[Bug 1975533] Re: No longer possible to use do-release-upgrade on Groovy

[Launchpad Bug Tracker]

This bug was fixed in the package ubuntu-release-upgrader - 1:21.10.10

---------------
ubuntu-release-upgrader (1:21.10.10) impish; urgency=medium

  * Ship a DistUpgrade.cfg.groovy and demoted.cfg.groovy to allow upgrades
    from Groovy to Impish to be allowed. (LP: #1975533)
  * Run pre-build.sh: updating mirrors, demotions, and translations.

 -- Brian Murray <brian at ubuntu.com>  Mon, 27 Jun 2022 15:47:00 -0700

** Changed in: ubuntu-release-upgrader (Ubuntu Impish)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1975533

Title:
  No longer possible to use do-release-upgrade on Groovy

Status in ubuntu-release-upgrader package in Ubuntu:
  Invalid
Status in ubuntu-release-upgrader source package in Impish:
  Fix Released
Status in ubuntu-release-upgrader source package in Jammy:
  In Progress

Bug description:
  Impact
  ------
  It is not possible for users still running Ubuntu 20.10, an end of life release, to upgrade to a supported release of Ubuntu.

  Test Case
  ---------
  On an Ubuntu 20.10 run `do-release-upgrade` and observe an error message about "an upgrade from Groovy to Impish is not supported".

  With the version of ubuntu-release-upgrader from -proposed (accessible
  by running `do-release-upgrade -p`) the upgrade will be supported and
  complete successfully.

  Regression Potential
  --------------------
  Its possible that the upgrade process could fail and users will be left with a broken system instead of an insecure one. However, we'll test upgrading a standard install of Ubuntu desktop to ensure the process works.

  SRU Note
  --------
  This'll also need fixing in Jammy so people still running Groovy could upgrade to it when Impish reaches its EoL, however that isn't really testable yet so will be fixed in Jammy later.

  Original Description
  --------------------
  I tried running `do-release-upgrade` on an Ubuntu 20.10 (Groovy Gorilla) system and received an error message from dist-upgrader tarball that an upgrade from Groovy to Impish is not supported. This is because DistUpgrade.cfg (distributed by the tarball) contains `From=Hirsute` and `To=Impish`.

  A minimal fix for this would be to create a DistUpgrade.cfg.groovy and
  ensure `From=Groovy`. You'd want to look at the contents of
  DistUpgrade.cfg and DistUpgrade.cfg.focal to sort out what
  DistUpgrade.cfg.groovy should contain. We might also want to create a
  new demoted.cfg file but the demoted.cfg.focal file might capture
  everything that was demoted. (For what its worth I tested an upgrade
  of a stock Ubuntu 20.10 system to Ubuntu 21.10 by copying
  DistUpgrade.cfg.focal to DistUpgrade.cfg.groovy and did not run into
  any issues.

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