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

30 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 30 Aug '11

30 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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[libvirt-users] Help!
by huachao yao 30 Aug '11

30 Aug '11

Buddy, I am a noob in libvirt develop. When I want to create a domain by using virDomainDefineXML and displays a window on the host desktop. But when I add the line " <graphics type='sdl' display=':0.0'/>" into the config xml file, the error as below will happen. libvir: QEMU error : internal error process exited while connecting to monitor: Could not initialize SDL(No available video device) - exiting when I delete " <graphics type='sdl' display=':0.0'/>",I can create the domain normally. Who can help me?! The config xml file is as below: <domain type='qemu'> <name>qemu_ubuntu_01</name> <memory>219200</memory> <currentMemory>219200</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> <boot dev='cdrom'/> </os> <devices> <emulator>/usr/bin/qemu</emulator> <disk type='file' device='cdrom'> <source file='/root/Downloads/ubuntu-11.04-desktop-amd64.iso'/> <target dev='hdc' bus='ide'/> <readonly/> </disk> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/winXP.img'/> <driver name='qemu' type='raw'/> <target dev='hda'/> </disk> <video> <model type='cirrus' vram='9216' heads='1'> <acceleration accel3d='yes'/> </model> </video> <interface type='bridge'> <mac address='52:54:00:d8:65:c9'/> <source bridge='virbr0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='10' listen='127.0.0.1'/> <graphics type='sdl' display=':0.0'/> </devices> </domain>

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[libvirt-users] Xenapi - Domain Console opening & System info
by sharmila radha krishnan 29 Aug '11

29 Aug '11

Hi All,   I would like to know how to open a console of a running domain using libvirt. Looking at the code, seems that there is no support available currently. Any workarounds for this? Also how do I get the System info(Like system tot memory use/Disk info/cpu info,network info etc through libvirt. Are there any palns to support this in the future release?   Also, how to I add a new API to libvirt?   Thanks, Sharmila

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[libvirt-users] Reg: Workaround to use pivot_root while using "rootfs" for "/" ?
by Alphonse Hansel Anthony 26 Aug '11

26 Aug '11

Hi All, I am trying to start a lxc container using libvirt and I am facing an issue due to pivot_root. The return code from the system call “pivot_root” is EINVAL (Invalid arguments). I isolated the issue to this specific condition check within the system call. This is an code snippet from fs/namespace.c::pivot_root * error = -EINVAL; if (root.mnt->mnt_root != root.dentry) goto out2; /* not a mountpoint */ if (root.mnt->mnt_parent == root.mnt) << this represents a circular mount reference goto out2; /* not attached */ if (new.mnt->mnt_root != new.dentry) goto out2; /* not a mountpoint */ if (new.mnt->mnt_parent == new.mnt) goto out2; /* not attached */ * This issue occurs for me, since I am using fstype "rootfs" as "/" and all binaries are mounted ISO's for execution within "/". Based on information from the below links, I have realized, that pivot_root is not possible for the above case.* **https://lkml.org/lkml/2005/10/8/17 https://bugzilla.kernel.org/show_bug.cgi?id=4857 * I would like to know , if my observations are correct and is there any workaround to overcome this issue? Any help in this regard would be useful. -Alphonse

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[libvirt-users] (no subject)
by lingjiao.lc 26 Aug '11

26 Aug '11

Hi, I’ve used the libvirt and sheepdog, they are so great! But I have one question about libvirt and sheepdog. As we know, I can use this command to create a sheepdog image, #qemu-img create –f raw sheepdog:fedora15.img 40G but how can I create a pool and volume for sheepdog with the xml of libvirt ? ________________________________ This email (including any attachments) is confidential and may be legally privileged. If you received this email in error, please delete it immediately and do not copy it or use it for any purpose or disclose its contents to any other person. Thank you. 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。

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