C12G has created an introductory article to describe how to integrate public clouds with OpenNebula for Cloudbursting. The white paper describes the integration of public clouds with private cloud instances running OpenNebula. A general provisioning scenario that combines local and external cloud resources is first described. Afterwards the architecture of OpenNebula and the main components involved in a hybrid cloud setting are briefly presented. The document ends with some considerations and the minimum requirements to deploy a service in an hybrid cloud.