Capistrano tasks for starting unicorn

Capistrano tasks for starting unicorn.rb

set :rails_env, :production
set :unicorn_binary, "/usr/bin/unicorn"
# NOTICE: 不可在此外部使用 current_path，否则将会使用固定此文件下的 deploy_to 或默认的 deploy_to
# set :unicorn_config, "#{current_path}/config/unicorn.rb"
# set :unicorn_pid, "#{current_path}/tmp/pids/unicorn.pid"

namespace :deploy do
  task :start, :roles => :app, :except => { :no_release => true } do 
    unicorn_config = "#{current_path}/config/unicorn.rb"
    unicorn_pid = "#{current_path}/tmp/pids/unicorn.pid"

    run "cd #{current_path} && #{try_sudo} #{unicorn_binary} -c #{unicorn_config} -E #{rails_env} -D"
  end
  task :stop, :roles => :app, :except => { :no_release => true } do 
    unicorn_pid = "#{current_path}/tmp/pids/unicorn.pid"
    run "#{try_sudo} kill `cat #{unicorn_pid}`"
  end
  task :graceful_stop, :roles => :app, :except => { :no_release => true } do
    unicorn_pid = "#{current_path}/tmp/pids/unicorn.pid"
    run "#{try_sudo} kill -s QUIT `cat #{unicorn_pid}`"
  end
  task :reload, :roles => :app, :except => { :no_release => true } do
    unicorn_pid = "#{current_path}/tmp/pids/unicorn.pid"
    run "#{try_sudo} kill -s USR2 `cat #{unicorn_pid}`"
  end
  task :restart, :roles => :app, :except => { :no_release => true } do
    stop
    start
  end
end