Public bug reported:
Initial symptom: DNS stopped working.
Initial workaround: copy DNS server from gnome system settings to
/etc/resolv.conf manually
Got fed up, saw https://ubuntuforums.org/showthread.php?t=2374857
which led me to
https://askubuntu.com/questions/622470/dns-probe-finished-bad-config-error-in-ubuntu-14-04/622493#622493
To reproduce:
0) observe that /etc/resolv.conf is a symlink to ../run/resolvconf/resolv.conf
(I assume)
1) sudo apt install openvpn
2) configure /etc/openvpn to access the vpn of interest
3) Log in to openvpn, e.g.
cd /etc/openvpn
sudo openvpn --config /etc/openvpn/openvpn.conf --script-security 2
4) observe that /etc/resolv.conf is now a regular file
5) observe that 'sudo resolvconf -u' says '/etc/resolvconf/update.d/libc:
Warning: /etc/resolv.conf is not a symbolic link to
/run/resolvconf/resolv.conf`'
6) log out of openvpn by pressing ^C in its window
7) observe that /etc/resolv.conf is still a regular file (probably a copy of
what was in ../run/resolvconf/resolv.conf before starting openvpn)
8) Reboot
9) voila, dns not working
10) rescue by running sudo dpkg-reconfigure resolvconf, answering 'yes' (and
optionally rebooting)
Problem repeats each time openvpn is used.
Also affects ubuntu 16.04, I think, at least as of the last few weeks.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: openvpn 2.4.3-4ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 25 07:08:15 2017
InstallationDate: Installed on 2017-04-29 (179 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: openvpn
UpgradeStatus: Upgraded to artful on 2017-10-20 (5 days ago)
mtime.conffile..etc.default.openvpn: 2017-04-29T05:55:25.168266
** Affects: openvpn (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful wayland-session
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https://bugs.launchpad.net/bugs/1727368
Title:
starting openvpn, quitting, and then doing 'sudo resolvconf -u ' fails
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