[Bug 1827635] Re: dist-upgrader tarball needs updating to support upgrades from bionic to disco

[Brian Murray]

I was able to upgrade to disco with the version of the release upgrader
from -proposed.

root at clean-bionic-amd64:/tmp/ubuntu-release-upgrader-bctl6u37# head -n10 /var/log/dist-upgrade/main.log 
2019-05-09 16:02:07,695 INFO Using config files '['./DistUpgrade.cfg.bionic']'
2019-05-09 16:02:07,695 INFO uname information: 'Linux clean-bionic-amd64 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64'
2019-05-09 16:02:08,038 INFO apt version: '1.6.10'
2019-05-09 16:02:08,038 INFO python version: '3.6.7 (default, Oct 22 2018, 11:32:17) 
[GCC 8.2.0]'
2019-05-09 16:02:08,040 INFO release-upgrader version '19.04.16.4' started
2019-05-09 16:02:08,047 INFO locale: 'en_US' 'UTF-8'
2019-05-09 16:02:08,116 DEBUG setting up environ for non-interactive use
2019-05-09 16:02:08,158 DEBUG Using 'DistUpgradeViewNonInteractive' view
2019-05-09 16:02:08,194 DEBUG enable dpkg --force-overwrite


** Tags removed: verification-needed verification-needed-disco
** Tags added: verification-done verification-done-disco

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https://bugs.launchpad.net/bugs/1827635

Title:
  dist-upgrader tarball needs updating to support upgrades from bionic
  to disco

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Disco:
  Fix Committed

Bug description:
  [Impact]
  Users of Ubuntu 18.04 won't be able to upgrade to 19.04 when 18.10 reaches End of Life.

  [Test Case]
  1) modify ~/.cache/update-manager/meta-release so that Supported: 0 for Ubuntu 18.10
  2) run do-release-upgrade
  3) observe the following message

  "Can not upgrade

  An upgrade from 'bionic' to 'disco' is not supported with this tool."

  With the version of the dist-upgrader from -proposed you'll be able to
  upgrade from 18.04 to 19.04.

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