I could deploy
- a focal/ussuri cloud using the source for ceph-mon/ceph-osd = distro-proposed, ceph will be 15.x Octopus, this is fine
- a focal/wallaby cloud using the source for ceph-mon/ceph-osd = cloud:focal-wallaby, ceph will be 16.x Pacific, this also fine
However, the upgrade from the first to the second scenario fails; the info block about this upgrade path is simply missing from the ceph-mon/ceph-osd charms !
Do I miss something?