If hybrid cloud environments were a reality, enterprises would design their internal data centers for average load, and simply rent additional capacity in the cloud to accommodate peaks. They would be able to take their multi-VM applications as is (without making any changes) and run them on any cloud. They would use their existing VMs, networking and storage topology, the same processes, tools, etc. However, that is not possible today.
What’s needed is an infrastructure that normalizes the public cloud and the data center from the application’s perspective. This infrastructure would run in the cloud and expose the same computing, network and storage services to the multi-VM enterprise application as if it were running internally.
To accomplish this, ravello has developed a “Cloud Application Hypervisor”. This enables an enterprise to completely encapsulate a multi-VM application (e.g., VMware or KVM) and run it in any cloud (e.g., Amazon AWS/EC-2, Rackspace, HP Cloud) without making any changes whatsoever.