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Assuming the Docker daemon is restarted automatically by whatever init.d or systemd like process when the OS is restarted, what is the preferred way to restart one or more Docker containers? For example I might have a number of web servers behind a reverse proxy or a database server.
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Docker provides restart policies to control whether your containers start automatically when they exit, or when Docker restarts. Restart policies ensure that linked containers are started in the correct order. Docker recommends that you use restart policies, and avoid using process managers to start containers.
no Do not automatically restart the container. (the default) on-failure Restart the container if it exits due to an error, which manifests as a non-zero exit code. always Always restart the container if it stops.
Like the restart Docker command, Docker Compose includes the restart property to restart containers automatically.
if you start the daemon with docker -d -r, it will restart all containers that were running prior the daemon stopped. This will become the default behavior in the next release.
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CoreOS uses systemd to manage long running services:
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