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[Launchpad Bug Tracker <2015241@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-advantage-tools - 27.14.4~18.04

---------------
ubuntu-advantage-tools (27.14.4~18.04) bionic; urgency=medium

  * Backport new upstream release: (LP: #2011477) to bionic

ubuntu-advantage-tools (27.14.4) lunar; urgency=medium

  * timer: disable update_contract_info job (LP: #2015302)
  * livepatch: prevent livepatch from auto-enabling and subsequently failing
    on non-amd64 systems (LP: #2015241)

ubuntu-advantage-tools (27.14.3) lunar; urgency=medium

  * livepatch: prevent livepatch from auto-enabling and subsequently failing
    on interim releases (LP: #2013409)

ubuntu-advantage-tools (27.14.2~23.04.1) lunar; urgency=medium

  * status:
    - always use dpkg instead of lscpu for fetching architecture
      information (LP: #2012735)

ubuntu-advantage-tools (27.14.1~23.04.1) lunar; urgency=medium

  * New upstream release 27.14.1
    - apt: fix a configuration leak in the apt.get_pkg_candidate_version
      function (LP: #2012642)

ubuntu-advantage-tools (27.14~23.04.1) lunar; urgency=medium

  * d/ubuntu-advantage-tools.{postinst,postrm,preinst}:
    - migrate certain settings out of uaclient.conf to a new file managed by
      the pro config subcommand (LP: #2004280)
  * d/ubuntu-advantage-tools.postinst:
    - refactor PREVIOUS_PKG_VER as a global variable
    - simplify how we add notices
  * New upstream release 27.14 (LP: #2011477)
    - api: new u.unattended_upgrades.status.v1 endpoint for querying status of
      unattended upgrades
    - apt:
      + remove legacy apt-hook
      + deliver json apt-hook for interim releases
      + fix cloud identification logic in json apt-hook
      + make all calls to esm-cache isolated from system configuration
        (LP: #2008280)
      + only set up the esm cache on supported systems (LP: #2004018)
    - fix:
      + format the output to be more readable (LP: #1926182)
      + add option to attach during a fix without a token
      + verify if fixed version can be installed before trying (LP: #2006705)
    - livepatch: show warning if current kernel is not supported
    - locks: alert user about corrupted lock files (LP: #1996931)
    - logging: logs are now formatted as jsonlines
    - motd: remove esm-apps announcement
    - notices: new representation on disk as separate files (LP: #1987738)
    - realtime: remove ubuntu-realtime package on disablement
    - status:
      + removed contract info update check network call
      + no longer includes warnings about notices when non-root (LP: #2006138)
      + unattached status sends virt type to contract server for better
        resource availability calculation
    - timer jobs: add daily job to check for contract updates
    - yaml: always import distro-provided pyyaml (LP: #2007234, LP: #2007241)

 -- Renan Rodrigo <renanrodrigo@xxxxxxxxxxxxx>  Thu, 06 Apr 2023
10:49:20 -0300

** Changed in: ubuntu-advantage-tools (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

** Changed in: ubuntu-advantage-tools (Ubuntu Focal)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2015241

Title:
  "pro attach" tries to enable livepatch on non-amd64 LTSs and fails

Status in ubuntu-advantage-tools package in Ubuntu:
  Fix Released
Status in ubuntu-advantage-tools source package in Xenial:
  Fix Released
Status in ubuntu-advantage-tools source package in Bionic:
  Fix Released
Status in ubuntu-advantage-tools source package in Focal:
  Fix Released
Status in ubuntu-advantage-tools source package in Jammy:
  Fix Released
Status in ubuntu-advantage-tools source package in Kinetic:
  Fix Released

Bug description:
  [ Impact ]
  `pro attach` fails on non-amd64 systems because it attempts to enable livepatch, which is only built for amd64, and errors.

  The fix is to honor the existing "architecture" affordance which
  specifies which architectures livepatch can be enabled on.

  [ Test Plan ]
  `pro attach` on an arm64 system.

  Before the fix, it will fail while enabling Livepatch.

  After the fix, it will not attempt to enable livepatch.

  [ Where problems could occur ]
  The affordance checking code now runs before enabling livepatch. This is well-tested, but if there is an error, then the bug could reoccur in some situation.
  More likely, is that we forget to add a supported architecture to the list of supported architectures in the future - which would prevent livepatch from getting enabled on that future supported architecture.

  [ Other Info ]
  This bug occurred because we were relaxing our affordance checking before enabling livepatch - in order to allow livepatch client to be the source of truth for whether a certain kernel is supported or not. This is generally good and works for kernel versions and flavors, but interim releases and non-amd64 architectures are not supported at all, so they need to be treated specially.

  [ Original Description ]
  27.14.3 on jammy arm64:
  ubuntu@j-uat:~$ sudo pro attach <redacted>
  Enabling default service esm-apps
  Updating package lists
  Ubuntu Pro: ESM Apps enabled
  Enabling default service esm-infra
  Updating package lists
  Ubuntu Pro: ESM Infra enabled
  Enabling default service livepatch
  Installing canonical-livepatch snap
  Stderr: error: snap "canonical-livepatch" is not available on latest/stable but other
         tracks exist.

         Please be mindful that different tracks may include different features.
         Get more information with 'snap info canonical-livepatch'.

  Stdout:
  Stderr: error: snap "canonical-livepatch" is not available on latest/stable but other
         tracks exist.

         Please be mindful that different tracks may include different features.
         Get more information with 'snap info canonical-livepatch'.

  Stdout:
  Stderr: error: snap "canonical-livepatch" is not available on latest/stable but other
         tracks exist.

         Please be mindful that different tracks may include different features.
         Get more information with 'snap info canonical-livepatch'.

  Stdout:
  Stderr: error: snap "canonical-livepatch" is not available on latest/stable but other
         tracks exist.

         Please be mindful that different tracks may include different features.
         Get more information with 'snap info canonical-livepatch'.

  Stdout:
  Failed to enable default services, check: sudo pro status

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