I tested a release upgrade from bionic to cosmic with the versions of
update-manager and ubuntu-release-upgrader from -proposed and my third
party mirror enabled - during the upgrade I did not receive the "No
valid mirror" found error message and my sources.list was just rewritten
from bionic to cosmic. Additionally, we can see the new line in /var/log
/dist-upgrade/main.log:

bdmurray@clean-bionic-amd64:~$ apt-cache policy ubuntu-release-upgrader-core
ubuntu-release-upgrader-core:
  Installed: 1:18.04.30
  Candidate: 1:18.04.30
  Version table:
 *** 1:18.04.30 100
        100 /var/lib/dpkg/status
     1:18.04.29 500
        500 http://192.168.10.7/ubuntu bionic-updates/main amd64 Packages
        500 http://192.168.10.7/ubuntu bionic-updates/main i386 Packages
     1:18.04.17 500
        500 http://192.168.10.7/ubuntu bionic/main amd64 Packages
        500 http://192.168.10.7/ubuntu bionic/main i386 Packages
bdmurray@clean-bionic-amd64:~$ grep "overriden" /var/log/dist-upgrade/main.log 
2019-01-23 06:27:37,048 WARNING mirror check skipped, *overriden* via config

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1807032

Title:
  RELEASE_UPGRADER_ALLOW_THIRD_PARTY env variable not passed to dist-
  upgrader tarball

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1807032/+subscriptions

-- 
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to