Juju is a Package Manager, service orchestration management tool developed by Canonical for development of Cloud Computing of your own. Juju was formerly known as Ensemble.
With Juju, the service orchestration tool from the Ubuntu project, deployment instructions for cloud services can be stored in charms that can be used, stored and shared.
A thing of beauty - logical architecture of OpenStack
OpenStack cloud computing : architecture guide / John Rhoton with contributions from Jan de Clercq, Franz Novak
Ken Pepple - OpenStack Folsom Architecture
OpenStack has adopted a three-node design whereby a controller, compute, and network node make up its architecture #OpenStack
OpenStack helps #IaaS providers improve virtual networks; Core advantages of this platform for cloud.
OpenStack Cloud Software timeline, since its launch date in July 2010.