capistrano-multiconfig

Description

Capistrano extension that allows to use multiple configurations.

Multiconfig extension is similar to multistage extenstion. But it's not only about 'stage' configurations. It's about any configuration that you may need. Extension recursively builds configuration list from configuration root directory. Each configuration loads recursively configuration from it namespace files and own configuration file.

Purpose

Extension was specially created to implement Caphub concept. Read more.

Usage

Install gem

$ gem install capistrano-multiconfig

Capistrano3

Use multiconfig v3.x.x

Replace capistrano/setup with capistrano/multiconfig in your Capfile:

# set :stages_root, 'config/deploy'
require 'capistrano/multiconfig'

Optionally you may set another path to your multistages configurations with :stages_root.

Capistrano2

For legacy capistrano v2.x.x use multiconfig gem v0.0.x

Add to Capfile

set :config_root, 'path/to/your/configurations'
require 'capistrano/multiconfig'

Example

Assume we need next configurations:

services:billing:production
services:billing:qa
blog:production
blog:staging
dev:wiki

Choose configuration root directory for example config/deploy

Create configuration files:

config/deploy/services/billing/production.rb
config/deploy/services/billing/qa.rb
config/deploy/blog/production.rb
config/deploy/blog/staging.rb
config/deploy/dev/wiki.rb

Add to Capfile:

require 'capistrano/multiconfig'

Put related capistrano configuration to each file according to file meaning.

Check tasks:

$ cap -T
cap services:billing:production # Load services:billing:production configuration
cap services:billing:qa         # Load services:billing:qa configuration
cap blog:production             # Load blog:production configuration
cap blog:staging                # Load blog:staging configuration
cap wiki                        # Load wiki configuration
cap invoke                      # Invoke a single command on the remote servers.
cap shell                       # Begin an interactive Capistrano session.

Let's try to run task without specified configuration:

$ cap shell
triggering start callbacks for `shell'
  * executing `multiconfig:ensure'
No configuration specified. Please specify one of:
  * wiki:production
  * wiki:staging
  * blog:production
  * blog:staging
(e.g. `cap wiki:production shell')

So we must provide configuration as first task:

$ cap services:billing:qa shell

Configuration Loading

Configuration task loads not only configuration associated with it filename. It also recursively load configurations from all namespaces.

For example task cap apps/blog/qa.rb loads with order next configuration files (if they exist):

config/deploy/apps.rb
config/deploy/apps/blog.rb
config/deploy/apps/blog/qa.rb

So it's easy to put shared configuration.

Custom stages configuration location

Specify in Capfile:

set :stages_root, 'deployment'
require 'capistrano/multiconfig'

Testing

$ bundle install
$ rspec -fs spec

Authors

Andriy Yanko