Describe the issue: After upgrading from RHCS 4 to RHCS 5, "require_min_compat_client" will be set as jewel instead of luminous. In the upgrade document, its not mentioned to change it to luminous. Suggestions for improvement: Include the section to change require_min_compat_client to luminous after cephadm adoption. Document URL: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/5/html-single/upgrade_guide/index#converting-the-storage-cluster-to-using-cephadm_assembly_upgrading-a-red-hat-ceph-storage-cluster-running-rhel-8-from-rhcs-4-to-rhcs-5 Chapter/Section Number and Title: 2.7. Converting the storage cluster to using cephadm Product Version: RHCS 5. Any other versions of this document that also needs this update: NA
Additional information: After upgrading from RHCS 4 to RHCS 5, "ceph balancer mode will keep "upmap" (default mode) But it won't work efficiently since "require_min_compat_client" is set as jewel instead of luminous. [ceph: root@03-87-04-node1 /]# ceph osd dump | head -n 13 epoch 96 fsid 2c4dde66-4207-463b-bcea-b994c7f4e7ba created 2023-01-20T08:03:11.291326+0000 modified 2023-02-27T07:55:45.721167+0000 flags sortbitwise,recovery_deletes,purged_snapdirs,pglog_hardlimit crush_version 10 full_ratio 0.95 backfillfull_ratio 0.9 nearfull_ratio 0.85 require_min_compat_client jewel <<------ min_compat_client jewel require_osd_release pacific stretch_mode_enabled false [ceph: root@03-87-04-node1 /]# [ceph: root@03-87-04-node1 /]# ceph version ceph version 16.2.10-94.el8cp (48ce8ed67474ea50f10c019b9445be7f49749d23) pacific (stable) [ceph: root@03-87-04-node1 /]# Impact: - To work upmap efficiently, require_min_compat_client should be in luminous. - Otherwise ceph dashboard will report CephPGImbalance alert. - Reference: https://access.redhat.com/solutions/6999772