Hello List, i followed: https://ceph.io/releases/v15-2-0-octopus-released/ I came from a healthy nautilus and i am stuck at: 5.) Upgrade all OSDs by installing the new packages and restarting the ceph-osd daemons on all OSD host When i try to start an osd like this, i get: /usr/bin/ceph-osd -f --cluster ceph --id 32 --setuser ceph --setgroup ceph ... 2020-03-25T20:11:03.292+0100 7f2762874e00 -1 osd.32 57223 log_to_monitors {default=true} ceph-osd: /build/ceph-15.2.0/src/osd/PeeringState.cc:109: void PGPool::update(ceph::common::CephContext*, OSDMapRef): Assertion `map->require_osd_release >= ceph_release_t::mimic' failed. ceph-osd: /build/ceph-15.2.0/src/osd/PeeringState.cc:109: void PGPool::update(ceph::common::CephContext*, OSDMapRef): Assertion `map->require_osd_release >= ceph_release_t::mimic' failed. *** Caught signal (Aborted) ** in thread 7f274854f700 thread_name:tp_osd_tp Aborted My current status: root@ceph03:~# ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 60.70999 root default -2 20.25140 host ceph01 0 hdd 1.71089 osd.0 up 1.00000 1.00000 8 hdd 2.67029 osd.8 up 1.00000 1.00000 11 hdd 1.59999 osd.11 up 1.00000 1.00000 12 hdd 1.59999 osd.12 up 1.00000 1.00000 14 hdd 2.79999 osd.14 up 1.00000 1.00000 18 hdd 1.59999 osd.18 up 1.00000 1.00000 22 hdd 2.79999 osd.22 up 1.00000 1.00000 23 hdd 2.79999 osd.23 up 1.00000 1.00000 26 hdd 2.67029 osd.26 up 1.00000 1.00000 -3 23.05193 host ceph02 2 hdd 2.67029 osd.2 up 1.00000 1.00000 3 hdd 2.00000 osd.3 up 1.00000 1.00000 7 hdd 2.67029 osd.7 up 1.00000 1.00000 9 hdd 2.67029 osd.9 up 1.00000 1.00000 13 hdd 2.00000 osd.13 up 1.00000 1.00000 16 hdd 1.59999 osd.16 up 1.00000 1.00000 19 hdd 2.38409 osd.19 up 1.00000 1.00000 24 hdd 2.67020 osd.24 up 1.00000 1.00000 25 hdd 1.71649 osd.25 up 1.00000 1.00000 28 hdd 2.67029 osd.28 up 1.00000 1.00000 -4 17.40666 host ceph03 5 hdd 1.71660 osd.5 down 1.00000 1.00000 6 hdd 1.71660 osd.6 down 1.00000 1.00000 10 hdd 2.67029 osd.10 down 1.00000 1.00000 15 hdd 2.00000 osd.15 down 1.00000 1.00000 17 hdd 1.20000 osd.17 down 1.00000 1.00000 20 hdd 1.71649 osd.20 down 1.00000 1.00000 21 hdd 2.00000 osd.21 down 1.00000 1.00000 27 hdd 1.71649 osd.27 down 1.00000 1.00000 32 hdd 2.67020 osd.32 down 1.00000 1.00000 root@ceph03:~# ceph osd dump | grep require_osd_release require_osd_release nautilus root@ceph03:~# ceph osd versions { "ceph version 14.2.8 (88c3b82e8bc76d3444c2d84a30c4a380d6169d46) nautilus (stable)": 19 } oot@ceph03:~# ceph mon dump | grep min_mon_release dumped monmap epoch 12 min_mon_release 15 (octopus) ceph versions { "mon": { "ceph version 15.2.0 (dc6a0b5c3cbf6a5e1d6d4f20b5ad466d76b96247) octopus (rc)": 3 }, "mgr": { "ceph version 15.2.0 (dc6a0b5c3cbf6a5e1d6d4f20b5ad466d76b96247) octopus (rc)": 3 }, "osd": { "ceph version 14.2.8 (88c3b82e8bc76d3444c2d84a30c4a380d6169d46) nautilus (stable)": 19 }, "mds": { "ceph version 15.2.0 (dc6a0b5c3cbf6a5e1d6d4f20b5ad466d76b96247) octopus (rc)": 3 }, "overall": { "ceph version 14.2.8 (88c3b82e8bc76d3444c2d84a30c4a380d6169d46) nautilus (stable)": 19, "ceph version 15.2.0 (dc6a0b5c3cbf6a5e1d6d4f20b5ad466d76b96247) octopus (rc)": 9 } } Why does it complain about map->require_osd_release >= ceph_release_t::mimic ? Cheers, Michael