Originally posted on Alessio Ababilov's Blog:
We use Openstack at Grid Dynamics for more than a year. It is the basis of our private infrastructure originally named Cloud For Grid Dynamics (C4GD) and now known as Altai. C4GD provided cheap and fast VM management for our developers’ needs with reliable support. We were using the Diablo release and were happy with it.
On 5 April 2012 a new shiny Essex was released not without Grid Dynamics initiative (you can even find me in the list of contributors). I was challenged to investigate and prepare migration scripts for our cloud.
I started from my old scripts for installing Diablo and began writing a set of tools that make easy both migration and installation from scratch for different releases. You can see the result of my work at Github. These scripts work with OpenStack packaged to RPMs at Grid Dynamics.