[systemd-devel] [PATCH v2] networkd: do not change kernel forwarding parameters when IPForwarding is unset

[Tom Gundersen]

On Mon, May 18, 2015 at 6:55 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Fri, 15.05.15 22:49, Tom Gundersen (teg at jklm.no) wrote:
>
>> On Fri, May 15, 2015 at 10:02 PM, Lennart Poettering
>> <lennart at poettering.net> wrote:
>> > On Fri, 15.05.15 12:56, Michael Marineau (michael.marineau at coreos.com) wrote:
>> >
>> >> (build time option to ./configure that is)
>> >
>> > I guess I'd be OK with that...
>>
>> It would be a shame if we started diverging on the defaults I think.
>> Would be nice if we could come up with some scheme that would work for
>> everyone. Would an option be to use a script to append
>> IPForward='kernel' to your network files on upgrades? Pretty dirty,
>> but I don't know how you usually deal with config changes...
>
> Well, I think it is fine if downstream departs from our defaults...

Ok, I guess. As there appears to be no better way.

> Another idea would be to add DefaultIPForward= to
> /etc/systemd/networkd.conf that alters defaults for networks, the same
> way as we have DefaultXYZ= in /etc/systemd/system.conf that affects
> unit defaults?

In principle it sounds like a feature we could add, but I think we
should have a better usecase than just backwards compatibility, then
I'd rather go with the compile-time switch I guess.

-t