** Description changed:

  [Impact]
  
  Upgrading from ceph on Ubuntu 18.04 causes the ceph-osd services to be
  restarted without prompting.
  
  This appears to be in the configure section on the ceph-common,postinst:
  # Automatically added by dh_systemd_start/11.1.6ubuntu2
  if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = 
"abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
          if [ -d /run/systemd/system ]; then
                  systemctl --system daemon-reload >/dev/null || true
                  if [ -n "$2" ]; then
                          _dh_action=restart
                  else
                          _dh_action=start
                  fi
                  deb-systemd-invoke $_dh_action 'ceph.target' >/dev/null || 
true
          fi
  fi
  # End automatically added section
  
- This is a change of behaviour compare to debhelper 9. 
+ This is a change of behaviour compare to debhelper 9.
  --restart-after-upgrade is the default in compat 10.
  
  The expected behavior during a package upgrade is to leave all the ceph
  service states unmodified. They should not be enabled/disabled or
  stopped/started.
  
  [Test Case]
  * Check pid of ceph-osd (before upgrade)
  * sudo apt-get update
  * sudo apt-get upgrade
  * Check pid of ceph-osd (after upgrade)
  
  If the pid changes, it means ceph-osd has been restarted, and the
  restart or stop/start has been exercised.
  
  [Potential Regression]
  
- [Other Informations]
+ Low, the desire is to control the precise timing of the restart.
+ 
+ The larger context is that there may multiple updates (in this case
+ kernel) and one want a single stop/start when the reboot occurred.
+ 
+ The goal is for the admin to choose when (and which) ceph services move
+ to the new code level.
+ 
+ [Other Information]

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https://bugs.launchpad.net/bugs/1840347

Title:
  Ceph 12.2.12  restarts services during upgrade

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