* Jay See via ceph-users <ceph-users@ceph.io> on Wed, 11 Mar 2026 at 09:41:

Hi all,

After upgrading a Ceph Reef (18.2.4) node from Ubuntu 20.04 (kernel 5.4.0) to Ubuntu 22.04 (kernel 5.15.0-94), a cephadm-managed OSD fails to start with a “Permission denied” error.

Hi Jay, We had a similar issue when moving from 20.04 to 24.04 in a containerized setup. The issue for us turned out to be that Focal inherited the uids+gids from the OS into the containers, whereas Noble did not. Worth checking if it is the same on Jammy as well. The logs will state that the osd mounts are chowned to ceph:ceph, sometimes stating the actual numerical uid+gid (167:167). However, this turned out to be misleading, and one had to manually set the uid+gids on the storage nodes as these were set to a higher range than what was expected by the containers, thus causing the “permission denied” error- $ usermod -u 167 ceph ; groupmod -g 167 ceph ; reboot --Martin