Ubuntu
systemd package

  1. Bug #2024009
  2. Comment #6

Comment 6 for bug 2024009

Revision history for this message
Nick Rosbrook (enr0n) wrote :

I have verified the fix using systemd 245.4-4ubuntu3.23 from focal-proposed.

On the host, I have a Focal container, and killed the existing DNS servers:

nr@clean-jammy-amd64:~$ lxc list
+-------+---------+------+----------------------------------------------+-----------+-----------+
| NAME | STATE | IPV4 | IPV6 | TYPE | SNAPSHOTS |
 +-------+---------+------+----------------------------------------------+-----------+-----------+
| focal | RUNNING | | fd42:b04:cc58:1a82:216:3eff:fe28:d8d9 (eth0) | CONTAINER | 0 |
 +-------+---------+------+----------------------------------------------+-----------+-----------+
nr@clean-jammy-amd64:~$ systemctl stop systemd-resolved
nr@clean-jammy-amd64:~$ kill -9 $(pgrep dnsmasq)

Then, I start a new DNS server with a record which contains 10 CNAME redirects:

nr@clean-jammy-amd64:~$ sudo dnsmasq --cname=test10.lan,test9.lan --cname=test9.lan,test8.lan --cname=test8.lan,test7.lan --cname=test7.lan,test6.lan --cname=test6.lan,test5.lan --cname=test5.lan,test4.lan --cname=test4.lan,test3.lan --cname=test3.lan,test2.lan --cname=test2.lan,test1.lan --cname=test1.lan,test0.lan -k -i lxdbr0 -z -I lo --host-record=test0.lan,192.168.122.143

...

In the container, I have systemd installed from focal-proposed, and I was able to successfully make the query despite more than 8 CNAME redirects:

root@focal:~# apt policy systemd
systemd:
  Installed: 245.4-4ubuntu3.23
  Candidate: 245.4-4ubuntu3.23
  Version table:
 *** 245.4-4ubuntu3.23 500
        500 http://archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     245.4-4ubuntu3.22 500
        500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
     245.4-4ubuntu3.20 500
        500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
     245.4-4ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
root@focal:~# resolvectl query test10.lan
test10.lan: 192.168.122.143 -- link: eth0
            (test0.lan)

-- Information acquired via protocol DNS in 70.3ms.
-- Data is authenticated: no