api.py 文件源码

def _get_requested_instance_group(context, filter_properties,
                                      check_quota):
        if (not filter_properties or
                not filter_properties.get('scheduler_hints')):
            return

        group_hint = filter_properties.get('scheduler_hints').get('group')
        if not group_hint:
            return

        # TODO(gibi): We need to remove the following validation code when
        # removing legacy v2 code.
        if not uuidutils.is_uuid_like(group_hint):
            msg = _('Server group scheduler hint must be a UUID.')
            raise exception.InvalidInput(reason=msg)

        return objects.InstanceGroup.get_by_uuid(context, group_hint)