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[libvirt-users] Virtio serial exposition
by Jean-Pierre Ribeauville 27 Aug '15

27 Aug '15

Hi, I try to exchange datas between host and Guest by adding these lines in a guest .xml conf file : <channel type='pty'> <target type='virtio' name='arbitrary.virtio.serial.port.name'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> Then /dev/virtio-ports/arbitrary.virtio.serial.port.name is exposed in the guest and a /dev/pts/x is seen as source path on the host. I checked that on two Linux hosts : 1) libvirt-daemon-driver-qemu-1.2.8-16.el7_1.3.x86_64 qemu-kvm-1.5.3-86.el7_1.5.x86_64 qemu-kvm-common-1.5.3-86.el7_1.5.x86_64 qemu-guest-agent-2.1.0-4.el7.x86_64 ipxe-roms-qemu-20130517-6.gitc4bce43.el7.noarch qemu-img-1.5.3-86.el7_1.5.x86_64 Linux sparring 3.10.0-229.el7.x86_64 #1 SMP Thu Jan 29 18:37:38 EST 2015 x86_64 x86_64 x86_64 GNU/Linux 2) qemu-img-0.12.1.2-2.415.el6.x86_64 qemu-kvm-0.12.1.2-2.415.el6.x86_64 gpxe-roms-qemu-0.9.7-6.10.el6.noarch Linux orion 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013 x86_64 x86_64 x86_64 GNU/Linux The device is only exposed on the guest of the first host . Is it due to a too old version of qemu and/or Linux on the second host or some packages missing on this second host ? Thx. Regards, J.P. Ribeauville P: +33.(0).1.47.17.27.87 Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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Re: [libvirt-users] On which /dev/pts/x is channel source
by Jean-Pierre Ribeauville 26 Aug '15

26 Aug '15

Hi, I just tested by using "unix virtio" channel instead of pty. It looks easier to handle. Thx for help. Regards, J.P. -----Message d'origine----- De : libvirt-users-bounces(a)redhat.com [mailto:libvirt-users-bounces@redhat.com] De la part de libvirt-users-request(a)redhat.com Envoyé : mercredi 26 août 2015 15:38 À : libvirt-users(a)redhat.com Objet : libvirt-users Digest, Vol 68, Issue 26 Send libvirt-users mailing list submissions to libvirt-users(a)redhat.com To subscribe or unsubscribe via the World Wide Web, visit https://www.redhat.com/mailman/listinfo/libvirt-users or, via email, send a message with subject or body 'help' to libvirt-users-request(a)redhat.com You can reach the person managing the list at libvirt-users-owner(a)redhat.com When replying, please edit your Subject line so it is more specific than "Re: Contents of libvirt-users digest..." Today's Topics: 1. Isolated networks && test lab (Spanky Horawitz) 2. Re: On which /dev/pts/x is channel source mapped ? (Pierre Schweitzer) 3. Virtio serial exposition (Jean-Pierre Ribeauville) 4. Re: On which /dev/pts/x is channel source mapped ? (Daniel P. Berrange) ---------------------------------------------------------------------- Message: 1 Date: Tue, 25 Aug 2015 17:17:56 -0700 From: Spanky Horawitz <shorawitz(a)gmail.com> To: libvirt-users(a)redhat.com Subject: [libvirt-users] Isolated networks && test lab Message-ID: <1440548276.17239.68.camel@psdchristensen> Content-Type: text/plain; charset="utf-8" I'm trying to migrate my VirtualBox test lab to KVM. In my VB configuration, I have several VM routers with 4 interfaces each. Each router has a bridged interface which connects them all together and to the outside world. I have servers/clients dispersed on each of the other private (Isolated) segments that use the routers as default gateways. In trying to make this work, I used Virtual Machine Manager to define 3x Virtual Networks (Isolated networks) and created a VM router which has 3 interfaces (192.168.x.1) on each Isolated network and a 4th interface using the br0 interface to get to the outside world. The router is able to connect to the outside world. Using Virtual Machine Manager, I also created "client" VM and connected it's single interface to one of the Isolated networks. While testing connectivity of the "client" VM to the router, it seems to go straight to the Host (tested using 'ssh 192.168.x.1'.) I'm trying to isolate the networks from the Host and have the router receive packets for the 192.168.x.1 address on the individual Isolated network segments. Host: br0 (em1): 192.168.1.16 vibr0 (default): 192.168.122.1 virbr1: 192.168.2.1 virbr2: 192.168.3.1 virbr3: 192.168.4.1 VM router: eth0: 192.168.1.10 eth1: 192.168.2.1 eth2: 192.168.3.1 eth3: 192.168.4.1 VM client: eth0: 192.168.3.101 Is there some trick to isolate the Host from the VM's? Is there a comprehensive guide that explains how the networks should be setup (with/without Virtual Machine Manager)? I'm not afraid to get my hands dirty on the console if needed, but GUI's are easier to navigate when you're learning a new technology. I switched to using RemoteBox for managing my VB vm's as it made things a lot easier to deal with than VBoxManage. Thanks for your help!

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[libvirt-users] On which /dev/pts/x is channel source mapped ?
by Jean-Pierre Ribeauville 26 Aug '15

26 Aug '15

Hi, By adding following lines in a Guest .xml conf file , I'm able to send / receive datas between host and this guest. <channel type='pty'> <target type='virtio' name='arbitrary.virtio.serial.port.name'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> My question is the following : How may I find to which /dev/pts/x is mapped the source path ( from the host point of view) ? I was able to find it by having a look in the virt manager GUI , but I want to do it programmatically. I've tried to force it by specifying a source path in the .xml file .... No way Thx for help. Regards, J.P. Ribeauville P: +33.(0).1.47.17.27.87 Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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[libvirt-users] Check whether we are runnig on a KVM guest
by Jean-Pierre Ribeauville 25 Aug '15

25 Aug '15

Hi, How may I , via a C program , check whether I'm running on a KVM guest ? May I use the same API on Windows and Linux Guest ? Regards, J.P. Ribeauville P: +33.(0).1.47.17.27.87 Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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[libvirt-users] from command line to xml file
by Jean-Pierre Ribeauville 25 Aug '15

25 Aug '15

Hi, In order to use a virtio-serial to exchange data between host and its guests, I'd like to modify the .xml Guest conf file by adding these parameters ( as found in the command line) : -device virtio-serial \ -chardev socket,path=/tmp/foo,server,nowait,id=foo \ -device virtserialport,chardev=foo,name=org.fedoraproject.port.0 How should I build the XML tags ? Thx for help. J.P. Ribeauville P: +33.(0).1.47.17.27.87 Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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[libvirt-users] "error: error creating bridge interface virbr0: Operation not supported" occurred what net-start default
by chenhongzhen＠zhicloud.com 25 Aug '15

25 Aug '15

Hi, All! I found a bug! When I start the default network, I got a error shown as below: [root@localhost ~]# virsh net-start default error: Failed to start network default error: error creating bridge interface virbr0: Operation not supported snapshot: 陈鸿圳/chenhongzhen(a)zhicloud.com 13662457180 020-38260999 020-38260988 www.zhicloud.com 广州市天河区黄埔大道西100号富力盈泰广场A座1011

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[libvirt-users] Detaching device behaviour
by Amit Aviram 24 Aug '15

24 Aug '15

Hi all. In libvirt documentation it is written that virDomainDetachDeviceFlags is an asynchronous call: http://libvirt.org/html/libvirt-libvirt-domain.html#virDomainDetachDeviceFl… Does that mean that also virDomainDetachDevice is asynchronous? the reasons mentioned in the above seems relevant for this one as well. Thanks!

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[libvirt-users] Configuration for NATing VMs in a host
by Nacho Otal 24 Aug '15

24 Aug '15

Hi all!, I have a setup in which I want to NAT several Virtual Machines from the host based on ports all of them running CentOS 7.1. The idea is I have several different services running in different VMs and all of them are accessible from the host using different ports that are forwarded to the correct ones in the VMs. I’ve been able to set this up and running configuring the VMs with a virtio network interface and command line redirection on the XML configuration file. However, it is proving to be non stable. Even though VMs are running ok, connection is not possible at some stage until the VM is rebooted and it looks like the port forwarding is not working anymore. I wrote a small script that adds and deletes rules for port forwarding triggered by the qemu hooks and that has brought the needed stability but I’d like to go to a cleaner solution based on firewall-cmd or get rid of it in case it’s possible. On the first draft that I’m using firewall-cmd instead of the iptables rules, it proves to be as unstable as without the qemu hook script. My fear is I’m not configuring libvirt properly. Has anyone experienced such this behaviour and can point me to a better solution?. Thanks for your time, Nacho

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[libvirt-users] Static USB port passthrough is not possible
by Alexander 21 Aug '15

21 Aug '15

Hello, I am currently trying to configure of forwarding devices from specific USB ports which is supported by QEMU. But I don't see any support from libvirt side. Due to libvirt security it occurs to be impossible to passthrough devices from specific bus+port combination. As workaround I may suggest only writing udev rules which use specific script which adds devices to running domains. Unfortunately situation becomes more complicated when I do need to passthrough these devices during system boot -- the special service is required which will handle all these devices after libvirt-guests are up. Does anybody knows how I can do this passthrough without udev workarounds? Thanks. -- Best regards, Alexander Betaev

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[libvirt-users] Windows 10 guest
by Bill Kenworthy 20 Aug '15

20 Aug '15

I am trying to install windows 10 (dreamspark education ISO) into qemu-kvm on Gentoo linux. I got past the cpu problems but am stuck on the image file drivers. The relevant xml is below. It asks for the driver disk which I have, but if I select a driver (either vioscsi or viostor which show as valid it churns away for a few seconds and brings up the cant find driver dialog and cant progress. I've tried both the 102 and 109 RH driver versions (Ive tried most drivers from the ISO's that shows as compatible, usually win8 or 8.1.) Both cdrom xml definitions work fine, but the disk one doesn't and I cant find the magic incantation. <os> <type arch='x86_64' machine='pc-q35-2.4'>hvm</type> </os> <features> <acpi/> <apic/> <hyperv> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> </hyperv> <kvm> <hidden state='on'/> </kvm> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>core2duo</model> <vendor>Intel</vendor> <topology sockets='1' cores='2' threads='2'/> and <devices> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='/mnt/vm/Win10/Win10_disk1.qcow2'/> <target dev='vda' bus='virtio'/> <boot order='2'/> <address type='pci' domain='0x0000' bus='0x02' slot='0x06' function='0x0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/mnt/vm/Win10/en_windows_10_education_x64_dvd_6848120.iso'/> <target dev='hda' bus='ide'/> <readonly/> <boot order='1'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/mnt/vm/Win10/virtio-win-0.1.102.iso'/> <target dev='hdb' bus='ide'/> <readonly/> <boot order='3'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk>

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