We run the Luminous/Mimic -> Nautilus upgrade by upgrading Ceph and Debian at the same time, i.e., your first scenario. Didn't encounter any problems with that; the Nautilus upgrade has been very smooth for us and we've migrated almost all of our deployments using our fully automated upgrade assistant; it's just one button that does all the right things in the right order. Paul -- Paul Emmerich Looking for help with your Ceph cluster? Contact us at https://croit.io croit GmbH Freseniusstr. 31h 81247 München www.croit.io Tel: +49 89 1896585 90 On Wed, Apr 29, 2020 at 8:58 PM Herve Ballans &lt;herve.ballans(a)ias.u-psud.fr&gt; wrote: > > Hi Alex, > > Thanks a lot for your tips. I note that for my planned upgrade. > > I take the opportunity here to add a complementary question regarding > the require-osd-release functionality (ceph osd require-osd-release > nautilus ) > > I remember that one time I did that (on another cluster, a proxmox one) > and it took a very long time and had a strong impact on the ceph > performances during this operation (several hours) > > Did you notice that too on your side ? > > Thanks again, > Hervé > > On 29/04/2020 20:39, Alex Gorbachev wrote: > > > > > > > > On Wed, Apr 29, 2020 at 11:54 AM Herve Ballans > > &lt;herve.ballans(a)ias.u-psud.fr <mailto:herve.ballans@ias.u-psud.fr>> wrote: > > > > Hi all, > > > > I'm planning to upgrade one on my Ceph Cluster currently on Luminous > > 12.2.13 / Debian Stretch (updated). > > On this cluster, Luminous is packaged from the official Ceph repo > > (deb > > https://download.ceph.com/debian-luminous/ stretch main) > > > > I would like to upgrade it with Debian Buster and Nautilus using the > > croit.io <http://croit.io> repository (deb > > https://mirror.croit.io/debian-nautilus/ buster > > main) > > > > I already prepared the steps procedure but I just want to verify one > > step regarding the upgrade of the ceph packages. > > > > Do I have to upgrade ceph in the same time than Debian or do i > > have to > > upgrade ceph after the Debian upgrade from Stretch to Buster ? > > > > 1) In the first case : > > > > * Replace stretch by buster in /etc/apt/sources.list > > * Modify the ceph.list repo by croit.io <http://croit.io> one > > * Upgrade the entire nodes > > > > 2) In the second case (upgrade Debian then Ceph) > > > > * Replace stretch by buster in /etc/apt/sources.list > > * keep the /etc/apt/sources.list.d/ceph.list as it is > > * Upgrade and reboot the nodes > > * replace the ceph.list file by croit.io <http://croit.io> > > * upgrade the ceph packages > > * restarting the Ceph services (in the right order MON -> MGR -> OSD > > -> MDS) > > > > Thanks a lot for your advices > > > > Regards, > > Hervé > > > > > > Hi Hervé, > > > > The one thing I had trouble with (and it's primarily from not reading > > the docs very carefully) is that you should NOT enable the messenger 2 > > protocol until all OSDs have been updated. In other words, Ceph will > > complain about not running msgr2, but you should leave it like that > > until all OSDs are on Nautilus. Then you run: > > ceph mon enable-msgr2 > > ceph osd require-osd-release nautilus > > > > Ref: https://docs.ceph.com/docs/master/releases/nautilus/ > > > > -- > > Alex Gorbachev > > Intelligent Systems Services Inc. > > > > > > > > _______________________________________________ > > ceph-users mailing list -- ceph-users(a)ceph.io > > <mailto:ceph-users@ceph.io> > > To unsubscribe send an email to ceph-users-leave(a)ceph.io > > <mailto:ceph-users-leave@ceph.io> > > > _______________________________________________ > ceph-users mailing list -- ceph-users(a)ceph.io > To unsubscribe send an email to ceph-users-leave(a)ceph.io

Herve, On Wed, Apr 29, 2020 at 2:57 PM Herve Ballans &lt;herve.ballans(a)ias.u-psud.fr&gt; wrote: I did not notice any issues with the process. That said, the upgrade was in our lab cluster, which does not do a lot of IO. Things may be different in one of the production clusters, but I will not know for at least a couple of months. -- Alex Gorbachev Intelligent Systems Services Inc.