Capistrano deploy script for node.js

app.js

var express = require('express');

var app = express.createServer();

app.get('/', function(req, res){
  //the log will out put to log/{node_env}.log
  console.log("Method:" + req.method);
  //send text to agent
  res.send('Hello World. NODE_ENV=' + process.env.NODE_ENV);
});


//listening on application_port where set by capistrano
app.listen(process.argv[2] || 3000);

Capfile

load 'deploy' if respond_to?(:namespace) # cap2 differentiator
Dir['vendor/gems/*/recipes/*.rb','vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy' # remove this line to skip loading any of the default tasks
load 'config/node'

deploy.rb

##
# Capistrano tasks for Ubantu.
#
# Author: Shihua Ma http://f2eskills.com/

set :stages, %w[staging production]
set :default_stage, 'staging'
require 'capistrano/ext/multistage'
#application name
set :application, "example"
#start server script
set :node_file, "app.js"
#deploy host
set :host, "hostname"
#user name,must be a sudoer without prompting for password 
set :user, "username"
set :admin_runner, user


set :repository, "git@git@github.com:mashihua/Nodebot.git"
set :scm, :git
set :deploy_via, :remote_cache
role :app, host
set :use_sudo, true

namespace :deploy do
  
  desc "Start node server"
  task :start, :roles => :app, :except => { :no_release => true } do
    run "sudo start #{application}_#{node_env}"
  end
  
  desc "Stop node server"
  task :stop, :roles => :app, :except => { :no_release => true } do
    run "sudo stop #{application}_#{node_env}"
  end
  
  desc "Restart node server"
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "sudo restart #{application}_#{node_env} || sudo start #{application}_#{node_env}"
  end

  desc "Check required packages and install if packages are not installed"
  task :check_packages, roles => :app do
    run "cd #{release_path} && jake depends"
  end

  task :create_deploy_to_with_sudo, :roles => :app do
    run "sudo mkdir -p #{deploy_to}"
    run "sudo chown #{admin_runner}:#{admin_runner} #{deploy_to}"
  end

  desc "Update submodules"
  task :update_submodules, :roles => :app do
    run "cd #{release_path}; git submodule init && git submodule update"
  end
  
  task :write_upstart_script, :roles => :app do
    upstart_script = <<-UPSTART
description "#{application}"

start on startup
stop on shutdown

script
# We found $HOME is needed. Without it, we ran into problems
export HOME="/home/#{admin_runner}"
export NODE_ENV="#{node_env}"

cd #{current_path}
exec sudo -u #{admin_runner} sh -c "NODE_PATH=#{node_path} /usr/local/bin/node #{current_path}/#{node_file} #{application_port} >> #{shared_path}/log/#{node_env}.log 2>&1"
end script
respawn
UPSTART

  put upstart_script, "/tmp/#{application}_upstart.conf"
    run "sudo mv /tmp/#{application}_upstart.conf /etc/init/#{application}_#{node_env}.conf"
  end

end

before 'deploy:setup', 'deploy:create_deploy_to_with_sudo'
after 'deploy:setup', 'deploy:write_upstart_script'
after "deploy:finalize_update", "deploy:update_submodules", "deploy:check_packages"

Jakefile.js

var fs = require('fs');

desc('Check and install required packages');
task('depends', [], function (arg) {
    var npm = require('npm');
    npm.load({}, function (err) {
        if (err) return commandFailed(err);
        npm.on("log", function (message) { if(arg) console.log(message) })
        var requirements = JSON.parse(fs.readFileSync('config/requirements.json'));
        npm.commands.install(requirements, function (err, data) {
            if (err) return commandFailed(err);
        });
    });
}, true);

node.rb

##
# Custom installation tasks for Ubantu.
#
# Author: Shihua Ma http://f2eskills.com/


namespace :nodebot do
  
  namespace :install do
    
    desc "Install server software"
    task :default do
      setup
      
      git
      node
      npm
      jake
      tree
      httperf
      set_time_to_utc
    end
    
    task :setup do
      sudo "rm -rf src"
      run  "mkdir -p src"
    end
    
    desc "Install curl"
    task :curl do
      sudo "apt-get install curl"
    end
    
    desc "Install git"
    task :git do
      cmd = [
        "cd src",
        "wget http://ftp.ntu.edu.tw/pub2/software/scm/git/git-1.7.2.2.tar.gz",
        "tar xfz git-1.5.3.5.tar.gz",
        "cd git-1.5.3.5",
        "make prefix=/usr/local all",
        "sudo make prefix=/usr/local install"
      ].join(" && ")
      run cmd
    end
    
    desc "install node.js"
    task :node do
      cmd = [
        "cd src",
        "wget http://nodejs.org/dist/node-v0.4.12.tar.gz",
        "tar xfz node-v0.4.12.tar.gz",
        "cd node-v0.4.12",
        "./configure --prefix=/usr/local",
        "make",
        "sudo make install",
        "echo 'export NODE_PATH=/usr/local:/usr/local/lib/node_modules' >> ~/.bash_profile"
      ].join(" && ")
      run cmd
    end

    desc "install npm"
    task :npm do
      curl
      sudo "curl http://npmjs.org/install.sh | sh"
    end

    desc "install jake"
    task :jake do
      sudo "npm install jake -g"
    end
        
    desc "Install command-line directory lister"
    task :tree do
      cmd = [
        "cd src",
        "wget ftp://mama.indstate.edu/linux/tree/tree-1.5.3.tgz",
        "tar xfz tree-1.5.3.tgz",
        "cd tree-1.5.3",
        "make",
        "sudo make install"
      ].join(' && ')
      run cmd
    end
    
    desc "Install httperf"
    task :httperf do
      cmd = [
        "cd src",
        "wget ftp://ftp.hpl.hp.com/pub/httperf/httperf-0.9.0.tar.gz",
        "tar xfz httperf-0.9.0.tar.gz",
        "cd httperf-0.9.0",
        "./configure --prefix=/usr/local",
        "make",
        "sudo make install"
      ].join(' && ')
      run cmd
    end
    
    desc "Set time to UTC"
    task :set_time_to_utc do
      sudo "ln -nfs /usr/share/zoneinfo/UTC /etc/localtime"
    end
    
  end

end

production.rb

set :node_env, "production"
#git repos branch
set :branch, "production"
#listing port
set :application_port, "1604"
#deploy path
set :deploy_to, "/srv/www/apps/#{application}/#{node_env}"

requirements.json

[ "express@2.4.7"]

staging.rb

set :node_env, "staging"
#git repos branch
set :branch, "master"
#listing port
set :application_port, "1603"
#deploy path
set :deploy_to, "/srv/www/apps/#{application}/#{node_env}"