Comment 7 for bug 1986747

This bug affects us, and the proposed workaround setting the osd_class_dir worked.

Installed our system at bionic-ussuri (UCA), upgraded to focal, then continued all the way to focal-yoga (UCA). Ceph packages from UCA are currently version 17.2.0-0ubuntu0.22.04.1~cloud0.

Applying the osd_class_dir workaround and restarting ceph-mgr.target on the ceph-mons also got rid of this problem that appeared after upgrading to focal-yoga and Ceph Quincy:

$ sudo ceph status
  cluster:
    id: cb562c8a-787a-11ec-a57e-00163e0f587a
    health: HEALTH_ERR
            Module 'devicehealth' has failed: disk I/O error