Public bug reported:
Removing the systemd-resolved package breaks glibc DNSSEC validation,
because it removes an existing line from the new /etc/resolv.conf file.
This line should be retained so that packages like Exim can continue to
use the AD bit after systemd-resolved is removed.
ubuntu@instance:~$ grep -v '^#' /etc/resolv.conf
nameserver 127.0.0.53
options edns0 trust-ad
search vcn.oraclevcn.com
ubuntu@instance:~$ sudo apt remove systemd-resolved
ubuntu@instance:~$ grep -v '^#' /etc/resolv.conf
nameserver 169.254.169.254
search vcn.oraclevcn.com
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2056153
Title:
Removing the systemd-resolved package breaks DNSSEC validation
Status in systemd package in Ubuntu:
New
Bug description:
Removing the systemd-resolved package breaks glibc DNSSEC validation,
because it removes an existing line from the new /etc/resolv.conf
file.
This line should be retained so that packages like Exim can continue
to use the AD bit after systemd-resolved is removed.
ubuntu@instance:~$ grep -v '^#' /etc/resolv.conf
nameserver 127.0.0.53
options edns0 trust-ad
search vcn.oraclevcn.com
ubuntu@instance:~$ sudo apt remove systemd-resolved
ubuntu@instance:~$ grep -v '^#' /etc/resolv.conf
nameserver 169.254.169.254
search vcn.oraclevcn.com
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