upgrade Ceph Octopus to Pacific

1.Enable msgrv2 protocol and update Ceph configuration

#ceph mon enable-msgr2

#ceph mon dump

2.Check if bluestore_fsck_quick_fix_on_mount is disabled

#ceph config get osd bluestore_fsck_quick_fix_on_mount

#ceph config set osd bluestore_fsck_quick_fix_on_mount false

# ceph config set osd bluestore_fsck_quick_fix_on_mount true

3.Preparation on each Ceph cluster node

#sed -i 's/octopus/pacific/' /etc/apt/sources.list.d/ceph.list

#nano /etc/apt/sources.list.d/ceph.list should now look like this

#deb http://download.proxmox.com/debian/ceph-pacific bullseye main

4.Set the 'noout' flag

#ceph osd set noout

5.Upgrade on each Ceph cluster node

#apt update

#apt full-upgrade

6.Restart the monitor daemon

#systemctl restart ceph-mon.target

#ceph mon dump | grep min_mon_release

min_mon_release 16 (pacific)

7.Restart the manager daemons on all nodes

#systemctl restart ceph-mgr.target

#ceph -s

8.Restart the OSD daemon on all nodes

#systemctl restart ceph-osd.target

#ceph status

9.Disallow pre-Pacific OSDs and enable all new Pacific-only functionality

#ceph osd require-osd-release pacific