I've been having fun today trying to invite a new disk that replaced a failing one into a cluster. One of my attempts to apply an OSD spec was clearly wrong, because I now have this error: Module 'cephadm' has failed: 'osdspec_affinity' and this was the traceback in the mgr logs: Traceback (most recent call last): File "/usr/share/ceph/mgr/cephadm/utils.py", line 77, in do_work return f(*arg) File "/usr/share/ceph/mgr/cephadm/serve.py", line 224, in refresh r = self._refresh_host_devices(host) File "/usr/share/ceph/mgr/cephadm/serve.py", line 396, in _refresh_host_devices self.update_osdspec_previews(host) File "/usr/share/ceph/mgr/cephadm/serve.py", line 412, in update_osdspec_previews previews.extend(self.mgr.osd_service.get_previews(search_host)) File "/usr/share/ceph/mgr/cephadm/services/osd.py", line 258, in get_previews return self.generate_previews(osdspecs, host) File "/usr/share/ceph/mgr/cephadm/services/osd.py", line 291, in generate_previews for host, ds in self.prepare_drivegroup(osdspec): File "/usr/share/ceph/mgr/cephadm/services/osd.py", line 225, in prepare_drivegroup existing_daemons=len(dd_for_spec_and_host)) File "/lib/python3.6/site-packages/ceph/deployment/drive_selection/selector.py", line 35, in __init__ self._data = self.assign_devices('data_devices', self.spec.data_devices) File "/lib/python3.6/site-packages/ceph/deployment/drive_selection/selector.py", line 19, in wrapper return f(self, ds) File "/lib/python3.6/site-packages/ceph/deployment/drive_selection/selector.py", line 134, in assign_devices if lv['osdspec_affinity'] != self.spec.service_id: KeyError: 'osdspec_affinity' This cluster is running 16.2.13. The exported service spec is: service_type: osd service_id: osd_spec-0.3 service_name: osd.osd_spec-0.3 placement: host_pattern: cepho-* spec: data_devices: rotational: true db_devices: model: SSDPE2KE032T8L encrypted: true filter_logic: AND objectstore: bluestore Best Wishes, Adam