Capistrano 3 Monit Wrapper

Usage

Add the gem to your Gemfile

gem 'capistrano3-monit', github: 'naps62/capistrano3-monit'

Run bundle to update your Gemfile.lock Add the following to your Capfile:

require 'capistrano/monit'

The following tasks will be available to you:

monit:status  # shows the output of running `monit status` on the server
monit:start   # sends a start signal to all monitored processes
monit:stop    # sends a stop signal to all monitored processes
monit:restart # sends a restart signal to all monitored processes

Automatic restart

Until version 0.3.0, monit:restart would automatically be hooked into your deploy:restart task. Starting in 0.4.0, that is no longer the case.

If you want to achieve the same result, you can something like the following to your config/deploy.rb:

namespace :deploy do
  task :restart => 'monit:restart'
end

after 'deploy:publishing', 'deploy:restart'

How it works

Currently, the start|stop|restart tasks assume you only want to handle monitored processes related to the app being deployed. For this, the name of each process should contain the name of the application. For example, if you have the following configuration for your production stage:

# config/deploy/production.rb
set :application, 'production'

And if monit:status returns the following output:

Process 'production-puma'
  status             Does not exist
  monitoring status  Monitored
  data collected     Wed, 04 Dec 2013 23:24:51

Process 'production-redis'
  status             Does not exist
  monitoring status  Monitored
  data collected     Wed, 04 Dec 2013 23:24:51

Process 'staging-puma'
  status             Does not exist
  monitoring status  Monitored
  data collected     Wed, 04 Dec 2013 23:24:51

Process 'staging-redis'
  status             Does not exist
  monitoring status  Monitored
  data collected     Wed, 04 Dec 2013 23:24:51

Then launching the monit:start task will only handle the production-puma and production-redis processes.

Configuring sudo

If you don't want monit to be executed with sudo, add this to your config/deploy.rb:

set :execute_monit_without_sudo, true

TODO

• Add tasks to manage the monit service itself
• Allow a customizable list of processes to manage, instead of making assumptions based on their names

Contributing

This is a very early work, extracted from a specific project i'm working on. If you require a new feature, please open an issue, or preferably, a pull request with a proposed implementation