[Bug 2092329] Re: wg-quick fails with systemd resolvconf compatibility shim

[Lukas Märdian]

Thanks for confirming that this is now working for you!

There was a time when the 22.04 -> 24.04 upgrade did not properly
install the systemd-resolved package (LP: #2054761), maybe you got hit
by that issue. So I'm flagging this as a systemd[-resolved] upgrade
issue.

But I cannot seem to reproduce this in a clean 22.04 Jammy container:

After "apt install resolvconf" and "do-release-upgrade", I get a clean
Noble system with systemd-resolved installed and resolvconf removed. So
I'm setting the systemd task to "Incomplete" until it can be reproduced.

For other hitting this issue, this command should probably fix the
issue:

$ apt install systemd-resolved

** Changed in: wireguard (Ubuntu)
       Status: Incomplete => Invalid

** Also affects: systemd (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: wireguard (Ubuntu)
       Status: Invalid => Incomplete

** Changed in: systemd (Ubuntu)
       Status: New => Incomplete

** Changed in: wireguard (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/2092329

Title:
  wg-quick fails with systemd resolvconf compatibility shim

Status in systemd package in Ubuntu:
  Incomplete
Status in wireguard package in Ubuntu:
  Invalid

Bug description:
  systemd resolvectl supports resolvconf compatibility mode when invoked 
  as resolvconf. Ubuntu 24.04 apparently no more provides the real recolvconf:

  bor at bor-Latitude-E5450:~/tmp$ dpkg-query -S /usr/sbin/resolvconf
  systemd-resolved: /usr/sbin/resolvconf

  This version requires the real interface and fails with wg-quick hack:

  bor at bor-Latitude-E5450:~/tmp$ sudo wg-quick up ./wg0.conf
  [#] ip link add wg0 type wireguard
  [#] wg setconf wg0 /dev/fd/63
  [#] ip -4 address add 192.168.6.160/32 dev wg0
  [#] ip link set mtu 1420 up dev wg0
  [#] resolvconf -a tun.wg0 -m 0 -x
  Failed to resolve interface "tun.wg0": No such device
  [#] ip link delete dev wg0
  bor at bor-Latitude-E5450:~/tmp$

  So, wg-quick became unusable on Ubuntu. It worked fine in Ubuntu
  22.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: wireguard-tools 1.0.20210914-1ubuntu4
  ProcVersionSignature: Ubuntu 6.8.0-50.51.1-lowlatency 6.8.12
  Uname: Linux 6.8.0-50-lowlatency x86_64
  ApportVersion: 2.28.1-0ubuntu3.3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Dec 21 17:13:23 2024
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-trusty-amd64-20140620-0
  InstallationDate: Installed on 2015-07-02 (3460 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
  ProcEnviron:
   LANG=ru_RU.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  SourcePackage: wireguard
  UpgradeStatus: No upgrade log present (probably fresh install)

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