[Bug 1747499] Re: 98-reboot-required and Interaction with livepatch

[Ubuntu Foundations Team Bug Bot]

The attachment "debdiff for unattended-upgrades (focal)" seems to be a
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** Tags added: patch

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https://bugs.launchpad.net/bugs/1747499

Title:
  98-reboot-required and Interaction with livepatch

Status in unattended-upgrades package in Ubuntu:
  Confirmed
Status in update-notifier package in Ubuntu:
  Confirmed

Bug description:
  If a system is using canonical livepatch, has it enabled, and patches
  are applied, it could be confusing for a user to receive a "system
  restart required" messages in the MOTD when logging in.

  That message, when present, is printed by 98-reboot-required which
  essentially just cats /var/run/reboot-required to stdout. That file is
  placed by packages that require a reboot so that they are properly
  used in their updated versions. Examples that come to mind are libc
  and the kernel.

  There is a secondary file that can be created which says which
  packages requested the reboot. That would be /var/run/reboot-
  required.pkgs

  Ideally that script should not print out the reboot required message
  if a) livepatch is installed and enabled; b) the only trigger for the
  reboot is a kernel update.

  For (a), one can use the command "ubuntu-advantage is-livepatch-
  enabled" and check $?. That is in the ubuntu-advantage-tools package.

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