Package: resolvconf
Version: 1.87
Severity: important
Dear Maintainer,
on every boot:
- /usr/lib/tmpfiles.d/resolvconf.conf via systemd-tmpfiles-setup.service
creates /run/resolvconf/postponed-update
- /lib/systemd/system/resolvconf.service runs `$ resolvconf
--enable-updates`.
If these two events would happen in this order, `$ resolvconf
--enable-updates` would remove the `postponed-update` file and update
`/run/resolvconf/resolv.conf`.
But at least on my system `resolvconf.service` runs before
`systemd-tmpfiles-setup.service`. Just creating the `postponed-update`
file while updates are enabled does not trigger an update. Thus the
empty /run/resolvconf/resolv.conf (also written through
systemd-tmpfiles) is never overwritten, leaving the system without the
ability to resolve DNS names, until `$ resolvconf -u` is run.
This can probably be fixed by adding the following line to the
Unit-Section of resolvconf.service:
After=systemd-tmpfiles-setup.service
I do not believe that will introduce any cycles, but I've also not
looked into that.
Some more information:
This is on a VPS upgraded from buster to bullseye (but still running the
buster kernel)
On my system I have resolved this issue using this Service, creating the
`postponed-update`-file before starting resolvconf.service:
# SPDX-FileCopyrightText: 2021 Timon Reinold <ti...@agon.one>
# SPDX-License-Identifier: GPL-3.0-or-later
[Unit]
Description=Shedule resolvconf update
DefaultDependencies=no
Before=resolvconf.service
[Service]
ExecStart=/sbin/resolvconf -u
[Install]
WantedBy=sysinit.target
but I fear that might exhibit the same SE-Linux issue the commit
159e3214 introducing this issue fixed. The `After=`-Line mentioned above
should be preferred.
-- System Information:
Debian Release: 11.0
APT prefers stable-security
APT policy: (500, 'stable-security'), (500, 'master'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.19.0 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages resolvconf depends on:
ii debconf [debconf-2.0] 1.5.77
ii lsb-base 11.1.0
resolvconf recommends no packages.
resolvconf suggests no packages.
-- Configuration Files:
/etc/resolvconf/resolv.conf.d/base changed [not included]
-- debconf information:
resolvconf/reboot-recommended-after-removal:
* resolvconf/downup-interfaces:
resolvconf/link-tail-to-original: false
* resolvconf/linkify-resolvconf: true
