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page_title: Using Puppet page_description: Installing and using Puppet page_keywords: puppet, installation, usage, docker, documentation
Using Puppet
Note: Please note this is a community contributed installation path. The only
official
installation is using the Ubuntu installation path. This version may sometimes be out of date.
Requirements
To use this guide you'll need a working installation of Puppet from Puppet Labs .
The module also currently uses the official PPA so only works with Ubuntu.
Installation
The module is available on the Puppet Forge and can be installed using the built-in module tool.
$ puppet module install garethr/docker
It can also be found on GitHub if you would rather download the source.
Usage
The module provides a puppet class for installing Docker and two defined types for managing images and containers.
Installation
include 'docker'
Images
The next step is probably to install a Docker image. For this, we have a defined type which can be used like so:
docker::image { 'ubuntu': }
This is equivalent to running:
$ docker pull ubuntu
Note that it will only be downloaded if an image of that name does not already exist. This is downloading a large binary so on first run can take a while. For that reason this define turns off the default 5 minute timeout for the exec type. Note that you can also remove images you no longer need with:
docker::image { 'ubuntu':
ensure => 'absent',
}
Containers
Now you have an image where you can run commands within a container managed by Docker.
docker::run { 'helloworld':
image => 'ubuntu',
command => '/bin/sh -c "while true; do echo hello world; sleep 1; done"',
}
This is equivalent to running the following command, but under upstart:
$ docker run -d ubuntu /bin/sh -c "while true; do echo hello world; sleep 1; done"
Run also contains a number of optional parameters:
docker::run { 'helloworld':
image => 'ubuntu',
command => '/bin/sh -c "while true; do echo hello world; sleep 1; done"',
ports => ['4444', '4555'],
volumes => ['/var/lib/couchdb', '/var/log'],
volumes_from => '6446ea52fbc9',
memory_limit => 10485760, # bytes
username => 'example',
hostname => 'example.com',
env => ['FOO=BAR', 'FOO2=BAR2'],
dns => ['8.8.8.8', '8.8.4.4'],
}
Note: The
ports
,env
,dns
andvolumes
attributes can be set with either a single string or as above with an array of values.