Unicorn config for chef-solo

gistfile1.rb

app_root = '<%= node['app']['web_dir'] %>'
rails_root = "#{app_root}/current"
rails_env  = '<%= node['app']['env'] %>'
pid_file   = "#{app_root}/shared/tmp/pids/unicorn.pid"
socket_file= "#{app_root}/shared/tmp/sockets/unicorn.sock"
log_file   = "#{rails_root}/log/unicorn.log"
username   = '<%= node['user']['name'] %>'
group	   = '<%= node['user']['name'] %>'
old_pid    = "#{pid_file}.oldbin"

timeout <%= node['unicorn']['timeout'] %>

worker_processes <%= node['unicorn']['worker_processes'] %>

# Listen on a Unix data socket
listen socket_file, :backlog => 1024
pid pid_file

stdout_path log_file

preload_app true
##
# REE

GC.copy_on_write_friendly = true if GC.respond_to?(:copy_on_write_friendly=)

before_fork do |server, worker|
  # the following is highly recomended for Rails + "preload_app true"
  # as there's no need for the master process to hold a connection
  defined?(ActiveRecord::Base) and
    ActiveRecord::Base.connection.disconnect!


  ##
  # When sent a USR2, Unicorn will suffix its pidfile with .oldbin and
  # immediately start loading up a new version of itself (loaded with a new
  # version of our app). When this new Unicorn is completely loaded
  # it will begin spawning workers. The first worker spawned will check to
  # see if an .oldbin pidfile exists. If so, this means we've just booted up
  # a new Unicorn and need to tell the old one that it can now die. To do so
  # we send it a QUIT.
  #
  # Using this method we get 0 downtime deploys.

  if File.exists?(old_pid) && server.pid != old_pid
    begin
      Process.kill("QUIT", File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
      # someone else did our job for us
    end
  end
end


after_fork do |server, worker|
    if defined?(ActiveRecord::Base)
      ActiveRecord::Base.establish_connection
    end
    worker.user(username, group) if Process.euid == 0 && rails_env == '<%= node['app']['env'] %>'
    
    child_pid = server.config[:pid].sub(".pid", ".#{worker.nr}.pid")
    system("echo #{Process.pid} > #{child_pid}")
end

before_exec do |server|
  ENV["BUNDLE_GEMFILE"] = "#{rails_root}/Gemfile"
end