[Bug 2009699] Re: sytemd-udev package upgrade breaks if udev is masked

[Nick Rosbrook]

** Changed in: systemd (Ubuntu)
   Importance: Undecided => Low

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Title:
  sytemd-udev package upgrade breaks if udev is masked

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  The Anbox Cloud LXD images are based of the standard Ubuntu cloud
  images for LXD but have the systemd-udevd.service unit masked
  (`systemctl mask systemd-udevd.service`) as we do not need udev.

  With the latest security patch on Ubuntu 22.04 upgrading the udev
  package fails:

  ...
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: left to upgrade {'udev', 'libudev1'}
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: applying set ['udev', 'libudev1']
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: Log ended: 2023-03-07  21:33:47
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: Log started: 2023-03-07  21:33:48
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: [614B blob data]
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: Preparing to unpack .../udev_249.11-0ubuntu3.7_arm64.deb ...
  Mar 07 21:33:48 ams-cg3qqttdjmctnqegcqag sh[753]: Unpacking udev (249.11-0ubuntu3.7) over (249.11-0ubuntu3.6) ...
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: Preparing to unpack .../libudev1_249.11-0ubuntu3.7_arm64.deb ...
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: Unpacking libudev1:arm64 (249.11-0ubuntu3.7) over (249.11-0ubuntu3.6) ...
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: Setting up libudev1:arm64 (249.11-0ubuntu3.7) ...
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: Setting up udev (249.11-0ubuntu3.7) ...
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag systemd[1]: Reloading.
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: Failed to restart udev.service: Unit udev.service failed to load properly, please adjust/correct and reload service manager: File exists
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: See system logs and 'systemctl status udev.service' for details.
  Mar 07 21:33:49 ams-cg3qqttdjmctnqegcqag sh[753]: invoke-rc.d: initscript udev, action "restart" failed.

  We can workaround this by doing a patch release to our users next week
  but it would be a lot better if the package scripts check if the
  service unit is masked and if it is avoid restarting udev.service

  The problem isn't introduced with the 249.11-0ubuntu3.7 but should
  exist for longer already. It just became a problem for us due to the
  security patch rolling in via unattended-upgrades

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