[Bug 2081325] Re: Oracular: systemd override file not applied due to systemd unit rename cloud-init.service renamed to cloud-init-network.service in cloud-init v. 24.3.1

[Chad Smith]

Added cloud-init package for oracular just to track this issue for
visibility. The fix needs to be in livecd-rootfs.

** Also affects: cloud-init (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: cloud-init (Ubuntu)
   Importance: Undecided => Critical

** Also affects: livecd-rootfs (Ubuntu Oracular)
   Importance: Critical
     Assignee: Chad Smith (chad.smith)
       Status: Confirmed

** Also affects: cloud-init (Ubuntu Oracular)
   Importance: Critical
       Status: New

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Title:
  Oracular: systemd override file not applied due to systemd unit rename
  cloud-init.service renamed to cloud-init-network.service in cloud-init
  v. 24.3.1

Status in cloud-init package in Ubuntu:
  New
Status in livecd-rootfs package in Ubuntu:
  Confirmed
Status in cloud-init source package in Oracular:
  New
Status in livecd-rootfs source package in Oracular:
  Confirmed

Bug description:
  In Oracular 24.10, cloud-init 24.3.1 renamed cloud-init.service to
  cloud-init-network.service as part of the single-process mode support.
  This is only introduced in Oracular and not applicable to any stable
  releases before Oracular.[1]

  livecd-rootfs provides complete override for the entire cloud-
  init.service in /etc/systemd/system/cloud-init.service to reorder the
  service After=NetworkManager.service NetworkManager-wait-
  online.service and drop # Before=sysinit.target. This overridden file
  is completely ignored in Desktop Oracular images dated 20240916
  because the systemd unit name cloud-init.service doesn't match the new
  cloud-init-network.service name. This results in incorrect systemd
  ordering that may impact cloud-init's ability to download
  configuration when kernel commandline options provide a nocloud seed
  url that requires DNS resolution via a kernel commandline
  'ds=nocloud;s=http://myresolvablehostname/'.

  To fix this issue, livecd-rootfs should be emitting an override file
  to /etc/systemd/system/cloud-init-network.service with the latest
  content provided by cloud-init 24.3.1 in oracular.

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