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[libvirt-users] (no subject)
by Mui Le Van 21 Apr '14

21 Apr '14

Hi, I am using Libvirt with XEN hypervisor to manage the VM. I see there are 3 kinds of Virtual BIOS for XEN Guest VM, they are ROMBIOS,SEABIOS, OVMF ( is disabled by default as XEN Supporters said ). But I don't know how to pass the BIOS options to the Guest from XML file. Could you please suggest how to change the Virtual BIOS for the Guest from XML file in Libvirt or give some clues to do that? Below is the link that I asked XEN support: http://osdir.com/ml/general/2014-04/msg32102.html Thank for your time!

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[libvirt-users] LXC + USB passthrough = Operation not permitted
by Filip Maj 18 Apr '14

18 Apr '14

Hi! First post, kind of a noobie. I've been working with LXC and libvirt for a few months now. Trying to do some interesting things with containers and Android devices :D I'm running ubuntu 13.10 with LXC 1.0.1 and tried both libvirt 1.1.1 and 1.2.2 (backported from ubuntu-trusty), but with either version of libvirt am getting issues as soon as I try to get access to USB devices inside the container. Relevant versions of stuff: $ dpkg -l | grep -i lxc ii liblxc1 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1 i386 Linux Containers userspace tools (library) ii lxc 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1 i386 Linux Containers userspace tools ii lxc-templates 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1 i386 Linux Containers userspace tools (templates) ii python3-lxc 1.0.1-0ubuntu1~ubuntu13.10.1~ppa1 i386 Linux Containers userspace tools (Python 3.x bindings) $ dpkg -l | grep libvirt ii libvirt-bin 1.2.2-0ubuntu12 i386 programs for the libvirt library ii libvirt0 1.2.2-0ubuntu12 i386 library for interfacing with different virtualization systems ii python-libvirt 1.2.2-0ubuntu1 i386 libvirt Python bindings Here's my entire domain definition: <domain type='lxc'> <name>oshi32134</name> <uuid>xxxxx</uuid> <memory unit='KiB'>3145728</memory> <currentMemory unit='KiB'>3145728</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='i686'>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/lib/libvirt/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/some/valid/filesystem/location'/> <target dir='/'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/another/valid/filesystem/location'/> <target dir='/mnt/android'/> </filesystem> <interface type='bridge'> <mac address='xx:xx:xx:xx:xx:xx'/> <source bridge='br1'/> </interface> <console type='pty'> <target type='lxc' port='0'/> </console> <hostdev mode='capabilities' type='misc'> <source> <char>/dev/kvm</char> </source> </hostdev> <hostdev mode='subsystem' type='usb' managed='yes'> <source> <vendor id='0x04e8'/> <product id='0x6860'/> </source> </hostdev> </devices> </domain> Everything worked fine until I added the USB <hostdev> element. I'm essentially trying to get access to a physical Android device connected to the host from inside a container. When I go to start the container, I get an error about Operation not permitted. Here's the relevant bits from /var/log/libvirt/lxc/machine.log: 2014-04-11 22:46:40.491+0000: starting up PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin LIBVIRT_DEBUG=3 LIBVIRT_LOG_OUTPUTS=3:stderr /usr/lib/libvirt/libvirt_lxc --name oshi32134 --console 24 --security=none --handshake 27 --background --veth vnet1 2014-04-11 22:46:40.597+0000: 685: info : libvirt version: 1.2.2 2014-04-11 22:46:40.597+0000: 685: error : virLXCControllerSetupHostdevSubsysUSB:1390 : Unable to create device //var/run/libvirt/lxc/oshi32134.dev/bus/usb//002//003: Operation not permitted Unable to create device //var/run/libvirt/lxc/oshi32134.dev/bus/usb//002//003: Operation not permitted I get the same output above when I use libvirt 1.1.1. Tracing down through the libvirt code it looks like it fails when calling `mknod`. It's clear that libvirt converts the product/vendor ids I specified in the domain definition file to the appropriate USB bus (/dev/bus/usb/002/003, verified by comparing against output of `usb-devices`). In a parallel effort, a colleague of mine set up a vanilla LXContainer on a new install of the same version of ubuntu, and successfully was able to communicate with the Android device from a container. The only configuration tweaks he made was make sure to whitelist the cgroup with the appropriate major/minor device number (associated with the Android device) inside the LXC configuration file. From there the container was able to appropriately create the device file as you attach/detach the Android device. Hopefully someone can shed some light, and appreciate your patience with me as I am learning a lot of this stuff as I go :) Thanks in advance for any help! Fil

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[libvirt-users] virsh blockcommit hangs at 100%
by zyro 18 Apr '14

18 Apr '14

hi, i am trying to blockcommit a external qcow2 snapshot back into its raw backing file like: sudo virsh blockcommit myDomainName vda --wait --verbose the output just shows: Block Commit: [100 %] and stays like that (i waited about an hour or so...). No "Commit complete" message. - explicitly passing --base and/or --top arguments makes no difference. - did not find a related log entry in syslog and consorts env: - ubuntu server 14.04 x64 - libvirt-bin 1.2.2-0ubuntu13 i doubt that it just takes hours to complete after "100%", right? any ideas? kind of a dead-end for me :/ thanks, zyro

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[libvirt-users] virtual subnet
by Lucio Crusca 18 Apr '14

18 Apr '14

Hello all, I need to setup a virtual subnet to create a test AD domain (server + clients): guests need to talk to each other, they need to reach the internet through a virtual router with nat (virbr0?), broadcasts must not reach the host nor the physical network (because of conflicts with the existing real AD domain) and libvirt must NOT offer a dhcp service inside the virtual subnet. What kind of networking model should I look at?

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[libvirt-users] What's the meaning of sub-element <ip address='X.X.X.X'> in <interface type='bridge'> of domain xml?
by Jianwei Hu 18 Apr '14

18 Apr '14

Hi guys, I saw this sub-element in http://libvirt.org/firewall.html, there is some confusion, what's the meaning of sub-element <ip address='X.X.X.X'> in <interface type='bridge'> of domain xml? The detail <interface> in domain xml as below: <interface type='bridge'> <mac address='52:54:00:56:44:32'/> <source bridge='br1'/> <ip address='10.X.X.X'/> <===it's my question <target dev='vnet0'/> <model type='virtio'/> <filterref filter='clean-traffic'/> </interface> Is it static IP(specified by customer) in guest OS? or a IP of interface(e.g. eno1) in "br1" on host machine? what's definition about it? [root@localhost src]# brctl show bridge name bridge id STP enabled interfaces br1 8000.24be051881ce no eno1 If you know how to use it, please show me a detail scenario. Thanks, Jianwei

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[libvirt-users] KVM guests unusable after install
by Jay Vyas 17 Apr '14

17 Apr '14

I'm finding that my KVM images are not bootable after i reboot my host, and i've detailed my problem here.... http://serverfault.com/questions/589806/kvm-machines-unbootable-after-host-… Any thoughts on why? Here is a repaste of the problem: **************************************************************************************** Im finding that my KVM guests are unusable after i reboot my host. Specifically, I always get this error: Booting from hard disk Boot failed: not a bootable disk What causes this error? I've tried toggling the VM disk type between qcow2 and raw, because a few articles online mentioned that this can happen if virt doesnt know the type of image to load, but that did not help. ** some more details ** I create My VMs from source using a command somewhat like this: base="http://mirror.pnl.gov/fedora/linux/releases/20/Fedora/x86_64/os/" nohup sudo virt-install --hvm --name $vm_name$i --ram 4000 \ --disk path=/VirtualMachines/$vm_name$i,size=30 \ --location $base -x "ks=http://xxx.os21.ks$kx"& My virsh file looks like this: 1 <domain type='kvm'> 2 <name>testFriApr11092714EDT2014_1</name> 3 <uuid>d4c86892-fb15-04ed-f4ab-7e3c76974ffc</uuid> 4 <memory unit='KiB'>4096000</memory> 5 <currentMemory unit='KiB'>4096000</currentMemory> 6 <vcpu placement='static'>1</vcpu> 7 <os> 8 <type arch='x86_64' machine='rhel6.4.0'>hvm</type> 9 <boot dev='hd'/> 10 </os> 11 <features> 12 <acpi/> 13 <apic/> 14 <pae/> 15 </features> 16 <clock offset='utc'/> 17 <on_poweroff>destroy</on_poweroff> 18 <on_reboot>restart</on_reboot> 19 <on_crash>restart</on_crash> 20 <devices> 21 <emulator>/usr/libexec/qemu-kvm</emulator> 22 <disk type='file' device='disk'> 23 <driver name='qemu' type='raw' cache='none'/> 24 <source file='/VirtualMachines/testFriApr11092714EDT2014_1'/> 25 <target dev='hda' bus='ide'/> 26 <address type='drive' controller='0' bus='0' target='0' unit='0'/> 27 </disk> 28 <controller type='usb' index='0'> 29 <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> 30 </controller> 31 <controller type='ide' index='0'> 32 <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> 33 </controller> 34 <interface type='network'> -- Jay Vyas http://jayunit100.blogspot.com

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[libvirt-users] "failed to send audit message operation not permitted"
by Pasquale Dir 17 Apr '14

17 Apr '14

Hello, I have a remote ubuntu server on which I have a kvm hypervisor installed. Now, on my ubuntu desktop, I create a new connection with virt-manager and start a remote guest. The guest successfully starts, however I can't see it in the console and, on client side, I get that remote user closed it. Looking at the /var/log/libvirtd on the server side I get that error: "failed to send audit message operation not permitted" I tried to call "virsh console myDomain" on the remote server and what I get is that the console freezes. The log is always the same, operation not permitted. Here's the complete one: 2014-04-17 18:26:26.532+0000: 2985: warning : virAuditSend:135 : Failed to send audit message virt=kvm op=stop reason=destroyed vm="dhcpVPN" uuid=929bac48-b87c-9f6f-156a-5c066bf36085 vm-pid=-1: Operation not permitted Where the problem could be? Pasquale

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[libvirt-users] libvirt with glusterfs problem
by lyz_pro 17 Apr '14

17 Apr '14

Hi I have two node: hcg3, hcg4 which run glusterfs Also run libvirtd on each node. The problem cames when I use `virsh attach-device` to attach a glusterfs type disk . My device xml like: <disk type="network" device="disk"> <driver name="qemu" type="raw" cache="none"/> <source protocol="gluster" name="h2312v3/volume-257e07bd-9e80-4d06-8d6d-5f83979de1fd"> <host name="hcg4"/> </source> <target bus="virtio" dev="vdb"/> <serial>257e07bd-9e80-4d06-8d6d-5f83979de1fd</serial> </disk> when I attach a gluster disk to a domain running on hcg4. the above xml work great. BUT when I try to change the tag `host` name attribute to hcg3, the attach action will fail with output: error: Requested operation is not valid: domain is not running Also: I can use `qemu-kvm` command to start vm successful with gluster://hcg3 or gluster://hcg4. I have stop both nodes' iptables. and my libvirt and qemu version is : Compiled against library: libvirt 1.1.4 Using library: libvirt 1.1.4 Using API: QEMU 1.1.4 Running hypervisor: QEMU 1.6.2 glusterfs-3.4.1-3.el6.x86_64 -------------- lyz_pro 2014-04-11

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[libvirt-users] Snapshots
by lukass.vacek＠seznam.cz 17 Apr '14

17 Apr '14

Hello, I would like to ask what I am doing wrong and what is the best approach to resolve this situation: First of all I start virtual machine by virDomainCreateXML. In my application I use libvncclient library that sends mouse events to this running domain. I had some troubles with coordinates of mouse cursor but all problem was solved when I added <input type='tablet' bus='usb'/> to xml configuration. So now I have a running domain and I want to create snapshot and then after some operations I want to restore this snapshot. I use virDomainSave and virDomainRestore that work fine. The only problem is, that after creating and restoring snapshot I have the same problem with coordinates of mouse. I need to create and restore snapshot also with <input type='tablet' bus= 'usb'/> somewhere specified. I also tried methods virDomainSaveFlags with xml configuration string(see below) as parameter *dxml, but method fails with: libvir: Domain Config error : XML error: domainsnapshot.Unable to create snapshot. What should I add to xml configuration? I look at http://libvirt.org/ formatsnapshot.html on example but I dont know what paths I should use in my program. I dont understand much snapshots and similar stuff so could you give me example how could I edit my xml configuration? Or what I should do to make virDomainSave and virDomainRestore work? xml configuration: <domain type='kvm'> <name>Name</name> <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1810</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <devices> <input type='tablet' bus='usb'/> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <source file='/home/lukas/Desktop/Image.img'/> <target dev='hda'/> </disk> <interface type='network'> <source network='default'/> </interface> <graphics type='vnc' port='5901'> <listen type='address' address='127.0.0.1'/> </graphics> </devices> </domain>

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Re: [libvirt-users] [virt-tools-list] live-migrating a VM whose current host's storage is fubar'ed
by Cole Robinson 16 Apr '14

16 Apr '14

On 04/15/2014 05:16 PM, Digimer wrote: > Hi all, > > For those on the linux-cluster list, this is a similar question to my > post[1] there. > > I recently had a client destroy their node's RAID array (they yanked hard > drives until the array was destroyed). The VMs running on the node continued > to operate for another hour, impressively. Their storage was based on DRBD, so > the VM's storage just started going to/from the other node's storage. > > The problem was when I tried to migrate them off of the damaged node to a > healthy node. Without being able to write to the logs (I assume), the > migration failed. In the end, I had to force-off the damaged host and reboot > the VMs on the backup node. This caused an outage which, I think, could have > been avoided. > > So my question is; Can VMs be migrated if/when the host's FS is > read-only/destroyed? If so, how? > > Thanks! > > 1. https://www.redhat.com/archives/linux-cluster/2014-April/msg00010.html > Probably a better question for libvirt lists, CCd, but I don't think anyone tests a scenario like that so there's bound to be problems. - Cole

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