This document discusses deploying OpenStack in a multi-hypervisor enterprise environment. It notes that enterprises currently have large investments in virtualization infrastructure like VMware, and outlines some of the challenges of introducing an open-source cloud platform. It then describes how OpenStack's drivers allow it to support multiple hypervisors like VMware and Hyper-V, providing a single control plane to manage workloads on different infrastructure. Limitations of the hypervisor drivers are also discussed.