puma ruby on rails deployment

deploy.rb

set :puma_conf, "#{fetch(:deploy_to)}/current/config/puma.rb"

# default hook 끄고 항상 phased-restart (zero downtime)
namespace :puma do
        Rake::Task['check'].clear_actions
        Rake::Task['smart_restart'].clear_actions
end
after 'deploy:finished', 'puma:phased-restart'

puma.rb

RACK_ENV = ENV['RACK_ENV'] || 'production'
PREFIX = "/var/www/rails/#{RACK_ENV}"
CURRENT = "#{PREFIX}/current"
SHARED = "#{PREFIX}/shared"

environment "#{RACK_ENV}"
rackup "#{CURRENT}/config.ru"
pidfile "#{SHARED}/tmp/pids/puma.pid"
state_path "#{SHARED}/tmp/pids/puma.state"
stdout_redirect "#{SHARED}/log/puma_access.log", "#{SHARED}/log/puma_error.log", true

bind "unix://#{SHARED}/tmp/sockets/puma.sock"

threads 8, 32
workers 2