Hi,
I've a 3 node PVE 4.4-18 Cluster with Ceph Hammer and one day I want to upgrade to PVE 5, if possible in place. I've read that PVE 5 requires Ceph Luminous 12.2 and that Ceph has to be upgraded in advance. A post in the Ceph blog says, that 12.2 is released, so a upgrade may be possible...