NovaComputeLibvirtType: {get_param: NovaComputeLibvirtType}
NovaComputeLibvirtVifDriver: {get_param: NovaComputeLibvirtVifDriver}
NovaEnableRbdBackend: {get_param: NovaEnableRbdBackend}
+ NovaIPv6: {get_param: NovaIPv6}
NovaPublicIP: {get_attr: [VipMap, net_ip_map, external]}
NovaPassword: {get_param: NovaPassword}
NovaOVSBridge: {get_param: NovaOVSBridge}