Installing Ozones Server in CentOS 6.4

Ok, as time goes by… I want to learn about advanced topics from OpenNebula. I’m going to start working with Opennebula Zones (ozones) which will allow me to create a Virtual Data Center. As I have only one machine in my lab (I accept hardware donations to increase my lab potential 🙂 ) I will have only one zone to play but that’s better than nothing.

If you are interested in OpenNebula Zones and Virtual Data Centers please read:

• http://opennebula.org/documentation:rel4.0:ozones
• http://opennebula.org/documentation:rel4.0:ozonescfg (I’ve used this doc to prepare this post)

Disclaimer: the following configuration steps will help you to to run the ozones-server in a development environment, if you want to use ozones-server in a production environment please check first how to protect your Apache server conveniently (e.g disable unneeded modules)

Ok. These are the steps I’ve followed:

// Download the OpenNebula rpm packages 

#yum localinstall opennebula-common-4.0.0-1.x86_64.rpm
#yum localinstall opennebula-ruby-4.0.0-1.x86_64.rpm 
#yum localinstall opennebula-ozones-4.0.0-1.x86_64.rpm

// Install the Apache package
#yum install httpd

// Configure the service so it's started at boot
#chkconfig httpd on

// Let's add an iptables rules so http traffic is allowed
#iptables -I INPUT -m tcp -p tcp --dport 80 -m state --state=NEW,ESTABLISHED,RELATED -j ACCEPT
#service iptables save

// Edit your /etc/httpd/conf/httpd.conf and change some default parameters like your 
// ServerName, ServerSignature Off... The rewrite and the http proxy modules are enabled 
// by default

// Let's create a configuration file e.g /etc/httpd/conf.d/ozones.conf where 
// reverse proxy directives are configured. Add this lines to the file:

ProxyPass /ozones/ http://localhost:6121/
ProxyPassReverse /ozones/ http://localhost:6121/
ProxyRequests Off

// Start your Apache server
#service httpd start

// If you have SELinux enabled we must allow Apache to start network connections:
#setsebool -P httpd_can_network_connect 1

// Now let's prepare some things to start the ozones server
// Add a user:password line into a file e.g ozonesadmin:ozonepassword and set permissions for 
// oneadmin user.
#echo ozonesadmin:ozonepassword > /var/lib/one/.one/ozones_auth
#chown oneadmin:oneadmin /var/lib/one/.one/ozones_auth

// OK!!! NOW USE THE ONEADMIN ACCOUNT
#su oneadmin

// The first time you start the ozones-server you must set at leat the OZONES_AUTH env variable
// so the database is created with the right credentials. I'm using the default sqlite database
// If you want to change the port and ip address for the server or the database server edit the
// /etc/one/ozones-server.conf file

$export OZONES_AUTH=/var/lib/one/.one/ozones_auth
$export OZONES_URL="http://localhost:6121"

// Let's start and check if the ozones server is listening

$ /usr/bin/ozones-server start
$ netstat -ntap | grep 6121
  tcp 0 0 127.0.0.1:6121 0.0.0.0:* LISTEN 20203/ruby

Great. If the apache proxy module works fine and the ozones-server is running we will be able to log into the ozones gui.

I’ve configured a proxy directive so http://myservername/ozones/ is sent to http://localhost:6121 where ozones-server is listening by default, if you use http://myservername/ozones it won’t work (css, javascript… will be missing). Remember that your user and password are configured in the authentication file you’ve created (in my case is located in /var/lib/one/.one/ozones_auth).

Finally some screenshots:

 

In a few days, I’ll play with the zones configuration.

Enjoy!

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