Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

What else is required by the compute nodes in order to get a LUN created by EMC SMI-S driver to be mapped to an instance on a compute node?

I've got an environment setup with Cinder to use the EMC SMI-S drives for FC attahced volumes. The openstack configuration guide only mentions that for VNX FC configuration, you only need to regiser the HBAs of the compute nodes with the VNX array. I've done that, but the volumes that are created failing to attach to instances on the compute node. I see that in the volume.log, messages regarding problems with the wwpns, so it appears that some linkage on the compute nodes is missing.

2014-08-01 14:36:22.766 5872 ERROR oslo.messaging._drivers.common [req-364f7f97-8c91-4d15-bac9-85e80223d525 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller 2014-08-01 14:36:22.767 5872 ERROR oslo.messaging._drivers.common [req-364f7f97-8c91-4d15-bac9-85e80223d525 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, *new_args)\n', ' File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"] 2014-08-01 14:36:24.846 5872 WARNING cinder.context [-] Arguments dropped when creating context: {'user': u'73a4bb0be71940c7851884de48885797', 'tenant': u'ff67857bb8134aab85103f4c6f63a2c8', 'user_identity': u'73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -'} 2014-08-01 14:36:24.876 5872 DEBUG cinder.volume.manager [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume 3d552381-eda2-4886-84d7-640ecc24c134: creating export initialize_connection /usr/lib/python2.6/site-packages/cinder/volume/manager.py:781 2014-08-01 14:36:24.876 5872 INFO cinder.volume.drivers.emc.emc_smis_common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Initialize connection: volume-3d552381-eda2-4886-84d7-640ecc24c134 2014-08-01 14:36:24.906 5872 DEBUG cinder.volume.drivers.emc.emc_smis_common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume name: volume-3d552381-eda2-4886-84d7-640ecc24c134 Volume instance: root/emc:Clar_StorageVolume.CreationClassName="Clar_StorageVolume",SystemName="CLARiiON+CKM00114100637",DeviceID="00006",SystemCreationClassName="Clar_StorageSystem". _find_lun /usr/lib/python2.6/site-packages/cinder/volume/drivers/emc/emc_smis_common.py:1298 2014-08-01 14:36:24.906 5872 ERROR cinder.volume.manager [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:24.907 5872 ERROR oslo.messaging.rpc.dispatcher [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Exception during message handling: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last): 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher incoming.message)) 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args) 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, *new_args) 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher raise exception.VolumeBackendAPIException(data=err_msg) 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher 2014-08-01 14:36:24.908 5872 ERROR oslo.messaging._drivers.common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller 2014-08-01 14:36:24.909 5872 ERROR oslo.messaging._drivers.common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, *new_args)\n', ' File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"] 2014-08-01 14:36:28.988 5872 WARNING cinder.context [-] Arguments dropped when creating context: {'user': u'73a4bb0be71940c7851884de48885797', 'tenant': u'ff67857bb8134aab85103f4c6f63a2c8', 'user_identity': u'73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -'} 2014-08-01 14:36:29.021 5872 DEBUG cinder.volume.manager [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume 3d552381-eda2-4886-84d7-640ecc24c134: creating export initialize_connection /usr/lib/python2.6/site-packages/cinder/volume/manager.py:781 2014-08-01 14:36:29.022 5872 INFO cinder.volume.drivers.emc.emc_smis_common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Initialize connection: volume-3d552381-eda2-4886-84d7-640ecc24c134 2014-08-01 14:36:29.047 5872 DEBUG cinder.volume.drivers.emc.emc_smis_common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume name: volume-3d552381-eda2-4886-84d7-640ecc24c134 Volume instance: root/emc:Clar_StorageVolume.CreationClassName="Clar_StorageVolume",SystemName="CLARiiON+CKM00114100637",DeviceID="00006",SystemCreationClassName="Clar_StorageSystem". _find_lun /usr/lib/python2.6/site-packages/cinder/volume/drivers/emc/emc_smis_common.py:1298 2014-08-01 14:36:29.047 5872 ERROR cinder.volume.manager [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:29.048 5872 ERROR oslo.messaging.rpc.dispatcher [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Exception during message handling: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last): 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher incoming.message)) 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args) 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, *new_args) 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher raise exception.VolumeBackendAPIException(data=err_msg) 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' 2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher 2014-08-01 14:36:29.049 5872 ERROR oslo.messaging._drivers.common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller

2014-08-01 14:36:29.049 5872 ERROR oslo.messaging._drivers.common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, **new_args)\n', ' File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"]

Has anyone here ever gotten this to work? So far, I can only get the LUNS created on the VNX....

What else is required by the compute nodes in order to get a LUN created by EMC SMI-S driver to be mapped to an instance on a compute node?

I've got an environment setup with Cinder to use the EMC SMI-S drives for FC attahced volumes. The openstack configuration guide only mentions that for VNX FC configuration, you only need to regiser the HBAs of the compute nodes with the VNX array. I've done that, but the volumes that are created failing to attach to instances on the compute node. I see that in the volume.log, messages regarding problems with the wwpns, so it appears that some linkage on the compute nodes is missing.

2014-08-01 14:36:22.766 5872 ERROR oslo.messaging._drivers.common [req-364f7f97-8c91-4d15-bac9-85e80223d525 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller
2014-08-01 14:36:22.767 5872 ERROR oslo.messaging._drivers.common [req-364f7f97-8c91-4d15-bac9-85e80223d525 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n    incoming.message))\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n    return self._do_dispatch(endpoint, method, ctxt, args)\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n    result = getattr(endpoint, method)(ctxt, *new_args)\n', **new_args)\n', '  File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n    raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"]
2014-08-01 14:36:24.846 5872 WARNING cinder.context [-] Arguments dropped when creating context: {'user': u'73a4bb0be71940c7851884de48885797', 'tenant': u'ff67857bb8134aab85103f4c6f63a2c8', 'user_identity': u'73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -'}
2014-08-01 14:36:24.876 5872 DEBUG cinder.volume.manager [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume 3d552381-eda2-4886-84d7-640ecc24c134: creating export initialize_connection /usr/lib/python2.6/site-packages/cinder/volume/manager.py:781
2014-08-01 14:36:24.876 5872 INFO cinder.volume.drivers.emc.emc_smis_common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Initialize connection: volume-3d552381-eda2-4886-84d7-640ecc24c134
2014-08-01 14:36:24.906 5872 DEBUG cinder.volume.drivers.emc.emc_smis_common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume name: volume-3d552381-eda2-4886-84d7-640ecc24c134  Volume instance: root/emc:Clar_StorageVolume.CreationClassName="Clar_StorageVolume",SystemName="CLARiiON+CKM00114100637",DeviceID="00006",SystemCreationClassName="Clar_StorageSystem". _find_lun /usr/lib/python2.6/site-packages/cinder/volume/drivers/emc/emc_smis_common.py:1298
2014-08-01 14:36:24.906 5872 ERROR cinder.volume.manager [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:24.907 5872 ERROR oslo.messaging.rpc.dispatcher [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Exception during message handling: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher     incoming.message))
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher     result = getattr(endpoint, method)(ctxt, *new_args)
**new_args)
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher     raise exception.VolumeBackendAPIException(data=err_msg)
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:24.907 5872 TRACE oslo.messaging.rpc.dispatcher
2014-08-01 14:36:24.908 5872 ERROR oslo.messaging._drivers.common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller
2014-08-01 14:36:24.909 5872 ERROR oslo.messaging._drivers.common [req-4dfcf587-a8b5-40b3-9e57-110c50500445 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n    incoming.message))\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n    return self._do_dispatch(endpoint, method, ctxt, args)\n', '  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n    result = getattr(endpoint, method)(ctxt, *new_args)\n', **new_args)\n', '  File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n    raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"]
2014-08-01 14:36:28.988 5872 WARNING cinder.context [-] Arguments dropped when creating context: {'user': u'73a4bb0be71940c7851884de48885797', 'tenant': u'ff67857bb8134aab85103f4c6f63a2c8', 'user_identity': u'73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -'}
2014-08-01 14:36:29.021 5872 DEBUG cinder.volume.manager [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume 3d552381-eda2-4886-84d7-640ecc24c134: creating export initialize_connection /usr/lib/python2.6/site-packages/cinder/volume/manager.py:781
2014-08-01 14:36:29.022 5872 INFO cinder.volume.drivers.emc.emc_smis_common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Initialize connection: volume-3d552381-eda2-4886-84d7-640ecc24c134
2014-08-01 14:36:29.047 5872 DEBUG cinder.volume.drivers.emc.emc_smis_common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Volume name: volume-3d552381-eda2-4886-84d7-640ecc24c134  Volume instance: root/emc:Clar_StorageVolume.CreationClassName="Clar_StorageVolume",SystemName="CLARiiON+CKM00114100637",DeviceID="00006",SystemCreationClassName="Clar_StorageSystem". _find_lun /usr/lib/python2.6/site-packages/cinder/volume/drivers/emc/emc_smis_common.py:1298
2014-08-01 14:36:29.047 5872 ERROR cinder.volume.manager [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:29.048 5872 ERROR oslo.messaging.rpc.dispatcher [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Exception during message handling: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher     incoming.message))
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher     result = getattr(endpoint, method)(ctxt, *new_args)
**new_args)
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher   File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher     raise exception.VolumeBackendAPIException(data=err_msg)
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'
2014-08-01 14:36:29.048 5872 TRACE oslo.messaging.rpc.dispatcher
2014-08-01 14:36:29.049 5872 ERROR oslo.messaging._drivers.common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] Returning exception Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns' to caller

caller 2014-08-01 14:36:29.049 5872 ERROR oslo.messaging._drivers.common [req-f3a7de91-f562-4201-8a88-d08e7b5a1313 73a4bb0be71940c7851884de48885797 ff67857bb8134aab85103f4c6f63a2c8 - - -] ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 133, in _dispatch_and_reply\n incoming.message))\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 176, in _dispatch\n return self._do_dispatch(endpoint, method, ctxt, args)\n', ' File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 122, in _do_dispatch\n result = getattr(endpoint, method)(ctxt, **new_args)\n', ' File "/usr/lib/python2.6/site-packages/cinder/volume/manager.py", line 802, in initialize_connection\n raise exception.VolumeBackendAPIException(data=err_msg)\n', "VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: Unable to fetch connection information from backend: 'wwpns'\n"]

'wwpns'\n"]

Has anyone here ever gotten this to work? So far, I can only get the LUNS created on the VNX....