Unicorn Config

unicorn.rb

# Set user
user "deployer"

# Set production environment
ENV['RAILS_ENV'] = 'production'

# Set incoming port
listen 3000

# Set worker processes
worker_processes 2

# Reduce timeout from 60
timeout 30

# Optimize for copy on write
preload_app true

# Save the PID
pid "tmp/pids/unicorn.pid"

# Prevent shared resources due to forking

before_fork do |server, worker|
  ActiveRecord::Base.connection.disconnect! if defined?(ActiveRecord::Base)
  $redis.client.disconnect if defined?($redis)

  # Kill the old process if it exists
  old_pid = "tmp/pids/unicorn.pid.oldbin"
  if File.exists?(old_pid) && server.pid != old_pid
    begin
      Process.kill("QUIT", File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
      puts "Old master already quit"
    end
  end
end

after_fork do |server, worker|
  ActiveRecord::Base.establish_connection if defined?(ActiveRecord::Base)
  $redis.client.reconnect if defined?($redis)
end