Possible to use OVN networking and virtio simultaneously in the same VM?
I wanted to know if it's possible to use OVN networking and virtio simultaneously in the same VM? Or am I wasting my time trying to get it to work? When I try to define a VM and power it on with both types defined, networking fails to work on both. E.g.: <interface type='bridge'> <mac address='xx:xx:xx:xx:xx:xx'/> <source bridge='foo'/> <virtualport type='openvswitch'> </virtualport> <target dev='devfoo'/> </interface> <interface type='bridge'> <mac address='xx:xx:xx:xx:xx:xx'/> <source bridge='bar'/> <virtualport type='openvswitch'> </virtualport> <target dev='devbar'/> </interface> <interface type='bridge'> <mac address='xx:xx:xx:xx:xx:xx/> <source bridge='foo2'/> <model type='virtio'/> <target dev='devfoo2/> </interface> Notice the 'virtio' setting on the third NIC. If I remove that NIC from the xml or if set that NIC as a virtualport on openvswitch like the other two NICs, networking works fine. Am I missing something? Or is this a silly question to even ask?
On Fri, Feb 14, 2020 at 8:05 PM Andre Goree <agoree@staff.atlantic.net> wrote:
I wanted to know if it's possible to use OVN networking and virtio simultaneously in the same VM? Or am I wasting my time trying to get it to work?
In oVirt 4.x I was able to do it and also to intermix normal vnic and OVN based vnic. I needed to reproduced a problem I had in a physical Red Hat Cluster. So i "cloned" the physical nodes to oVirt VMs and the vnic of the intracluster network of this virtual RedHat cluster was put on OVN, while the production vnic was on a normal lan. Both with virtio as the network type and the second with openvswitch virtualport. I just simulate it on a RHV 4.3.7 env and it starts ok the snippet of the dynamic xml definition that RHV creates is this one (note some RHV related parameters not pertinent to your env I think). Note also that on OVN based nics I often put 1442 as the mtu size. <interface type='bridge'> <mac address='00:1a:4a:16:01:1d'/> <source bridge='vlan65'/> <target dev='vnet0'/> <model type='virtio'/> <driver name='vhost' queues='2'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='down'/> <mtu size='1500'/> <alias name='ua-8ccec0e9-c32d-4021-8a06-3d24280536b8'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <interface type='bridge'> <mac address='00:1a:4a:16:01:20'/> <source bridge='br-int'/> <virtualport type='openvswitch'> <parameters interfaceid='9c0927a8-2256-44f3-b089-0e8923055747'/> </virtualport> <target dev='vnet1'/> <model type='virtio'/> <driver name='vhost' queues='2'/> <link state='up'/> <mtu size='1442'/> <alias name='ua-ea95c1fe-b226-4a64-ad30-ee5cb2da08ca'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </interface> On this particular environment RHV provides these packages: ovn2.11-2.11.1-8.el7fdp.x86_64 openvswitch2.11-2.11.0-26.el7fdp.x86_64 libvirt-4.5.0-23.el7_7.3.x86_64 qemu-kvm-rhev-2.12.0-33.el7_7.4.x86_64 Which kind of errors do you get in term of functionality? no connection between two VMs on the same OVN networking subnet? How did you configure OVN? I ask because in oVirt/RHV now you do it from a general setup command and then through web gui admin, not manually Your OS? HIH, Gianluca
From: Gianluca Cecchi <gianluca.cecchi@gmail.com> Which kind of errors do you get in term of functionality? no connection between two VMs on the same OVN networking subnet? How did you configure OVN? I ask because in oVirt/RHV now you do it from a general setup command and then through web gui admin, not manually Your OS? HIH, Gianluca ======= Pardon the formatting (yay OWA). Your notes indeed helped! I was not specifying "<model type='virtio'/>" for my openvswitch vNICs...doing so made everything work as expected! Thanks again :)
participants (2)
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Andre Goree -
Gianluca Cecchi