[Bug 1891952] Re: systemd-resolved not started when networking enabled

[William Wilson]

Verification passed for groovy.

The attached image verifies the fix in groovy. The first half of the
image shows the installed versions of friendly-recovery, systemd, and
resolvconf, the failed result from "dig www.google.com", and the empty
/etc/resolv.conf. The second half of the image shows an updated
installed version of friendly-recovery, a successful result from "dig
www.google.com", and the correct contents of /etc/resolv.conf

** Attachment added: "lp1891952_groovy.png"
   https://bugs.launchpad.net/ubuntu/+source/friendly-recovery/+bug/1891952/+attachment/5460054/+files/lp1891952_groovy.png

** Tags removed: verification-needed-bionic verification-needed-groovy
** Tags added: verification-done-bionic verification-done-groovy

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to friendly-recovery in Ubuntu.
https://bugs.launchpad.net/bugs/1891952

Title:
  systemd-resolved not started when networking enabled

Status in Release Notes for Ubuntu:
  Fix Released
Status in friendly-recovery package in Ubuntu:
  Fix Released
Status in friendly-recovery source package in Bionic:
  Fix Committed
Status in friendly-recovery source package in Focal:
  In Progress
Status in friendly-recovery source package in Groovy:
  Fix Committed

Bug description:
  I was using friendly-recovery as my Ubuntu desktop session was not
  starting after an upgrade to Groovy Gorilla. When I chose to "Enable
  networking" in the friendly-recovery menu I noticed that no dns
  servers could be reached and come to find out it was because systemd-
  resolved did not start.

  Attached is a photo with some additional information.

  [Impact]

   * If a user has both systemd and resolvconf
     installed, the networking option in friendly
     recovery mode will not work correctly.

   * In this scenario, /etc/resolv.conf will be
     empty and dns resolution will not work

  [Test Case]

   * Ensure both systemd and resolvconf are installed

   * Boot to friendly recovery mode and select the
     network option from the menu

   * Drop to a root shell by selecting the root shell
     option from the menu.

   * `cat /etc/resolv.conf` to make sure it is not
      an empty file

   * Run `dig www.google.com` to ensure dns resolution
     works properly

  [Where problems could occur]

   * It is possible certain resolvconf or systemd-resolved
     configurations could still conflict with each other

   * This would be especially true if a user wanted to use
     one nameserver service for a fully booted system and
     a different service in friendly recovery mode

   * If the nameserver is misconfigured in resolvconf or
     network-manager, it will still be non-functional
     in friendly recovery mode.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-release-notes/+bug/1891952/+subscriptions