[Bug 2065515] Re: [SRU] Ceph Squid release candidate

[Niels Ole Salscheider]

I have updated from ubuntu 22.04 with the official ceph reef packages
from ceph itself to ubuntu 24.04. During the update, ceph was updated to
ubuntu's ceph squid snapshot that contained the bug. I now updated to
squid rc2 from proposed, but even after the upgrade the ceph monitor
fails to start up with this error: https://dpaste.com/4QY9VTQKW.txt

It seems that I now have at least one fsmap with the wrong encoding. Do
you have instructions of how to roll back to the previous fsmap? I think
this would be very helpful for anyone who runs into this issue when
updating.

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https://bugs.launchpad.net/bugs/2065515

Title:
  [SRU] Ceph Squid release candidate

Status in Ubuntu Cloud Archive:
  Invalid
Status in Ubuntu Cloud Archive caracal series:
  Triaged
Status in ceph package in Ubuntu:
  Fix Released
Status in ceph source package in Noble:
  Fix Committed
Status in ceph source package in Oracular:
  Fix Released

Bug description:
  [Impact]
  Ubuntu 24.04 LTS users are currently using a development snapshot of Ceph; the upstream project are working towards a release and produced a 19.1.0 RC which we should include in 24.04 as a stepping stone towards release.  There are current know upgrade issues with the development snapshot included.

  [Test Case]
  No reproducer for this bug; RC will be tested in the following ways:

  - As part of a core24 based microceph built from proposed
  - Using the standard OpenStack Regression Testing utilised for validation of OpenStack and Ceph updates under the MRE already in place:

  https://wiki.ubuntu.com/OpenStack/StableReleaseUpdates

  Test results will all be attached to this bug report.

  [Where things might go wrong]
  As this is an RC there will likely be outstanding bugs that will need to be resolved by the upstream project before release; This is expected but the RC will be an improvement on the current development snapshot in terms of quality.

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