Hi *, I was just testing rbd-mirror on ceph version 15.2.4-864-g0f510cb110 (0f510cb1101879a5941dfa1fa824bf97db6c3d08) octopus (stable) and noticed mgr errors on the primary site (also in version 15.2.2): ---snip--- 2020-09-10T11:20:01.724+0200 7f1c1b46a700 0 [dashboard ERROR controllers.rbd_mirror] Failed to list mirror image status rbd-pool1 Traceback (most recent call last): File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in _get_pool_datum for image in mirror_image_status File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in <listcomp> for image in mirror_image_status KeyError: 'description' 2020-09-10T11:20:01.724+0200 7f1c1b46a700 0 [dashboard ERROR viewcache] Error while calling fn=<function _get_pool_datum at 0x7f1c5ac58f28> ex='description' Traceback (most recent call last): File "/usr/share/ceph/mgr/dashboard/tools.py", line 156, in run val = self.fn(*self.args, **self.kwargs) File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in _get_pool_datum for image in mirror_image_status File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in <listcomp> for image in mirror_image_status KeyError: 'description' 2020-09-10T11:20:01.724+0200 7f1c1ec71700 0 [dashboard ERROR viewcache] Error while calling fn=<function _get_content_data at 0x7f1c5ac610d0> ex='description' Traceback (most recent call last): File "/usr/share/ceph/mgr/dashboard/tools.py", line 156, in run val = self.fn(*self.args, **self.kwargs) File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 283, in _get_content_data _, pool = _get_pool_datum(pool_name) File "/usr/share/ceph/mgr/dashboard/tools.py", line 254, in wrapper return rvc.run(fn, args, kwargs) File "/usr/share/ceph/mgr/dashboard/tools.py", line 236, in run raise self.exception File "/usr/share/ceph/mgr/dashboard/tools.py", line 156, in run val = self.fn(*self.args, **self.kwargs) File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in _get_pool_datum for image in mirror_image_status File "/usr/share/ceph/mgr/dashboard/controllers/rbd_mirroring.py", line 259, in <listcomp> for image in mirror_image_status KeyError: 'description' 2020-09-10T11:20:01.724+0200 7f1c23ebb700 0 [dashboard ERROR request] [X.X.X.X:42050] [GET] [500] [0.020s] [admin] [513.0B] /api/block/mirroring/summary 2020-09-10T11:20:01.728+0200 7f1c23ebb700 0 [dashboard ERROR request] [b'{"status": "500 Internal Server Error", "detail": "The server encountered an unexpected condition which prevented it from fulfilling the request.", "request_id": "64ea5407-171b-4f6c-862e-fc881e68fec0"} ---snip--- The mirroring itself seems to work fine, I haven't noticed issues with the image on the secondary site. I also uploaded a screenshot of the dashboard [1], the installation is on openSUSE Leap 15.2. I couldn't find a tracker issue or a report in bugzilla.opensuse.org, but before creating a ticket I wanted to ask if this is a known issue. The rbd-mirror panel works fine on the secondary site, I assume because there is actually an rbd-mirror daemon running. Or maybe I just misunderstand the purpose, but if there is no mirror daemon on site A there shouldn't be an error message, should it? Regards, Eugen [1] https://paste.opensuse.org/36442780