Start Docker containers automatically after reboot

There are several restart policies in Docker. These are used to restart the containers in case that they crash or even after a reboot.

To run a new container with these options use:

docker run -d --restart unless-stopped {{ container_image }}

If you have an already running container - to change the restart policy use:

docker update --restart unless-stopped {{ container_id }}

Next, if you run a docker inspect and look up for RestartPolicy, it should be listed under Name field. To quickly get it:

$ docker inspect {{ container_id }} | grep -A2 RestartPolicy
            "RestartPolicy": {
                "Name": "unless-stopped",
                "MaximumRetryCount": 0