This bug was fixed in the package isc-dhcp - 4.4.1-2.3ubuntu5
---------------
isc-dhcp (4.4.1-2.3ubuntu5) kinetic; urgency=medium
* Disable make_resolv_conf() if systemd-resolved is in use (LP: #1972029)
This functionality was moved from systemd 246-2ubuntu1 (enter-hook) to
isc-dhcp 4.4.1-2.1ubuntu7 (exit-hook). The part overriding
make_resolv_conf() was dropped, but is needed to avoid it overriding
/etc/resolv.conf, managed by sd-resolved (stub-resolv.conf).
-- Lukas Märdian <sl...@ubuntu.com> Mon, 18 Jul 2022 15:50:13 +0200
** Changed in: isc-dhcp (Ubuntu Kinetic)
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu.
https://bugs.launchpad.net/bugs/1972029
Title:
dhclient overriding stub-resolv.conf file on Jammy
Status in isc-dhcp package in Ubuntu:
Fix Released
Status in isc-dhcp source package in Jammy:
In Progress
Status in isc-dhcp source package in Kinetic:
Fix Released
Bug description:
[Issue]
On Jammy, the stub-resolv.conf file on /run/systemd/resolve gets overwritten
if dhclient is executed.
While debugging this, I found the reference on LP#1889068 [0] of the
move of `resolved` hook from dhclient-enter-hooks.d/ to dhclient-exit-
hooks.d/, and this new hook [2] has no reference of make_resolv_conf()
being called.
[Reproducer]
-
I used a cloud-image based Jammy installation (uvt-kvm). Once in:
$ cat /run/system/resolve/stub-resolv.conf
And one will see:
nameserver 127.0.0.53
options edns0 trust-ad
search .
Then:
$ sudo dhclient
$ cat /run/system/resolve/stub-resolv.conf
You'll see the definition of the nameserver(s) in, and the stub IP
address no longer there. To revert this, a `systemctl restart
systemd-resolved` is needed.
[Impact]
This is an improper way to keep nameserver(s) in *resolv* files; the
override of the file should never happen in these circumstances.
[Extra]
-
As a minor test, I copied over the dhclient-enter-hooks.d/resolved file from
a Focal installation to a Jammy one, and the problem _does not happen_ when
such hook is in place.
[ . . . ]
Let me know if further clarification is needed to proceed. Thank you.
BR,
pprincipeza
[0] https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1889068
[1] https://paste.ubuntu.com/p/bvqPZXZZ8w/
[2] https://paste.ubuntu.com/p/YQdG6z4WS7/
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1972029/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : touch-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
