Cluster-based virtualization management software

 Ganeti is a virtual server cluster management software tool built on top
 of the Xen and KVM virtualization technologies and other Free Software. After
 setting it up it will provide you with an automated environment to
 manage highly available virtual machine instances.
 .
 It has been designed to facilitate cluster management of virtual servers
 and to provide fast and simple recovery after physical failures using
 commodity hardware.
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 It will take care of operations such as redundant disk creation and
 management, operating system installation (in cooperation with OS-specific
 install scripts), startup, shutdown, failover of instances between physical
 systems.