CentOS 7 systemd script to start/stop docker containers at boot

docker.database.service

# https://goldmann.pl/blog/2014/07/30/running-docker-containers-as-systemd-services/

[Unit]
Description=MariaDB container
Requires=docker.service
After=docker.service

[Service]
User=php
Restart=always
RestartSec=10
# ExecStartPre=-/usr/bin/docker kill database
# ExecStartPre=-/usr/bin/docker rm database
ExecStart=/usr/bin/docker start -a database
ExecStop=/usr/bin/docker stop -t 2 database

[Install]
WantedBy=multi-user.target

To enable the service, you need to:

1. Create a container, like this:

docker run -d --name database -p 3306:3306 mysql/mysql-server:5.5

1. Copy the file to /etc/systemd/system/docker.database.service
2. Enable the service using systemctl enable docker.database.service

Notes:

1. Start the service using systemctl start docker.database.service
2. Any change to the service file requires systemctl daemon-reload

Don't forget to reboot the machine to test the script!