November 2011 - Users - libvirt List Archives

[libvirt-users] libvirt and linux-vserver
by Christian Parpart 23 Nov '11

23 Nov '11

Hi, I was just googling around for linux-vserver support in libvirt, however, only found sad ppl complaining about the fact, that there is still no linux-vserver support in libbirt. Despite the fact, that there was some kind of lag in review by more than one person, why isn't it still in? so... merely two years after? I think once the patched would have been applied, ppl would start using it, and then also report bugs in case there were some not yet found by the author nor the single reviewer :) Best regards, Christian Parpart.

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[libvirt-users] Ruby libvirt gem: state reasons
by Ken Coar 18 Nov '11

18 Nov '11

Does anyone know of a way to use the Ruby bindings to find out the 'reason' value for the state of the VM? Such as obtaining VIR_DOMAIN_RUNNING_BOOTED for a running domain? -- #ken B-)} Ken Coar, Sanagendamgagwedweinini IT Engineering Tower, Red Hat/RDU "Millennium hand and shrimp!"

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[libvirt-users] Defined VM goes missing in multi-threaded environment.
by Sharad Mishra 18 Nov '11

18 Nov '11

In a multi-threaded environment where multiple threads are trying to get list of all VMs on host, we have seen that at times this list is missing couple of VMs. The code used is fairly simple, it makes three libvirt calls. 1. Call virConnectNumOfDefinedDomains() to get number of defined domains. 2. Call virConnectNumOfDomains() to get a list of active domains. 3. If there are defined domains, then call virConnectListDefinedDomains (conn, (char **)names, n_names), where n_names is the count returned from #1. The count returned from #3 is less than the one returned from #1. I have bumped up the connection count in libvirtd.conf to 100, and using 20 threads. On average I get one missing defined VM every 5 runs of this test. I have 25 running VMs and 8 defined VMs on this host. # rpm -aq | grep libvirt libvirt-python-0.8.7-18.el6_1.1.x86_64 libvirt-0.8.7-18.el6_1.1.x86_64 libvirt-cim-0.5.14-1.el6.x86_64 libvirt-client-0.8.7-18.el6_1.1.x86_64 Its RHEL 6.1 running 2.6.32-131.17.1.el6.x86_64 Regards, Sharad Mishra

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[libvirt-users] [libvirt-user] questions about disk driver virtio and charmonitor
by Chang Liu 17 Nov '11

17 Nov '11

hi all, I have two questions about libvirt. At first, how can I write a XML file that libvirt could give me a command that include this: if=virtio. -drive file=/dev/vg.vmms/lvm-v097218.sqa.cm4,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 event I have let the <target dev=vda bus=virtio> the XML file also make the command not include virtio, it's like this: -drive file=/dev/vg.vmms/lvm-v097226.sqa.cm4,if=none,id=drive-virtio-disk0,format=raw,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 and my question is, this is command args could enable virtio? or there is some other XML format could let the if=virtio. Second when I boot the vm in the second step after use the kickstart install it. Once in a while, it occurs an error that: monitor socket did not show up.: No such file or > Traceback (most recent call last): File "/home/lingjiao.lc/vmms/backserv/bin/../lib/virtmgr.py<http://lingjiao.lc/vmms/backserv/lib/virtmgr.py>", line 1007, in request_vm dom.create() File "/usr/lib64/python2.6/site-packages/libvirt.py", line 325, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: monitor socket did not show up.: No such file or directory But if I reinstall it, it will be ok. If I install hundreds of VMs once, I think this is a headache. Could anybody help me, how can I disable the charmonitor or solve these problem. Thanks. ________________________________ This email (including any attachments) is confidential and may be legally privileged. If you received this email in error, please delete it immediately and do not copy it or use it for any purpose or disclose its contents to any other person. Thank you. 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。

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[libvirt-users] libvirt uninstall @ install problem??
by 张光鹏 17 Nov '11

17 Nov '11

Hi: I have a rhel6.1 system, before I installed libvirt0.9.6.tar.gz, it already have installed libvirt-0.8.7-xxx.rpm. Can someone tell me how to uninstall the libvirt-0.8.7XXX.rpm ,and then i can install libvirt0.9.6.tar.gz and use it . Thanks! zhanggp(a)neusoft.com --------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. ---------------------------------------------------------------------------------------------------

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[libvirt-users] consider bios upgrade...
by jurgen.depicker＠let.be 17 Nov '11

17 Nov '11

Dear all, I didn't get any reply, so I send this mail again. On one of my windows Vms (KVM), I get from time to time a 'windows recovered from a serious error' message, and if I click the wonderfully useful (ahum) support link, I reach this page: http://wer.microsoft.com/responses/Response.aspx/1445/en/5.1.2600.2.0001010… I quote the first part of it here: "Consider BIOS upgrade Microsoft is unable to determine the exact cause of this error. However, this problem was most likely caused by an error in your computer’s random access memory (RAM). RAM is the main internal storage area the computer uses to run programs and store data. During the crash analysis, we noticed the basic input/output system (BIOS) version on this computer does not match the specifications for the central processing unit (CPU), also known as a processor, that is installed on your computer. This can occur when a newer processor is installed on an older system board or older BIOS. Using a BIOS that does not support the installed processor can result in Windows system crashes. Contact your computer manufacturer or motherboard manufacturer for an updated version of BIOS for your computer's processor." Now I'm not sure what this is all about: how can I possibly upgrade my VM's BIOS, or should I do something else? Can it have something to do with the processor specs in the VM's XML definition? Thanks for looking into this, Jürgen

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[libvirt-users] Checking if the VM has been created
by Preethi Ramesh 17 Nov '11

17 Nov '11

I'm a Libvirt newbie and I'd really appreciate it if someone could answer my doubts. I'm using Libvirt's Java API. My doubts: 1.Currently, I'm able to create a VM on Ubuntu 11.04 using Libvirt functions domainCreateLinux() and domainDefineXML(). Apart fromt the boolean return status of these operations and running the virsh list command, is there any way to SSH in (login) to the newly created VMs and run applications on them? I tried running virsh console but nothing comes up. Also I tried fixing the XML file to accommodate the console operation( link <http://ubuntuforums.org/showthread.php?t=1159220>) but that was unsuccessful too. 2. If yes, how can I get the IP of the VM created? 3. Is there any function to create image files(in any format qcow or qcow2) using Libvirt API? Right now, I'm using a shell script which creates the image from it's iso. Thanks in advance P Ramesh

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[libvirt-users] Speaking of DNSmasq ....
by William A. Mahaffey III 17 Nov '11

17 Nov '11

.... I am getting a bit tired of those pesky DNSmasq entries in my syslog file, they fill it up about weekly, wash other stuff out of view on a tail. Is there any way to suppress them. or else increase their lease time so that they happen less frequently ? Having a finite lease time for a VM seems nonsensical, it can't go anywhere or disconnect (obviously) .... I tried restarting DNSmasq, but it said 'Socket busy' or some such & didn't restart. Someone on another list said that DNSmasq was/is in fact started by libvirt/KVM/QEMU, & I poked around in the various /etc/sysconfig files, but couldn't find anything related to DNSmasq, whatever options it is started with seem to be hardwired or compiled into one of the pertinent executables .... FC 14, 64 bit, terminally patched up, libvirt 0.8.3-10.fc14 64-bit, qemu-KVM 2:0.13.0-1.fc14 64-bit .... TIA .... -- William A. Mahaffey III ---------------------------------------------------------------------- "The M1 Garand is without doubt the finest implement of war ever devised by man." -- Gen. George S. Patton Jr.

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[libvirt-users] virsh Attach-disk function
by Jatin Kumar 16 Nov '11

16 Nov '11

Hello, I have to use attach-disk function for providing additional storage to the guest domain but i couldn't found proper documentation anywhere which i can follow. ---- For linux (Ubuntu 11.10 server edition, 64bit) guest i tried qemu-img create -f qcow2 disk.qcow2 size virsh attach-disk guest_name --driver file disk.qcow2 sdc Both of the above commands are working fine but when i try to format the drive from inside linux then its size reduces to few KB. Before formatting qemu-img info reports correct info(as expected, correct virtual size) but after formatting the even qemu-img info reports its actual size(few KB) not virtual size. ----- For windows (Windows 2008 Server R2) guest, i tried qemu-img create -f raw disk.img size virsh attach-disk guest_name --driver file disk.img vdb virsh shows that the disk is attached successfully, but i cannot find any disk attached from inside the guest (in storage management). I tried rebooting the guest but same problem. Is there anything that i am doing wrong or missing. -- Jatin Kumar

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[libvirt-users] listDomains() not working on Xen
by PREETHI RAMESH 15 Nov '11

15 Nov '11

Hey all, I've been trying to make listDomains() work on Xen but it simply returns an array of null values. Also, while displaying the length of the array returned by listDomains(). Upon using the same function in KVM, I'm able to retrieve the complete array of active machines. I'm positive that active Xen machines are running(cross checked it with xm list). I've been posting this for quite sometime now but haven't received any reply which could debug my code. I'd really appreciate it if someone could help me. Thanks, P Ramesh

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