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[libvirt-users] vlan and libvirt
by Vidon Guillaume 06 Sep '11

06 Sep '11

Hi, I have to deploy some Ubuntu machines via pxe/dhcp/tftp/preseed/puppet on a vlan. the switches are configured to add vlan tag to the traffic to/from those machines. To test new configuration, i tried to configure a domain alike it was connected by a port of a managed switch configured in general mode where untag id is not 1. Anybody have already done this ? Can i use openvswitch to do this ? Thank you GV

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[libvirt-users] RAID1 over IP?
by David Ehle 05 Sep '11

05 Sep '11

I asksed about this in November last year but got on response. Anyone have any ideas now? Does anyone here have any experience with using KVM/libvirt with RAID1 over IP/DRBD or other HA solution? I'm trying to figure out the hardware configuration I would need to be able to survive a failure or planned shutdown of any one unit in a virtualization cluster. KVM/libvirt makes moving running VM's from one host to another a no brainer, but I'm trying to figure out the right way to be able to take a the storage backend for maintenance without disrupting the VMs. Right now I'm thinking something like KVM + libvirt + heartbeat/corosync + pacemaker + DBRM on Ubuntu 10.04 with 3 or 4 nodes - 2 hosts, 2 storage, or 1 host, 1 host + storage, 1 storage. Any thoughts? Thanks!

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[libvirt-users] Char dev error
by Jatin Kumar 04 Sep '11

04 Sep '11

Hello, I have been trying to migrate a guest from one host to another. But it is showing this error: virsh --connect qemu+ssh://root@host1/system migrate --live --undefinesource testvm3 qemu+ssh://root@host2/system tcp://host2:48160 error: operation failed: failed to retrieve chardev info in qemu with 'info chardev' I have tried this command from the host1 also but it shows the same error. Another thing i would like to ask is the that whats the use of migrateuri in migrate command ? -- Jatin Kumar

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[libvirt-users] ssh connection problem
by zahra tavakoli 03 Sep '11

03 Sep '11

Hello, I have a problem in remote connection to libvirt deamon. when I add the ssh connection in virt-manager, this error message appears: server closed connection: Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1022, in _try_open None], flags) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 107, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: server closed connection: Please let me know what the problem is. Thanks.

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[libvirt-users] New with Libvirt and having problems.
by Kevins Thoughts 31 Aug '11

31 Aug '11

Hi all. I've been playing around with KVM for a bit now and have several virtual machines up and running. Having passed what I considered "first look" stage, I'm ready to start using libvirt as a manager. For reference, pre-libvirt, I have started this VM with: /kvm -net nic,model=virtio -net tap,ifname=tap5,script=no -drive file=test1.img,if=virtio,boot=on -curses -no-reboot -m 1g -smp 2/ I have a test environment I like to play with, and created the initial domain XML using virt-install: /virt-install --name "Test" --ram 1024 --vcpus=2 --cpu host --description "Test VM" --import --file test1.img --os-type=linux --os-variant=virtio26 --network bridge=br0,model=virtio --graphics=none --autostart --prompt/ When I look in /var/log/libvirt/qemu/Test.log I see the VM is started with the command (edited down to the relevant parts): //usr/bin/qemu-kvm -S -m 1024 -smp 2 -name Test,process=qemu:Test -nographics -boot c -drive file=/kvms/test1.img,if=none,boot=on /This has two problems: 1) The "-S" is keeping the system from booting 2) the "if=none" needs to be "if=virtio" I've confirmed both by changing -nographics to -curses and watching what happens. For #1, its a big fat nothing (no surprise since -S turns off the CPUs), for #2 grub loads and the kernel boots, but my /dev/vda3 isn't found so "init" can't start. I'm anticipating a 3rd problem: I don't see where to specify that I want the VM to use "tap5" of my bridged network. Can some kind soul please let me know what I need to change in the domain XML file to fix these issues? Thanks, Kevin ps. I've post this to my blog at http://www.kevinsthoughts.com/2011/08/kvm-management-libvirt/ if anyone would prefer to answer there.

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[libvirt-users] conflict disk error
by Paras pradhan 31 Aug '11

31 Aug '11

Hi, In one of my nodes I am getting libvirt error. -- ERROR Unknown failure Traceback (most recent call last): File "/usr/sbin/virt-install", line 895, in ? main() File "/usr/sbin/virt-install", line 677, in main options.sparse, options.nodisks, guest, ishvm, conn) File "/usr/sbin/virt-install", line 239, in get_disks is_file_path), disk, size) File "/usr/sbin/virt-install", line 239, in <lambda> is_file_path), disk, size) File "/usr/sbin/virt-install", line 202, in get_disk d = cli.disk_prompt(None, kwargs) File "/usr/lib/python2.4/site-packages/virtinst/cli.py", line 277, in disk_prompt if dev.is_conflict_disk(conn) is True: File "/usr/lib/python2.4/site-packages/virtinst/VirtualDisk.py", line 890, in is_conflict_disk xml = vm.XMLDesc(0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 247, in XMLDesc if ret is None: raise libvirtError ('virDomainGetXMLDesc() failed', dom=self) libvirtError: Unknown failure -- command used: virt-install --nographics --paravirt --name dora --ram 2048 --file /dora.img --file-size 153 --location nfs://mydom:/distributions/redhat60/x86_64/ -x "ks=http://mydom/ks/redhat60-dora.ks ip=x.x.x.x netmask=255.255.255.0 dns=x.x.x.x gateway=x.x.x.x" -b xenbr0 Ideas? Thanks Paras.

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Re: [libvirt-users] New with Libvirt and having problems.
by Kevins Thoughts 30 Aug '11

30 Aug '11

> > Ah I never gave KVM or virtualization a try in Gentoo. None of my > servers have X though using X11 forwarding still works. In CentOS the > package is xorg-x11-xauth , looks like it may be x11-apps/xauth in > Gentoo. No X anywhere in my environment <smile>. Somehow I normally manage! > > Does "virsh iface-list" show tap5? Actually that command errors out: /virsh # iface-list error: Failed to list active interfaces error: this function is not supported by the connection driver: virConnectNumOfInterfaces/ > > For the disk, this is what I have for my virtio disks... > > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/vmstore/images/domain0001.qcow2'/> > *<target dev='vdb' bus='virtio'/>* > <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > function='0x0'/> > </disk> My XML had the type wrong, setting it to raw. Alas, I still see the invoked KVM being passed: /-drive file=/kvms/test1.img,if=none,id=drive-virtio-disk0,boot=on,format=qcow2 / The "if=none" is the problem, it needs to be "if=virtio". KVM is also still being passed the "-S" flag as its first parameter, so the CPUs are not starting. > > Also maybe add something like this to your virt-install line... > > "--disk path=test1.img,device=disk,bus=virtio" At this point, I'm just editing the XML, its easier. Once I get one working, I can tweak for the others. Virt-install at least got me started. Kevin

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[libvirt-users] Fwd: Re: New with Libvirt and having problems.
by Kevins Thoughts 30 Aug '11

30 Aug '11

On 8/29/2011 10:29 PM, Trey Dockendorf wrote: > Have you looked into using virt-manager? When I started using KVM I > found that new VM provisioning was much simpler with that interface. Alas, Virtmanager doesn't seem to be a supported program under Gentoo - the distribution I use. If its X-based, it wouldn't work anyhow - I'm strictly a command line shop. > > Once you've created your domain with "virt-install" you can make > changes using virsh. > > virsh -c qemu:///system edit Test > > That will allow you to directly edit the domain. > > In the virt-install line you used "bridge=br0" , maybe replace that > with "bridge=tap5". If that doesn't do it, once your editing the XML > you can try something like the following... I'm familiar with virsh edit and have used it to probe around a bit. Actually tried the "bridge=tap5" a few days ago and get the message: /ERROR internal error Failed to add tap interface to bridge. tap5 is not a bridge device/ > > <interface type='bridge'> > <mac address='52:54:00:4d:74:c7'/> > <source bridge='tap5'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> > > That was created using virt-manager, so you probably need to use what > virt-install created for your mac address and address. Gave that a shot, attempting to create a new domain with "br0" replaced by "tap5" and got the same error message: /error: internal error Failed to add tap interface to bridge. tap5 is not a bridge device/ > > Is your init failing on /dev/vda3 and then kernel panic? If so it's > likely your guest OS doesn't have the necessary kernel modules loaded. > Depending on your distro it will vary, but using CentOS 6 I've found > they are automatically loaded. This is what's loaded in CentOS 6 Well, yes and no. Its failing with a kernel panic because KVM is being started with if=none instead of if=virtio. If I manually change it, it works fine. Just need to know where to update that in the domain XML file. For what its worth, the image runs 100% fine with started manually with: /kvm -net nic,model=virtio -net tap,ifname=tap5,script=no -drive file=test1.img,if=virtio,boot=on -curses -no-reboot -m 2g -smp 2/ So I know the image is good. > > # lsmod | grep virtio > virtio_blk 5087 5 > virtio_pci 6733 0 > virtio_ring 7169 2 virtio_blk,virtio_pci > virtio 4824 2 virtio_blk,virtio_pci > > Try changing the disk to ide , and then verifying your system is able > to load the virtio modules. > > Also , once you have your XML the way you like, if your going to stick > with command line look at using virsh though I highly recommend > virt-manager. > > I'm still very new to KVM myself, so hopefully that was of some use > > - Trey Thanks!

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[libvirt-users] VMs do not start randomically during host boot
by Josir Cardoso Gomes 30 Aug '11

30 Aug '11

Hi Folks, Host: Ubuntu 10.04 64bits 3 Guests with Ubuntu 10.04 64bits Every monday, when I turn the host on, some guests starts automatically and others don´t. Every week libvirt "elects" a different guest and don´t start it. If I start it manually, it boot fine. Looking at /var/log/libvirtd, it only show the log of the guests that boot. Not a tip of the sleepy guests servers. Could somebody give me a glue on how to find the problem ? Thanks in advance, Josir.

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[libvirt-users] hello, I 've deployed libvirt, and it is OK to use kvm.But when I use virtualbox, I can not attach a device to a domain
by bin liu 30 Aug '11

30 Aug '11

hello,I 've deployed libvirt, and it is OK to use kvm.But when I use virtualbox,I can not attach a device to a domain. It reports the error that can't get device from device.xml here is my xml file for device(device.xml): <disk type='block'> <driver name='phy'/> <source dev="/home/lb/iscsitest/vdisk.img"/> <target dev='sdb' bus='usb'/> </disk> and the xml file for the vm: <domain type='vbox'> <name>winxp_3D</name> <uuid>d2542bf2-3d56-41fa-a048-4f9a7ed3cf4a</uuid> <memory>787456</memory> <currentMemory>787456</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64'>hvm</type> <boot dev='fd'/> <boot dev='cdrom'/> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>destroy</on_reboot> <on_crash>destroy</on_crash> <devices> <disk type='file' device='disk'> <source file='/root/VirtualBox VMs/winxp_3D/winxp_3D.vdi'/> <target dev='hda' bus='ide'/> </disk> <interface type='bridge'> <mac address='08:00:27:6f:c6:4f'/> <source bridge='tap0'/> <model type='Am79C973'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='desktop' display=':0.0'/> <sound model='ac97'/> <video> <model type='vbox' vram='32768' heads='1'> <acceleration accel3d='yes' accel2d='yes'/> </model> </video> </devices> </domain>

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