http://serverascode.com/2012/11/26/converting-vmware-windows-to-openstack.html
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization_for_Desktops/2.2/html/Administration_Guide/virt-v2v-scripts.html
http://www.ibm.com/developerworks/cn/linux/l-cn-mgrtvm3/index.html
https://pve.proxmox.com/wiki/Migration_of_servers_to_Proxmox_VE