qa: add nofs upgrade suite
This adds an upgrade suite to ensure that a Ceph cluster without a
CephFS file system does not blow up on upgrade (in particular, that the
MDSMonitor does not trip). This was developed to potentially reproduce
tracker 51673 but the actual cause for that issue was an old encoding
for the MDSMap which was obsoleted in Pacific. You must create a cluster
older than the FSMap (~Hammer or Infernalis) to reproduce. In any case,
this upgrade suite may be useful in the future so let's keep it!
Related-to: https://tracker.ceph.com/issues/51673
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit
9941188116e22104b625d35d7f4137f438632615)
projects / ceph.git / commit