- Users - libvirt List Archives

[libvirt-users] Updating Multiple VM Guests?
by Kenneth Stailey 12 Nov '10

12 Nov '10

Hi, The libvirt.org FAQ says that "virsh edit" is the recommended way of updating the libvirt xml. If a change has to be made to many VMs "virsh edit" is tedious, time-consuming and likely to be prone to careless errors. Is there a command line approach to updating multiple VMs? Thanks, Ken

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[libvirt-users] New wiki pages with libvirt SSH setup instructions
by Justin Clift 09 Nov '10

09 Nov '10

Hi all, Just added some new pages to the wiki, this time covering how to configure remote access to libvirt through SSH, not using root: http://wiki.libvirt.org/page/SSHSetup <--- entry page http://wiki.libvirt.org/page/SSHPolicyKitSetup This has details for several different Linux distributions: * RHEL 5 & 6 * Fedora 11-13 * Centos 5 & 6 * Ubuntu 10.04 Server & Desktop * openSUSE 11.2 onwards Does anyone have info they'd like to include for other distributions? :) Regards and best wishes, Justin Clift

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[libvirt-users] Problem booting Microsoft Windows KVM virtual machine
by RaSca 04 Nov '10

04 Nov '10

Hi all, I'm having problems with a vm's startup, I cloned the entire disk of a Windows 2000 with dd on a drbd device, that disk was configured with two partitions. I'm able to see all the partitions contents by using kpartx and mount them: # kpartx -l /dev/drbd0 drbd0p1 : 0 202751488 /dev/drbd0 32 drbd0p2 : 0 285567360 /dev/drbd0 202751520 The problem is that when i try to startup the vm with virsh it hangs on boot by saying "error on operating system load". Here are the details and the vm conf: # cat /etc/libvirt/qemu/vm-sophos.xml <domain type='kvm'> <name>vm-sophos</name> <uuid>213a464c-73ad-8122-3647-7ff6b78d9e07</uuid> <memory>262144</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='i686' machine='pc-0.12'>hvm</type> <boot dev='cdrom'/> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/drbd0'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:15:0d:68'/> <source bridge='br0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain> Note that I've tried to change "source file" parameter with /dev/dm-0p1, /dev/drbd0p1, but virsh don't let me boot the machine saying it is unable to find the disk. The kvm command launched by virsh is this one: /usr/bin/kvm -S -M pc-0.12 -cpu qemu32 -enable-kvm -m 256 -smp 1,sockets=1,cores=1,threads=1 -name vm-sophos -uuid 213a464c-73ad-8122-3647-7ff6b78d9e07 -nodefaults -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/vm-sophos.monitor,server,nowait -mon chardev=monitor,mode=readline -rtc base=utc -boot dc -drive file=/dev/drbd0,if=none,id=drive-ide0-0-0,boot=on,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -device rtl8139,vlan=0,id=net0,mac=52:54:00:15:0d:68,bus=pci.0,addr=0x3 -net tap,fd=44,vlan=0,name=hostnet0 -chardev pty,id=serial0 -device isa-serial,chardev=serial0 -usb -vnc 0.0.0.0:0 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 I'd also followed the steps described here: http://www.brandonturner.net/blog/2010/01/convert-windows-to-xen-guest/ to use fixmbr and the operation succeed, but the error on the vm is still the same. What should else i check? -- Raoul Scarazzini Mia Mamma Usa Linux: Niente è impossibile da capire, se lo spieghi bene! mobile: +393281776712 rasca(a)miamammausalinux.org http://www.miamammausalinux.org

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[libvirt-users] controlling VM access to different tap devices
by Ryan Haggerty 03 Nov '10

03 Nov '10

Sorry if this off-topic but I have a qemu related question I was going to send to the qemu users mailing list but that list appears to have vanished. I thought this community might have some insight. I am interested in controlling VM access to different tap devices so I want to have different qemu processes bound to different tun devices. I've created new tun devices (eg. /dev/net/tun_low) followed by the use of tunctl to create new tap devices based off of the new device nodes (ie tunctl -t tap0 -f /dev/net/tun_low). This also did not seem to work as the VM's seemed to still be accessing /dev/net/tun (running strace on qemu-spice I found it was still doing an open on /dev/net/tun) and not my new device /dev/net/tun_low. Any suggestions on forcing qemu to use alternative tun devices?

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[libvirt-users] controlling VM access to different tap devices
by Ryan Haggerty 02 Nov '10

02 Nov '10

Sorry if this off-topic but I have a qemu related question I was going to send to the qemu users mailing list but that list appears to have vanished. I thought this community might have some insight. I am interested in controlling VM access to different tap devices so I want to have different qemu processes bound to different tun devices. I've created new tun devices (eg. /dev/net/tun_low) followed by the use of tunctl to create new tap devices based off of the new device nodes (ie tunctl -t tap0 -f /dev/net/tun_low). This also did not seem to work as the VM's seemed to still be accessing /dev/net/tun (running strace on qemu-spice I found it was still doing an open on /dev/net/tun) and not my new device /dev/net/tun_low. Any suggestions on forcing qemu to use alternative tun devices?

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[libvirt-users] Does current libvirt ruby support ruby 1.9.2? Or when will it support it?
by 李文兵 02 Nov '10

02 Nov '10

I'm using ruby 1.8.7 and going to port to ruby 1.9. I'd like to confirm whether the libvirt ruby support the latest ruby 1.9. Thanks.

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[libvirt-users] Libvirt and LXC
by Mohd Izhar Firdaus Ismail 02 Nov '10

02 Nov '10

(oops accidentally sent to -owners) Hi, i'm trying to start a LXC guest on a F14 computer .. followed the examples in http://libvirt.org/drvlxc.html, but got stuck when starting it .. 03:07:23.706: debug : virCgroupNew:542 : New group / 03:07:23.707: debug : lxcControllerRun:563 : Setting up private /dev/pts 03:07:23.711: debug : lxcControllerRun:589 : Mouting 'devpts' on /var/lxc/f14/dev/pts 03:07:23.711: debug : lxcControllerRun:604 : Opening tty on private /var/lxc/f14/dev/pts/ptmx 03:07:23.714: debug : lxcContainerAvailable:897 : clone call returned Invalid argument, container support is not enabled 03:07:23.714: debug : lxcContainerStart:848 : Enable network namespaces 03:07:23.718: debug : lxcContainerStart:854 : clone() completed, new container PID is -1 03:07:23.718: error : lxcContainerStart:858 : Failed to run clone container: Invalid argument 03:07:23.718: debug : vethDelete:141 : veth: veth1 03:07:23.718: debug : virRunWithHook:820 : ip link del veth1 LXC config: <domain type='lxc'> <name>f14</name> <uuid>2dcd3cac-47e6-2915-554a-9713edf6ffd1</uuid> <memory>256000</memory> <currentMemory>256000</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/var/lxc/f14'/> <target dir='/'/> </filesystem> <interface type='network'> <mac address='52:54:00:b0:de:18'/> <source network='default'/> </interface> <console type='pty'> <target type='serial' port='0'/> </console> </devices> </domain> I dont know what the invalid arguments are... 03:07:23.718: error : lxcContainerStart:858 : Failed to run clone container: Invalid argument thanks -- Mohd Izhar Firdaus Bin Ismail / KageSenshi Inigo Consulting (FOSS/Plone Development, Training & Services) http://www.inigo-tech.com Fedora Malaysia Contributor & Ambassador http://blog.kagesenshi.org 92C2 B295 B40B B3DC 6866 5011 5BD2 584A 8A5D 7331

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[libvirt-users] SCSI tape drive device
by Tom Stave 01 Nov '10

01 Nov '10

I have a SCSI tape backup unit attached to a kvm host managed by libvirt. Is there a way to expose the SCSI device in libvirt so I could pass the device to a virtual machine and have the virtual machine control the tape backup? Defining the device as a SCSI disk does not appear to work. In this situation, live migration is not an issue. The VM would always be tied to this host.

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[libvirt-users] libvirt problems. Create bridged network via cmdline?
by Денис Барышев 01 Nov '10

01 Nov '10

Hello! I've faced a weird problem. And I totally can't understand how libvirt handles networks. The thing that i need to do is simple. I create a bridge in my ubuntu host, the following config: *iface eth0 inet manual* * * *auto br0* *iface br0 inet dhcp* * bridge_ports eth0* * bridge_stp on* * bridge_maxwait 0* That's OK, and my bridge turns up automatically. But I don't understand why libvirt can't use it, it always want to create bridge on its own. So that when I try to create bridged network with the command: virsh virsh net-create net.xml net.xml contents: * <network>* * <name>virbreth0</name>* * <bridge name='br0' stp='on' delay='0' />* * </network>* I always get error ===> error: Failed to create network from net.xml error: cannot create bridge 'br0': File exists That's pretty obvious that libvirt wants to create bridge on its own. But what should I do in my specific situation. May be there is a workaround. I appreciate any help and ideas... Thanks for your answers. Best regards, Denis Barishev.

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[libvirt-users] qemu sdl parameters via libvirt
by Bruce Hohl 01 Nov '10

01 Nov '10

Hello List, I run a few VMs via libvirt using '--sdl'. I would like to use qemu parameters -no-quit, -no-frame and -ctrl-grab with libvirt. Does libvirt support a way to use these qemu parameters? Does libvirt provide a way to add these options under <graphics/> in the domain.xml using 'virsh edit domain.xml'? My current <graphics/> is as follows: <graphics type='sdl' display=':0' xauth='/home/admin1/.Xauthority'/> I know I could just create a regular kvm start-up script and include these parameters but I would like to manages all VMs via libvirt & virt-manager.

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