Bug#988496: live-boot: /etc/resolv.conf empty when using resolvconf
Package: live-boot
Version: 1:20210208
Severity: important
Tags: patch
Hi,
We are using live-boot together with resolvconf. Our
/etc/network/interfaces is generated on boot and uses a static config
without DHCP. So the DCHP client in the initrd will be the only DHCP
client.
Once the system is booted, /etc/resolv.conf stays empty.
When using resolvconf, writing the resolv.conf settings into
`/etc/resolvconf/resolv.conf.d/base` is not enough. `/etc/resolv.conf`
pointing to `/run/resolvconf/resolv.conf` will stay empty.
So in addition to copying resolv.conf into
`/etc/resolvconf/resolv.conf.d/base`, generate
`/run/resolvconf/resolv.conf` by adding the head and tail.
A tested patch is attached that generates /run/resolvconf/resolv.conf
when using resolvconf.
--
Benjamin Drung
Senior DevOps Engineer and Debian & Ubuntu Developer
Compute Platform Operations
1&1 IONOS SE | Greifswalder Str. 207 | 10405 Berlin | Deutschland
E-Mail: benjamin.drung@ionos.com | Web: www.ionos.de
Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 24498
Vorstand: Hüseyin Dogan, Dr. Martin Endreß, Claudia Frese, Henning
Kettler, Arthur Mai, Matthias Steinberg, Achim Weiß
Aufsichtsratsvorsitzender: Markus Kadelke
Member of United Internet
>From 1e463cc32f4599617b52e4a872f0e26b46e47ab0 Mon Sep 17 00:00:00 2001
From: Benjamin Drung <benjamin.drung@ionos.com>
Date: Wed, 12 May 2021 13:19:26 +0200
Subject: [PATCH] Generate /run/resolvconf/resolv.conf when using resolvconf
When using resolvconf, writing the resolv.conf settings into
`/etc/resolvconf/resolv.conf.d/base` is not enough. `/etc/resolv.conf`
pointing to `/run/resolvconf/resolv.conf` will stay empty.
So in addition to copying resolv.conf into
`/etc/resolvconf/resolv.conf.d/base`, generate
`/run/resolvconf/resolv.conf` by adding the head and tail.
Signed-off-by: Benjamin Drung <benjamin.drung@ionos.com>
---
components/9990-main.sh | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/components/9990-main.sh b/components/9990-main.sh
index b50952f..3fcfc9f 100755
--- a/components/9990-main.sh
+++ b/components/9990-main.sh
@@ -189,6 +189,15 @@ Live ()
then
log_begin_msg "Copying /etc/resolv.conf to ${DNSFILE}"
cp -v /etc/resolv.conf "${DNSFILE}"
+ if test -e "${rootmnt}/etc/resolvconf/resolv.conf.d/head" && \
+ test -e "${rootmnt}/etc/resolvconf/resolv.conf.d/base" && \
+ test -e "${rootmnt}/etc/resolvconf/resolv.conf.d/tail"; then
+ mkdir -p /run/resolvconf
+ cat "${rootmnt}/etc/resolvconf/resolv.conf.d/head" \
+ "${rootmnt}/etc/resolvconf/resolv.conf.d/base" \
+ "${rootmnt}/etc/resolvconf/resolv.conf.d/tail" \
+ > /run/resolvconf/resolv.conf
+ fi
log_end_msg
fi
--
2.27.0
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