July 2014 - Users - libvirt List Archives

[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 22 Nov '14

22 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] XP and virtio
by Mauricio Tavares 01 Aug '14

01 Aug '14

So I need to create a XP vm. I am using lvm logical volumes for its disk, so I am using virtio. I got the iso in http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/bin/images/, but how do I feed it to the XP install? I did try to mount it as a floppy and it hung there on "please wait"; I guess that means it did not like a 70MB iso as its floppy. But it also does not seem to want to look for the drivers if I mount the .iso as a CD. What else can I try?

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[libvirt-users] multicast traffic no longer working after reboot
by Dennis Jacobfeuerborn 01 Aug '14

01 Aug '14

Hi, today a couple of Hypervisors got restarted due to a power outage. While the systems and the VMs on the are running fine multicast traffic between the guests is no longer working. I generate multicast udp packet using iperf in the guest and check on the host using tcpdump: tcpdump vnet0 => multicast packets are visible tcpdump vlanbr8 => multicast packets are visible tcpdump em1.8 => no multicast packets visible vlanbr8 is the bridge, vnet0 the interface of the guest and em1.8 the physical interface for vlan 8. I compared the settings in /sys/class/net/vlanbr8/bridge/multicast_* with a system where multicast works fine and see no differences. brctl showstp also shows "mc router" to be 1 for both interfaces and the bridge. All settings in /proc/sys/net/bridge/* are 0. Any ideas why the bridge doesn't seem to forward multicast packets? iperf with unicast udp also works fine so it's just multicast that is the problem. Regards, Dennis

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[libvirt-users] problem when using qemu 2.0.0 + libvirt 1.2.6
by weiwei li 31 Jul '14

31 Jul '14

Hi I got a problem when using qemu 2.0.0 + libvirt 1.2.6 . It just can not define a kvm vm successfully , errors like this : # virsh define 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: Failed to define domain from 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: unknown OS type hvm After several tries, i found that Qemu2.0 /qemu-kvm1.2+ libvirt1.0.2 and lower version is ok Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and higher version is failed I have checked system as bellows: 1 kvm,kvm_intel modules are loaded(centos 6.2 /kernel 2.6.32) 2 bios is ok for hvm 3 qemu is installed and emulator path in xml config file is correct 4 I also tried to install glusterfs-devel-3.2.7-1.el6.x86_64 and rebuild qemu , no use. 5 virsh capabilities can not get guest capabilities in the failure scenario so ,why Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and above version could not work? thanks, weiwei

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[libvirt-users] missing libvirt-sock and libvirt-bin after compile libvirt 1.2.6
by Yuanzhen Gu 31 Jul '14

31 Jul '14

Good morning there, I compiled and installed libvirt latest version 1.2.6, previously I have apt-get install libvirt-bin, which should be virsh --version: 0.9.8. after apt-get purge libvirt-bin, I compile the libvirt 1.2.6 and installed it, when configure, I did: ./configure --prefix=/usr --localstatedir=/var --sysconfdir=/etc --with-esx=yes I have compiled qemu and installed too, and make a symbolic link to /usr/bin/qemu-system-x86_64 but my question is even I launch a vm in qemu, $virsh list showed nothing, further more, 1) if I use virtual machine manager, it get connection failiure, due to socket to '/var/run/libvirt/libvirt-sock'; No such file of dirctory. 2). there is missing libvirt-bin under /etc/init.d/, after compile and installed libvirt 1.2.6 3). I tried to start libvirtd daemon, sudo /usr/sbin/libvirtd/start shows "/usr/sbin/libvirtd: unexpected, non-option, command line arguments" 4). I've checked /var/log/libvirt/libvirtd.log which shows cannot find suitable emulator for x86_64 I've stuck here for whole afternoon yesterday, any help or suggestion is highly appreciated !! thanks a lot in advance ! Best, Yuanzhen Best, Yuanzhen Best, Yuanzhen

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[libvirt-users] VM not booting with physical hardware attached
by Pierre Schweitzer 30 Jul '14

30 Jul '14

Dear all, I'm looking for a bit of help with a problematic VM. We have an hypervisor which has 4 eth ports. 3 are already used, and I wanted to pass the 4th one directly to a VM (which is fully working without it). So, I modified the XML accordingly (which matches our hardware), adding: <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x03' slot='0x00' function='0x3'/> </source> </hostdev> I also activated Intel IOMMU in Linux (and rebooted). Then, I issued a virsh start <domain>. libvirt is able to fire the VM, but then the OS inside doesn't boot at all. I tried to go deeper into debugging and it seems that the VM cannot pass SeaBIOS anymore. It gets stuck in seabios, it seems. No "Booting" sentence displayed, only version of SeaBIOS, when I watch VNC ouput. I tried to use <bios useserial='yes'/> with a console to the VM. Nothing is displayed on the console. Here are the specs of the machine: -> Ubuntu 12.04LTS up to date -> libvirt 0.9.8-2ubuntu17.19 -> kvm 1.0+noroms-0ubuntu14.15 -> seabios 0.6.2-0ubuntu2.1 The ethernet card I try to attach is: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe Its PCI ID being: 14e4:1657 What are the possibilities to debug this issue? What are the possibilities to fix it as well? Thanks to everyone helping! With my best regards, -- Pierre Schweitzer <pierre(a)reactos.org> System & Network Administrator Senior Kernel Developer ReactOS Deutschland e.V.

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[libvirt-users] lxc arp doesn't work at start for several seconds
by Jonathan Rudenberg 30 Jul '14

30 Jul '14

I’m running into an issue with libvirt-lxc networking. I have an init program that configures the eth0 interface with an IP and gateway when the container starts. I noticed that programs running in the container encountered “no route to host” errors and looked into it further. What I found is that ARP packets are not making it onto the gateway during the first few seconds of the container’s life. I have created a repro case that demonstrates this issue: https://github.com/titanous/libvirt-arp-bug All it does is configure eth0 and then ARPs the bridge IP. There are no ARP responses for ~4s and then everything starts working. The linked repo also contains pcap files from the veth and the bridge showing that the ARP packets are sent over the veth but don’t show up on the bridge. I’ve tested and run into this issue 100% of the time on Ubuntu 14.04 with libvirt 1.2.2 and Linux 3.13.0-32 as well as Fedora 20 with libvirt 1.1.3.5 and Linux 3.15.6-200. Any help would be appreciated, and I’m happy to provide more details if they would be useful. Thanks, Jonathan

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[libvirt-users] Running domain-update memory not working
by usha basavaraju 29 Jul '14

29 Jul '14

>>> vm=co.lookupByName('test1') >>> vm.info() [1, 524288L, 524288L, 1, 20400000000L] >>> vm.setMemoryFlags(509952,1) # Live memory 0 >>> vm.info() [1, 524288L, 524288L, 1, 21430000000L] >>> vm.setMemoryFlags(509952,0) --- ## current memory 0 >>> vm.info() [1, 524288L, 524288L, 1, 21430000000L] >>> vm.XMLDesc() Not updating .. but api call not throwing any error.. What is the correct procedure for updating

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[libvirt-users] [libivrt-user]problem when using qemu 2.0.0 + libvirt 1.2.6
by weiwei li 29 Jul '14

29 Jul '14

Hi I got a problem when using qemu 2.0.0 + libvirt 1.2.6 . It just can not define a kvm vm successfully , errors like this : # virsh define 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: Failed to define domain from 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: unknown OS type hvm after several tries, i found that Qemu2.0 /qemu-kvm1.2+ libvirt1.0.2 and lower version is ok Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and higher version is failed I have checked system as bellows: 1 kvm,kvm_intel modules are loaded(centos 6.2 /kernel 2.6.32) 2 bios is ok for hvm 3 qemu is installed and emulator path in xml config file is correct 4 I also tried to install glusterfs-devel-3.2.7-1.el6.x86_64 and rebuild qemu , no use. so ,why Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and above version could not work? thanks, vary much liweiwei

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[libvirt-users] redirecting guest stdio to the host
by Alexander Binun 27 Jul '14

27 Jul '14

Dear Friends, I would ask you a question ; grateful in advance! I have a program running on a VM guest. Its output is valuable (for VM introspection) so I want to let the host module know about it. I prefer to redirect ' stdio" of a guest into a device at the host (a text file or my device that has the name "mydev" and the driver is written for it). I have the XML definition file for my VM in /etc/libvirt/qemu. I have added the section: <serial type="file"> <source path="/var/log/vm/vml.log"/> <target port="0"/> </serial> into the /devices section. That is I want the stdio to be streamed into the file /var/log/vm/vml.log at the host. Then I run simple textual commands at the guest (ls, pwd and so on). But I do not see /var/log/vm/vml.log created at the host. Please help me. Thanks in advance, Alexander Binun > > The command string for qemu will look like qemu -serial /dev/mydev ... But I would like to > modify the libvirt definition XML file (in /etc/libvirt/qemu). Stefan notes in his blog > (http://blog.vmsplice.net/2011/04/how-to-pass-qemu-command-line-options.html) that the options will > look like: ---------- Forwarded message ---------- Date: Wed, 28 May 2014 18:06:10 +0300 From: Eric Blake <eblake(a)redhat.com> To: Alexander Binun <binun(a)cs.bgu.ac.il> Cc: Stefan Hajnoczi <stefanha(a)gmail.com> yagel(a)cs.bgu.ac.il kahilm(a)post.bgu.ac.il qemu-devel(a)nongnu.org boaz.menuhin(a)gmail.com Paolo Bonzini <pbonzini(a)redhat.com> markbl(a)post.bgu.ac.il Subject: Re: excuse me for incorrect question... On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt-users] Problem about Disk Dize of Destination and Source File after Do Blockcopy
by shyu 27 Jul '14

27 Jul '14

Hi There, There is a case I met about the destination file's disk size after do blockcopy Details as below: Env: # rpm -q libvirt qemu-kvm-rhev libvirt-1.1.1-29.el7.x86_64 qemu-kvm-rhev-1.5.3-60.el7ev_0.2.x86_64 1. Check source file # qemu-img info /var/lib/libvirt/images/rhel6.img image: /var/lib/libvirt/images/rhel6.img file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 1.2G cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # ll -lash /var/lib/libvirt/images/rhel6.img 1.2G -rw-r--r--. 1 qemu qemu 1.2G Jul 22 11:04 /var/lib/libvirt/images/rhel6.img Here: Disk Size is "1.2G" 2. Do blockcopy # virsh domblklist rhel6 Target Source ------------------------------------------------ vda /var/lib/libvirt/images/rhel6.img # time virsh blockcopy rhel6 vda /var/lib/libvirt/images/copy.img --wait --verbose Block Copy: [100 %] Now in mirroring phase real 0m21.285s user 0m0.038s sys 0m0.018s 3. Check destination file's disk size # qemu-img info /var/lib/libvirt/images/copy.img image: /var/lib/libvirt/images/copy.img file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 2.0G cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # ll -lash /var/lib/libvirt/images/copy.img 2.1G -rw-------. 1 qemu qemu 1.2G Jul 22 11:10 /var/lib/libvirt/images/copy.img Here: Disk Size is "2.0G" So my question is why the "disk size" is different between source file and destination file ? (Actually, the destination always change after I try many times, sometime it is same size as source, sometimes it is lager than source.) 4. Do --pivot After --pivot, the disk size is same size as after blockcopy -- Regards shyu

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[libvirt-users] Migration b/w nodes with identical cpu featureset failing
by Andrey Korolyov 27 Jul '14

27 Jul '14

Hello, on libvirt 1.2.4 and two nodes with E5-2620 and E5-2650, I am not able to migrate vm with cpu=host-passthrough with error: internal error: can't get vmdef the only difference between sender and receiver` cpus is the frequency and identification string. Is this behaviour expected?

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[libvirt-users] vhost-net requested but could not be initialized
by Asadullah Hussain 25 Jul '14

25 Jul '14

I am using a custom qemu to launch a vhost enabled VM. The qemu doesn't use the default "/dev/vhost-net" directory as character device. Due to this I am getting the error: qemu-system-x86_64: -netdev type=tap,id=net1,script=no,downscript=no,ifname=port3,vhost=on: vhost-net requested but could not be initialized Is there a way to tell libvirt to avoid using the default /dev/vhost-net file? I have tried using the pass-through arguments but libvirt still processes the command and throws the error. PS: I can successfully create a vhost VM using qemu command-line, so this is a libvirt issue. -- Cheers, Asadullah Hussain

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[libvirt-users] how to read the libvirt log file
by Yuanzhen Gu 24 Jul '14

24 Jul '14

Hi folks, I need to trace how libvirt talk with qemu monitor, log everything when give command, but does anyone know what the format, and how to read the log file? for example: 2014-07-22 17:25:22.984+0000: 18571: debug : qemuMonitorIOProcess:356 : QEMU_MONITOR_IO_PROCESS: mon=0x7f733c000a40 buf={"timestamp": {"seconds": 1406049922, "microseconds": 983916}, "event": "STOP"} where to find the qemuMonitorIOProcess function, and what :356 means? Thanks very much! Best, Yuanzhen

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Re: [libvirt-users] i686 guest failing to start at 50a2c45 (and earlier versions of 2.1-rc) with pc-i440fx-2.1
by Andrey Korolyov 19 Jul '14

19 Jul '14

On Fri, Jul 18, 2014 at 11:58 PM, Andrey Korolyov <andrey(a)xdel.ru> wrote: > Hello, > > 2.0 model works fine > > 2.1 crashes with following: > > /tmp/buildd/qemu-2.0.92+rev1/hw/i386/smbios.c:825: smbios_get_tables: > Assertion `smbios_smp_sockets >= 1' failed > > Not sure if bisect will help much, but the commit which introduced > this platform works well (3458b2b0). > > arg set follows: > > /usr/bin/kvm -name vm28456 -S -machine pc-i440fx-2.1,accel=kvm,usb=off > -cpu qemu32 -m 256 -realtime mlock=off -smp > 1,sockets=1,cores=12,threads=12 -numa node,nodeid=0,cpus=0,mem=256 > -uuid 46623576-d00b-42b4-b1cc-c5c780a8b5b3 -nographic -no-user-config > -nodefaults -chardev > socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm28456.monitor,server,nowait > -mon chardev=charmonitor,id=monitor,mode=control -rtc > base=utc,clock=vm,driftfix=slew -global > kvm-pit.lost_tick_policy=discard -no-shutdown -boot strict=on -device > piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device > virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive > file=rbd:dev-rack2/vm28456-YoP:id=qemukvm:key=XXXXXX:auth_supported=cephx\;none:mon_host=10.6.0.1\:6789\;10.6.0.3\:6789\;10.6.0.4\:6789,if=none,id=drive-virtio-disk0,format=raw,cache=writeback > -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 > -netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device > virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:10:03:a8,bus=pci.0,addr=0x3 > -netdev tap,fd=25,id=hostnet1,vhost=on,vhostfd=26 -device > virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:10:03:a9,bus=pci.0,addr=0x4 > -chardev pty,id=charserial0 -device > isa-serial,chardev=charserial0,id=serial0 -chardev > socket,id=charchannel0,path=/var/lib/libvirt/qemu/vm28456.sock,server,nowait > -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.1 Nevermind, that was a result from wrong config generation (1 vcpu and 12 topology cores in the config, probably libvirt folks may be interested for checking this because libvirt allows such configuration for now).

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[libvirt-users] starting lxcs from within a vm using libvirt
by Robb Walker 16 Jul '14

16 Jul '14

my goal for testing/simulations is to be able to run a vm on my desktop and within that vm run linux containers currently I can start an ubuntu trusty vm using libvirt as my broker to qemu or qemu-system-x86_64 directly and start a saucy-based lxc using lxc-tools. I invoke lxc-start -n name -f configfile and within a few seconds I'm logged into my saucy based lxc. I can't start the lxc thru libvirt i.e. virsh -c lxc:/// start domain Again, if I try to use libvirt to "install" and start the lxc from within the vm, no joy. Results below: >>> root@vullbvrt69:~# virt-install --connect lxc:/// -n vulslxc01 -r 512 --filesystem /qemu_lxc/ss_140521/,/ --serial pty --serial pty Starting install... Creating domain... | 0 B 00:00 error: failed to get domain '22542' error: Domain not found: No domain with matching name '22542' Domain creation completed. You can restart your domain by running: root@vullbvrt69:~# virsh -c lxc:/// list --all Id Name State ---------------------------------------------------- - vulslxc01 shut off root@vullbvrt69:~# virsh -c lxc:/// start vulslxc01 Domain vulslxc01 started root@vullbvrt69:~# virsh -c lxc:/// console vulslxc01 --devname serial1 error: The domain is not running root@vullbvrt69:~# virsh -c lxc:/// list --all Id Name State ---------------------------------------------------- - vulslxc01 shut off >>> My physical desktop is running precise 12.04.4 ----qemu-kvm 1.0+noroms-0ubuntu14.15 ----libvirt-bin 0.9.8-2ubuntu17.19 ----lxc 0.7.5-3ubuntu69 This physical machine launches the trusty vm from which in turn I'm trying to run lxcs via libvirt Trusty vm ----libvirt-bin 1.2.2-0ubuntu13.1.1 ----lxc 1.0.4-0ubuntu0.1 The saucy lxc was not created using lxc templates just a normal minbase debootstrap. I have run virt-install with -d. Nothing obvious jumps out except the above Domain not found virsh -c lxc:/// -d4 -l debug.out start domain_name dumps nothing into debug.out thx in advance for any and all help and apolgies in advance if I've dropped critical info to help sort this out This e-mail and any attachments may contain information that is confidential and proprietary and otherwise protected from disclosure. If you are not the intended recipient of this e-mail, do not read, duplicate or redistribute it by any means. Please immediately delete it and any attachments and notify the sender that you have received it in error. Unintended recipients are prohibited from taking action on the basis of information in this e-mail or any attachments. The DRW Companies make no representations that this e-mail or any attachments are free of computer viruses or other defects.

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Re: [libvirt-users] LVM Volume Creation
by Ravi Samji 15 Jul '14

15 Jul '14

Hi All, I'm having issue with creating LVM Volume via libvirt. We are running libvirtd 1.2 with KVM. We are creating Volume Group (VG01) outside of libvirt and defining a storage pool for it. Here is the StoragePool XML for the Volume Group created outside libvirt. <pool type="logical"> <name>VG01</name> <target> <path>/dev/VG01</path> </target> </pool> We are creating Logical Volume (ub_test01.img) through libvirt in the Volume Group (VG01) Here is the XML to create Storage Volume in LVM Storage Pool VG01. <volume type="block"> <name>ub_test01.img</name> <allocation>0</allocation> <capacity unit="M">1</capacity> <target> <format type="lvm2" /> </target> </volume> When I create the Logical Volume from libvirt using above XML and run lvs command to list logical volumes, this is what I see. LV VG Attr LSize Origin Snap% Move Log Copy% Convert --------------- ------- ------- ------- ----------------------- ------- ------- ------- ------- ------- foo VG01 -wi-a- 1.00g ub_test01.img VG01 swi-a- 4.00m [ub_test01.img_vorigin] 0.20 root ops-02 -wi-ao 227.08g swap_1 ops-02 -wi-ao 5.75g As you see, ub_test01.img shows that it has an Origin indicating that it was created as a snapshot, but, that Origin doesn't exist and wasn't specified. I'd appreciate if you anyone can help me understand what is going on and/or describe how to make libvirt create logical volumes not as a snapshot. I'm happy to enable debugging to see what command libvirt is running to create the volume if someone case describe how to enable debugging. Regards, Ravi Message sent via Atmail Open - http://atmail.org/

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[libvirt-users] LVM Volume Creation
by Ravi Samji 15 Jul '14

15 Jul '14

Hi All, I'm having issue with creating LVM volume via libvirt. XML of LVM StoragePool is: VG01 /dev/VG01 (existing vg) XML of create volume in lvm pool is: ub_test01.img 0 1 When I create the volume with above XML defn, lvs command to list logical volume shows a value in the origin column indicating it was created as snapshot.. the strange thing is that the origin volume does not exist..! something strange going on. You can see the lvs output here See http://pastebin.com/prk6VqwD [1] I'd appreciate if you anyone can help me understand what is going on and/or describe how to make libvirt create logical volumes not as a snapshot. We are running libvirtd 1.2 with KVM. Regards, Ravi ------------------------- Message sent via Atmail Open - http://atmail.org/ Links: ------ [1] http://pastebin.com/prk6VqwD

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[libvirt-users] Changing the default qemu path in libvirt
by satheesh 14 Jul '14

14 Jul '14

Hi All, I would like to change the default qemu path in libvirt xml and the changed path has to be used while installing VMs using virt-install. There was a similar question rasied some years back, I could not find the answer to the same. http://www.redhat.com/archives/libvir-list/2011-December/msg01100.html Is that possible right now?, If we have the support already, please point to the same. Thanks in advance. Regards, -Satheesh.

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[libvirt-users] configuring a lxc guest to run 32bits from a 64bits host under libvirt-lxc
by Thierry Parmentelat 14 Jul '14

14 Jul '14

Hi there I have a couple of newbie questions concerning running a 32bits guest in a 64bits host using libvirt - lxc; I’m running libvirt-1.2.5 on fedora18 and fedora20 (a) is this supported at all, and (b) if so how do I configure this for a given guest ? guessing from the mere existence of http://www.redhat.com/archives/libvir-list/2011-February/msg01040.html I would think the answer to (a) is yes; anybody cares to confirm ? As far as (b), I would expect some flag could be set in the XML description of my guest so that libvirt can perform the proper syscall to personality() at the right point in the process hierarchy.. However I have not been able to spot this in the documentation so far, but OTOH the page on the XML configuration here http://libvirt.org/format.html appears to be empty so this might be a temporary hiccup ? in any case, any hint or insight on this matter would be much appreciated — Thierry

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[libvirt-users] libvirt build issue - make check fails , file name long
by Raj Ravi 12 Jul '14

12 Jul '14

Hi, I was trying to build libvirt-0.10.2-29. Now, it builds fine in simple directory setting: like /home/itsme/test/libvirt/ But, if the directory setting is long: like /home/public/test/abc-v1/liibvrt-v1-v2/ = > it fails. Reason for failure is :qemumonitorjsontest I tried running the specific test case like : VIR_TEST_VERBOSE=1 ./qemumonitorjsontest ======================== 1) GetStatus ... libvir: XML-RPC error : Path /home/public/abc_v1_v2/libvirt_0.10.2_29/BUILD/libvirt-0.10.2/tests/qemumonitorjsontest.sock too long for unix socket: File name too long FAILED 2) GetVersion ... libvir: XML-RPC error : Path /home/public/abc_v1_v2/libvirt_0.10.2_29/BUILD/libvirt-0.10.2/tests/qemumonitorjsontest.sock too long for unix socket: File name too long FAILED 3) GetMachines ... libvir: XML-RPC error : Path /home/public/abc_v1_v2/libvirt_0.10.2_29/BUILD/libvirt-0.10.2/tests/qemumonitorjsontest.sock too long for unix socket: File name too long FAILED 4) GetCPUDefinitions ... libvir: XML-RPC error : Path /home/public/abc_v1_v2/libvirt_0.10.2_29/BUILD/libvirt-0.10.2/tests/qemumonitorjsontest.sock too long for unix socket: File name too long FAILED 5) GetCommands ... libvir: XML-RPC error : Path /home/public/abc_v1_v2/libvirt_0.10.2_29/BUILD/libvirt-0.10.2/tests/qemumonitorjsontest.sock too long for unix socket: File name too long FAILED ======================== Is this a known issue ? Is there any specific patch which addresses this issue ? Please let me know. Thanks, Raj

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Re: [libvirt-users] LibVirt + QEMU & no-shutdown
by Michael D 11 Jul '14

11 Jul '14

Scratch that, seems to depend on guest or perhaps even boot device. Finnix live CD halts correctly. Ubuntu 14.04 does not. On 11 July 2014 15:27, Michael D <me(a)md-5.net> wrote: > I am currently running LibVirt with Qemu on Debian Wheezy: > > Versions: > > - libvirtd (libvirt) 1.2.4 > - qemu-x86_64 version 2.0.0 (Debian 2.0.0+dfsg-4~bpo70+1), Copyright > (c) 2003-2008 Fabrice Bellard > > It's all working perfectly, including ACPI: virsh shutdown guest. However > when I issue "halt" from the guest, the guest stops but libvirt thinks it > is still running: (virsh list outputs state: running). virsh dominfo does > the same thing: State: running > > I believe this is due to the -no-shutdown flag passed to qemu, making it > stop the CPUs rather than halt entirely. Is this however a bug that the > status is not updated correctly? I've taken a glance at the source and it > should SIGTERM qemu when it sees the stop, but evidently it isn't. > > > Thanks > > Michael >

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[libvirt-users] LibVirt + QEMU & no-shutdown
by Michael D 11 Jul '14

11 Jul '14

I am currently running LibVirt with Qemu on Debian Wheezy: Versions: - libvirtd (libvirt) 1.2.4 - qemu-x86_64 version 2.0.0 (Debian 2.0.0+dfsg-4~bpo70+1), Copyright (c) 2003-2008 Fabrice Bellard It's all working perfectly, including ACPI: virsh shutdown guest. However when I issue "halt" from the guest, the guest stops but libvirt thinks it is still running: (virsh list outputs state: running). virsh dominfo does the same thing: State: running I believe this is due to the -no-shutdown flag passed to qemu, making it stop the CPUs rather than halt entirely. Is this however a bug that the status is not updated correctly? I've taken a glance at the source and it should SIGTERM qemu when it sees the stop, but evidently it isn't. Thanks Michael

2 2

[libvirt-users] How to config qga to support dompmsuspend
by Hong-Hua.Yin＠freescale.com 10 Jul '14

10 Jul '14

Hi, I tried to run domsuspend command on my PowerPC board but failed. # virsh dompmsuspend sdk --target mem error: Domain sdk could not be suspended error: argument unsupported: QEMU guest agent is not configured It seemed that support suspend-to-mem only from capabilities. # virsh capabilities <capabilities> <host> <uuid>52498f7c-d584-45d8-8a15-345b14fa0d10</uuid> <cpu> <arch>ppc</arch> <topology sockets='1' cores='2' threads='1'/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='1024'/> <pages unit='KiB' size='4096'/> <pages unit='KiB' size='16384'/> <pages unit='KiB' size='65536'/> <pages unit='KiB' size='262144'/> <pages unit='KiB' size='1048576'/> </cpu> <power_management> <suspend_mem/> </power_management> <migration_features> <live/> <uri_transports> <uri_transport>tcp</uri_transport> </uri_transports> </migration_features> <topology> <cells num='1'> <cell id='0'> <memory unit='KiB'>2066304</memory> <cpus num='2'> <cpu id='0' socket_id='0' core_id='0' siblings='0'/> <cpu id='1' socket_id='0' core_id='1' siblings='1'/> </cpus> </cell> </cells> </topology> <secmodel> <model>none</model> <doi>0</doi> </secmodel> <secmodel> <model>dac</model> <doi>0</doi> <baselabel type='kvm'>+0:+0</baselabel> <baselabel type='qemu'>+0:+0</baselabel> </secmodel> </host> <guest> <os_type>hvm</os_type> <arch name='ppc'> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-ppc</emulator> <machine maxCpus='1'>g3beige</machine> <machine maxCpus='32'>ppce500</machine> <machine maxCpus='1'>mac99</machine> <machine maxCpus='15'>mpc8544ds</machine> <machine maxCpus='1'>taihu</machine> <machine maxCpus='1'>ref405ep</machine> <machine maxCpus='1'>bamboo</machine> <machine maxCpus='1'>prep</machine> <machine maxCpus='1'>virtex-ml507</machine> <domain type='qemu'> </domain> <domain type='kvm'> <emulator>/usr/bin/qemu-system-ppc</emulator> </domain> </arch> <features> <deviceboot/> <disksnapshot default='on' toggle='no'/> </features> </guest> </capabilities> I read from some document about qemu guest agent but still don't know how to config it as daemon in guest domain. Best Regards, Olivia

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[libvirt-users] snapshot-create error
by Hong-Hua.Yin＠freescale.com 10 Jul '14

10 Jul '14

Hi, What's the difference between QEMU snapshot and libvirt snapshot? # qemu-img create -f qcow2 disk.img 512 Formatting 'disk.img', fmt=qcow2 size=512 encryption=off cluster_size=65536 lazy_refcounts=off # qemu-img info disk.img image: disk.img file format: qcow2 virtual size: 512 (512 bytes) disk size: 136K cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # /usr/bin/qemu-system-ppc -M ppce500 -enable-kvm -m 512 -nographic -kernel /dev/shm/uImage -initrd /dev/shm/ramdisk -append "root=/dev/ram rw console=ttyS0,115200" -serial tcp::4444,server,telnet -snapshot -hda disk.img QEMU 1.7.0 monitor - type 'help' for more information (qemu) QEMU waiting for connection on: telnet:0.0.0.0:4444,server (qemu) savevm (qemu) info snapshot unknown command: 'info snapshot' (qemu) info snapshots ID TAG VM SIZE DATE VM CLOCK 1 vm-20140709035738 173M 2014-07-09 03:57:38 00:00:07.401 Is there any special qemu command options or kernel configurations to allow libvirt create snapshot? I got the error as below: virsh # snapshot-create snap error: unsupported configuration: internal snapshots and checkpoints require all disks to be selected for snapshot The domain XML file is converted as below steps. # cat >snap.args <<EOF /usr/bin/qemu-system-ppc -name snap -M ppce500 -enable-kvm -m 512 -nographic -kernel /dev/shm/uImage -initrd /dev/shm/ramdisk -append "root=/dev/ram rw console=ttyS0,115200" -serial pty # virsh domxml-from-native qemu-argv snap.args >snap.xml # cat sdk.xml <domain type='kvm'> <name>sdk</name> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='ppc' machine='ppce500'>hvm</type> <kernel>/dev/shm/uImage</kernel> <initrd>/dev/shm/ramdisk</initrd> <cmdline>root=/dev/ram rw console=ttyS0,115200</cmdline> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-ppc</emulator> <controller type='usb' index='0'/> <controller type='pci' index='0' model='pci-root'/> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </memballoon> </devices> </domain> Best Regards, Olivia

2 1

[libvirt-users] qemu+tls question
by Fl＠sh 10 Jul '14

10 Jul '14

I`m generate TLS-certificates for my libvirtd and remote, useing http://wiki.libvirt.org/page/TLSSetup . >From console connect to remote host is success, but from virt-manager -- no: Unable to connect to libvirt. Unable to read TLS confirmation: Input/output error Verify that the 'libvirtd' daemon is running on the remote host. Libvirt URI is: qemu+tls://<remote_host>/system Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1056, in _open_thread self._backend.open (self._do_creds_password) File "/usr/share/virt-manager/virtinst/connection.py", line 158, in open open_flags) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth () failed') libvirtError: Unable to read TLS confirmation: Input/output error Any suggestions? -- Fl@sh

1 1

[libvirt-users] Disk and Network Statistics for a Specific Interval
by Sijo Jose 10 Jul '14

10 Jul '14

Hi, virDomainInterfaceStats - This function returns network interface stats for interfaces attached to the domain. virDomainBlockStats- This function returns block device (disk) stats for block devices attached to the domain. Based on which time interval these function returns values. Is it cumulative from the vms uptime..? OR average ...? How can I get the average statistics of Disk and Network for a specific time interval say time x to time y ..? Regards -Sijo

3 2

[libvirt-users] memoryStats question
by Gleb Voronich 09 Jul '14

09 Jul '14

Hello, I'm trying to get memory usage statistic inside a guest machine using virDomainMemoryStats function at libvirt. According to http://libvirt.org/html/libvirt-libvirt.html#virDomainMemoryStatTags the structure could have a lot of useful memory statistic but the amount of parameters depends on the hypervisor and the driver. However using KVM I'm able to get VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON and VIR_DOMAIN_MEMORY_STAT_RSS only. Am I right it is not possible to get additional info such as used/unused memory inside a guest machine in case of KVM?

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[libvirt-users] Libvirt 1.2.6 patch for Hyper-V 2012 R2 ?
by Evgeny Vasilchenko 09 Jul '14

09 Jul '14

Hello, Does anyone know if the below patch for libvirt 1.2.4 has been integrated into the libvirt 1.2.6 source code? http://www.redhat.com/archives/libvir-list/2014-May/msg00509.html https://github.com/vikhyath/libvirt-hyperv-r2-2012 Thank you! Evgeny

2 2

[libvirt-users] libvirt behind stunnel4
by Parthipan 09 Jul '14

09 Jul '14

Hi, I'm trying this setup where an stunnel4 (listening for clients on port 16514) connects to an unencrypted libvirt backend (on port 16509). When I point the virsh client to stunnel4 it hangs. Looking via tshark: 1. virsh completes ssl handshake with stunnel4 2. stunnel4 completes tcp handshake with libvirt. and that's all. When connecting virsh client directly to libvirt (this time encrypted) tshark shows: 1. virsh completes ssl handshake with libvirt (change cypher spec at the end) 2. libvirt sends something (I can't decode what libvirt sends, since DH key exchange is used.) Anyway my question really is, can libvirt be run as an unencrypted backend behind an ssl offloader such as stunnel4? If people do use it like that, then I can look for any setup issues in mine. My package versions: libvirt: 1.2.2-0ubuntu13.1 stunnel4: 3:4.53-1.1ubuntu1 Thanks ~parthi

1 1

[libvirt-users] How to get uuid info inside a lxc container created by libvirt_lxc
by Qiang Guan 08 Jul '14

08 Jul '14

Hi , Is there anyway to get uuid info inside a lxc container which is created by libvirt_lxc? For kvm, we can use dmidecode or lshw to get this info inside vm. Is there any tools to do this thing for libvirt lxc? Thanks for any help~ -- ------------ Jackie Best Regards

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[libvirt-users] follow-up to thread : Acces to hypervisor from a KVM guest, ( by the way , how to enter a follow up in a thread ?) Thx
by Jean-Pierre Ribeauville 08 Jul '14

08 Jul '14

Hi, This is what I tried : Y , how enter an answer in the thread ?) virsh -c qemu+ssh://127.0.0.1:22/system hostname root(a)127.0.0.1's<mailto:root@127.0.0.1's> password: error: End of file while reading data: : Input/output error error: failed to connect to the hypervisor In another hand ,as we have few information to share , I was thinking to use a virtio channel to dialog between host and guest . Does it fit ? Thx J.P. ? -----Message d'origine----- De : Eric Blake [mailto:eblake@redhat.com] Envoyé : vendredi 4 juillet 2014 15:20 À : Jean-Pierre Ribeauville; libvirt-users(a)redhat.com<mailto:libvirt-users@redhat.com> Objet : Re: [libvirt-users] Acces to hypervisor from a KVM guest On 07/04/2014 04:23 AM, Jean-Pierre Ribeauville wrote: > Hi, > >>From a KVM guest, I want to retrieve the hostname of the host on which the hypervisor is running. > Before doing that by using libvirt API, I first try via virsh. Well, virsh just uses the libvirt API under the hood. I'd suggest that you try: virsh -c qemu://host/system hostname except that this is a chicken-and-egg situation, because virsh in the guest doesn't know what host to connect to. If you are using the out-of-the-box NAT setup, then you could use qemu://192.168.122.1/system, since your guest will be using an IP address assigned from that subnet from the host. Other than that, libvirt is not really designed for guest-to-host communication, but for host management of guests. You'll have to solve your problem in some other way. Consider the same situation with bare metal hosts - if you are provisioning a cluster, and want machines in the cluster to communicate to a particular controller, but not all machines connect to the same controller, how would you do that? If you can solve that problem, then you can use it to solve your guest provisioning problem. > error: Failed to reconnect to the hypervisor > error: no valid connection > error: internal error Unable to locate libvirtd daemon in /usr/sbin > (to override, set $LIBVIRTD_PATH to the name of the libvirtd binary) This failure is because you did not use -c to connect to a remote daemon, but don't have libvirtd running in the guest. You do not need libvirtd running locally to use virsh for remote connections, but you do need to know where the remote connection lives. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org [cid:image001.png@01CF75CE.35F97F50] Jean-Pierre RIBEAUVILLE Developer Tel: 01 49 11 45 81 Discover Systar's Videos!<https://www.youtube.com/channel/UCvyaJkMXCGFo8_XZYd9rcBw> P Please consider the environment before printing this e-mail

3 2

[libvirt-users] getting CPU usage through virsh command or libvirt API
by Restituto Marcus Arevalo 08 Jul '14

08 Jul '14

Hi, Is it possible to get the CPU usage of a guest through a virsh command? I have tried almost all the commands (vcpuinfo, cpu-stats, etc.) that gets the details of a guest cpu, but it only returns the cpu time. Is there any command that returns the cpu usage (just like the graph that virt-manager displays) of a guest? Or do I have to create a program using libvirt API? Thanks in advance. regards, Marco

3 2

[libvirt-users] qemu-kvm version for CentOS
by kerwin 08 Jul '14

08 Jul '14

WHY CentOS still using qemu-kvm 0.12? What I am need is high version of qemu-kvm for CentOS, but seems like they do not officially provide newest qemu, only qemu 0.12 source code with 3522 patched rpm package. Is there any reasonable to keep low version for qemu-kvm ? or what should I do if I need newest qemu-kvm rpm package? ✉ -- 朴元奎 kerwin

5 4

[libvirt-users] virsh: cannot start domain with channel device,
by John 07 Jul '14

07 Jul '14

Here is what I got. root ubuntu:/home/john# virsh start ubuntu2 error: Failed to start domain ubuntu2 error: internal error Process exited while reading console log output: char device redirected to /dev/pts/1 bind(unix:/var/lib/libvirt/qemu/ubuntu2.libguestfs): Permission denied chardev: opening backend "socket" failed: Permission denied root ubuntu:/home/john# ll /var/lib/libvirt/qemu/ total 20 drwxr-x--- 5 libvirt-qemu kvm 4096 Jul 5 14:44 ./ drwxr-xr-x 8 root root 4096 May 20 04:18 ../ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 dump/ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 save/ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 snapshot/ root ubuntu:/home/john# cat /etc/libvirt/qemu/ubuntu2.xml  <domain type='kvm' xmlns:qemu='/schemas/domain/qemu/1.0'> <qemu:commandline> <qemu:arg value='-s'/> </qemu:commandline> <name>ubuntu2</name> <uuid>03f4c36d-9509-05dd-167d-d2613d1dd883</uuid> <memory>1024000</memory> <currentMemory>1024000</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <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='qcow2'/> <source file='/home/john/ubuntu-1204-vm.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' 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:d4:7d:07'/> <source bridge='br0'/> <model type='virtio'/> <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'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <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='0x05' function='0x0'/> </memballoon> <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/ubuntu2.libguestfs' /> <target type='virtio' name='org.libguestfs.channel.0' /> </channel> </devices> </domain> When I deleted the <channel>...</channel> part, it will start normally. But I need it to use guestfish with --live option. No SELinux or AppArmor is used. qemu.conf shows it's running by root user. I did "virsh start" operation under root and the error remains. Should I change the permission attributes of files under /var/lib/libvirt/qemu ?

2 1

[libvirt-users] Source code of virt-manager
by Restituto Marcus Arevalo 07 Jul '14

07 Jul '14

Hi, Does anyone know where I could view the source code of virt-manager? Because I'm trying to learn how the virt-manager gets the CPU usage of a VM(the graph it displays). I'm trying to make a program using java that gets the CPU usage of a VM in KVM. Anybody have suggestions on where I could start?Thanks regards, Marco

2 1

[libvirt-users] virsh blockcopy: doesn't seem to flatten the chain by default
by Kashyap Chamarthy 05 Jul '14

05 Jul '14

Versions -------- (Libvirt locally built from a recent git commit -ec7b922): $ rpm -q libvirt-daemon-kvm qemu-system-x86 libvirt-daemon-kvm-1.2.6-1.fc20.x86_64 qemu-system-x86-2.0.0-1.fc21.x86_64 Test ---- [All images are qcow2 files.] We have this simple chain: base <- snap1 Let's quickly examine the contents of 'base' and 'snap1' images: 'base' has just a single file: foo $ guestfish --ro -a base.qcow2 [. . .] ><fs> ls / ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / foo lost+found ><fs> quit 'snap1' has files: bar, baz, jazz $ guestfish --ro -a snap1.qcow2 [. . .] ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / bar baz jazz lost+found ><fs> Now, let's do a live blockcopy (with a '--finish' to graecully finish the mirroring): $ virsh blockcopy --domain testvm2 vda \ /export/dst/copy.qcow2 \ --wait --verbose --finish Examine the contents of the above 'copy': $ guestfish --ro -a copy.qcow2 [. . .] ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / bar baz jazz lost+found ><fs> quit If I'm reading the man page of 'blockcopy' correctly, shouldn't it 'flatten' the entire chain, by also copying the contents of base into copy.qcow2? i.e. the 'copy' should have files (including the file foo from 'base': foo, bar, baz, jazz True or false? PS: I've tested the cases of --pivot, --shallow and --reuse-external, will post my notes about them on a wiki. -- /kashyap

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[libvirt-users] Acces to hypervisor from a KVM guest
by Jean-Pierre Ribeauville 04 Jul '14

04 Jul '14

Hi, >From a KVM guest, I want to retrieve the hostname of the host on which the hypervisor is running. Before doing that by using libvirt API, I first try via virsh. So, I run virsh and the run hostname command.( got that in virsh help : .... hostname print the hypervisor hostname ....) Unfortunately, I got following error when starting virsh : error: Failed to reconnect to the hypervisor error: no valid connection error: internal error Unable to locate libvirtd daemon in /usr/sbin (to override, set $LIBVIRTD_PATH to the name of the libvirtd binary) Do I miss to install some package on my KVM guest ? or is it not the right way to get this information ? Any help is welcome. Thx. [cid:image001.png@01CF75CE.35F97F50] Jean-Pierre RIBEAUVILLE Developer Tel: 01 49 11 45 81 Discover Systar's Videos!<https://www.youtube.com/channel/UCvyaJkMXCGFo8_XZYd9rcBw> P Please consider the environment before printing this e-mail

2 1

[libvirt-users] os/type/machine/pc-xxxx meaning ? following live migration issue after an upgrade
by Benoit Rousselle 04 Jul '14

04 Jul '14

Dear All, I have upgrade my hypervisors: qemu-kvm 0.12.5 => 1.1.2 libvirt-bin 0.8.3-5 => 0.9.12.3 (debian6 to debian7) After that upgrade, i noticed that live migration was most of the time failing (freeze) (not always) I also noticed that creating a machine with the updated hypervisor was always working. After some days of investigation mainly on network side, i found this setting that seems to fix the issue in the xml: <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> replacing pc-0.12 with pc-1.1 seems to fix the issue. Here are my questions : 1) what is the meaning/purpose of that setting ? (i guess it is somehow linked to the version of kvm ;) ) 2) can i just change it in all xmls ? ( i have plenty of linux/windows flavors running in my vms) 3) is it possible to put a more generic value? So we don't have the same issue on next upgrade. 4) Is there a script/doc that explains what needs to be done on the vm itself (xml or other) when we upgrade libvirt/kvm ? Thanks for the feedback ! Benoit. -- Benoit Rousselle

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[libvirt-users] getting CPU usage of VMs through libvirt
by Restituto Marcus Arevalo 04 Jul '14

04 Jul '14

Greetings everyone, I just want to ask if it is possible to get the CPU usage of the VMs in KVM through libvirt? I mean, how does the virt-manager produce the graph it displays? Is there a way get this graph? But instead of the graph itself, I just need to get it in percentage(%) form. I'd like to know how. Thank you and your help will be greatly appreciated. regards, Marco

2 1

[libvirt-users] Domain Storage type
by Sijo Jose 04 Jul '14

04 Jul '14

Hi, How can we identify a domain is using Shared storage OR Non shared storage using libvirt -API? Rgds -Sijo

2 1

[libvirt-users] How can I setup a privileged container
by WANG Cheng D 03 Jul '14

03 Jul '14

Dear all, I want to setup a privileged container, which means I can set the priority of a process to SCHED_RR (real-time) dynamically by calling sched_setscheduler() in a C program running on a container. In my system (host: fedora19, container: fedora19, libvirt 1.2.5), my C code reports "operation not permitted" when sched_setscheduler() is called. I found a link (https://www.redhat.com/archives/libvir-list/2014-June/msg00562.html) which is talking about container capability drops and keeps, but only "nice" is mentioned and I don't know how to turn on "priority" feature on a container? Any comments are highly appreciated. Cheng

1 0

[libvirt-users] all windows vm could not start because the following file is missing or corrupt
by Lucas -LandM- 02 Jul '14

02 Jul '14

Hi, After some problems in the server I can't start windows XP virtual machines. - Yesterday we got full disk (100%). I deleted some files. Solved. - I update Centos 5.6. I guess libvirt was updated from 0.9 to 0.10. We have to use this kernel: 2.6.32-042stab079.6 because this bug is not in the release: https://bugzilla.openvz.org/show_bug.cgi?id=2915 Now, I try to start windows XP machines and all give me same error could not start because the following file is missing or corrupt c:\WINDOWS\SYSTEM32\CONFIG\SYSTEM If this error were in a particular VM I try to solve it manually, but same error in three diferent VM is not a coincidence. I suppose it is a upgrade issue. What should I do? Thanks in advanced, Lucas

1 0

[libvirt-users] changing the priority of a process in the container is not permitted
by WANG Cheng D 02 Jul '14

02 Jul '14

Dear all, I want to run a process in a container with a real-time (RT) priority. When the sched_setscheduler(0, SCHED_RR, &sparam) is called in the container, an error is reported which is "operation not permitted" I had added the following line in the file /etc/security/limits.conf for both the host and the container, which means allowing all users to change the priority of the process, but it still doesn't work. * - rtprio 100 I wonder how to change the privilege of a container so that it has the similar privilege of the root user of the host. Thank you in advance Cheng

1 0

[libvirt-users] Libvirt installion error: You must install the libyajl library & headers to compile libvirt
by WANG Cheng D 02 Jul '14

02 Jul '14

Dear all, I am installing the libvirt 1.2.5 on my newly installed Fedora19. When I run ./configure, an error is reported: "You must install the libyajl library & headers to compile libvirt" In fact, the package yajl-2.0.4-2fc19.x86_64.rpm has been installed on the fedora19. I found several links talking about this error and I downloaded 3 files (configure.ac, m4/virt-yajl.m4, src/qemu/qemu_capabilities.c) from the link given by Daniel Berrange (http://libvirt.org/git/?p=libvirt.git;a=commit;h=654c709baaa6fdcff6b6d38abb…) , but it does not work. Am I missing something? Best regards, Cheng

4 10

[libvirt-users] virsh update-device issues
by Oleg Bondarev 01 Jul '14

01 Jul '14

Hi, I faced a couple of issues with libvirt update-device function: 1. http://libvirt.org/hvsupport.html says that virDomainUpdateDeviceFlags is supported since 0.8.0 API version in qemu driver. However when trying to update network device (changing source bridge of the interface) on Ubuntu with 0.9.8 libvirt version I get the following error: "*this function is not supported by the connection driver: cannot modify network device configuration"* What may be the reason for such error? 2. Not able to rename target device name of an interface. For example if have running instance with interface: * <interface type='bridge'>* * <mac address='fa:16:3e:80:f4:49'/>* * <source bridge='qbre1894135-13'/>* * <target dev='vnet0'/>* * <model type='virtio'/>* * <alias name='net0'/>* * <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>* * </interface>* and then try to update: *$ sudo virsh update-device --persistent --config --live 1 dev.xml* where dev.xml: * <interface type='bridge'>* * <mac address='fa:16:3e:80:f4:49'/>* * <source bridge='qbre1894135-13'/>* * <target dev='tap123'/>* * <model type='virtio'/>* * </interface>* I get: * error: Failed to update device from dev.xml* * error: Operation not supported: cannot modify network device tap name* This happens even if rename vnet0 to tap123 manually with *ip link set vnet0 name tap123* before interface update. And after instance reboot tap123 is renamed back to vnet0. Is there a strong reason to not allow modifying network device tap name? Will appreciate any assistance with the described issues. Thanks, Oleg

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[libvirt-users] libvirt error
by abhishek jain 01 Jul '14

01 Jul '14

Hi I need to run libvirt without ebtables support as it results in following error while running VM.... sudo virsh start instance-0000000b error: Failed to start domain instance-0000000b error: Error while building firewall: Some rules could not be created for interface tapf733e054-fe: Failure to execute command '$EBT -t nat -A libvirt-J-tapf733e054-fe -j J-tapf733e054-fe-mac' : 'Unable to update the kernel. Two possible causes: 1. Multiple ebtables programs were executing simultaneously. The ebtables userspace tool doesn't by default support multiple ebtables programs running concurrently. The ebtables option --concurrent or a tool like flock can be used to support concurrent scripts that update the ebtables kernel tables. 2. The kernel doesn't support a certain ebtables extension, consider recompiling your kernel or insmod the extension. .'. Please help regarding this. Thanks Abhishek Jain

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