Re: NM controlled bridge turns on netfilter

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On 10/04/2014 01:35 PM, Adam Williamson wrote:
On Fri, 2014-10-03 at 18:04 -0300, Bruno Medeiros wrote:
On Fri, Oct 3, 2014 at 2:36 PM, Adam Williamson <adamwill@xxxxxxxxxxxxxxxxx>
wrote:

I don't know why you see it as an F19 to F20 regression, because I'm
fairly sure it's been broken the whole time.

I have two servers now running libvirtd + firewalld + NM, one is F19 and
the other (the newest) one is F20. I just checked here and the F19 server
has neither /etc/modules-load.d nor /etc/udev/rules.d files regarding the
workaround. So, for some reason, it works on F19! Maybe the order systemd
runs something.. I don't know. I just know that I followed the same
procedure I used to setup libvirt on F19 to setup F20 and it didn't work
(at least without the workaround).
There's about a dozen other ways you could possibly work around it -
there may be a script in rc.local or something? I'm fairly sure there's
nothing in any Fedora release to 'fix' it.

Thank you for pointing the current bug, I think it should be linked to the
original one (https://bugzilla.redhat.com/show_bug.cgi?id=512206) because
it can drive someone crazy! ;)
Sure, throw a comment in or something!

I also think that there should be a warning on libvirt doc pointing to your
write-up (or the bug) in case someone decides to use NM instead of network.
The problem with adding docs to *everything* is you have to remember to
take them out again when the bug is actually fixed...I'd probably rather
just get the damn thing fixed, it really shouldn't be much trouble but
it keeps winding up stuck between teams.
OK, I posted my suggested "temporary" solution to the BZ report:
https://bugzilla.redhat.com/show_bug.cgi?id=634736

Someone suggested a reasonable solution to the problem would be to simply add the bridge module to the basic kernel. As a quick, simple fix (and not really a horrible hack) I add to file to /etc/modules-load.d/ for bridge. Tested and works on Fedora 20 and Fedora 21 on all of my systems. Without the early load some systems worked and some did not (reliably and repeatable).

Adam, I suggest that you add this to your writeup on bridging.

BTW, a great big THANK YOU for working out how to do bridging when running NetworkManager.

Gene
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