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[libvirt-users] [API reference] Are there XML-handling API to retrieve info directly from xml configure file
by Zhihua Che 18 Apr '12

18 Apr '12

Hi, everyone I'm writing a application using libvirt and need to query guest os's virtual network interface usage, like bytes read or written through a given interface. I know int virDomainInterfaceStats(virDomainPtr dom, const char * path, virDomainInterfaceStatsPtr stats, size_t size) is designed for my purpose but I 'm not sure how I determine the second parameter path. I'm now think of determining the virtual interface by parsing the domain's xml configure file. But I don't find that libvirt supply such functions, that means, I have to resort to other library lik libxml? thanks

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[libvirt-users] Guests can't connect to each other
by Anthony Bourguignon 18 Apr '12

18 Apr '12

Hi, I'm using libvirt and qemu on Debian Wheezy. I'm having a strange behavior. Guests can't connect to each other when they're on the same host. On the host I'm using bonding (in active / backup mode) and vlan. It looks like this : eth0 \ / macvtap0 bond0 --- vlan222 eth1 / \ macvtap1 So I've got two guests, let's say A and B. When I try to ping B from A, it works : # ping -s 3000 -c 5 78.109.95.11 PING 78.109.95.11 (78.109.95.11) 3000(3028) bytes of data. 3008 bytes from 78.109.95.11: icmp_req=1 ttl=64 time=0.065 ms 3008 bytes from 78.109.95.11: icmp_req=2 ttl=64 time=2.19 ms 3008 bytes from 78.109.95.11: icmp_req=3 ttl=64 time=1.43 ms --- 78.109.95.11 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4001ms rtt min/avg/max/mdev = 0.065/0.960/2.197/0.760 ms But nothing happens when I try to ssh it (not even a timeout). You'll find enclosed the tcpdump captures on the source and the destination. It's the same when I use netcat in udp. At the same time, connection from the host to one guest is working perfectly. There is no iptables rule on the host, and nothing too on the guests. Here are the virsh dumpxml of the different components : # virsh dumpxml vm1 <domain type='kvm' id='11'> <name>vm1</name> <uuid>4eaaed00-c610-b468-ad55-600a0b4e244c</uuid> <memory>2048000</memory> <currentMemory>2048000</currentMemory> <memoryBacking> <hugepages/> </memoryBacking> <vcpu cpuset='0,2,4,8,10,12,14'>8</vcpu> <cputune> <vcpupin vcpu='0' cpuset='0,8'/> <vcpupin vcpu='1' cpuset='2,10'/> <vcpupin vcpu='2' cpuset='4,12'/> <vcpupin vcpu='3' cpuset='6,14'/> <vcpupin vcpu='4' cpuset='0,8'/> <vcpupin vcpu='5' cpuset='2,10'/> <vcpupin vcpu='6' cpuset='4,12'/> <vcpupin vcpu='7' cpuset='6,14'/> </cputune> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> <boot dev='network'/> </os> <features> <acpi/> <apic/> </features> <cpu match='exact'> <model>Westmere</model> <vendor>Intel</vendor> <topology sockets='1' cores='8' threads='1'/> <feature policy='require' name='tm2'/> <feature policy='require' name='est'/> <feature policy='require' name='vmx'/> <feature policy='require' name='ds'/> <feature policy='require' name='smx'/> <feature policy='require' name='ss'/> <feature policy='require' name='vme'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='rdtscp'/> <feature policy='require' name='ht'/> <feature policy='require' name='dca'/> <feature policy='require' name='pbe'/> <feature policy='require' name='tm'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='pclmuldq'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='acpi'/> <feature policy='require' name='monitor'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vps/vm1'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <interface type='network'> <mac address='52:54:00:0e:58:ae'/> <source network='vlan222'/> <target dev='macvtap0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/0'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='0.0.0.0' keymap='fr'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='vga' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> # virsh dumpxml vm2 <domain type='kvm' id='13'> <name>vm2</name> <uuid>4f760831-22b1-ff3b-26e7-6b3fec49e918</uuid> <memory>2048000</memory> <currentMemory>2048000</currentMemory> <memoryBacking> <hugepages/> </memoryBacking> <vcpu cpuset='1,3,5,7,9,11,13,15'>8</vcpu> <cputune> <vcpupin vcpu='0' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='1' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='2' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='3' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='4' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='5' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='6' cpuset='1,3,5,7,9,11,13,15'/> <vcpupin vcpu='7' cpuset='1,3,5,7,9,11,13,15'/> </cputune> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> <boot dev='network'/> </os> <features> <acpi/> <apic/> </features> <cpu match='exact'> <model>Westmere</model> <vendor>Intel</vendor> <topology sockets='1' cores='4' threads='2'/> <feature policy='require' name='tm2'/> <feature policy='require' name='est'/> <feature policy='require' name='vmx'/> <feature policy='require' name='ds'/> <feature policy='require' name='smx'/> <feature policy='require' name='ss'/> <feature policy='require' name='vme'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='rdtscp'/> <feature policy='require' name='ht'/> <feature policy='require' name='dca'/> <feature policy='require' name='pbe'/> <feature policy='require' name='tm'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='pclmuldq'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='acpi'/> <feature policy='require' name='monitor'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vps/vm2'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <interface type='network'> <mac address='52:54:00:cb:ce:41'/> <source network='vlan222'/> <target dev='macvtap1'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0' keymap='fr'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='vga' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> # virsh net-dumpxml vlan222 <network> <name>vlan222</name> <uuid>2b763b5c-4ec1-9b5f-b29d-b7a7ea0f743d</uuid> <forward dev='vlan222' mode='bridge'> <interface dev='vlan222'/> </forward> </network> Thanks in advance to help me understand this issue.

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[libvirt-users] help:any docs for open vswitch supporting?
by yue wang 18 Apr '12

18 Apr '12

hi everybody, i saw the new feature: network: support Open vSwitch. how to use this feature? are there any documents about that? i didn't find it on the website. Thanks, Heuye

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[libvirt-users] USB Passthrough with two identical devices
by Hendrik Friedel 17 Apr '12

17 Apr '12

Hello, I'd like to pass throug two identical devices to my VM. (using libvirt, guest is debian). For one device, it works like this: <hostdev mode='subsystem' type='usb'> <source> <vendor id='0x4fa'/> <product id='0x2490'/> </source> <boot order='2'/> </hostdev> But now, I have another device just like this one: Bus 001 Device 007: ID 04fa:2490 Dallas Semiconductor DS1490F 2-in-1 Fob, 1-Wire adapter Bus 001 Device 005: ID 04fa:2490 Dallas Semiconductor DS1490F 2-in-1 Fob, 1-Wire adapter Unfortunately, only one of these two devices appears for the Guest, even if I duplicate the above entry. Now, there's this option to pass devices: <address bus='0x06' device='0x02''/> But the Bus/Device can/might change... Maybe this can be overcome by udev (and maybe this is the default in ubuntu? can someone confirm?) I have tried the latter syntax aswell. Here the log-file: Code: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc -cpu qemu32 -enable-kvm -m 256 -smp 1 -name WG -uuid fd90f0d6-122c-992f-a399-4105ee30d6e3 -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/WG.monitor,server,nowait -monitor chardev:monitor -boot c -drive file=/var/lib/zentyal/machines/WG/WG-Test.qcow2,if=scsi,index=0,boot=on,format=qcow2 -net nic,macaddr=00:16:3e:5d:c7:9e,vlan=0,name=nic.0 -net tap,fd=29,vlan=0,name=tap.0 -serial none -parallel none -usb -usbdevice mouse -vnc 0.0.0.0:0,password -k de -vga cirrus -usbdevice host:04fa:2490 -usbdevice host:04fa:2490 usb_create: no bus specified, using "usb.0" for "usb-host" husb: open device 1.5 husb: config #1 need -1 husb: 1 interfaces claimed for configuration 1 husb: grabbed usb device 1.5 usb_create: no bus specified, using "usb.0" for "usb-host" What's odd in this: -usbdevice host:04fa:2490 -usbdevice host:04fa:2490 And this, although I had used the bus/device syntax... So, what would you recommend? Regards, Hendrik

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[libvirt-users] What does cpu_time returned by virDomainGetCPUStats mean?
by Zhihua Che 17 Apr '12

17 Apr '12

hi, everyone. I find an 'interesting' thing involving virDomainGetCPUStats(). I call it for cpu usage consumed by a domain and get a array of virTypedParameter. My system is 2-core and hyperviser return 1 parameter per cpu. So the contents of the array is like this. virTypedParameter[0] { .fiedl = "cpu_time" .type = 4 .value.ul = 51640610899 } virTypedParameter[1] { .field = "cpu_time" .type = 4 .value.ul = 55302820304 } I thought this value store the run time of the cpu since last boot. But I find I was wrong because this value would increase until it wraps down and doesn't reset even the domain is restarted. So, what does this value mean? How can I get the CPU usage of the domain? I found nothing on the API reference doc page:-(. No word is related with the meaning of the returned array of virTypedParameter by virDomainGetCPUStats().

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[libvirt-users] Ansis Atteka has invited you to use Google Talk
by Ansis Atteka 16 Apr '12

16 Apr '12

------------------------------------------------------------------------ Ansis Atteka has invited you to sign up for Google Talk so you can talk to each other for free over your computers. To sign-up, go to: http://www.google.com/accounts/NewAccount?service=talk&sendvemail=true&skip… Google Talk is a downloadable Windows* application that offers: - Free calls over your computer anytime, from anywhere, and for as long as you want - A simple and intuitive user interface for sending instant messages or making calls--no clutter, pop-ups or ads - Superior voice quality through just a microphone and computer speaker - Fast file transfers with no restrictions on file type After signing-up, download Google Talk and sign in with your new Google Account username and password. You can then begin inviting anyone you want to talk to for free. Google Talk works with any computer speaker and microphone, such as the ones built-in to many PC laptops today, as well as with wired and wireless headsets and USB phones. Google Talk also works across all firewalls. Google Talk is still in beta. Just like with Gmail, we're working hard to add features and make improvements, so we might also ask for your comments and suggestions periodically. We appreciate your help in making it even better! Thanks, The Google Talk Team To learn more about Google Talk before signing up, visit: http://www.google.com/talk/about.html (If clicking the URLs in this message does not work, copy and paste them into the address bar of your browser). * Not a Windows user? No problem. You can also connect to the Google Talk service from any platform using third-party clients (http://www.google.com/talk/otherclients.html)

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[libvirt-users] [API reference] confused by CPU time term
by Zhihua Che 16 Apr '12

16 Apr '12

Hi, everyone I'm writing a virtual machine monitor based on libvirt. As I read the api reference, I found I'm confused by some terms. 1, What is cumulative I/O wait CPU time? API reference says that VIR_NODE_CPU_STATS_IOWAIT indicate cumulative I/O wait CPU time. I'm confused by this time. As far as I know, when cpu meets IO wait situation, it will schedule another task, so, how this IO wait time is accounted? 2, How do I get VCPU runtime? In my mind, VIR_DOMAIN_CPU_STATS_CPUTIME indicates the physical cpu time consumed by the domain. Is there any API by which I can query virtual CPU running stats in one domain?

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[libvirt-users] What's the precision of the domain cpu stats?
by Zhihua Che 16 Apr '12

16 Apr '12

Hi, everyone I'm using libvirt and resort to virDomainGetCPUStats for cpu usage by one domain. In my system, Ubuntu-11.10 64bit with 2 cores and Qemu Hyperviser, this function returns something like this: virTypedParameter[0] { field: "cpu_time" type: 4 value.ul 51640610899 } virTypedParameter[1] { field: "cpu_time" type: 4 value.ul 55302820304 } This 51640610899 and 55302820304 kind of conflict the result returned by "cat /proc/stat | grep cpu" cpu 449224 6812 89433 4407261 50327 1 2443 0 13041 0 cpu0 224251 2603 43144 2195672 34682 0 2350 0 6692 0 cpu1 224972 4209 46289 2211589 15644 0 93 0 6349 0 I know the precision of /proc/stat is 1/HZ, so what's the precision of CPU stats returned by virDomainGetCPUStats?

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Re: [libvirt-users] libvirt slow responding after define poool with existing VG with some other lv
by Anton Gorlov 16 Apr '12

16 Apr '12

16.04.2012 18:05, Cole Robinson написал: >> 16.04.2012 17:48, Cole Robinson ÐœÐ°Ð¿ÐžÑÐ°Ð»: >>> Sorry, I'd like to help, but judging by your log file this will be a pain to >>> figure out and I can't spare the time. Hopefully we can narrow it down >>> remotely. >> familiar problem... >> in strace i see >> futex(0x7d1f84, FUTEX_WAIT_PRIVATE, 3, NULL) = -1 EAGAIN (Resource temporarily >> unavailable) >> futex(0x7d1f84, FUTEX_WAIT_PRIVATE, 5, NULL<detached ...> > Hmm, maybe try a kernel downgrade? downgrade kernel to 2.6.32 solve problem.

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[libvirt-users] libvirt slow responding after define poool with existing VG with some other lv
by Anton Gorlov 16 Apr '12

16 Apr '12

If I add VG with some other lv-s to libvirt pool then libvirt slow responding. How to fix it? <pool type='logical'> <name>LVM_MAIN</name> <uuid>a2713bed-ad4a-fb79-83b5-65a9e8f1094e</uuid> <capacity>0</capacity> <allocation>0</allocation> <available>0</available> <source> <name>LVM_MAIN</name> <format type='unknown'/> </source> <target> <path>/dev/LVM_MAIN</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> vgdisplay File descriptor 7 (pipe:[37858]) leaked on vgdisplay invocation. Parent PID 12554: bash --- Volume group --- VG Name LVM_MAIN System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 9 VG Access read/write VG Status resizable MAX LV 0 Cur LV 4 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 1.82 TiB PE Size 4.00 MiB Total PE 476931 Alloc PE / Size 139520 / 545.00 GiB Free PE / Size 337411 / 1.29 TiB VG UUID ymYQtb-Xjnd-OBNv-xnUQ-w9gi-5uxm-kjzo not created libvirt /dev/LVM_MAIN/os_mirror VG Name LVM_MAIN LV UUID iPfekp-PN1C-rPHP-Bo3K-TljL-cffi-NdDvpi LV Write Access read/write LV Status available # open 1 LV Size 500.00 GiB Current LE 128000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 created by libvirt-install --- Logical volume --- LV Name /dev/LVM_MAIN/debian6.0-1.img VG Name LVM_MAIN LV UUID 23ncRV-yimL-2OTZ-K4ck-YKNo-s6x6-Bjh3cl LV Write Access read/write LV Status available # open 0 LV Size 15.00 GiB Current LE 3840 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Logical volume --- LV Name /dev/LVM_MAIN/debian6.0-bacula.img VG Name LVM_MAIN LV UUID BFANbb-fFpC-k0wZ-ue5e-Y6bF-Rnbg-tmelt0 LV Write Access read/write LV Status available # open 0 LV Size 15.00 GiB Current LE 3840 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2 --- Logical volume --- LV Name /dev/LVM_MAIN/debian6.0-bacula-1.img VG Name LVM_MAIN LV UUID nTOAaH-3B50-QtQ7-Xf9k-9Q0H-mftQ-p0zdO6 LV Write Access read/write LV Status available # open 0 LV Size 15.00 GiB Current LE 3840 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3

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