Comment 12 for bug 1639239

To confirm, we are seeing this with s390x architectures running Newton:

2016-11-30 20:55:31.178 45484 CRITICAL nova [req-226c429a-9a55-4e85-b8e8-623bc32f3509 - - - - -] ValueError: Invalid InitiatorConnector protocol specified ISCSI
2016-11-30 20:55:31.178 45484 ERROR nova Traceback (most recent call last):
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/bin/nova-compute", line 10, in <module>
2016-11-30 20:55:31.178 45484 ERROR nova sys.exit(main())
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/cmd/compute.py", line 60, in main
2016-11-30 20:55:31.178 45484 ERROR nova db_allowed=CONF.conductor.use_local)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 218, in create
2016-11-30 20:55:31.178 45484 ERROR nova db_allowed=db_allowed)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 92, in __init__
2016-11-30 20:55:31.178 45484 ERROR nova self.manager = manager_class(host=self.host, *args, **kwargs)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 536, in __init__
2016-11-30 20:55:31.178 45484 ERROR nova self.driver = driver.load_compute_driver(self.virtapi, compute_driver)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/virt/driver.py", line 1619, in load_compute_driver
2016-11-30 20:55:31.178 45484 ERROR nova virtapi)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/oslo_utils/importutils.py", line 44, in import_object
2016-11-30 20:55:31.178 45484 ERROR nova return import_class(import_str)(*args, **kwargs)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 354, in __init__
2016-11-30 20:55:31.178 45484 ERROR nova self._get_volume_drivers(), self)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/virt/driver.py", line 44, in driver_dict_from_config
2016-11-30 20:55:31.178 45484 ERROR nova driver_registry[driver_type] = driver_class(*args, **kwargs)
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/volume/iscsi.py", line 41, in __init__
2016-11-30 20:55:31.178 45484 ERROR nova transport=self._get_transport())
2016-11-30 20:55:31.178 45484 ERROR nova File "/usr/lib/python2.7/dist-packages/os_brick/initiator/connector.py", line 273, in factory
2016-11-30 20:55:31.178 45484 ERROR nova raise ValueError(msg)
2016-11-30 20:55:31.178 45484 ERROR nova ValueError: Invalid InitiatorConnector protocol specified ISCSI