Tests for Focal:

$ for osd in {0..2}; do juju ssh ceph-osd/$osd 'sudo dpkg -l | grep ceph'; done
ii  ceph                                 15.2.3-0ubuntu0.20.04.2               amd64        distributed storage and file system
ii  ceph-base                            15.2.3-0ubuntu0.20.04.2               amd64        common ceph daemon libraries and management tools
ii  ceph-common                          15.2.3-0ubuntu0.20.04.2               amd64        common utilities to mount and interact with a ceph storage cluster
ii  ceph-mds                             15.2.3-0ubuntu0.20.04.2               amd64        metadata server for the ceph distributed file system
ii  ceph-mgr                             15.2.3-0ubuntu0.20.04.2               amd64        manager for the ceph distributed file system
ii  ceph-mgr-modules-core                15.2.3-0ubuntu0.20.04.2               all          ceph manager modules which are always enabled
ii  ceph-mon                             15.2.3-0ubuntu0.20.04.2               amd64        monitor server for the ceph storage system
ii  ceph-osd                             15.2.3-0ubuntu0.20.04.2               amd64        OSD server for the ceph storage system
ii  libcephfs2                           15.2.3-0ubuntu0.20.04.2               amd64        Ceph distributed file system client library
ii  python3-ceph-argparse                15.2.3-0ubuntu0.20.04.2               amd64        Python 3 utility libraries for Ceph CLI
ii  python3-ceph-common                  15.2.3-0ubuntu0.20.04.2               all          Python 3 utility libraries for Ceph
ii  python3-cephfs                       15.2.3-0ubuntu0.20.04.2               amd64        Python 3 libraries for the Ceph libcephfs library
Connection to 10.5.2.78 closed.
ii  ceph                                 15.2.3-0ubuntu0.20.04.2               amd64        distributed storage and file system
ii  ceph-base                            15.2.3-0ubuntu0.20.04.2               amd64        common ceph daemon libraries and management tools
ii  ceph-common                          15.2.3-0ubuntu0.20.04.2               amd64        common utilities to mount and interact with a ceph storage cluster
ii  ceph-mds                             15.2.3-0ubuntu0.20.04.2               amd64        metadata server for the ceph distributed file system
ii  ceph-mgr                             15.2.3-0ubuntu0.20.04.2               amd64        manager for the ceph distributed file system
ii  ceph-mgr-modules-core                15.2.3-0ubuntu0.20.04.2               all          ceph manager modules which are always enabled
ii  ceph-mon                             15.2.3-0ubuntu0.20.04.2               amd64        monitor server for the ceph storage system
ii  ceph-osd                             15.2.3-0ubuntu0.20.04.2               amd64        OSD server for the ceph storage system
ii  libcephfs2                           15.2.3-0ubuntu0.20.04.2               amd64        Ceph distributed file system client library
ii  python3-ceph-argparse                15.2.3-0ubuntu0.20.04.2               amd64        Python 3 utility libraries for Ceph CLI
ii  python3-ceph-common                  15.2.3-0ubuntu0.20.04.2               all          Python 3 utility libraries for Ceph
ii  python3-cephfs                       15.2.3-0ubuntu0.20.04.2               amd64        Python 3 libraries for the Ceph libcephfs library
Connection to 10.5.0.35 closed.
ii  ceph                                 15.2.3-0ubuntu0.20.04.2               amd64        distributed storage and file system
ii  ceph-base                            15.2.3-0ubuntu0.20.04.2               amd64        common ceph daemon libraries and management tools
ii  ceph-common                          15.2.3-0ubuntu0.20.04.2               amd64        common utilities to mount and interact with a ceph storage cluster
ii  ceph-mds                             15.2.3-0ubuntu0.20.04.2               amd64        metadata server for the ceph distributed file system
ii  ceph-mgr                             15.2.3-0ubuntu0.20.04.2               amd64        manager for the ceph distributed file system
ii  ceph-mgr-modules-core                15.2.3-0ubuntu0.20.04.2               all          ceph manager modules which are always enabled
ii  ceph-mon                             15.2.3-0ubuntu0.20.04.2               amd64        monitor server for the ceph storage system
ii  ceph-osd                             15.2.3-0ubuntu0.20.04.2               amd64        OSD server for the ceph storage system
ii  libcephfs2                           15.2.3-0ubuntu0.20.04.2               amd64        Ceph distributed file system client library
ii  python3-ceph-argparse                15.2.3-0ubuntu0.20.04.2               amd64        Python 3 utility libraries for Ceph CLI
ii  python3-ceph-common                  15.2.3-0ubuntu0.20.04.2               all          Python 3 utility libraries for Ceph
ii  python3-cephfs                       15.2.3-0ubuntu0.20.04.2               amd64        Python 3 libraries for the Ceph libcephfs library
Connection to 10.5.2.144 closed.

$ juju ssh ceph-mon/0 'sudo dpkg -l | grep ceph'
ii  ceph                                 15.2.3-0ubuntu0.20.04.2               amd64        distributed storage and file system
ii  ceph-base                            15.2.3-0ubuntu0.20.04.2               amd64        common ceph daemon libraries and management tools
ii  ceph-common                          15.2.3-0ubuntu0.20.04.2               amd64        common utilities to mount and interact with a ceph storage cluster
ii  ceph-mds                             15.2.3-0ubuntu0.20.04.2               amd64        metadata server for the ceph distributed file system
ii  ceph-mgr                             15.2.3-0ubuntu0.20.04.2               amd64        manager for the ceph distributed file system
ii  ceph-mgr-modules-core                15.2.3-0ubuntu0.20.04.2               all          ceph manager modules which are always enabled
ii  ceph-mon                             15.2.3-0ubuntu0.20.04.2               amd64        monitor server for the ceph storage system
ii  ceph-osd                             15.2.3-0ubuntu0.20.04.2               amd64        OSD server for the ceph storage system
ii  libcephfs2                           15.2.3-0ubuntu0.20.04.2               amd64        Ceph distributed file system client library
ii  python3-ceph-argparse                15.2.3-0ubuntu0.20.04.2               amd64        Python 3 utility libraries for Ceph CLI
ii  python3-ceph-common                  15.2.3-0ubuntu0.20.04.2               all          Python 3 utility libraries for Ceph
ii  python3-cephfs                       15.2.3-0ubuntu0.20.04.2               amd64        Python 3 libraries for the Ceph libcephfs library
Connection to 10.5.1.29 closed.


$ juju ssh ceph-mon/0 'sudo ceph versions'
{
    "mon": {
        "ceph version 15.2.3 (d289bbdec69ed7c1f516e0a093594580a76b78d0) octopus (stable)": 1
    },
    "mgr": {
        "ceph version 15.2.3 (d289bbdec69ed7c1f516e0a093594580a76b78d0) octopus (stable)": 1
    },
    "osd": {
        "ceph version 15.2.3 (d289bbdec69ed7c1f516e0a093594580a76b78d0) octopus (stable)": 3
    },
    "mds": {},
    "overall": {
        "ceph version 15.2.3 (d289bbdec69ed7c1f516e0a093594580a76b78d0) octopus (stable)": 5
    }
}
Connection to 10.5.1.29 closed.