def _setDiskImageFormat(self):
useQcowDiskFormat = getattr(self, 'useQcowDiskFormat', False)
# if image ID was provided extract disk driver type from manifest
if self.vm_image:
if not useQcowDiskFormat and Image.isImageId(self.vm_image):
image = Image(self.configHolder)
self.disk_driver = image.getImageFormatByImageId(self.vm_image)
return
self.disk_driver = (useQcowDiskFormat and 'qcow2') or 'raw'
