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The unicorn cookbook has been deprecated

Author provided reason for deprecation:

The unicorn cookbook has been deprecated and is no longer being maintained by its authors. Use of the unicorn cookbook is no longer recommended.


unicorn (12) Versions 2.0.0

Installs and configures unicorn

cookbook 'unicorn', '= 2.0.0', :supermarket
cookbook 'unicorn', '= 2.0.0'
knife supermarket install unicorn
knife supermarket download unicorn
Quality -%


Installs and configures unicorn, and provides a definition to manage
configuration file for Rack apps running under unicorn.


Should work anywhere.



The unicorn_config definition manages the configuration template for
an application running under unicorn.


  • listen - Default is nil.
  • working_directory - Default is nil.
  • worker_timeout - Default is 60.
  • preload_app - Default is false.
  • worker_processes - Number of worker processes to spawn. Default is 4.
  • unicorn_command_line - If set, specifies the unicorn commandline to set in the config file. Usefull when sandboxing your unicorn installation.
  • forked_user - User to run children as. Default is nil.
  • forked_group - Group to run children as. You must specify a forked_user as well to use this attribute. Default is nil.
  • before_exec - Default is nil.
  • before_fork - Default is nil.
  • after_fork - Default is nil.
  • pid - Pidfile location. Default is nil.
  • stderr_path - Where stderr gets logged. Default is nil.
  • stdout_path - Where stdout gets logged. Default is nil.
  • notifies - How to notify another service if specified. Default is nil.
  • owner - Owner of the template. Default is nil.
  • group - group of the template. Default is nil.
  • mode - mode of the template. Default is nil.
  • unicorn_command_line - Specify the command-line for the unicorn binary as a string. Populates Unicorn::HttpServer::START_CTX[0]. Default is nil.
  • copy_on_write - Whether the app should take advantage of REE Copy On Write feature. Default is false.
  • enable_stats - Whether the app should have GC profiling enabled for instrumentation. Default is false.

For more information on copy_on_write and enable_stats, see:



Setting some custom attributes in a recipe (this is from Opscode's

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]

License and Author

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

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.

Dependent cookbooks

This cookbook has no specified dependencies.

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