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