This couldn't be reproduced in upstream Nautilus (v14) with vstart Cephfs (2xMDS), so perhaps this could be a downstream-only issue. Traceback found in ceph-mgr log: "Traceback (most recent call last): File "/lib/python3.6/site-packages/cherrypy/_cprequest.py", line 670, in respond response.body = self.handler() File "/lib/python3.6/site-packages/cherrypy/lib/encoding.py", line 220, in __call__ self.body = self.oldhandler(*args, **kwargs) File "/lib/python3.6/site-packages/cherrypy/_cptools.py", line 237, in wrap return self.newhandler(innerfunc, *args, **kwargs) File "/usr/share/ceph/mgr/dashboard/services/exception.py", line 88, in dashboard_exception_handler return handler(*args, **kwargs) File "/lib/python3.6/site-packages/cherrypy/_cpdispatch.py", line 60, in __call__ return self.callable(*self.args, **self.kwargs) File "/usr/share/ceph/mgr/dashboard/controllers/__init__.py", line 649, in inner ret = func(*args, **kwargs) File "/usr/share/ceph/mgr/dashboard/controllers/__init__.py", line 842, in wrapper return func(*vpath, **params) File "/usr/share/ceph/mgr/dashboard/controllers/cephfs.py", line 32, in get return self.fs_status(fs_id) File "/usr/share/ceph/mgr/dashboard/controllers/cephfs.py", line 159, in fs_status mds_versions[metadata.get('ceph_version', 'unknown')].append( AttributeError: 'NoneType' object has no attribute 'get' Additionally, downstream Mgr API mgr.list_servers() shows 'mds.0' detached from any host (while upstream one properly displays 'mds.a' attached to its host).
*** Bug 1772788 has been marked as a duplicate of this bug. ***
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:0312