Configuration API

Before you can execute any commands, you need to specify your configuration options. Most of your configuration can be specified in config/deploy.rb. Any stage-specific configuration should be specified in config/deploy/[stage].rb

Global Options

set :application, "CoolTodoList"
set :app_key, 'ctl'

Param	Expected Value	Notes
application	String
app_key	String	Short string prepended to docker container names
registry	String	IP of docker registry
log_level	:debug, :info	:info recommended
images	Hash	Image configuration (see section)
container_types	Hash	Container type configuration (see section)
repos	Hash	Repository configuration (see section)
services	Hash	Services configuration (see section)

Images Options

The images hash defines the configuration for all the docker images defined for this application.

set :images, {
	api: {
		manifest: 'base-app',
		repos: {api: '/app'},
		available_services: ['unicorn', 'nginx'],
	},
	proxy: {
		manifest: 'base-proxy',
		services: ['haproxy']
	}
}

Param	Expected Value	Notes
manifest	String	Name of manifest to use (found in manifests directory)
repos	Hash	Name of repository to use (specified by symbol) with the value pointing to the path the repository should be stored to within the container
available_services	Array	Array of services that should be installed to the docker container, but not enabled (will be enabled selectively using the init script and environment variables)
services	Array	Array of services to be installed in the container and enabled

Container Type Options

The container_types option defines the configuration for all the docker container types for this application.

set :container_types, {
  api: {
    groups: [:api],
    image: :api,
    services: ['unicorn', 'nginx', 'heartbeat', 'app_reporter'],
    ports: { :app => {cport: 8080, hport: 8080} } # range implied
  },
  job: {
    groups: [:api],
    image: :api,
    services: ['job_processor', 'heartbeat', 'app_reporter']
  },
	proxy: {
		groups: [:proxy],
		ports: {proxy: {cport: 80, no_range: true} },
		hosts: ["sfa-host1"]
	}
}

Param	Expected Value	Notes
group	Array	Array of symbols (useful for deployment)
image	Symbol	Name of image to build container on top of
services	Array	Array of service names to enable during container init
ports	Hash	cport: container port (symbol) hport: host port no_range: if true, don't increment host port number by container instance number
volumes	Hash	cpath: container path to mount port

Repository Options

The repos option defines the configuration for all app repositories included in the docker images.

set :repos, {
	api: {
		url: 'git@github.com:jsmith/todolist_api.git',
		branch: 'master',
		scripts: [
			"bundle install --frozen --without development test",
			"bundle exec rake assets:precompile"
		]
	}
}

Param	Expected Value	Notes
url	String	Path to clone git repository
branch	String	Branch to deploy to image
scripts	Array	Array of commands to execute on repository after an update is performed

Services

The services option defines services that can be added to docker images.

set :services, {
	app_cron: "cd /app && bundle exec script/cron -D -e $RACK_ENV start",
	job_reporter: "cd /app && bundle exec script/job_processor -D -e $RACK_ENV start"
}