[Bug 1646583] Re: Ceph mon and osd don't restart on reboot with Xenial

[James Page]

I switch a ceph-mon unit over to use the ceph-mon@ unit instead; looks
like that won't work well:

Created symlink from /etc/systemd/system/ceph-mon.target.wants/ceph-mon
@juju-0f0ab8-ceph-testing-0.service to /lib/systemd/system/ceph-
mon at .service.

as the ceph-mon target does not exist.  We could introduce the targets
into the packaging but I'm unsure of the systemd behaviour with units
and targets of the same names.

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https://bugs.launchpad.net/bugs/1646583

Title:
  Ceph mon and osd don't restart on reboot with Xenial

Status in ceph package in Ubuntu:
  Triaged

Bug description:
  The ceph monitor and osd daemons do not restart automatically on
  server reboot on Xenial.

  $ apt-cache policy ceph
  ceph:
    Installed: 10.2.2-0ubuntu0.16.04.2
    Candidate: 10.2.2-0ubuntu0.16.04.2
    Version table:
   *** 10.2.2-0ubuntu0.16.04.2 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       10.1.2-0ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  This is likely caused by the same clash between upstream target files
  and Ubuntu systemd unit files that is noted in [1] but I have opened a
  separate bug because I believe the severity of not having Ceph restart
  automatically on server reboot is higher severity than not being able
  to start/stop all services with one command, which is what is reported
  in [1].

  The source of the Ubuntu package [2] does not have the necessary
  target files that upstream Ceph added to allow for restart on reboot
  under this commit [3] which is included in Ceph's github tag 10.2.2.

  
  [1] https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/1627640
  [2] https://bugs.launchpad.net/ubuntu/+source/ceph/10.2.3-0ubuntu0.16.04.2
  [3] https://github.com/ceph/ceph/commit/15c4ad44010c798af7804e287ba71dcc289f806f

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