VMware vSphere and OpenStack
In this video we describe how OpenStack Compute (Nova) interacts the VMware vSphere product family and enables access to advanced features such as vMotion, High Availability, and Dynamic Resource Scheduling (DRS). Because individual ESX hosts are not exposed to the Nova scheduler, Nova schedules to the granularity of clusters. When a virtual machine makes its way into a vCenter cluster, it can use all vSphere features. This brings tremendous operational efficiency to an OpenStack-based Cloud without compromising the technical investment already committed to managing and troubleshooting a VMware environment.
via VMware NSX