sxsw_demo.rb

require 'fog'

config = {}
config[:rackspace] = {
  :provider => 'rackspace',
  :version => :v2,
  :rackspace_username => USERNAME,
  :rackspace_api_key =>  API_KEY,
  :rackspace_region => :ord,
}

@service = Fog::Compute.new config[:rackspace]

@flavor = @service.flavors.find {|flavor| flavor.name =~ /1 GB Performance/ }

@image = @service.images.find {|image| image.name =~ /Ubuntu 12.04 LTS/}

def create_server(name)
  print "Creating '#{name}'......."
  server = @service.servers.bootstrap :name => name,
                                      :flavor_id => @flavor.id,
                                      :image_id => @image.id,
                                      :public_key_path => '~/.ssh/fog_rsa.pub',
                                      :private_key_path => '~/.ssh/fog_rsa'
 puts "[DONE]"
 server
end

def setup_webhead(web_server, db_server)
  puts "BUILDING Web Head"
  web_server.ssh "apt-get update"
  web_server.ssh "apt-get upgrade -y"
  web_server.ssh "apt-get -y install build-essential ruby1.9.1 ruby1.9.1-dev libopenssl-ruby1.9.1 git libpq-dev"
  web_server.ssh "apt-get -y install libmysqlclient18 libmysqlclient-dev   libmagickwand-dev libmagickcore-dev libmagickcore4-extra libgraphviz-dev libgvc5"
  web_server.ssh "gem install bundler"
  web_server.ssh "git clone https://github.com/krames/sxsw-demo-app"
  web_server.ssh "cd sxsw-demo-app; bundle install"
  web_server.ssh "echo '#{database_yml(db_server)}' > sxsw-demo-app/config/database.yml"
  web_server.ssh "cd sxsw-demo-app; RAILS_ENV=production bundle exec rake db:migrate"
  web_server.ssh "cd sxsw-demo-app; bundle exec rails s -d -e production; sleep 1"
  
end

def setup_db_server(server)
  puts "BUILDING DB Server"
  server.ssh "apt-get update"
  server.ssh "apt-get upgrade -y"
  
  server.ssh "debconf-set-selections <<< 'mysql-server mysql-server/root_password password junk123'"
  server.ssh "debconf-set-selections <<< 'mysql-server mysql-server/root_password_again password junk123'"
  server.ssh "apt-get -y install mysql-server"
  
  # change the bind address /etc/mysql/my.cnf
  server.ssh %Q[sed -ie 's/bind-address.*/bind-address = #{server.private_ip_address}/' /etc/mysql/my.cnf]
  # restart server
  server.ssh "service mysql restart"
  # create user
  server.ssh %q[mysql -pjunk123 -e "CREATE USER 'sxsw'@'10.%' IDENTIFIED BY 'austin123'"]
  # create database
  server.ssh "mysql -pjunk123 -e 'CREATE DATABASE sxsw_demo'"
  # grant rights
  server.ssh %q[mysql -pjunk123 -e "grant all privileges on sxsw_demo.* to 'sxsw'@'10.%' identified by 'austin123'"]
end

def setup_haproxy(server, web_server)
  puts "BUILDING HAProxy Server"
  server.ssh "apt-get update"
  server.ssh "apt-get upgrade -y"

  server.ssh "apt-get -y install haproxy"
  server.ssh %q[sed -ie 's/ENABLED=0/ENABLED=1/' /etc/default/haproxy]
  server.ssh "echo '#{haproxy_config(web_server)}' > /etc/haproxy/haproxy.cfg"
  server.ssh "service haproxy restart"
end

def database_yml(db_server)
  %Q[
    production:
      adapter: mysql2
      encoding: utf8
      database: sxsw_demo
      pool: 5
      username: sxsw
      password: austin123
      host: #{db_server.private_ip_address}
      port: 3306
    ]
end

def haproxy_config(server)
  %Q[
    global
            log 127.0.0.1   local0
            log 127.0.0.1   local1 notice
            #log loghost    local0 info
            maxconn 4096
            #chroot /usr/share/haproxy
            user haproxy
            group haproxy
            daemon
            #debug
            #quiet
            stats socket /tmp/haproxy

    defaults
            log global
            mode http
            option httplog
            option dontlognull
            retries 3
            option redispatch
            maxconn 2000
            contimeout 5000
            clitimeout 50000
            srvtimeout 50000

    listen  web-proxy 0.0.0.0:80
            mode http
            balance roundrobin
            server sxsw-web #{server.private_ip_address}:3000
    ]
end


db_server = create_server('sxsw-db')
setup_db_server(db_server)

web_server = create_server('sxsw-web')
setup_webhead(web_server, db_server)

haproxy_server = create_server('sxsw-haproxy')
setup_haproxy(haproxy_server, web_server)