This page describes how to integrate an OpenStack with VCL.
Currently OpenStack Icehouse is the latest release (October, 2014) but OpenStack Kilo will be released in April 2015. Follow the installation process of OpenStack Icehouse for your Linux distribution (http://docs.openstack.org/icehouse/).
Note: The OpenStack module has developed and tested with Legacy networking (nova-network). If you plan to use OpenStack Networking (neutron), you would need to properly modify the module to support.
Follow the VCL 2.4 installation process.