Hi, We're actually on very similar setup to you with 18.04 and Nautilus and thinking about the 20.04 upgrade process. As for your RGW, I think I would not consider the downgrade. I believe the order is about avoiding issues with newer RGW connecting to older mons and osds. Since you're already in this situation and not having any issues, I would probably continue forward with the upgrade on Mons, then Managers, then osds as per documentation. Then just restart the RGW at the end. I think that trying to downgrade at this point may introduce new issues that you don't currently have. This is just my opinion though, as I have not actually tried this. Do you have a test cluster you could practice on? I would be keen to hear how your upgrade goes. Regards, Richard On Sat, 4 Feb 2023 at 22:10, <r.burrowes(a)auckland.ac.nz> wrote: > > We are finally going to upgrade our Ceph from Nautilus to Octopus, before looking at moving onward. We are still on Ubuntu 18.04, so once on Octopus, we will then upgrade the OS to 20.04, ready for the next upgrade. > > Unfortunately, we have already upgraded our rados gateways to Ubuntu 20.04, last Sept, which had the side effect of upgrading the RGWs to Octopus. So I'm looking to downgrade the rados gateways, back to Nautilus, just to be safe. We can then do the upgrade in the right order. > > I have no idea if the newer Octopus rados gateways will have altered any metadata, that would affect a downgrade back to Nautilus. > > Any advise. > _______________________________________________ > ceph-users mailing list -- ceph-users(a)ceph.io > To unsubscribe send an email to ceph-users-leave(a)ceph.io

Hi, I also would try to avoid a downgrade and agree with Richard. From a ceph perspective the RGWs are just clients and not core services so I wouldn't worry too much if they already are on a newer version. Although I didn't test this specific scenario either there's one cluster we help maintain that is comparable to this, ceph is still running Nautilus but the CephFS kernel clients are running on Octopus already. We don't see any issues with that. Regards, Eugen Zitat von Richard Bade <hitrich(a)gmail.com>om>: