[Bug 2066905] Re: LXD snap no longer seeded in any images so does not need special handling in unminimize logic

[Paride Legovini]

[ Noble Verification: server daily image build ]

I downloaded a recent noble-live-server-amd64.iso daily, specifically:

$ bsdtar -x -f noble-live-server-amd64.iso -O .disk/info
20240616

Opened its cd-build-log file:

https://ubuntu-archive-team.ubuntu.com/cd-build-logs/ubuntu-
server/noble/daily-live-20240616.log

which points to this livefs build:

ubuntu-server-live-amd64: https://launchpad.net/~ubuntu-
cdimage/+livefs/ubuntu/noble/ubuntu-server-live/+build/634647

whose buildlog
(https://launchpadlibrarian.net/735405004/buildlog_ubuntu_noble_amd64_ubuntu-
server-live_BUILDING.txt.gz) shows:

Selecting previously unselected package livecd-rootfs.
Preparing to unpack .../153-livecd-rootfs_24.04.71_amd64.deb ...
Unpacking livecd-rootfs (24.04.71) ...
[...]
Setting up livecd-rootfs (24.04.71) ...

and livecd-rootfs (24.04.71) is the version currently in noble-proposed
that we want to verify.

I manually performed an all-defaults install from that ISO and
successfully verified that:

1. right after install, the lxd snap is not installed
2. there is a /usr/sbin/lxc file provided by the lxd-installer package
3. if I run `lxc`, the snap gets auto installed, then lxc from the snap is executed
4. running `lxc` again works fine, running the command from the snap

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https://bugs.launchpad.net/bugs/2066905

Title:
  LXD snap no longer seeded in any images so does not need special
  handling in unminimize logic

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Noble:
  Fix Committed
Status in livecd-rootfs source package in Oracular:
  Fix Released

Bug description:
  The LXD snap is no longer seeded in any images since Noble+ so the
  unminimize logic in https://git.launchpad.net/livecd-rootfs/tree/live-
  build/auto/build?h=ubuntu/noble#n290 and
  https://git.launchpad.net/livecd-rootfs/tree/live-build/ubuntu-
  server/hooks/01-unminimize.chroot_early?h=ubuntu/noble#n17 is no
  longer required.

  lxd-installer can remain installed.

  This applies for Noble+ so requires SRU back to Noble

  [ Impact ]

  Attempting to install LXD snap on unminimize when this is no longer
  required.

  Due to how daily server image builds upgrade to packages from
  -proposed this is also causing server image build failures - see
  https://bugs.launchpad.net/ubuntu/+source/lxd-installer/+bug/2061017

  [ Test Plan ]

   * Successfully build server daily image
   * Build cloud minimal image and confirm unminimize does not install LXD snap

  [ Where problems could occur ]

   * If the server image does not build or if LXD snap continues to be
  installed

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