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Hello

we are facing some difficulties when we try to backup a volume stored in a
RBD backend to a swift container (we have the same issue with ceph rbd
backup backend).

We have googled but it seems that nobody ahs this issue. I hope I could be
more lucky here ;)

here is the log :

TE_USER,NO_ENGINE_SUBSTITUTION _check_effective_sql_mode
/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/session.py:514
2015-05-05 11:34:58.329 14048: DEBUG cinder.volume.drivers.rbd
[req-27352642-0b71-49d5-b38b-e7d3cfa7d8ec 4bd09b121e2043e48d7f89cd6ee6eb47
8725df8f38e54f409d2fd1a6de2fac8c - - -] opening connection to ceph cluster
(timeout=-1). _connect_to_rados
/usr/lib/python2.7/dist-packages/cinder/volume/drivers/rbd.py:300
*2015-05-05 11:34:58.475 14048: ERROR oslo_messaging.rpc.dispatcher
[req-27352642-0b71-49d5-b38b-e7d3cfa7d8ec 4bd09b121e2043e48d7f89cd6ee6eb47
8725df8f38e54f409d2fd1a6de2fac8c - - -] Exception during message handling:
<type 'NoneType'> can't be encoded*
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
Traceback (most recent call last):
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py",
line 142, in _dispatch_and_reply
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
executor_callback))
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py",
line 186, in _dispatch
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
executor_callback)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py",
line 130, in _do_dispatch
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
result = func(ctxt, **new_args)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/osprofiler/profiler.py", line 105, in
wrapper
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
return f(*args, **kwargs)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/cinder/backup/manager.py", line 301, in
create_backup
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
'fail_reason': six.text_type(err)})
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 85,
in __exit__
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
six.reraise(self.type_, self.value, self.tb)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/cinder/backup/manager.py", line 294, in
create_backup
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
backup_service)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/osprofiler/profiler.py", line 105, in
wrapper
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
return f(*args, **kwargs)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/cinder/volume/drivers/rbd.py", line 897,
in backup_volume
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
self.configuration.rbd_ceph_conf)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/lib/python2.7/dist-packages/cinder/volume/drivers/rbd.py", line 94,
in __init__
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
self.user = encodeutils.safe_encode(user)
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher   File
"/usr/local/lib/python2.7/dist-packages/oslo_utils/encodeutils.py", line
76, in safe_encode
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
raise TypeError("%s can't be encoded" % type(text))
2015-05-05 11:34:58.475 14048: TRACE oslo_messaging.rpc.dispatcher
TypeError: *<type 'NoneType'> can't be encoded*
2015-05-05 11:34:58.475 14048 TRACE oslo_messaging.rpc.dispatcher

Has anyone faced this problem ?

Thanks !

-- 
---
Maxime Aubry
Service Hébergement
Hexanet

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