ceph-mds dependency

[Nick Niehoff]

I have a small lab nautilus ceph cluster, the 3 mon nodes are running mon, mds, mgr, and rgw services. I am using package from the Ubuntu cloud archive on eoan. Yesterday I decided to install the ceph-mgr-dashboard package. When I did this several other packages were upgraded at the same time:

python3-ceph-argparse:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), libradosstriper1:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph-common:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph-mgr:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph-mon:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph-osd:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), radosgw:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), libcephfs2:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), librbd1:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), python3-rbd:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph-base:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), librgw2:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), ceph:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), python3-rados:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), python3-cephfs:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1), librados2:amd64 (14.2.2-0ubuntu3, 14.2.4-0ubuntu0.19.10.1)

Today I notice that ceph-mds is having issues, when I tried to restart the mds service I see the following in the journal:

/usr/bin/ceph-mds: symbol lookup error: /usr/bin/ceph-mds: undefined symbol: _ZTVN4ceph6buffer5errorE

I then ran an apt upgrade to find ceph-mds had NOT been upgraded with the list above and thus the broken library linking. Somewhere there is a dependency missing on ceph-mds for this upgrade.

Here is my apt history:
https://paste.ubuntu.com/p/PtbCzKzQWp/

[James Page (james-page)]

The ceph-mds package lacks a binary version pinned dependency on ceph-base (which the -mon,-osd and other packages all have).

The missing symbol is a generated C++ symbol for which we can't do accurate version tracking so I think we need to add:

  ceph-base (= ${binary:Version}),

to the ceph-mds package.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ceph - 15.2.0-0ubuntu1

---------------
ceph (15.2.0-0ubuntu1) focal; urgency=medium

  * New upstream release for Ceph Octopus.
  * d/control: Fix dependencies for ceph-mds package to avoid issues
    with missing C++ symbols (LP: #1862850).

 -- James Page <email address hidden> Wed, 25 Mar 2020 08:29:08 +0000