puma.rb

#!/usr/bin/env puma

environment 'staging'

pidfile "/myapp/tmp/pids_puma.pid"
state_path "/myapp/tmp/pids_puma.state"
stdout_redirect '/myapp/log/puma_access.log', '/myapp/log/puma_error.log', true

threads 2, 8

bind 'tcp://0.0.0.0:3000'

workers 2

prune_bundler

on_restart do
  puts 'Refreshing Gemfile'
  ENV['BUNDLE_GEMFILE'] = '/myapp/Gemfile'
end

on_worker_boot do |worker_index|
  # write worker pid
  pid_filename = "/myapp/tmp/pids_puma_worker_#{worker_index}.pid"
  File.open(pid_filename, 'w') { |f| f.puts Process.pid }
  begin
    # Re-open appenders after forking the process
    SemanticLogger.reopen if defined?( SemanticLogger )
  rescue Exception => e
    puts "Error trying to reopen log, probably because the SemanticLogger gem is not used in this project: #{e.message}"
  end
end

activate_control_app 'unix:///myapp/tmp/sockets_pumactl.sock'