Public bug reported:

Hi,

after upgrading an LXD guest machine from 22.04 to 24.04.1, systemctl
complains that units are failing:

● unbound-resolvconf.service loaded failed failed Unbound asyncronous
resolvconf update helper

Aug 31 19:19:25 install systemd[1]: Started unbound-resolvconf.service - 
Unbound asyncronous resolvconf update helper.
Aug 31 19:19:25 install resolvconf[414]: Dropped protocol specifier '.unbound' 
from 'lo.unbound'. Using 'lo' (ifindex=1).
Aug 31 19:19:25 install resolvconf[414]: No DNS servers specified, refusing 
operation.
Aug 31 19:19:25 install systemd[1]: unbound-resolvconf.service: Main process 
exited, code=exited, status=1/FAILURE
Aug 31 19:19:25 install systemd[1]: unbound-resolvconf.service: Failed with 
result 'exit-code'.


# /usr/libexec/unbound-helper resolvconf_start

Dropped protocol specifier '.unbound' from 'lo.unbound'. Using 'lo' (ifindex=1).
No DNS servers specified, refusing operation.


Looks like

https://groups.google.com/g/linux.debian.bugs.dist/c/rdluvEnL6BE

https://discuss.linuxcontainers.org/t/erratic-network-initialization-in-
lxc-container-with-unbound-dns/18680

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: unbound 1.19.2-1ubuntu3.1
ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
Uname: Linux 6.8.0-41-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
CloudBuildName: server
CloudSerial: 20221101.1
Date: Sun Sep  1 02:17:43 2024
SourcePackage: unbound
UpgradeStatus: Upgraded to noble on 2024-08-31 (0 days ago)
modified.conffile..etc.init.d.apport: [modified]
mtime.conffile..etc.init.d.apport: 2024-07-22T17:59:07

** Affects: unbound (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cloud-image noble

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https://bugs.launchpad.net/bugs/2078599

Title:
  unbound-resolvconf.service fails in LXD

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