** Changed in: resolvconf (Debian)
Status: Unknown => Won't Fix
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https://bugs.launchpad.net/bugs/1675571
Title:
Cloud-init update renders secondary addresses to be incompatible with
standard tools
Status in cloud-init:
Confirmed
Status in curtin:
Confirmed
Status in cloud-init package in Ubuntu:
Confirmed
Status in resolvconf package in Ubuntu:
New
Status in resolvconf package in Debian:
Won't Fix
Bug description:
The change of how cloud-init renders
/etc/network/interface.d/50-cloud-init.cfg, standard tools no longer work as
expected:
* resolvconf will nullify nameservers
* if* commands ignore secondary addresses
[ORIGINAL REPORT]
Regresion from Bug #1657940.
When provisioning with multiple eth0 addresses, /etc/resolv.conf is
empty:
Consider:
root@tester:~# cat /etc/network/interfaces.d/50-cloud-init.cfg
# This file is generated from information provided by
# the datasource. Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 138.197.98.102
dns-nameservers 8.8.8.8 8.8.4.4
gateway 138.197.96.1
netmask 255.255.240.0
# control-alias eth0
iface eth0 inet static
address 10.17.0.11
netmask 255.255.0.0
Which then yields an empty /etc/resolv.conf:
root@tester:/run/resolvconf# cat interface/eth0.inet
root@tester:/run/resolvconf# cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
The problem is that resolvconfg does pattern matching for eth*.inet.
The second definition of eth0 has no nameserver and therefore
overrides the definition.
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