Sample Unicorn.rb File

gistfile1.rb

#see https://devcenter.heroku.com/articles/rails-unicorn#the-unicorn-server

worker_processes ENV['WEB_CONCURRENCY'].to_i > 0 ?  ENV['WEB_CONCURRENCY'].to_i : 3
timeout ENV['REQUEST_TIMEOUT'].to_i > 0 ?  ENV['REQUEST_TIMEOUT'].to_i : 15
preload_app true

before_fork do |server, worker|

  Signal.trap 'TERM' do
    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
    Process.kill 'QUIT', Process.pid
  end

  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.connection.disconnect!
    Rails.logger.info('Disconnected from ActiveRecord')
  end


end

after_fork do |server, worker|

  Signal.trap 'TERM' do
    puts 'Unicorn worker intercepting TERM and doing nothing. Wait for master to sent QUIT'
  end

  if defined?(ActiveRecord::Base)
    config = Rails.application.config.database_configuration[Rails.env]
    config['reaping_frequency'] = ENV['DB_REAP_FREQ'] || 10
    config['pool']              = ENV['DB_POOL'] || 2
    ActiveRecord::Base.establish_connection(config)
    Rails.logger.info('Connected to ActiveRecord')
  end


end