[Bug 1919261] Re: Upgrading Ceph from 14.2.11-0ubuntu0.19.10.1~cloud4 to 15.2.8-0ubuntu0.20.04.1~cloud0 fails when ceph-mds is installed

[Brian Murray]

Hello Fabio, or anyone else affected,

Accepted ceph into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/ceph/15.2.16-0ubuntu0.20.04.1 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: ceph (Ubuntu Focal)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1919261

Title:
  Upgrading Ceph from 14.2.11-0ubuntu0.19.10.1~cloud4 to
  15.2.8-0ubuntu0.20.04.1~cloud0 fails when ceph-mds is installed

Status in Ubuntu Cloud Archive:
  Invalid
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in ceph package in Ubuntu:
  Invalid
Status in ceph source package in Focal:
  Fix Committed

Bug description:
  [Impact]
  Package upgrades will fail due to a move of a file between packages

  [Test Case]
  Install ceph-mds 14.2.11-0ubuntu0.19.10.1~cloud4 (from UCA) on bionic
  do-release-upgrade to focal
  package upgrade will fail.

  [Where problems could occur]
  Version declarations might not be correct; upgrade might still break with the same conflict.

  [Original Bug Report]
  In a host where ceph-mds is installed, upgrading from 14.2.11-0ubuntu0.19.10.1~cloud4 to 15.2.8-0ubuntu0.20.04.1~cloud0 fails with:

  dpkg: error processing archive /tmp/apt-dpkg-install-Zen6uw/9-ceph-common_15.2.8-0ubuntu0.20.04.1~cloud0_amd64.deb (--unpack):
   trying to overwrite '/usr/bin/cephfs-data-scan', which is also in package ceph-mds 14.2.11-0ubuntu0.19.10.1~cloud4
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
  Errors were encountered while processing:
   /tmp/apt-dpkg-install-Zen6uw/9-ceph-common_15.2.8-0ubuntu0.20.04.1~cloud0_amd64.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  The problem happens because /usr/bin/cephfs-data-scan is provided by
  ceph-mds in 14.2.11-0ubuntu0.19.10.1~cloud4:

  # dpkg -S /usr/bin/cephfs-data-scan
  ceph-mds: /usr/bin/cephfs-data-scan

  However in 15.2.8-0ubuntu0.20.04.1~cloud0 it is provided by ceph-
  common:

  # dpkg -S /usr/bin/cephfs-data-scan
  ceph-common: /usr/bin/cephfs-data-scan

  A quick workaround is to temporarily remove ceph-mds before the
  upgrade (dpkg -r ceph-mds) and then perform the upgrade process using
  apt install. It will upgrade all packages and reinstall ceph-mds.

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