Runner Delayed_job plugin with Daemon

Wokkers can be running in the background with daemon, following:

 > sudo gem install daemons

Create new file and paste these codes at the below

 /rails_app$ nano script/job_runner

#!/usr/bin/env ruby
require 'rubygems'
require 'daemons'

dir = File.expand_path(File.join(File.dirname(__FILE__), '..'))

daemon_options = {
  :multiple   => true,
  :dir_mode   => :normal,
  :dir        => File.join(dir, 'tmp', 'pids'),
  :backtrace  => true
}

Daemons.run_proc('job_runner', daemon_options) do
  if ARGV.include?('--')
    ARGV.slice! 0..ARGV.index('--')
  else
    ARGV.clear
  end

  Dir.chdir dir
  RAILS_ENV = ARGV[1] || ENV['RAILS_ENV'] || 'development'
  require File.join('config', 'environment')

  Delayed::Worker.new.start
end

To start daemon, running this code > ruby script/job_runner start ENV_NAME

 > ruby script/job_runner start development

Stop daemon, running this code > ruby script/job_runner stop ENV_NAME

 > ruby script/job_runner stop development