No DNS inside bootc

[mpiscaer]

There is no DNS resolving possible inside of the image:

❯ bcvk ephemeral run-ssh "ghcr.io/bootcrew/ubuntu-bootc:latest-amd64" -- wget http://www.google.com
--2026-09-10 10:14:31--  http://www.google.com/
Resolving www.google.com (www.google.com)... failed: Temporary failure in name resolution.
wget: unable to resolve host address ‘www.google.com’

This because the /etc/resolv.conf is empty:

root@localhost:/var/roothome# ls -l /etc/resolv.conf
-rw-r--r-- 1 root root 0 Jun 10 02:13 /etc/resolv.conf

Because of this empty file the tmpfiles: /usr/lib/tmpfiles.d/resolv-conf.conf will not create the soft link to the correct systemd-resolve stub file

root@localhost:/var/roothome# cat /run/systemd/resolve/stub-resolv.conf
# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search .
root@localhost:/var/roothome#