OpenVZ APIProject Source
I love OpenVZ, I think its one of the easiest to use virtualisation technologies on the market and it adds almost no overhead compared to other technologies.
I’ve been using it for a couple of years now and I always wanted to have a nicer way to automate container creation, configuration or actions than writing shell scripts. There are already a couple of webinterfaces around, but none of them I liked.
Another possibility would be to use libvirt - but libvirt always felt a bit too complex, since its a general API implementation for several hypervisors.
So I started to implement my own API, which should rather be a simple and minimalistic approach. The project is hosted on GitHub but you can as well install it by Rubygems.
gem install openvz
Restart a container
A small example to restart the container.
require 'rubygems' require 'openvz' container = OpenVZ::Container.new('109') container.restart
Here is an example about how a whole provisioning for a new container could look like.
The script creates the container configuration and runs deboostrap, sets the nameserver, ip address and hostname. Afterwards it will run a couple of commands to update it and install Puppet.
require 'rubygems' require 'openvz' container = OpenVZ::Container.new('110') container.create(:ostemplate => 'debain-6.0-boostrap', :config => 'vps.basic') container.deboostrap(:dist => 'squeeze', :mirror => 'http://cdn.debian.net/debian') container.set(:nameserver => '188.8.131.52', :ipadd => '10.0.0.2', :hostname => 'foo.ono.at') container.start # Update the system container.command('aptitude update ; aptitude -y upgrade ; apt-key update') # Install puppet container.command('aptitude -o Aptitude::Cmdline::ignore-trust-violations=true -y install puppet') # Run puppet container.command('puppetd -t --server=puppet.ono.at')read more