NFS share creation error with manila

Issue

• We are unable to create shares using manila:

[cloud-user@vm ~]$ manila access-list share01
+--------------------------------------+-------------+---------------+--------------+-------+------------+----------------------------+------------+
| id                                   | access_type | access_to     | access_level | state | access_key | created_at                 | updated_at |
+--------------------------------------+-------------+---------------+--------------+-------+------------+----------------------------+------------+
| 8764221e-2039-4057-9ce4-36b68cd4ccd3 | ip          | 10.10.10.10 | rw           | error | None       | 2020-04-20T18:18:43.000000 | None       |
| fa91b26e-401b-4687-bce6-fcc859d68820 | ip          | 172.18.10.10  | rw           | error | None       | 2020-04-20T15:03:13.000000 | None       |
+--------------------------------------+-------------+---------------+--------------+-------+------------+----------------------------+------------+

• The following error is seen:

[root@overcloud-controller-0 manila]# zgrep "2020-04-20 18:18:"  manila-share.log.2.gz
2020-04-20 18:18:27.898 26 INFO manila.share.manager [req-346337af-7b6e-4b88-8cb9-04bd19c878cb - - - - -] Updating share status
2020-04-20 18:18:44.573 26 INFO paramiko.transport [-] Connected (version 2.0, client OpenSSH_7.4)
2020-04-20 18:18:44.715 26 INFO paramiko.transport [-] Auth banner:      ************WARNING********WARNING*********WARNING***************
2020-04-20 18:18:44.715 26 INFO paramiko.transport [-] Authentication (publickey) successful!
2020-04-20 18:18:45.305 26 ERROR manila.share.drivers.ganesha.manager [req-fc6a0ef4-921d-4d19-a19a-f8f2d9642169 36c1656e58f8a1bbf5b66c943f42d0661836ed2633a6b90e1b5a89419750e7b0 f1c5c4a0d30e4be2bfb62559fc269231 - - -] Error while executing management command on Ganesha node <no name>: dbus call exportmgr.AddExport.: ProcessExecutionError: Unexpected error while running command.
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server [req-fc6a0ef4-921d-4d19-a19a-f8f2d9642169 36c1656e58f8a1bbf5b66c943f42d0661836ed2633a6b90e1b5a89419750e7b0 f1c5c4a0d30e4be2bfb62559fc269231 - - -] Exception during message handling: GaneshaCommandFailure: Ganesha management command failed.
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 166, in _process_incoming
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 220, in dispatch
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 190, in _do_dispatch
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/manager.py", line 187, in wrapped
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     return f(self, *args, **kwargs)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/utils.py", line 598, in wrapper
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     return func(self, *args, **kwargs)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/manager.py", line 3353, in update_access
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     share_server=share_server)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/access.py", line 283, in update_access_rules
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     share_server=share_server)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/access.py", line 322, in _update_access_rules
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     share_server)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/access.py", line 390, in _update_rules_through_share_driver
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     share_server=share_server
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/drivers/cephfs/driver.py", line 267, in update_access
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     share_server=share_server)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/drivers/ganesha/__init__.py", line 308, in update_access
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     self.ganesha.add_export(share['name'], confdict)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/manila/share/drivers/ganesha/manager.py", line 491, in add_export
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server     cmd=e.cmd)
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server GaneshaCommandFailure: Ganesha management command failed.
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server Command: dbus-send --print-reply --system --dest=org.ganesha.nfsd /org/ganesha/nfsd/ExportMgr org.ganesha.nfsd.exportmgr.AddExport string:/etc/ganesha/export.d/share-4e34cc0a-74b9-4a59-a8e1-1ac83e8267b0.conf.Rn3LgQ 'string:EXPORT(Export_Id=1003)'
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server Exit code: 1
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server Stdout: u''
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server Stderr: u'Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.ganesha.nfsd was not provided by any .service files\n'
2020-04-20 18:18:45.511 26 ERROR oslo_messaging.rpc.server