application/recipes/unicorn.rb

#
# Cookbook Name:: application
# Recipe:: unicorn 
#
# Copyright 2009, Opscode, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

app = node.run_state['current_app'] 

include_recipe "unicorn"

node.default['unicorn']['worker_timeout'] = 60
node.default['unicorn']['preload_app'] = false
node.default['unicorn']['worker_processes'] = [node['cpu']['total'].to_i * 4, 8].min
node.default['unicorn']['preload_app'] = false
node.default['unicorn']['before_fork'] = 'sleep 1' 
node.default['unicorn']['port'] = '8080'
node.set['unicorn']['options'] = { :tcp_nodelay => true, :backlog => 100 }

unicorn_config "/etc/unicorn/#{app['id']}.rb" do
  listen({ node['unicorn']['port'] => node['unicorn']['options'] })
  working_directory ::File.join(app['deploy_to'], 'current')
  worker_timeout node['unicorn']['worker_timeout'] 
  preload_app node['unicorn']['preload_app'] 
  worker_processes node['unicorn']['worker_processes']
  before_fork node['unicorn']['before_fork'] 
end

runit_service app['id'] do
  template_name 'unicorn'
  cookbook 'application'
  options(
    :app => app,
    :rails_env => node.run_state['rails_env'] || node.chef_environment,
    :smells_like_rack => ::File.exists?(::File.join(app['deploy_to'], "current", "config.ru"))
  )
  run_restart false
end

if ::File.exists?(::File.join(app['deploy_to'], "current"))
  d = resources(:deploy_revision => app['id'])
  d.restart_command do
    execute "/etc/init.d/#{app['id']} hup"
  end
end