Monit template files

redis.erb

check process redis
  start program = "/usr/bin/redis-server /etc/redis/redis.conf"
  stop program = "/usr/bin/redis-cli -p 6379 shutdown"
  with pidfile /var/run/redis.pid

redis.rb

# /config/initializers/redis.rb

$redis = Redis.new

sidekiq.erb

check process sidekiq with pidfile <%= sidekiq_pid %>
  start program = "/etc/init.d/sidekiq_<%= application %> start"
  stop program = "/etc/init.d/sidekiq_<%= application %> stop"
  if totalmem is greater than 200 MB for 2 cycles then restart

unicorn.rb.erb

working_directory "<%= current_path %>"
pid "<%= unicorn_pid %>"
stderr_path "<%= unicorn_log %>"
stdout_path "<%= unicorn_log %>"

listen "/tmp/unicorn.<%= application %>.sock"
worker_processes <%= unicorn_workers %>
timeout 30

preload_app true

before_fork do |server, worker|
  # Disconnect since the database connection will not carry over
  if defined? ActiveRecord::Base
    ActiveRecord::Base.connection.disconnect!
  end

  # Quit the old unicorn process
  old_pid = "#{server.config[: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
      # someone else did our job for us
    end
  end
end

after_fork do |server, worker|
  # https://github.com/redis/redis-rb/blob/master/examples/unicorn/unicorn.rb
  # Redis.current.quit

  # https://github.com/mperham/sidekiq/wiki/Problems-and-Troubleshooting
  # Sidekiq.configure_client do |config|
  #   config.redis = { size: 1 }
  # end

  # Start up the database connection again in the worker
  if defined?(ActiveRecord::Base)
    ActiveRecord::Base.establish_connection
  end
end