def _backup(task, backup_type):
task_uuid = task.uuid
params = db.task_parameter_get_all_by_task_uuid(task_uuid)
rotation = params.get('rotation', '0')
try:
rotation = int(rotation)
except ValueError:
logger.error("Invalid rotation '%(rotation)s' for task"
" '%(task_uuid)s'" % locals())
rotation = 0
backup_name = backup_type
common_utils.execute(
'nova', 'backup', task.instance_uuid, backup_name, backup_type,
str(rotation))
