs -f ping
If you want you can ask systemd to stop the service via:
sudo systemctl stop myapp
The final trick, is enable
myapp to run every time the system is booted:
sudo systemctl enable myapp.service