DND - blog post

00_rvm.sh

# Install RVM and dependencies
sudo aptitude install curl git-core
sudo bash < <( curl -L http://bit.ly/rvm-install-system-wide )
sudo aptitude install build-essential bison openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev
sudo adduser `whoami` rvm
echo 'source /usr/local/lib/rvm' >> ~/.bashrc
# Set up users and groups
sudo useradd --home /var/www --create-home --groups rvm unicorn && sudo chmod g+w /var/www
sudo adduser `whoami` unicorn
#
# >> Log out and back in to SSH, open a new shell, etc. -- something to reload your environment
#
# Install Ruby 1.9.2-p136 and make it default
rvm install ruby-1.9.2-p136
# Make a sandwich while you wait (or have someone make you one: http://xkcd.com/149/)
rvm use ruby-1.9.2-p136 --default

01_nginx.sh

# Install Nginx
sudo bash -c 'echo "deb http://ppa.launchpad.net/nginx/stable/ubuntu $(lsb_release -cs) main" > /etc/apt/sources.list.d/nginx-stable-$(lsb_release -cs).list'
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C300EE8C && sudo aptitude update
sudo aptitude install nginx
sudo bash -c 'curl -L https://gist.github.com/raw/802568/3a62636146eb2615cf42081b2574e8602d199658/nginx.conf > /etc/nginx/nginx.conf'

02_nginx_upstart.sh

sudo rm /etc/init.d/nginx
for file in $(ls /etc/rc*/*nginx); do sudo rm $file; done
sudo bash -c 'curl -L https://gist.github.com/raw/802568/e210f8754abdf137027daeb4c41db8cc301b36ad/nginx.conf > /etc/init/nginx.conf'
sudo start nginx

03_sample_app.sh

# Install Unicorn in the global gemset, and create a wrapper (yo yo yo in the hooouuuuuse!?)
rvm use ruby-1.9.2-p136@global
gem install unicorn --no-ri --no-rdoc
rvm wrapper ruby-1.9.2-p136 r192 unicorn
# Create and switch to a new gemset
rvm gemset create rails_app && rvm gemset use rails_app
gem install rails --no-ri --no-rdoc
# Create a sample Rails application
cd /var/www
rails new test_app
echo 'rvm use ruby-1.9.2-p136@rails_app --create' > test_app/.rvmrc
cd test_app
#
# >> Accept the .rvmrc warning
#
echo "gem 'unicorn'" >> Gemfile && bundle install
curl -L https://gist.github.com/raw/802568/998ac7c702e43d600f94fc3ee63ea05179315a0d/unicorn.rb > config/unicorn.rb
sudo bash -c 'curl -L https://gist.github.com/raw/802568/ee3f5f320c34ec2e1d1b55521776d7dccd9140d4/test_app.conf > /etc/init/test_app.conf'
sudo start test_app

etc_nginx.conf

worker_processes 1;
user www-data www-data;

pid /tmp/nginx.pid;
error_log /tmp/nginx.error.log;

events {
  worker_connections 1024;
  accept_mutex off;
}

http {
  include mime.types;
  default_type application/octet-stream;
  access_log /tmp/nginx.access.log combined;

  sendfile on;
  tcp_nopush on;
  tcp_nodelay off;

  gzip on;
  gzip_http_version 1.0;
  gzip_proxied any;
  gzip_min_length 500;
  gzip_disable "MSIE [1-6]\.";
  gzip_types text/plain text/html text/xml text/css
             text/comma-separated-values
             text/javascript application/x-javascript
             application/atom+xml;

  upstream unicorn_test {
    server unix:/var/www/test_app/tmp/sockets/unicorn.sock fail_timeout=0;
  }

  server {
    listen 80;
    client_max_body_size 4G;
    server_name _;

    keepalive_timeout 5;

    root /var/www/test_app/public;

    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://unicorn_test;
        break;
      }
    }

    error_page 500 502 503 504 /500.html;
    location = /500.html {
      root /var/www/test_app/public;
    }
  }
}

init_nginx.conf

description "nginx http daemon"

start on runlevel [2]
stop on runlevel [016]

console owner

exec /usr/sbin/nginx -c /etc/nginx/nginx.conf -g "daemon off;"

respawn

test_app.conf

description "Test rails application"

start on runlevel [2]
stop on runlevel [016]

console owner

exec /usr/local/rvm/bin/r192_unicorn -c /var/www/test_app/config/unicorn.rb

respawn

unicorn.rb

APP_ROOT = File.expand_path(File.dirname(File.dirname(__FILE__)))

if ENV['MY_RUBY_HOME'] && ENV['MY_RUBY_HOME'].include?('rvm')
  begin
    rvm_path = File.dirname(File.dirname(ENV['MY_RUBY_HOME']))
    rvm_lib_path = File.join(rvm_path, 'lib')
    $LOAD_PATH.unshift rvm_lib_path
    require 'rvm'
    RVM.use_from_path! APP_ROOT
  rescue LoadError
    raise "RVM ruby lib is currently unavailable."
  end
end

ENV['BUNDLE_GEMFILE'] = File.expand_path('../Gemfile', File.dirname(__FILE__))
require 'bundler/setup'

worker_processes 4
working_directory APP_ROOT

preload_app true

timeout 30

listen APP_ROOT + "/tmp/sockets/unicorn.sock", :backlog => 64

pid APP_ROOT + "/tmp/pids/unicorn.pid"

stderr_path APP_ROOT + "/log/unicorn.stderr.log"
stdout_path APP_ROOT + "/log/unicorn.stdout.log"

before_fork do |server, worker|
  defined?(ActiveRecord::Base) && ActiveRecord::Base.connection.disconnect!

  old_pid = RAILS_ROOT + '/tmp/pids/unicorn.pid.oldbin'
  if File.exists?(old_pid) && server.pid != old_pid
    begin
      Process.kill("QUIT", File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH
      puts "Old master alerady dead"
    end
  end
end

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