Good morning, I noticed something strange on a 18.2.7 cluster, running on Ubuntu 22.04, deployed by cephadm. There are 10 hosts in total, 5 of them are all-flash and those aren't affected. The other 5 hosts are hdd-only, and only 4 of those are affected: The /var/log/ceph/{FSID}/ceph-volume.log is flooded with attempts to apply the osd spec: [2025-07-17 05:40:01,994][ceph_volume.main][INFO ] Running command: ceph-volume lvm batch --no-auto /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm /dev/sdn /dev/sdo /dev/sdp /dev/sdq /dev/sdr /dev/sds /dev/sdt /dev/sdu /dev/sdv /dev/sdw --yes --no-systemd [2025-07-17 05:42:00,216][ceph_volume.main][INFO ] Running command: ceph-volume lvm batch --no-auto /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm /dev/sdn /dev/sdo /dev/sdp /dev/sdq /dev/sdr /dev/sds /dev/sdt /dev/sdu /dev/sdv /dev/sdw --yes --no-systemd [2025-07-17 05:43:50,521][ceph_volume.main][INFO ] Running command: ceph-volume lvm batch --no-auto /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm /dev/sdn /dev/sdo /dev/sdp /dev/sdq /dev/sdr /dev/sds /dev/sdt /dev/sdu /dev/sdv /dev/sdw --yes --no-systemd So that log file alone grows to more than 1 GB per day, as a consequence other logs like syslog grow as well. But for some reason, storage08 is skipped, the mgr reports: [cephadm DEBUG root] skipping apply of storage08 on DriveGroupSpec.from_json(yaml.safe_load('''service_type: osd This is the current hdd-only spec: # ceph orch ls osd --export service_type: osd service_id: hdd-only service_name: osd.hdd-only placement: hosts: - storage06 - storage07 - storage08 - storage09 - storage10 spec: data_devices: rotational: 1 size: '1T:' filter_logic: AND objectstore: bluestore I verified that all disks are deployed as OSDs, so there's no orphan lying around or anything. I failed the mgr (of course), rebooted one host because storage08 was recently rebooted as well. I don't know for how long this has been going on, unfortunately. So I started to look at the code [0], [1], it seems like the mgr cache is not properly updated: if not self.mgr.cache.osdspec_needs_apply(host, drive_group): self.mgr.log.debug("skipping apply of %s on %s (no change)" % ( host, drive_group)) So I looked at all these values: def osdspec_needs_apply(self, host: str, spec: ServiceSpec) -> bool: if ( host not in self.devices or host not in self.last_device_change or host not in self.last_device_update or host not in self.osdspec_last_applied or spec.service_name() not in self.osdspec_last_applied[host] ): but all keys are populated with similar values as on storage08, for example: root@storage01:~# ceph config-key get mgr/cephadm/host.storage10 | jq -r '.last_device_change,.last_device_update,.osdspec_last_applied' 2025-02-12T16:27:21.979015Z 2025-07-17T05:35:18.852618Z { "osd.hdd-only": "2025-07-17T06:03:38.860971Z" } root@storage01:~# ceph config-key get mgr/cephadm/host.storage08 | jq -r '.last_device_change,.last_device_update,.osdspec_last_applied' 2025-03-11T08:23:02.851969Z 2025-07-17T05:43:47.521682Z { "osd.hdd-only": "2025-03-11T08:23:21.494004Z" } Can anyone make sense of it? I'd appreciate any pointers! Thanks! Eugen [0] https://github.com/ceph/ceph/blob/v18.2.7/src/pybind/mgr/cephadm/services/os... [1] https://github.com/ceph/ceph/blob/v18.2.7/src/pybind/mgr/cephadm/inventory.p...