Set up mongodb and cluster

install mongodb

• install mongodb on ubuntu 11.10

install rock_mongo

• sudo apt-get install php-pear
• install php_mongo extension: sudo pecl install mongo
• configure php_mongo extension: add extension=mongo.so to /etc/php5/apache2/php.ini
• download rock_mongo and cp -r to /var/www/vhosts/mongo.admin
• configure dnamasq alias "*admin"now Apache, map a "mongo.admin" to a vhost. 
• (For Replication web admin) cat /etc/apache2/mods-enabled/vhost_alias.conf
• set up url rewrite
  RewriteCond %{HTTP_HOST} ^mongo.dev$
  RewriteRule (.*) http://localhost:28017/_replSet
• sudo service apache2 restart