Capistrano::DeployLocker

A capistrano plugin to make deployment with exclusive lock.

In other words, this protects any two processes from running cap deploy command at the same time.

Installation

Add this line to your application's Gemfile:

gem 'capistrano-deploy_locker'

And then execute:

$ bundle

Or install it yourself as:

$ gem install capistrano-deploy_locker

Configuration

Set Capistrano variables with set name, value.

Name	Default	Description
deploy_lock_key	`"#{fetch(:application)}.#{fetch(:stage)}"`	String to specify lock target
deploy_lock_dir	`./.lock`	Directory to write lockfile or other info
deploy_lock_user	`ENV['USER'] \|\| ENV['LOGIN']`	Who locks deploy
deploy_lock_reason	`"#{$0} #{ARGV}"`	Why deploy is locked

You can provide :deploy_lock_user and :deploy_lock_reason to show infomation of your deployment for other operators who try to get lock in fail.

Usage

Edit Capfile:

# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'

# Includes tasks from other gems included in your Gemfile
require 'capistrano/deploy_locker'

Edit your config/deploy.rb:

before 'deploy:starting', 'deploy:lock'
after 'deploy:finished', 'deploy:unlock'
after 'deploy:failed', 'deploy:unlock'

Alternatives

Here is a list of other libraries which provides similar functionarily:

License

Available as open source under the terms of the MIT License.