[Bug 1828892] Re: systemctl - alias service reports inactive while aliased is active

[Łukasz Zemczak]

Hello Ioanna, or anyone else affected,

Accepted systemd into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.22 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 and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. 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 Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-xenial

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https://bugs.launchpad.net/bugs/1828892

Title:
  systemctl - alias service reports inactive while aliased is active

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

Bug description:
  [Impact]

  'systemctl is-active' command reports an alias service as inactive even though the aliased service
  is active.
  Currently the 'systemctl is-active' command does not load units to minimise its effect on the system (i.e. that a monitoring command does not itself alter the state of the system).
  However, this behaviour leads to inconsistencies when services are aliased.

  [Test case]

  - Test case 1 - libvirtd

  alias service : libvirtd
  aliased service : libvirt-bin

  /etc/systemd/system$ ls -la libvirtd.service 
  lrwxrwxrwx 1 root root 39 May 13 20:49 libvirtd.service -> /lib/systemd/system/libvirt-bin.service

  $ systemctl is-active libvirtd
  inactive

  $ systemctl is-active libvirt-bin
  active

  
  - Test case 2 - sshd

  alias service : sshd
  aliased service : ssh

  /ect/systemd/system$ ls -la sshd.service 
  lrwxrwxrwx 1 root root 31 Mar 19 19:44 sshd.service -> /lib/systemd/system/ssh.service

  $ systemctl is-active sshd
  inactive

  $ systemctl is-active ssh
  active

  
  [Regression Potential]

  This fix may result into systemctl reporting inconsistent information
  concerning the status of a service.

  [Other]

  Upstream issue : https://github.com/systemd/systemd/issues/7875
  Upstream fix : https://github.com/systemd/systemd/pull/7997

  Xenial is affected, fix exists on Bionic onward.

  $ lsb_release -rd
  Description:	Ubuntu 16.04.6 LTS
  Release:	16.04

  $ apt-cache policy systemd
  systemd:
    Installed: 229-4ubuntu21.21
    Candidate: 229-4ubuntu21.21

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