http://blog.has-key.org/208 - 4. デプロイの準備

deploy.rb

require "capistrano_colors"
require "bundler/capistrano"

# RVM settings
# $:.unshift(File.expand_path("./lib", ENV["rvm_path"]))
require "rvm/capistrano"
set :rvm_type, :user
set :rvm_ruby_string, "1.9.3"

# Repository settings
default_run_options[:pty] = true
set :application, "{アプリケーション名}"
set :scm,         "git"
set :scm_verbose, false
set :repository,  "{gitリポジトリパス}"
set :branch,      "{ブランチ名}"
set :deploy_via,  :remote_cache
set :keep_releases, 3

# SSH settings
ssh_options[:forward_agent] = true
ssh_options[:paranoid]      = true
ssh_options[:port]          = {ポート番号}
ssh_options[:keys]          = "{SSH秘密鍵のパス}"
set :user,        "{ユーザ名}"
set :runner,      "{ユーザ名}"
set :use_sudo,    false
set :deploy_to,   "/var/www/#{application}"
set :rails_env,   "production"

# Role settings
set :domain, "{デプロイサーバのIPアドレス}"
role :web, domain
role :app, domain
role :db,  domain, :primary => true

# Assets settings
set :normalize_asset_timestamps, false
load "deploy/assets"

# Bundle settings
set :bundle_flags,  "--quiet"

# Capistrano task settings
namespace :deploy do
  task :start, :roles => :app do
    run "cd #{current_path};\
         bundle exec unicorn_rails -c config/unicorn.rb -E #{rails_env} -D"
  end
  task :stop, :roles => :app do
    run "kill -s QUIT `cat /tmp/unicorn_#{application}.pid`"
  end
  task :restart, :roles => :app do
    stop
    start
  end
  task :drop, :roles => :app do
    run "cd #{current_path};\
         bundle exec rake RAILS_ENV=production db:drop"
  end
  task :seed, :roles => :app do
    run "cd #{current_path};\
         bundle exec rake RAILS_ENV=production db:seed"
  end
  task :remigrate, :roles => :app do
    stop
    drop
    migrate
    start
  end
end

namespace :assets do
  task :precompile, :roles => :web do
    run "cd #{current_path} &&\
         RAILS_ENV=#{rails_env} bundle exec rake assets:precompile"
  end
  task :cleanup, :roles => :web do
    run "cd #{current_path} &&\
         RAILS_ENV=#{rails_env} bundle exec rake assets:clean"
  end
end

unicorn.rb

application = '{アプリケーション名}'

listen            "/tmp/unicorn_#{application}.sock"
pid               "/tmp/unicorn_#{application}.pid"
working_directory "/var/www/#{application}/current"
worker_processes  4
timeout           30

if ENV['RAILS_ENV'] == 'production'
  shared_path = "/var/www/#{application}/shared"
  stderr_path "#{shared_path}/log/unicorn.stderr.log"
  stdout_path "#{shared_path}/log/unicorn.stdout.log"
end

preload_app true
GC.respond_to?(:copy_on_write_friendly=) and GC.copy_on_write_friendly = true

before_fork do |server, worker|
  defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect!
  old_pid = "/tmp/unicorn_#{application}.pid.oldbin"
  if File.exists?(old_pid) && old_pid != server.pid
    begin
      Process.kill(:QUIT, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
    end
  end
  sleep 1
end

after_fork do |server, worker|
  defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection
end