[Bug 1896755] Update Released

[Łukasz Zemczak]

The verification of the Stable Release Update for livecd-rootfs has
completed successfully and the package is now being released to
-updates.  Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1896755

Title:
  Backport snap-preseed work from groovy to focal

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Focal:
  Fix Released
Status in livecd-rootfs source package in Groovy:
  Fix Released

Bug description:
  [Impact]

   * livecd-rootfs when building classic images with snaps preseeded
  doesn't perform any first-boot tasks during image building. It means
  fist boot is computationally intensive. In groovy, livecd-rootfs
  gained ability to precompute snap seeding, apparmor profiles making
  first boot snap seeding a lot faster. Backport the goodies.

  [Test Case]

   * Perform stock build of ubuntu-cpc lxd or qcow cloud image

   * Boot and observe they complete boot, and perfrom snap seeding very
  quickly (i.e. less than a couple of seconds)

  [Regression Potential]

   * Images might fail to build, or be missbuilt. However, these changes
  have been tested on groovy with the same snapd across all SKUs. Thus
  only groovy-vs-focal incompatibilities may arise.

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