Hello Michal and Ilya Thank you for your answser
You are right With trace I can see is it due to permission. All the commands are send with : sudo What do you mean by " because you're starting OVS manually from a root user, IIUC" Sorry I'm a beginner in Linux For starting, I enter sudo ovs-ctl start To launch VM, : sudo virsh start VM I have create ovs bridge with sudo , also Regards Internal -----Message d'origine----- De : Ilya Maximets <i.maxim...@ovn.org> Envoyé : jeudi 7 septembre 2023 16:49 À : Michal Prívozník <mpriv...@redhat.com>; Laurent Coloby <laurent.col...@se.com>; b...@openvswitch.org Cc : i.maxim...@ovn.org Objet : Re: [ovs-discuss] open vswitch and libvirt [External email: Use caution with links and attachments] ________________________________ On 9/7/23 16:38, Michal Prívozník via discuss wrote: > On 9/6/23 15:26, Laurent Coloby via discuss wrote: >> Hello support >> >> I'm blocked on a basic issue >> >> I use libvirt / KVM with unbutu >> >> >> I just want to launch a virtual Machine with a connection to OVS >> >> With command virsh edit VM , I modify to be conform to your >> recommendation >> https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoc >> s.openvswitch.org%2Fen%2Fstable%2Fhowto%2Flibvirt%2F&data=05%7C01%7Cl >> aurent.coloby%40se.com%7Ca0388c4bc678452caacf08dbafb18316%7C6e51e1adc >> 54b4b39b5980ffe9ae68fef%7C0%7C0%7C638296949974962097%7CUnknown%7CTWFp >> bGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M >> n0%3D%7C2000%7C%7C%7C&sdata=GA3u82MxAGL7AViinZgd4WMbna2f6QK6U%2FVvvAk >> 2wPo%3D&reserved=0 >> >> [cid:image001.png@01D9E0D3.27E6D1E0] >> >> >> And when I start the VM , I have always same issue >> >> [cid:image002.png@01D9E0D6.2AE7D580] > > I'm not sure what this list policy is, but if this were libvir-list > I'd ask you to NOT take a screenshots of a text only to place them > into a text later. +1 Sometimes pictures are also fully stripped from the mail list and so people will not even see what you wanted to show. > >> >> On Internet , I have seen several people with same issue, but not >> fond any explanation >> >> Please could you help me on this problem ? >> Thank you in advance >> > > If you enable libvirt debug logs [1] then you should be able to see > what command is libvirt actually executing to add the TAP device into > the bridge. The code that drives what arguments are passed to > 'ovs-vsctl --may-exist add-port ...' depend on a lot of config knobs > [2]. But in this case it should be fairly trivial command. > > Anyway, if you turn on libvirt debug logs you should be able to see > what command was executed (and perhaps even if it reported any error - > if it did libvirt should have passed on that error message, so maybe > there's an improvement potential on libvirt side too). +1 as well. Please, look at libvirt logs to see what is going on. But if I were guessing, I'd say that you may have an issue with permissions, because you're starting OVS manually from a root user, IIUC. Libvirt daemon likely doesn't have permissions to access sockets created by ovs-vswitchd in this case. > > 1: > https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flibv > irt.org%2Fkbase%2Fdebuglogs.html&data=05%7C01%7Claurent.coloby%40se.co > m%7Ca0388c4bc678452caacf08dbafb18316%7C6e51e1adc54b4b39b5980ffe9ae68fe > f%7C0%7C0%7C638296949974962097%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjA > wMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sd > ata=EIh5OutptVH5558mpNFiOP2qJpBmzfDXHjo9GxqfTx8%3D&reserved=0 > 2: > https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitl > ab.com%2Flibvirt%2Flibvirt%2F-%2Fblob%2Fmaster%2Fsrc%2Futil%2Fvirnetde > vopenvswitch.c%3Fref_type%3Dheads%23L130&data=05%7C01%7Claurent.coloby > %40se.com%7Ca0388c4bc678452caacf08dbafb18316%7C6e51e1adc54b4b39b5980ff > e9ae68fef%7C0%7C0%7C638296949974962097%7CUnknown%7CTWFpbGZsb3d8eyJWIjo > iMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C% > 7C%7C&sdata=izbxWac5SC5p7KTQR6lpGA14M1BJtS0mpo6nXfHXhuI%3D&reserved=0 > > Michal _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
