One word of caution: there is one known upgrade issue if you
- upgrade from luminous to nautilus, and then
- run nautilus for a very short period of time (hours), and then
- upgrade from nautilus to octopus
that prevents OSDs from starting. We have a fix that will be in 15.2.1,
but until that is out, I would recommend against the double-upgrade. If
you have been running nautilus for a while (days) you should be fine.
sage
https://tracker.ceph.com/issues/44770