Node.js + Express + Cluster をデプロイするためのCapistrano Recipe

deploy.rb

set :shared_children, %w(log pids sock node_modules)
set :node_path,       "/usr/local/bin"
set :node_app,        "app.js"

namespace :deploy do
  task :finalize_update, :except => { :no_release => true } do
    run "chmod -R g+w #{latest_release}" if fetch(:group_writable, true)
    run "rm -rf #{latest_release}/log #{latest_release}/node_modules #{latest_release}/tmp"
    run "mkdir -p #{latest_release}/tmp"

    run <<-CMD
      ln -s #{shared_path}/pids #{latest_release}/tmp/pids &&
      ln -s #{shared_path}/sock #{latest_release}/tmp/sock &&
      ln -s #{shared_path}/log #{latest_release}/log &&
      ln -s #{shared_path}/node_modules #{latest_release}/node_modules
    CMD
  end

  task :start, :roles => :app do
    run <<-CMD
      export PATH=#{node_path}:$PATH &&
      if [ -f #{shared_path}/pids/master.pid ]; \
      then echo "Server is already running!"; \
      else cd #{current_path} && nohup node app.js >/dev/null 2>&1 &
      fi
    CMD
  end

  task :restart, :roles => :app do
    run <<-CMD
      export PATH=#{node_path}:$PATH &&
      if [ -f #{shared_path}/pids/master.pid ]; \
      then cd #{current_path} && node app.js --restart; \
      else cd #{current_path} && nohup node app.js >/dev/null 2>&1 &
      fi
    CMD
  end

  task :stop, :roles => :app do
    run <<-CMD
      export PATH=#{node_path}:$PATH &&
      cd #{current_path} &&
      node app.js --shutdown &&
      rm #{shared_path}/pids/*.pid
    CMD
  end

  task :status, :roles => :app do
    run <<-CMD
      export PATH=#{node_path}:$PATH &&
      cd #{current_path} &&
      node app.js --status
    CMD
  end

  task :npm_install, :roles => :app do
    run <<-CMD
      export PATH=#{node_path}:$PATH &&
      cd #{latest_release} &&
      npm install
    CMD
  end
end

after 'deploy:finalize_update', 'deploy:npm_install'