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- :title: Automatically Start Containers
- :description: How to generate scripts for upstart, systemd, etc.
- :keywords: systemd, upstart, supervisor, docker, documentation, host integration
- Automatically Start Containers
- ==============================
- You can use your Docker containers with process managers like ``upstart``,
- ``systemd`` and ``supervisor``.
- Introduction
- ------------
- If you want a process manager to manage your containers you will need to run
- the docker daemon with the ``-r=false`` so that docker will not automatically
- restart your containers when the host is restarted.
- When you have finished setting up your image and are happy with your
- running container, you may want to use a process manager to manage
- it. When your run ``docker start -a`` docker will automatically attach
- to the process and forward all signals so that the process manager can
- detect when a container stops and correctly restart it.
- Here are a few sample scripts for systemd and upstart to integrate with docker.
- Sample Upstart Script
- ---------------------
- In this example we've already created a container to run Redis with an id of
- 0a7e070b698b. To create an upstart script for our container, we create a file
- named ``/etc/init/redis.conf`` and place the following into it:
- .. code-block:: bash
- description "Redis container"
- author "Me"
- start on filesystem and started docker
- stop on runlevel [!2345]
- respawn
- script
- # Wait for docker to finish starting up first.
- FILE=/var/run/docker.sock
- while [ ! -e $FILE ] ; do
- inotifywait -t 2 -e create $(dirname $FILE)
- done
- /usr/bin/docker start -a 0a7e070b698b
- end script
- Next, we have to configure docker so that it's run with the option ``-r=false``.
- Run the following command:
- .. code-block:: bash
- $ sudo sh -c "echo 'DOCKER_OPTS=\"-r=false\"' > /etc/default/docker"
- Sample systemd Script
- ---------------------
- .. code-block:: bash
- [Unit]
- Description=Redis container
- Author=Me
- After=docker.service
- [Service]
- Restart=always
- ExecStart=/usr/bin/docker start -a 0a7e070b698b
- ExecStop=/usr/bin/docker stop -t 2 0a7e070b698b
- [Install]
- WantedBy=local.target
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