From what I can gather, this will not be smooth at all, since I can't
make an inplace upgrade of the
OS first and then Ceph and neither other way around.
I think easier would be to upgrade one node at a time from centos7 to ... + nautilus. And when that is done do the upgrade to pacific.
My upgrade plan from Centos+Nautilus on bare metal is:
#1. convert/upgrade to Octopus in podman containers
#2 For OSD servers:
- a fresh OS install of ... without touching the OSD devices
- use final step of https://tracker.ceph.com/issues/46691 to
recreate the systemd/var components to restore the OSDs.
#3 For Mon/MGR servers:
- use orchestration to vacate the server to be updated,
install fresh ... OS with podman
- use orchestration to redeploy mon/mgr to the server.
I've tested #1-3 on a dev cluster (Centos7+Nautilus -> Rocky8.5+Octopus)
and recently completed step #1 on production.
--
Gary Molenkamp Computer Science/Science Technology Services
Systems Administrator University of Western Ontario
molenkam@xxxxxx http://www.csd.uwo.ca
(519) 661-2111 x86882 (519) 661-3566
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