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[libvirt-users] What's the precision of the domain cpu stats?
by Zhihua Che 17 Apr '12

17 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 17 Apr '12

17 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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[libvirt-users] A way to determine when a guest domain was launched?
by Amy Skinner 16 Apr '12

16 Apr '12

I've looked around at the API documents (I'm using python) and I know how to find the cpu active uptime of the domain, but that only increases if the domain is running something. Is there a way to determine when the domain was first launched, either as a date or uptime with idle uptime included? /Amy

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[libvirt-users] Live migration of instance using KVM hypervisor fails
by Gurjar, Unmesh 13 Apr '12

13 Apr '12

Hi, I am trying to migrate a running instance, but it fails with the following error: $ virsh migrate --live instance-00000008 qemu+tcp://10.2.3.150/system --verbose error: operation failed: migration job: unexpectedly failed I can see following in the instance specific qemu log directory (/var/log/libvirt/qemu/instance-00000008.log) on the destination host: 2012-04-12 03:57:26.211: starting up 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-0.14 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-00000008 -uuid 86b357d0-b76d-4cde-a0d1-90fb65508ff2 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000008.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=readline -rtc base=utc -boot c -kernel /opt/stack/nova/mnt_instances/instance-00000008/kernel -initrd /opt/stack/nova/mnt_instances/instance-00000008/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/nova/mnt_instances/instance-00000008/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -netdev tap,ifname=tap57b16714-9a,script=,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:45:b3:c6,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/nova/mnt_instances/instance-00000008/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -k en-us -vga cirrus -incoming tcp:0.0.0.0:49169 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 Domain id=20 is tainted: high-privileges Domain id=20 is tainted: shell-scripts char device redirected to /dev/pts/17 2012-04-12 03:57:26.850: shutting down can't delete tap57b16714-9a from eth1: Operation not supported SIOCSIFADDR: Permission denied SIOCSIFFLAGS: Permission denied SIOCSIFFLAGS: Permission denied /etc/qemu-ifdown: could not launch network script Libvirt version on both hosts: $ libvirtd --version libvirtd (libvirt) 0.9.2 $ virsh --version 0.9.2 Here are my libvirtd.conf details: listen_tls = 0 listen_tcp = 1 unix_sock_group = "libvirtd" unix_sock_rw_perms = "0770" auth_unix_ro = "none" auth_unix_rw = "none" auth_tcp = "none" Would be great if someone can point out the issue here. Note: I have disable apparmor for libvirtd profile and am able to list the instances running on the remote host (from both the servers). Thanks & Regards, Unmesh Gurjar | Lead Engineer | Vertex Software Private Ltd. | w. +91.20.6604.1500 x 379 | m. +91.982.324.7631 | unmesh.gurjar(a)nttdata.com<mailto:unmesh.gurjar@nttdata.com> | Follow us on Twitter@NTTDATAAmericas ______________________________________________________________________ Disclaimer:This email and any attachments are sent in strictest confidence for the sole use of the addressee and may contain legally privileged, confidential, and proprietary data. If you are not the intended recipient, please advise the sender by replying promptly to this email and then delete and destroy this email and any attachments without any further use, copying or forwarding

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[libvirt-users] No way to obtain guest's cpu and mem usage?
by RaSca 12 Apr '12

12 Apr '12

Hi everybody, I'm using the PHP API to make a web interface interact with the virtual machines installed on some hypervisor. Everything is fine, but I would like to find a way to get the guest's cpu and mem usage, so that it should be possible to make some rrd graphs. I didn't find out anything and also it seems looking around that there is no way to obtain those data. What is strange for me is that programs like virt-top are showing exactly what I'm looking for. Can anyone help me to find out a way to retrieve those statistics? Another related question: do you think I can obtain the same data by using this: ps aux | egrep "[/]usr/libexec/qemu-kvm.*libvirt.*" | awk '{print $3"/"$4}' on the hypervisor? These are related to the kvm process, and the kvm process IS the virtual machine... Or not? Thanks to everybody, -- RaSca Mia Mamma Usa Linux: Niente è impossibile da capire, se lo spieghi bene! rasca(a)miamammausalinux.org http://www.miamammausalinux.org

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[libvirt-users] Can I get all esx servers by virsh connecting vcenter?
by li_fuqiong 12 Apr '12

12 Apr '12

To Whom may be concerned: I connect a vCenter by vpx://example-vcenter.com/dc1/srv1 , but how I get all esx servers managed by this vCenter? Thank you. Mark

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[libvirt-users] Libvirtd not starting on reboot
by Shawn Davis 12 Apr '12

12 Apr '12

Hello everyone, I have libvirt and qemu/kvm running on ubuntu 11.10 desktop. Everything is working great when it is on. The problem is if I reboot, virsh doesn't see the hypervisor anymore and I can't manually start libvirtd. Libvirtd is currently located in /usr/sbin/libvirtd and I originally started it with sudo ./libvirtd -d from that directory. How do I ensure that libvirtd starts on bootup of the host machine? Thanks, Shawn

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[libvirt-users] vol-wipe and delete
by Shawn Davis 12 Apr '12

12 Apr '12

Hello all, I know libvirt has the following two commands: vol-wipe vol-delete Can someone please explain to me how these function? Do these only remove previous session data so that a new virtual instance cannot see it or does it remove it at the physical level level too so that the data cannot be found anywhere on the physical drive? I know Eucalyptus and KVM use sparse files upon instance creation and the instance thinks the ephemeral space is all zeroes even though it is just sparse. I appreciate any insight in how the two virsh commands work and if they use zeroes, sparse, or some other method. Thanks, Shawn

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[libvirt-users] virsh attach-disk with cache=none and io=native for raw devices (online)
by Frido Roose 11 Apr '12

11 Apr '12

Hello, I see there is an option with virsh attach-disk to set the cache to "none" for raw devices, but I can't find how to attach the disk with io=native (needed for performance reasons). The goal is to attach a disk online, directly with the proper performance settings. I know I can set this in virt-manager, but then I have to restart the VM to apply the change, so this is an offline operation. With virsh edit, I guess I also would have to restart the VM... -- Frido Roose Sent with Sparrow (http://www.sparrowmailapp.com/?sig)

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