To be honest I am not confident that "ceph osd set-require-min-compat-client nautilus" is a necessary step for you. What prompted you to run that command?
That step is not listed here: https://docs.ceph.com/en/latest/releases/nautilus/#upgrading-from-mimic-or-l...
You're correct indeed, it's neither listed in the docs for upgrading to Mimic nor Nautilus. It apparently just slipped over from my Luminous upgrade checklist, which I based the Nautilus upgrade steps upon. Anthony D'Atri <aad@dreamsnake.net>
features *happen* to be named after releases don't always correlate 1:1.
That somehow makes sense, but can be a bit confusing. It's good to hear that apparently I did not miss any steps. I wonder whether this should be documented somewhere, and where the chances of folks actually finding it are the best. (docs, manpage) Kind regards Oliver