[Bug 1646583] Re: Ceph mon doesn't restart on reboot with Xenial when using ceph-{mon, osd}@ systemd units

[Samuel Matzek]

I reproduced this again as well and it seems the OSDs do restart OK on
reboot while the Mon does not.   I must have been confused when writing
the bug as I opened it several days after encountering the issue.

Ceph-Ansible does the following to enable the ceph-mon in the init
sequence and it is using the ceph-mon@ target.

https://github.com/ceph/ceph-ansible/blob/master/roles/ceph-mon/tasks/start_monitor.yml#L46
- name: start and add that the monitor service to the init sequence (for or after infernalis)
  command: systemctl enable ceph-mon@{{ monitor_name }}
  changed_when: false
  failed_when: false
  when:
    - use_systemd
    - ceph_release_num.{{ ceph_release }} > ceph_release_num.hammer


** Summary changed:

- Ceph mon and osd don't restart on reboot with Xenial when using ceph-{mon,osd}@ systemd units
+ Ceph mon doesn't restart on reboot with Xenial when using ceph-{mon,osd}@ systemd units

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

Title:
  Ceph mon doesn't restart on reboot with Xenial when using
  ceph-{mon,osd}@ systemd units

Status in ceph package in Ubuntu:
  In Progress
Status in ceph source package in Xenial:
  Triaged
Status in ceph source package in Yakkety:
  Triaged
Status in ceph source package in Zesty:
  In Progress

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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