These fields were introduced since 3.1 microversion in OpenStack Newton: https://docs.openstack.org/cinder/latest/contributor/api_microversion_history.html#id1 https://github.com/openstack/cinder/blob/e921b3ae6c462f5f844485f7da7164e194efd00c/cinder/api/contrib/volume_actions.py#L232..L240