# install ruby
sudo apt-get install ruby ri rdoc libmysql-ruby
# download rubygems
sudo wget http://rubyforge.org/frs/download.php/20989/rubygems-0.9.4.tgz
# tar rubygems
tar -xvzf rubygems-0.9.4.tgz
# ruby setup.rb rubygems script
cd rubygems-0.9.4
sudo ruby setup.rb
# download and install Ruby on Rails framework
sudo gem install rails --include-dependencies

# install Apache 2.2
sudo apt-get install apache2
 
# first way to enable modules in apache
cd /etc/apache2/mods-enabled/ 
sudo ln -s ../mods-available/rewrite.load rewrite.load
sudo ln -s ../mods-available/proxy.load proxy.load
sudo ln -s ../mods-available/proxy_balancer.load proxy_balancer.load
sudo ln -s ../mods-available/proxy_http.load proxy_http.load
 
# second way to enable modules in apache
sudo a2enmod rewrite
sudo a2enmod proxy
sudo a2enmod proxy_balancer
sudo a2enmod proxy_http

# Install Mongrel
sudo gem install daemons gem_plugin mongrel mongrel_cluster --include-dependencies
# create the mongrel user
sudo /usr/sbin/adduser -r mongrel
# create the mongrel cluster
sudo mongrel_rails cluster::configure -e production -p 3010 -N 2 -c /home/corti/Documents/ror/myapp -a 127.0.0.1 --user mongrel --group mongrel

user: mongrel
cwd: /home/corti/Documents/ror/myapp
log_file: log/mongrel.log
port: "3010"
environment: production
group: mongrel
address: 127.0.0.1
pid_file: tmp/pids/mongrel.pid
servers: 2

# make log and temp directories writable from mongrel user
sudo chown -R mongrel:mongrel  /home/corti/Documents/ror/myapp/tmp
sudo chown -R mongrel:mongrel  /home/corti/Documents/ror/myapp/log
# start mongrel clusters
sudo mongrel_rails cluster::start

# create a mongrel_cluster directory in /etc directory
sudo mkdir /etc/mongrel_cluster
# create a link to the mongrel_cluster.yml in the /etc/mongrel_cluster folder 
# (name the link as your application, so many ruby application's mongrel cluster file 
# will be linked there and they will be booted at startup
sudo ln -s /var/www/apps/testapp/config/mongrel_cluster.yml /etc/mongrel_cluster/myapp.yml
# copy (or link) the mongrel_cluster init script (you will find it in your mongrel installation path) 
# to the /etc/init.d folder 
sudo cp /path/to/mongrel_cluster_gem/resources/mongrel_cluster  /etc/init.d/
# make the script executable
sudo chmod +x /etc/init.d/mongrel_cluster 
# install as a service
cd /etc/init.d/
sudo /usr/sbin/update-rc.d -f mongrel_cluster defaults

127.0.0.1 localhost
127.0.0.1 myapp

NameVirtualHost *:80
 
#we need this as on Ubuntu by default Proxy is not allowed
<Proxy *>
  Order allow,deny
  Allow from all
</Proxy>
 
#Proxy balancer section (create one for each ruby app cluster)
<Proxy balancer://myapp_cluster>
  BalancerMember http://myapp:3010
  BalancerMember http://myapp:3011
</Proxy>
 
#Virtual host section (create one for each ruby app you need to publish)
<VirtualHost *:80>
  ServerName myapp
  DocumentRoot /home/corti/Documents/ror/myapp/public/
 
  <Directory /home/corti/Documents/ror/myapp/public/ >
      Options Indexes FollowSymLinks MultiViews
      AllowOverride All
      Order allow,deny
      allow from all
  </Directory>
 
  #log files
  ErrorLog /var/log/apache2/myapp_error.log
  # Possible values include: debug, info, notice, warn, error, crit,
  # alert, emerg.
  LogLevel warn
  CustomLog /var/log/apache2/myapp_access.log combined
 
  #Rewrite stuff
   RewriteEngine On
 
  # Check for maintenance file and redirect all requests
  RewriteCond %{DOCUMENT_ROOT}/system/maintenance.html -f
  RewriteCond %{SCRIPT_FILENAME} !maintenance.html
  RewriteRule ^.*$ /system/maintenance.html [L]
 
  # Rewrite index to check for static
  RewriteRule ^/$ /index.html [QSA] 
 
  # Rewrite to check for Rails cached page
  RewriteRule ^([^.]+)$ $1.html [QSA]
 
  # Redirect all non-static requests to cluster
  RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
  RewriteRule ^/(.*)$ balancer://myapp_cluster%{REQUEST_URI} [P,QSA,L]
</VirtualHost>

sudo /etc/init.d/apache2 restart