unicorn.rb example with redis

unicorn.rb

# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
# documentation.

worker_processes <%= fetch(:unicorn_workers) %>

listen "/tmp/unicorn.<%= fetch(:application) %>.sock", :backlog => 64
# listen 8080, :tcp_nopush => true

# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
  GC.copy_on_write_friendly = true

timeout 30

pid "<%= fetch(:unicorn_pid) %>"

check_client_connection false

working_directory "<%= current_path %>"

user 'rails', 'admin'

stderr_path "<%= fetch(:unicorn_log) %>"
stdout_path "<%= fetch(:unicorn_log) %>"

before_fork do |server, worker|

  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.connection.disconnect!
  end

  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

  sleep 1
end

after_fork do |server, worker|
  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.establish_connection
  end
  child_pid = server.config[:pid].sub(".pid", ".#{worker.nr}.pid")
  system("echo #{Process.pid} > #{child_pid}")

  Sidekiq.configure_client do |config|
    config.redis = { :size => 1 }
  end
end