July 2012 - Users - libvirt List Archives

[libvirt-users] Preferred CPU model not allowed by hypervisor
by Jared 22 Jul '12

22 Jul '12

Hi, all. I posted this message to libvir-list last night, but just realized that was geared toward development rather than support. Apologies to those who are subscribed to both for the dupe. I'm having a weird problem where libvirt/qemu/kvm won't let me use the model processor I have defined in my domain's config file. Instead, I get the error message in libvirtd.log that: warning : x86Decode:1346 : Preferred CPU model Nehalem not allowed by hypervisor; closest supported model will be used If I review the qemu log for that particular domain, I see that my CPU has been changed to this: -cpu kvm64,+lahf_lm,+popcnt,+sse4.2,+sse4.1,+ssse3 (in other places, I see it set to core2duo rather than kvm64) However, it *should* be Nehalem. For some background, I'm running kvm on a westmere proc, which is the successor to Nehalem. I'm specifying Nehalem as the target platform, though, to make it easier to migrate to another server if necessary. I do have this same problem if I set this to Westmere, though, so it's not unique to Nehalem. As for support and capabilities, libvirt correctly detects my host CPU as Westmere: $ virsh capabilities | grep model <model>Westmere</model> qemu-kvm does (as far as I can tell) support Nehalem: $ qemu-kvm -cpu ?model | grep Nehalem x86 Nehalem Intel Core i7 9xx (Nehalem Class Core i7) Nehalem is defined in qmeu's target-x86_64.conf: grep Nehalem /etc/qemu/target-x86_64.conf name = "Nehalem" model_id = "Intel Core i7 9xx (Nehalem Class Core i7)" And if I run a cpu check on the processor, it seems to work fine: $ qemu-kvm -cpu Nehalem,check VNC server running on `127.0.0.1:5900' So, I I'm creating the new domain as a virt-install with the qemu-kvm backend as follows: virt-install --name=test --ram=1024 --arch=x86_64 --vcpus=2 --cpu=Nehalem --virt-type=kvm <SNIP> This results in the following cpu configuration: <cpu mode='custom' match='exact'> <model fallback='allow'>Nehalem</model> </cpu> But then, when I start this domain, I get the error message posted above. Any ideas what's going on here? I'm at a loss, and unfortunately I don't have much experience with kvm/libvirt just yet so I don't know what I should be focusing on for troubleshooting. Would appreciate any suggestions or guidance. Thanks. -- Jared

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[libvirt-users] duplicate domain ids!?
by matt cowan 20 Jul '12

20 Jul '12

Somehow I've ended up with duplicate domids. domid=15 name=node14 (names sanitized) # virsh list --all Id Name State ---------------------------------------------------- 1 node1 running 2 node2 running 3 node3 running 5 node4 running 6 node5 running 7 node6 running 8 node7 running 9 node8 running 10 node9 running 11 node10 running 12 node11 running 13 node12 running 14 node13 running 15 node14 running 15 node14 running 16 node16 running node15 is up and running, can ssh into it. virt manager only lists 15 guests (ie, doesn't show the duplicate domid) # virsh domid node14 15 # virsh domid node15 15 Doesn't *seem* to be causing a problem (other than above virsh/virt-manager issues), but this shouldn't happen right? Any potential for screwiness I should be concerned about? I was actually checking that node15 (a test system we don't need running at the moment) wasn't running when I noticed this; now I'm tempted to just leave it be until a maintenance period when node14 (production db server) can afford potential downtime, at which point I'd try 'shutdown -h now' within node14 and then 'virsh shutdown node15; virsh start node14'? node15 has been up for 9 days, other nodes for 50 days, so guess it's been like this for 9 days. hrm... yum.log also shows libvirt-client and libvirt-python were both updated 9 days ago. suggestions? thanks. -matt Scientific Linux release 6.2 (Carbon) 2.6.32-220.17.1.el6.x86_64 qemu-kvm-0.12.1.2-2.209.el6_2.4.x86_64 libvirt-0.9.10-21.el6.x86_64 libvirt-client-0.9.10-21.el6.x86_64 libvirt-python-0.9.10-21.el6.x86_64 virt-manager-0.9.0-7.el6.x86_64 python-virtinst-0.600.0-5.el6.noarch

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[libvirt-users] Virsh Failing to Snapshot VMWare VM with Multiple Disks
by Elizabeth Griffith 20 Jul '12

20 Jul '12

I am trying to use virsh's snapshot-create command on a VMWare vm that has multiple disks in its device list, but the command is failing with the error: "Could not create snapshot: FileNotFound - file [pool] filename.vmx". However, this command works if my vm only has one disk in its device list. I am using libvirt 0.9.10, and the storage pool is nfs mounted between the machine that I am running virsh on and the hypervisor. Can anyone tell me what I am doing wrong or if this is even supported by virsh? Thanks.

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[libvirt-users] Matching host and guest CPU
by Alex 19 Jul '12

19 Jul '12

Hi, I have an fc17 server with an Opteron 6128 with a few fc17/16 guests. How can I be sure I'm best matching the guest CPU with that of the server? I've used virt-manager to create the guests, and it currently shows the processor is a "Phenom(tm) 9550 Quad-Core": processor : 1 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9550 Quad-Core Processor stepping : 3 microcode : 0x1000065 cpu MHz : 2000.138 cache size : 512 KB fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt pdpe1gb lm rep_good nopl extd_apicid pni cx16 popcnt hypervisor lahf_lm cmp_legacy svm cr8_legacy abm sse4a misalignsse 3dnowprefetch npt bogomips : 4000.27 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: The guests seem to run very slowly, and just wondered if this may be the cause. Can someone recommend some basic optimizations I may already be missing from my guest config? <domain type='kvm'> <name>boxtech-new</name> <uuid>66887405-a34b-2ec2-1d6c-308aafb1f32e</uuid> <memory>2097152</memory> <currentMemory>2097152</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu match='exact'> <model>Opteron_G3</model> <vendor>AMD</vendor> <feature policy='require' name='skinit'/> <feature policy='require' name='vme'/> <feature policy='require' name='mmxext'/> <feature policy='require' name='fxsr_opt'/> <feature policy='require' name='cr8legacy'/> <feature policy='require' name='ht'/> <feature policy='require' name='3dnowprefetch'/> <feature policy='require' name='3dnowext'/> <feature policy='require' name='wdt'/> <feature policy='require' name='extapic'/> <feature policy='require' name='pdpe1gb'/> <feature policy='require' name='osvw'/> <feature policy='require' name='cmp_legacy'/> <feature policy='require' name='3dnow'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/boxtech-new.img'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' 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:bc:55:64'/> <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='tablet' bus='usb'/> <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='0x06' function='0x0'/> </memballoon> </devices> </domain> Thanks, Alex

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[libvirt-users] virsh define function question
by zhanggp 19 Jul '12

19 Jul '12

Hi, How do I view the libvirt virsh domxml-to-native function implementation? I think this function contains some error. Because we use libvirt to manage some host and vms on vmware hypervisor. We use openenbula generate a template for libvirt ,such as my attachment windows2008.xml. but when i use domxml-to-native to convert xml file to vmware config file vmx as below. This may not be accurate. For example: 1. guestOs type : could I config this parameter in xml file ,so after domxml-to-native to vmware.vmx , guestOS in my vmx file is "windows7srv-64 ". And also my pciBridge disappeared ! So could someone help me and tell us about 'virsh-c the esx :/ /@host?no_verify=1 define windows2008.xml' function realization。 Thanks all! virsh # domxml-to-native vmware-vmx windows2008.xml .encoding = "UTF-8" config.version = "8" virtualHW.version = "7" guestOS = "other-64" uuid.bios = "42 11 25 27 fd b6 7b 6d-72 3f 75 c6 25 fe ef 3e" displayName = "windows2008" memsize = "2048" numvcpus = "2" sched.cpu.shares = "normal" ide0:0.present = "true" ide0:0.deviceType = "ata-hardDisk" ide0:0.fileName = "/vmfs/volumes/349969f9-070dee8d/./windows2008.vmdk" floppy0.present = "false" floppy1.present = "false" ethernet0.present = "true" ethernet0.virtualDev = "e1000" ethernet0.networkName = "VM Network" ethernet0.connectionType = "bridged" ethernet0.addressType = "vpx" ethernet0.generatedAddress = "00:50:56:91:00:07" svga.vramSize = "8388608" zhanggp --------------------------------------------------------------------------------------------------- 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] Questions related to the snapshot
by lin tan 19 Jul '12

19 Jul '12

Hi, I faced two problems with the snapshot: First issue, I can use the snapshot functions via the virsh correctly such as snapshot-list. And when I removed the snapshot XML files from /var/lib/libvirt/qemu/snapshot/**/, I don't see the snapshot of the Virtual Machine any more. That's correct. But after I copying the XML files back, I can't see the the snapshot as well. Only if I restart my laptop can I see them. However, restarting is what I want to avoid. Because I wish I could utilize the functions in a server in the future. Does anyone have ideas about this, Did I do something wrong or it's a limitation. So far, I am using the qemu-img command to check the snapshot and do the revert without restarting my laptop. Because the snapshots are already embedded in the img file. Second issue, I find if I create the XML file of snapshot by using getXMLDesc and output to a new file in python, there is a slightly different. But, the new XML file can't be recognized even if I restart my laptop. The new XML file miss the attribute <active> as far as I can see, is it so important? Here is one example: The original XML in the default folder: <domainsnapshot> <name>Ex</name> <description>Snapshot of OS updates</description> <state>running</state> <parent> <name>1342427860</name> </parent> <creationTime>1342428835</creationTime> <domain> <uuid>2c853de2-6bba-ad26-bf05-0045e5f1beb9</uuid> </domain> <active>0</active> </domainsnapshot> The new XML file I created: <domainsnapshot> <name>Ex</name> <description>Snapshot of OS updates</description> <state>running</state> <parent> <name>1342427860</name> </parent> <creationTime>1342428835</creationTime> <domain> <uuid>2c853de2-6bba-ad26-bf05-0045e5f1beb9</uuid> </domain> </domainsnapshot> Thank you so much. Best Regards Tan

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[libvirt-users] save / restore RAM state - Problem
by Evaggelos Balaskas 19 Jul '12

19 Jul '12

Hi all, i am trying (test) to save / restore a state of a winxp virtual machine. Perhaps i am missing that i can not restore save image to LVM partition. "error: Failed to read file '/root/winxp.save': Value too large for defined data type" Below are my settings libvirt 0.9.13 qemu-kvm 1.1.1 # virsh Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list Id Name State ---------------------------------------------------- 3 winxp running virsh # save winxp /root/winxp.save Domain winxp saved to /root/winxp.save virsh # list Id Name State ---------------------------------------------------- virsh # list --all Id Name State ---------------------------------------------------- - winxp shut off virsh # restore winxp /root/winxp.save error: Failed to read file '/root/winxp.save': Value too large for defined data type # du -h /root/winxp.save 278M /root/winxp.save # virsh dumpxml winxp | more <domain type='kvm'> <name>winxp</name> <uuid>b528a71f-aca1-5024-c460-892100b97ef2</uuid> <memory unit='KiB'>1597440</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='pc-1.1'>hvm</type> <boot dev='hd'/> </os> --- Logical volume --- LV Path /dev/vg01/winxp LV Name winxp VG Name vg01 LV UUID hrXdl6-oRMC-dl7l-mkad-SSDl-y1hf-1Q1MPp LV Write Access read/write LV Creation host, time mywork, 2012-03-16 10:54:08 +0200 LV Status available # open 0 LV Size 5.00 GiB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 254:4 -- Evaggelos Balaskas - Unix System Engineer http://gr.linkedin.com/in/evaggelosbalaskas

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[libvirt-users] I can't virt-clone into an existing LVM now (ERROR: clone onto existing storage volume is not supported:) - i could in previous lbvirt versions? (deployment scripts no longer work...)
by Morgan Cox 18 Jul '12

18 Jul '12

Hi To deploy KVM vms I use a KVM template + script - which is cloned, then cloned again and resized - using virt-resize. i.e ---------------------------------------------------- virt-clone --original debian6template-DONTSTART --name NAME.test -f /dev/vgpool/NAME.test virsh vol-create-as vgpool NAME 8G virt-clone --original NAME.test --name NAME -f /dev/vgpool/NAME virt-resize --expand /dev/sda1 /dev/vgpool/NAME.test /dev/vgpool/NAME ---------------------------------------------------- The reason I clone twice is because I know that virt-clone does things to prep it for a new install, also the whole point was to be able to specify a size to be clone into (hence the use of virt-resize) This worked fine on our Ubuntu 11.10 server, however in Ubuntu 12.04 when I try to do the same I get the error 'ERROR Clone onto existing storage volume is not supported: '/dev/vgpool/test' If I can't virt-clone into an existing LVM I know I can clone once - then resize with LVM, then virt-resize into the partition (then virt-sysprep) - however the issue with that is that it is far more fiddly to mange... Previously could just make a 20GB partition and use virt-resize to expand into - using the above method I would have to increase the LVM to the value I want minus the size of the template.. i.e I have to specify - the amount to increase by, rather than the final size I want.... The templates also change size (when I update them, etc) which would mean re-writting the script after every update. Is there a way I can re-enable being able to virt-clone to an existing LVM partition ? As mentioned it works 100% fine in Ubuntu 10.04 Regards

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[libvirt-users] virDomainMemoryStats call
by Parakkal, Navin S 18 Jul '12

18 Jul '12

Hi, I'm using the API virDomainMemoryStats to fetch memory stats for a domain/guest on Fedora 16/RHEL 6.3 . I don't get these counters filled up VIR_DOMAIN_MEMORY_STAT_UNUSED, VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON,VIR_DOMAIN_MEMORY_STAT_AVAILABLE , VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT and VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT. The version of libvirt 0.9.11 on Fedora 16 . How to get all the counters filled up ? Should I take a specific version of qemu or should I do some config settings so that these values are filled up ? P.S. Please copy me in reply Regards, Navin Parakkal HP Software

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[libvirt-users] Attaching usb devices
by Mauricio Tavares 18 Jul '12

18 Jul '12

Is the only way to attach a usb device to a vm first specifying the device, <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x3080'/> <product id='0x1234'/> </source> </hostdev> and then booting the vm while the device is attached? Can't I attach/detach a USB device to the vm later? I did try the method suggested in http://david.wragg.org/blog/2009/03/usb-pass-through-with-libvirt-and-kvm.h… but did not have much luck. Also, can anyone explain me what happened in this log excerpt: husb: open device 1.18 husb: grabbed usb device 1.18 husb: config #1 need 1 husb: 1 interfaces claimed for configuration 1 husb: device 1.18 disconnected

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