Example Unicorn configuration file with Capistrano support

unicorn.rb

app_root = File.expand_path(File.dirname(__FILE__)).gsub('/config/unicorn', '')
 
working_directory app_root
 
pid "#{ app_root }/tmp/pids/unicorn.pid"
 
worker_processes 4
timeout          30
listen           9030
preload_app      true
 
before_fork do |server, worker|
  old_pid = "#{server.config[:pid]}.oldbin"
  if old_pid != server.pid
    begin
      sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
      Process.kill(sig, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
    end
  end
end
 
# Important if Capistrano destroy old releases 
before_exec do |server|
  ENV['BUNDLE_GEMFILE'] = "#{app_root}/Gemfile"
end
 
stderr_path "#{app_root}/log/unicorn.stderr.log"
stdout_path "#{app_root}/log/unicorn.stdout.log"