<div dir="ltr"><div>O yes, I restarted the openvswitch to make the driver change.</div><div>I did not see into openvswitch I ran:</div><div><br></div><div>virsh domiflist instancename and I saw the instance interface was under qbr (and this is the problem),</div><div>I aldo tried on the migrated node to detach the interface from qbr and attach it under br-int like suggested with the method suggested at this link:<a href="https://docs.openstack.org/neutron/pike/contributor/internals/openvswitch_firewall.html">https://docs.openstack.org/neutron/pike/contributor/internals/openvswitch_firewall.html</a></div><div>But virsh does not allow to change the bridge on the fly</div><div>Ignazio<br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno gio 12 mar 2020 alle ore 17:18 James Denton <<a href="mailto:james.denton@rackspace.com">james.denton@rackspace.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal">Hi Ignazio,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">> but the node where I migrated continues to create the qbr bridge also if it is configured with openvswitch firewall.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I assume the neutron-openvswitch-agent has been restarted since making the firewall_driver change? What happens if you create a new VM on that compute?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">> The difference if that if I do not update the database I can ping the migrated vm, while now I cannot<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Can you look at br-int and see if your tap interface is connected without a vlan tag? Or is the tap still connected to the qbr bridge? If the latter, were any iptables rules created?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Unfortunately, I don’t have the ability to test this w/ live migration.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">James <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><b><span style="font-size:12pt;color:black">From: </span></b><span style="font-size:12pt;color:black">Ignazio Cassano <<a href="mailto:ignaziocassano@gmail.com" target="_blank">ignaziocassano@gmail.com</a>><br>
<b>Date: </b>Thursday, March 12, 2020 at 11:50 AM<br>
<b>To: </b>James Denton <<a href="mailto:james.denton@rackspace.com" target="_blank">james.denton@rackspace.com</a>><br>
<b>Cc: </b>openstack-discuss <<a href="mailto:openstack-discuss@lists.openstack.org" target="_blank">openstack-discuss@lists.openstack.org</a>><br>
<b>Subject: </b>Re: [qeeens][neutron] migrating from iptables_hybrid to openvswitch<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal" style="line-height:12pt;background:rgb(255,235,156) none repeat scroll 0% 0%"><b><span style="font-size:10pt;color:rgb(156,101,0)">CAUTION:</span></b><span style="font-size:10pt;color:black"> This message originated externally, please use caution when clicking on links or
opening attachments!<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hello James; I made the db update before live migrating the virtual machine, but the node where I migrated continues to create the qbr bridge also if it is configured with openvswitch firewall.<u></u><u></u></p>
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<p class="MsoNormal">The difference if that if I do not update the database I can ping the migrated vm, while now I cannot<u></u><u></u></p>
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<p class="MsoNormal">Ignazio<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Il giorno gio 12 mar 2020 alle ore 13:30 James Denton <<a href="mailto:james.denton@rackspace.com" target="_blank">james.denton@rackspace.com</a>> ha scritto:<u></u><u></u></p>
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<p class="MsoNormal">Hi Ignazio,<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I tested a process that converted iptables_hybrid to openvswitch in-place, but not without a hard reboot of the VM and some massaging of the existing bridges/veths. Since you are
live-migrating, though, you might be able to get around that.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Regardless, to make this work, I had to update the port’s vif_details in the Neutron DB and set ‘ovs_hybrid_plug’ to false. Something like this:<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">> use neutron;<u></u><u></u></p>
<p class="MsoNormal">> update ml2_port_bindings set vif_details='{"port_filter": true, "bridge_name": "br-int", "datapath_type": "system", "ovs_hybrid_plug": false}' where port_id='3d88982a-6b39-4f7e-8772-69367c442939'
limit 1;<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">So, perhaps making that change prior to moving the VM back to the other compute node will do the trick.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Good luck!<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">James<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"><b><span style="font-size:12pt;color:black">From:
</span></b><span style="font-size:12pt;color:black">Ignazio Cassano <<a href="mailto:ignaziocassano@gmail.com" target="_blank">ignaziocassano@gmail.com</a>><br>
<b>Date: </b>Thursday, March 12, 2020 at 6:41 AM<br>
<b>To: </b>openstack-discuss <<a href="mailto:openstack-discuss@lists.openstack.org" target="_blank">openstack-discuss@lists.openstack.org</a>><br>
<b>Subject: </b>[qeeens][neutron] migrating from iptables_hybrid to openvswitch</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<b><span style="font-size:10pt;color:rgb(156,101,0)">CAUTION:</span></b><span style="font-size:10pt;color:black"> This message originated externally, please use caution when clicking on links or opening attachments!</span><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Hello All, I am facing some problems migrating from iptables_hybrid frirewall to openvswitch firewall on centos 7 queens,<u></u><u></u></p>
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<p class="MsoNormal">I am doing this because I want enable security groups logs which require openvswitch firewall.<u></u><u></u></p>
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<p class="MsoNormal">I would like to migrate without restarting my instances.<u></u><u></u></p>
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<p class="MsoNormal">I startded moving all instances from compute node 1.<u></u><u></u></p>
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<p class="MsoNormal">Then I configured openvswitch firewall on compute node 1,<u></u><u></u></p>
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<p class="MsoNormal">Instances migrated from compute node 2 to compute node 1 without problems.<u></u><u></u></p>
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<p class="MsoNormal">Once the compute node 2 was empty, I migrated it to openvswitch.<u></u><u></u></p>
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<p class="MsoNormal">But now instances does not migrate from node 1 to node 2 because it requires the presence of qbr bridge on node 2<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">This happened because migrating instances from node2 with iptables_hybrid to compute node 1 with openvswitch, does not put the tap under br-int as requested by openvswich firewall,
but qbr is still present on compute node 1.<u></u><u></u></p>
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<p class="MsoNormal">Once I enabled openvswitch on compute node 2, migration from compute node 1 fails because it exprects qbr on compute node 2 .<u></u><u></u></p>
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<p class="MsoNormal">So I think I should moving on the fly tap interfaces from qbr to br-int on compute node 1 before migrating to compute node 2 but it is a huge work on a lot of instances.<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Any workaround, please ?<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Ignazio<u></u><u></u></p>
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