chef-dokku

Manages a dokku installation, allowing configuration of application's environment variables, installation of plugins and management of ssh keys.

⚠️ This project is no longer being actively maintained ⚠️

This project is no longer being maintained and you might want to check out https://github.com/nickcharlton/dokku-cookbook

Usage

Include the bootstrap recipe in your run list to have dokku installed/updated during chef runs.

Docker

This cookbook does not handle aspects of the docker installation such as lxc support or storage drivers. Please refer to the docker cookbook for more information on the specifics of a docker install.

Attributes

These attributes are under the node['dokku'] namespace.

Attribute	Description	Type	Default
root	dokku's home directory	String	/home/dokku
domain	Domain name to write to ['dokku']['root]'/VHOST	String	nil (node['fqdn'] will be used)
ssh_keys	SSH keys that can push to dokku	Hash	{} see SSH Keys
plugins	Plugins to install	Hash with plugin name as key and GitHub repository URL as value	{} see Plugins
plugin_path	Directory where plugins are installed	String	/var/lib/dokku/plugins
apps	App environment settings to populate	Hash	{} see Apps
git_repository	The git repository for the base dokku code	String	https://github.com/progrium/dokku.git
git_revision	The git revision to check out from git_repository	String	v0.2.0

Configuration

While this cookbook will be able to provide you with a working dokku installation, there is some configuration you will likely want to do first:

SSH Keys

This is a required step to getting dokku working. You will want to set node['dokku']['ssh_keys'] to a hash of the following structure:

default['dokku']['ssh_keys'] = {
  'awesome_user' => 'awesome_users_pubkey',
  'superb_user' => 'superb_users_pubkey'
}

The ssh_keys recipe will handle setting up the keys for dokku

Apps

Pre-configured applications. These attributes are used to configure environment variables or remove an app:

default['dokku']['apps'] = {
  'cool_app' => {
    'env' => {
      'ENV_VAR' => 'ENV_VAR_VALUE',
      'ENV_VAR2' => 'ENV_VAR2_VALUE'
    },
    'tls' => {
      'cert_file' => '/etc/ssl/certs/my.pem',
      'key_file' => '/etc/ssl/private/my.key'
    }
  }
}

Both env and tls are optional.

To enable TLS connection to your application, use tls attribute. cert_file and key_file are the paths to .crt/.pem and .key files. The apps repice will create symlinks inside $APP_HOME/tls folder pointing to paths you've defined.

If you want to enable TLS connections for all applications at once, you can use certificate cookbook.

For more information, check out dokku documentation.

Plugins

You will likely want to install plugins to expand the functionality of your dokku installation. See the dokku wiki page for a list of available plugins.

Plugins are defined on the node['dokku']['plugins'] attribute:

default['dokku']['plugins'] = {
  'plugin_name' => 'plugin_repository_url',
  # For example:
  'postgresql' => 'https://github.com/Kloadut/dokku-pg-plugin'
}

Applications Attributes

These attributes are under the node['dokku']['apps']['YOUR_APP_NAME'] namespace.

Attribute	Description	Type	Default
env	Application's environment variables	Hash	nil
remove	Whether the application should be removed	Boolean	nil

Sync attributes

These attributes are under the node['dokku']['sync'] namespace. They control whether remote code bases will be updated on chef runs

Attribute	Description	Type	Default
base	Whether the dokku codebase will be synced with the remote repository	Boolean	true
plugins	Whether the dokku plugins will be synced with their remote repositories	Boolean	true
dependencies	Whether the sshcommand and pluginhook dependencies will be updated from their remotes	Boolean	true

Build Stack attributes

These attributes are under the node['dokku']['buildstack'] namespace. They correspond to the buildstep that is used by dokku.

Attribute	Description	Type	Default
image_name	The name of the image to use when importing into Docker	String	progrium/buildstep
use_prebuilt	Whether to use the prebuilt image or build off the git repository	Boolean	true
stack_url	The url to the buildstep git repository	String	github.com/progrium/buildstep
prebuilt_url	The url to the prebuild docker image for the buildstep	String	https://s3.amazonaws.com/progrium-dokku/progrium_buildstep_79cf6805cf.tgz

PluginHook Attributes

These attributes are under the node['dokku']['pluginhook'] namespace.

Attribute	Description	Type	Default
src_url	The source url for the pluginhook .deb file	String	https://s3.amazonaws.com/progrium-pluginhook/pluginhook_0.1.0_amd64.deb
filename	The pluginhook .deb file name	String	pluginhook_0.1.0_amd64.deb
checksum	The SHA-256 checksum for the pluginhook .deb file	String	26a790070ee0c34fd4c53b24aabeb92778faed4004110c480c13b48608545fe5

Recipes

• recipe[dokku] - Noop. Will be used to include LWRPs in the future
• recipe[dokku::bootstrap] - A chef version of bootstrap.sh. Include this recipe to have dokku installed/updated by chef
• recipe[dokku::install] - Clones/checks out the dokku git repository and copies the required files via make copyfiles
• recipe[dokku::buildstack] - Builds/imports the dokku buildstep docker image. See node['dokku']['buildstack']['use_prebuilt'] to set which buildstep is imported

Testing and Development

Vagrant

Here's how you can quickly get testing or developing against the cookbook thanks to Vagrant.

vagrant plugin install vagrant-omnibus
git clone git://github.com/fgrehm/chef-dokku.git
cd chef-dokku
bundle install
bundle exec berks install -p vendor/cookbooks
vagrant up

You can then SSH into the running VM using the vagrant ssh command.

The VM can easily be stopped and deleted with the vagrant destroy command. Please see the official Vagrant documentation for a more in depth explanation of available commands.

Roadmap

• Convert things like ssh keys, app env, etc to LWPRs w/ Chefspec v3 matchers
• Reduce rewritten/overridden areas of the bootstrap process to better keep up with dokku's rapid development
• Plugin removal
• Use dokku app removal process
• Support dokku addons