Cloudn上にCapistrano3を使ってNginx+unicorn+Railsアプリをデプロイしてみた ref: http://qiita.com/t_oginogin/items/7e81582329925bec59a4

awesome_events

upstream app_server {
    server 127.0.0.1:8080 fail_timeout=0;
}

server {
    listen 80;
    listen [::]:80 default ipv6only=on;
    server_name awesome_events;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_redirect off;

        if (!-f $request_filename) {
            proxy_pass http://app_server;
            break;
        }
    }
}

Capfile

# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'

# Includes tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
#   https://github.com/capistrano/rvm
#   https://github.com/capistrano/rbenv
#   https://github.com/capistrano/chruby
#   https://github.com/capistrano/bundler
#   https://github.com/capistrano/rails
#
# require 'capistrano/rvm'
require 'capistrano/rbenv'
set :rbenv_type, :user
set :rbenv_ruby, '2.1.2'
# require 'capistrano/chruby'
require 'capistrano/bundler'
require 'capistrano/rails/assets'
require 'capistrano/rails/migrations'

# Loads custom tasks from `lib/capistrano/tasks' if you have any defined.
Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r }

database.yml

:
staging:
  <<: *default
  database: db/staging.sqlite3
:

deploy.rb

# config valid only for Capistrano 3.1
lock '3.2.1'

set :application, 'awesome_events'
set :repo_url, 'https://github.com/t-oginogin/awesome_eventes.git'

# Default branch is :master
# ask :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }.call
set :branch, :master

# Default deploy_to directory is /var/www/my_app
set :deploy_to, '/var/www/awesome_events'

# Default value for :scm is :git
set :scm, :git

# Default value for :format is :pretty
# set :format, :pretty

# Default value for :log_level is :debug
set :log_level, :debug

# Default value for :pty is false
set :pty, true

# Default value for :linked_files is []
# set :linked_files, %w{config/database.yml}

# Default value for linked_dirs is []
set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system public/assets}

# Default value for default_env is {}
set :default_env, { path: "/usr/local/rbenv/shims:/usr/local/rbenv/bin:$PATH" }

# Default value for keep_releases is 5
set :keep_releases, 5

namespace :deploy do

  desc 'Restart application'
  task :restart do
    invoke 'unicorn:restart'
  end

  after :publishing, :restart

end

file0.txt

ISO またはテンプレートの選択:テンプレート
テンプレート：Ubuntu Server v14.04 64bit
仮想サーバープラン：t1.micro
データディスク：設定しない
セキュリティグループ：testapp
名前：testapp

file1.txt

sudo apt-get update
sudo apt-get install -y build-essential wget curl git
sudo apt-get install -y zlib1g-dev libssl-dev libreadline-dev libyaml-dev libxml2-dev libxslt-dev
sudo apt-get install -y sqlite3 libsqlite3-dev
sudo apt-get clean

sudo rm /etc/localtime
sudo ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

git clone https://github.com/sstephenson/ruby-build.git .ruby-build
sudo .ruby-build/install.sh
rm -fr .ruby-build

sudo ruby-build 2.1.2 /usr/local

git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
source ~/.bash_profile
rbenv install 2.1.2
rbenv global 2.1.2

gem update --system
gem install bundler --no-rdoc --no-ri
rbenv rehash

file15.txt

sudo aptitude -y install nginx
cd /etc/nginx/sites-available
sudo rm default ../sites-enabled/default

file17.txt

sudo ln -s /etc/nginx/sites-available/awesome_events /etc/nginx/sites-enabled/
sudo service nginx restart

file18.txt

sudo mkdir /var/www
sudo chown ubuntu /var/www
sudo chgrp ubuntu /var/www
sudo chmod +rwx /var/www

file19.txt

bundle exec cap staging deploy AWESOME_ADDRESS=xxx.xxx.xxx.xxx AWESOME_USER=ubuntu  AWESOME_PASS=your_password

file8.txt

ENV['BUNDLE_GEMFILE'] = File.expand_path('Gemfile', ENV['RAILS_ROOT'])

file9.txt

old_pid = "#{server.config[:pid]}.oldbin"
  if old_pid != server.pid
    begin
      sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
      Process.kill(sig, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
    end
  end

Gemfile

group :development, :test do
  gem 'capistrano', :require => false
  gem 'capistrano-rails', :require => false
  gem 'capistrano-rbenv', :require => false
  gem 'capistrano-bundler', :require => false
end

secrets.yml

:
staging:
  secret_key_base: xxxxxxxxxxxxxx
  <<: *default_twitter
:

staging.rb

set :stage, :staging
#
# Simple Role Syntax
# ==================
# Supports bulk-adding hosts to roles, the primary server in each group
# is considered to be the first unless any hosts have the primary
# property set.  Don't declare `role :all`, it's a meta role.

role :app, %W{#{ENV['AWESOME_USER']}@#{ENV['AWESOME_ADDRESS']}}
role :web, %W{#{ENV['AWESOME_USER']}@#{ENV['AWESOME_ADDRESS']}}
role :db,  %W{#{ENV['AWESOME_USER']}@#{ENV['AWESOME_ADDRESS']}}


# Extended Server Syntax
# ======================
# This can be used to drop a more detailed server definition into the
# server list. The second argument is a, or duck-types, Hash and is
# used to set extended properties on the server.

server "#{ENV['AWESOME_ADDRESS']}", user: "#{ENV['AWESOME_USER']}", roles: %w{web app db}

# Custom SSH Options
# ==================
# You may pass any option but keep in mind that net/ssh understands a
# limited set of options, consult[net/ssh documentation](http://net-ssh.github.io/net-ssh/classes/Net/SSH.html#method-c-start).
#
# Global options
# --------------
set :ssh_options, {
#    keys: %w(/home/rlisowski/.ssh/id_rsa),
#    forward_agent: false,
  auth_methods: %w(password),
  password: ENV['AWESOME_PASS']
}
#
# And/or per server (overrides global)
# ------------------------------------
# server 'example.com',
#   user: 'user_name',
#   roles: %w{web app},
#   ssh_options: {
#     user: 'user_name', # overrides user setting above
#     keys: %w(/home/user_name/.ssh/id_rsa),
#     forward_agent: false,
#     auth_methods: %w(publickey password)
#     # password: 'please use keys'
#   }

unicorn.cap

namespace :unicorn do
  task :environment do
    set :unicorn_pid, "#{shared_path}/tmp/pids/unicorn.pid"
    set :unicorn_config, "#{current_path}/config/unicorn/#{fetch(:rails_env)}.rb"
  end

  def start_unicorn
    within current_path do
      execute :bundle, :exec, :unicorn_rails, "-c #{fetch(:unicorn_config)} -E #{fetch(:rails_env)} -p 8080 -D"
    end
  end

  def stop_unicorn
    execute :kill, "-s QUIT $(< #{fetch(:unicorn_pid)})"
  end

  def reload_unicorn
    execute :kill, "-s USR2 $(< #{fetch(:unicorn_pid)})"
  end

  def force_stop_unicorn
    execute :kill, "$(< #{fetch(:unicorn_pid)})"
  end

  desc "Start unicorn server"
  task :start => :environment do
    on roles(:app) do
      start_unicorn
    end
  end

  desc "Stop unicorn server gracefully"
  task :stop => :environment do
    on roles(:app) do
      stop_unicorn
    end
  end

  desc "Restart unicorn server gracefully"
  task :restart => :environment do
    on roles(:app) do
      if test("[ -f #{fetch(:unicorn_pid)} ]")
        reload_unicorn
      else
        start_unicorn
      end
    end
  end

  desc "Stop unicorn server immediately"
  task :force_stop => :environment do
    on roles(:app) do
      force_stop_unicorn
    end
  end
end