Mongrel and Capistrano 2.0

I use Capistrano, and Mongrel. Mongrel comes prepackaged with capistrano 1.4 recipes for stopping and starting, making it a cinch to roll a new version and stop and start your service.

Capistrano 2.0 has just been released, and mongrel hasn't yet been updated. The solution is to roll your own tasks for mongrel. You can do this by adding the following to your project's deploy.rb file.

Update: minor bug fixed in code. Thanks to funkdoobiest for pointing it out.

Update: mongrel_conf may need to be defined in your deploy.rb as meekish points out in the comments.

set :mongrel_conf, "#{deploy_to}/current/config/mongrel_cluster.yml"


namespace :deploy do
  namespace :mongrel do
    [ :stop, :start, :restart ].each do |t|
      desc "#{t.to_s.capitalize} the mongrel appserver"
      task t, :roles => :app do
        #invoke_command checks the use_sudo variable to determine how to run the mongrel_rails command
        invoke_command "mongrel_rails cluster::#{t.to_s} -C #{mongrel_conf}", :via => run_method
      end
    end
  end

  desc "Custom restart task for mongrel cluster"
  task :restart, :roles => :app, :except => { :no_release => true } do
    deploy.mongrel.restart
  end

  desc "Custom start task for mongrel cluster"
  task :start, :roles => :app do
    deploy.mongrel.start
  end

  desc "Custom stop task for mongrel cluster"
  task :stop, :roles => :app do
    deploy.mongrel.stop
  end

end


Capistano already has tasks for deploy:restart, deploy:start, and deploy:stop. What the code above does is add the following tasks:


deploy:mongrel:start
deploy:mongrel:restart
deploy:mongrel:stop


It then overrides the default deploy:restart, deploy:start, and deploy:stop tasks to call the mongrel ones.

So now the following commands: stop, start and restart your mongrel servers respectively.

cap deploy:stop
cap deploy:start
cap deploy:restart