2016-11-16 09:27:28.512 DEBUG nova.compute.api [req-2245abb6-8332-4f06-a283-3b45c465f375 admin demo] [instance: a90e4b39-4758-4614-ab4a-0def33eaa14a] block_device_mapping [BlockDeviceMapping(boot_index=0,connection_info=None,created_at=<?>,delete_on_termination=False,deleted=<?>,deleted_at=<?>,destination_type='volume',device_name='/dev/vda',device_type=None,disk_bus=None,guest_format=None,id=<?>,image_id='4645acd0-6a2b-4c84-9de2-cab80b034b78',instance=<?>,instance_uuid=<?>,no_device=False,snapshot_id=None,source_type='image',tag=None,updated_at=<?>,volume_id=None,volume_size=1)] from (pid=18984) _bdm_validate_set_size_and_instance /opt/openstack/nova/nova/compute/api.py:1239