Use Docker containers on the fly is quite easy but sometimes container management by shell becomes difficult. For easily launch and restart your container, we can use a Systemd unit.

Create Unit file

In this example, I use a REDIS image that run with docker.
We need to create the file /etc/systemd/system/redis.service :

[Unit]
Description=Redis Service  
After=docker.service  
Requires=docker.service

[Service]
ExecStartPre=-/usr/bin/docker kill redis  
ExecStartPre=-/usr/bin/docker rm redis  
ExecStartPre=-/usr/bin/docker pull redis:latest
ExecStart=/usr/bin/docker run  -d --name redis --restart always redis:latest  
ExecStop=/usr/bin/docker stop redis

[Install]
WantedBy=multi-user.target  

This file will wait until the docker service is running then delete old redis container, pull last redis image and finally launch our container.

Let's enable redis.service and launch it :

systemctl enable redis
systemctl daemon-reload
systemctl start redis

Verify our container

After the systemctl start you can check your running container with docker ps :

Using with docker-compose

You can use a Systemd unit file for Docker-compose too like this :

ExecStartPre=-/usr/local/bin/docker-compose -f compose-file.yml down
ExecStart=/usr/local/bin/docker-compose -f compose-file.yml up -d
ExecStop=/usr/local/bin/docker-compose -f compose-file.yml stop

With this, you can start your stack of containers using Systemd.