How can you automate container restart in case of crash?

To automate the restart of a container upon its crash in Docker, you can use the --restart parameter when starting the container.

Main options for the --restart value:

• no — do not restart the container (default).
• on-failure — restart the container only if it exits with an error (non-zero exit code).
• always — always restart the container, regardless of the reason for stopping.
• unless-stopped — restart the container unless it was manually stopped.

Example of starting a container with automatic restart on failure:

docker run --restart on-failure:3 my-container-image

Here, the container will be restarted up to 3 times upon crash.

If using Docker Compose, you can add to docker-compose.yml:

restart: on-failure

This will automatically manage the container's lifecycle without additional intervention.