unicorns.cap

unicorns.cap

namespace :unicorns do
  def unicorn_command
    fetch(:unicorn_command, File.join(shared_path, "bin/unicorn_rails"))
  end

  def unicorn_pid_file
    fetch(:unicorn_pid_file, "/path/to/unicorn.pid")
  end

  def unicorn_config_file
    fetch(:unicorn_config_file, "config/unicorn.rb")
  end

  desc "Stop the unicorns"
  task :stop do
    on roles(:app) do
      begin
        execute "kill -QUIT `cat #{unicorn_pid_file}`"
      rescue
        # not running
      end
    end
  end

  desc "Start the unicorns"
  task :start do
    on roles(:app) do
      within release_path do
        execute unicorn_command, '-c', unicorn_config_file, '-D'
      end
    end
  end

  desc "Replace the unicorns (0-down-time deploy)"
  task :replace do
    on roles(:app) do
      begin
        execute "kill -USR2 `cat #{unicorn_pid_file}`"
      rescue
        # not running
      end
    end
  end

  desc "Hard restart the herd"
  task :restart => [ :stop, :start ]
end