On 11/16/20 10:36 AM, Daniel P. Berrangé wrote:
On Mon, Nov 16, 2020 at 10:23:32AM -0500, Laine Stump wrote:
On 11/16/20 2:01 AM, Christian Ehrhardt wrote:
Hi, I have last week discussed breakage in nwfilter usage on IRC
<filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> virsh start <guest> error: Failed to start domain <guest> error: internal error: applyDHCPOnlyRules failed - spoofing not protect
With debug in the logs enabled I got confirmation by Daniel (thanks!) that the command sequence libvirt issued looked kind of "normal".
Hereby I wanted to let you know that some further debugging identified a part of the sequence that libvirt issues as being broken in recent ebtables versions.
# ebtables --concurrent -t nat -N testrule3 # ebtables --concurrent -t nat -E testrule3 testrule3-renamed ebtables v1.8.6 (nf_tables): Chain 'testrule3' doesn't exists
So you're saying you can just run those two commands together and always get the error? (assuming that "testrule3 and testrule3-renamed don't exist beforehand)
From your description it sounds like maybe the error doesn't occur when there is a pause between the two commands - is that right, or am I assuming too much?
I tried the above commands (well, I put the two commands together on a single line separated by ";") on a Fedora 33 system and a RHEL 8.3.0 system, and both of them completed successfully.
I tried it on Fedora 33 and it failed :-)
Strange. Both of my Fedora 33 systems are using iptables-1.8.5 and ebtables-legacy-2.0.11. Is this because they were upgraded rather than fresh installs? That seems kind of... bad. :-/ Whatever the case, I should really remedy that.
It looks like the issue is with iptables-nft impl
This is the fedora ebtables -V: ebtables v2.0.11 (legacy) (December 2011)
And this is the ebtables -V on RHEL 8.3.0: ebtables 1.8.4 (nf_tables)
I guess it means 1.8.5 iptables-nft is broken. I filed a Fedora Bug too which should get more direct attention of the person who's likely to fix this.
https://bugzilla.redhat.com/show_bug.cgi?id=1898130
Regards, Daniel