[Bug 1948476] Re: [SRU] Allow target units to fail

[Łukasz Zemczak]

Hello Alfonso, or anyone else affected,

Accepted systemd into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/245.4-4ubuntu3.14 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: systemd (Ubuntu Focal)
       Status: In Progress => Fix Committed

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

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https://bugs.launchpad.net/bugs/1948476

Title:
  [SRU] Allow target units to fail

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Focal:
  Fix Committed

Bug description:
  [Impact]

  A systemd regression in focal made it think that target units cannot
  fail, which produced warnings like:

  emergency.target: Requested dependency OnFailure=reboot.target ignored
  (target units cannot fail).

  So the OnFailure settings are ignored for targets (see
  https://github.com/snapcore/core-initrd/issues/33 for details).
  Upstream fixed the issue in v246:
  https://github.com/systemd/systemd/commit/94d1ddbd7cd15b1073757eb5ae0645c83f0b414c

  [Test Plan]

  Test on a UC system and check that the above warnings are not shown
  anymore. Check that when a target service type fails, the OnFailure
  setting is used and the mentioned service is run.

  [Where problems could occur]

  Issues might happen if some target has an OnFailure setting that was
  never run in the past because of this bug, and the behavior is not
  really right because it was never tested. However, OnFailure is not
  used that much on 20.04 in target services:

  /lib/systemd $ find . -name \*.target | xargs grep OnFailure
  /lib/systemd $ 
  /etc/systemd $ find . -name \*.target | xargs grep OnFailure
  /etc/systemd $ 

  I've seen it only in emergency.target for UC20.

  [Other Info]
   
  None

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