October 2011 - Users - libvirt List Archives

[libvirt-users] virsh list not working with xen 4
by Rogério Vinhal Nunes 21 Sep '12

21 Sep '12

Hi, I'm having some trouble to get libvirt to show the correct power state of my virtual machines. I'm using Ubuntu 10.04 + Xen 4.1.1 + libvirt 0.8.8. virsh list --all only shows turned off machines registered in xend. If I turn them on, they just "disappear", and when I start machines directly from xml, they just doesn't appear at all. Libvirt is correctly connecting to xen as I can use the other commands fine, just the list option doesn't seem to work at all. What can I do to change that? # virsh version Compiled against library: libvir 0.8.8 Using library: libvir 0.8.8 Using API: Xen 3.0.1 Running hypervisor: Xen 4.1.0

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[libvirt-users] converting save/dump output into physical memory image
by Andrew Tappert 04 Jun '12

04 Jun '12

A lot of people in the security community, myself included, are interested in memory forensics these days. Virtualization is a natural fit with memory forensics because it allows one to get access to a guest's memory without having to introduce any extra software into the guest or otherwise interfere with it. Incident responders are particularly interested in getting memory dumps from systems they're investigating. Virsh has "save" and "dump" commands for storing the state of a guest to a file on disk, but memory of KVM guests doesn't get saved in the "standard" input format for memory forensics tools, which is a raw physical memory image. (This is what you'd get via the classical "dd /dev/mem" approach or the contemporary equivalent using the crash driver; and VMware Server and Workstation produce .vmem files, which are such raw physical memory images, when a guest is paused or snapshotted.) In order to analyze the memory of Libvirt/KVM guests with my Linux memory forensics software, Second Look, I've created a tool for converting Libvirt-QEMU-save files (output of virsh save command) or QEMU-savevm files (output of virsh dump command) to raw physical memory images. I've got a basic working capability, though I'm still tracking down some problems with a guest allocated 8GB RAM--not all the memory seems to be present in the save or dump file. And I haven't tested very extensively yet, version support is limited to what I myself am currently running, etc. I'd like to know if this is a capability that others are interested in. Is this something that would be of interest to the Libvirt project if I were to contribute the code, or to the KVM project, or do you think it best exists as a separate project? I've also got a proof-of-concept tool for converting hibernate images to raw physical memory images. Perhaps a collection of tools for converting various memory dump formats would be a good project. Anyone else interested in this kind of stuff? As an author of commercial memory forensics software I've got a vested interest in availability of good memory acquisition capabilities. But there are a number of people working on FOSS Linux memory analysis tools, too... Andrew

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Re: [libvirt-users] ruby-libvirt 0.4.0
by Chris Lalancette 09 Nov '11

09 Nov '11

On 07/29/11 - 09:34:17AM, David M. Barlieb wrote: > Hi, I'm fairly new to using libvirt. I have RHEL6 servers running KVM > virtual environment. As I understand it, libvirt provides the tools to > the KVM environment so that I can create domains or virtual guests. So, > that being said, what does this ruby-libvirt provide me or enhance given > my current setup. > > > > I'll understabnd if this is a little rudimentary but I really do not > know who or where else to ask these types of question. I get quite a bit > of email from the libvirt-users groups about libvirt and really have no > idea if I can or should put any of these into my current setup, or if I > should be asking RedHat this. > > > > I certainly wouldn't mind testing and contributing to these effort to > enhance the libvirt tools and KVM hypervisor but think I need a better > understanding of exactly how libvirt and KVM interact and what the > enhancements bring to the table. In the future it is usually best to keep one of the lists on an email; that way, if I'm away or not responding, someone else can help you. I've added libvirt-users to this response. In any case, you have the right idea. Libvirt is a control plane for various different virtualization solutions. Arguably the most popular virtualization solution that libvirt can control is KVM, but it can also manage Xen, VMware ESX, LXC (linux containers), UML, etc. Libvirt provides both tools (like virsh and libvirtd) and APIs for interacting with virtual machines. The APIs are things like virDomainShutdown(), virDomainReboot(), etc. The ruby-libvirt package is a thin wrapper around these APIs, so that you can use this functionality from ruby programs. That is, you would be able to do something like: dom.reboot dom.shutdown from your ruby programs. There are also bindings for other languages such as python, php, and perl. There is a lot more information at http://libvirt.org, and there is more information specifically about the ruby bindings at http://libvirt.org/ruby -- Chris Lalancette

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[libvirt-users] no connection driver available for openvz:///system
by 张立洪 05 Nov '11

05 Nov '11

dears. I can not solved the problem: vzctl works. But how do I connect to Virtuozzo? Using the openvz >> > driver >> > it doesn't work out of the box: >> > virsh # connect openvz:///system >> > error: Failed to connect to the hypervisor >> > error: no connection driver available for openvz:///system Why can not I connect to the openvz??? please help me , thanks.

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[libvirt-users] Hard limit for the cpu usage of a VM
by sethuraman subbiah 01 Nov '11

01 Nov '11

Hi , I was previously using xen and currently moved to KVM. I am using libvirt to manage these VMs. In den's credit scheduler , I had the ability to set a cap on the cpu usage for a VM. But I was not able to find a similar substitute in KVM. I find that we can use cgroups to provide shares for VM but that will be more like weight based and it doesn't set a hard cap for that VM. I tried using cpulimit but I find it inaccurate and we can give values only between 0-100. Thus, I think it cannot support multi core environments. Can any one suggest a method to set a hard limit on a VM's cpu usage? Thank you. - Regards, Sethuraman Subbiah Graduate Student - NC state University M.S in Computer Science

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[libvirt-users] [ruby-libvirt] who's using it
by Christian Parpart 31 Oct '11

31 Oct '11

Hey all, I would like to know who / what project is using this binding. So I could learn the API a bit easier than reading through the rough rdoc-based API documentation, which is not really helpful to me, as I do not know the C API yet either. my intention is, to some day, be able to create a Rails web app for managing libvirt hosts (mainly OpenVZ/vserver/LXC and possibly QEMU). Thanks in advance, Christian Parpart.

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[libvirt-users] VM with transient disk
by Till Mossakowski 31 Oct '11

31 Oct '11

I want to use transient disks with libvirt. According to [1], the transient disk feature has been supported since 0.9.5. Hence, I have installed libvirt 0.9.6 for Ubuntu Lucid from [2] and used the following disk configuration: <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/home/till/test.img'/> <target dev='vda' bus='virtio'/> <transient/> </disk> However, I get: unsupported configuration: transient disks not supported yet Best, Till [1] http://libvirt.org/formatdomain.html [2] http://ppa.launchpad.net/agent-8131/xen-custom/ubuntu/

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[libvirt-users] How to collect the VM bandwidth usage utilization
by vmnode guy 29 Oct '11

29 Oct '11

Hi Guy, I am trying to figure out how & where can i get the bandwidth usage utilization statistic info for all the VM, so in the end i will be able to use it for metering purpose.. Anyone got any idea ? Regards, Peter

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[libvirt-users] live migration error without shared storage
by Luengffy XUE 28 Oct '11

28 Oct '11

command: virsh migrate --live --copy-storage-all vm qemu+ssh://destinationHost/system error : unexpected failure PS log file in the jpg

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[libvirt-users] libvirt-php - API libvirt_domain_suspend() problem, doesn't work
by vmnode guy 28 Oct '11

28 Oct '11

Hi Guys, I was trying to suspend a virtual machine but fail not sure why.... However i was successfully list all the vm on the host, below are my source code, can any one who have experience in this area give me some advised ? *My OUTPUT from browser* Array ( [libvirt.release] => 3 [libvirt.minor] => 9 [libvirt.major] => 0 [connector.version] => 0.4.3 [connector.major] => 0 [connector.minor] => 4 [connector.release] => 3 ) Resource id #2Array ( [0] => VM_6E472D93-F943-2D1E-B1EA-5896D95B9C84 [1] => VM_B090CFCA-77FE-962B-9D06-F85047324527 [2] => VM_7478E5EB-B843-225A-00FC-09D0E846FE61 [3] => winxpnew [4] => VM_1F9BC5A1-352D-0E7D-8BAB-F46FBFE1C80D [5] => VM_B6DA1C45-3F0D-16EF-FDF1-512935D88C37 [6] => VM_F32717EE-4AA4-A17C-8E4B-D1D5A79612A5 [7] => VM_03ABB818-D226-32FB-0A6E-458849AB7C7B [8] => nagios [9] => VM_6C158DB3-71BE-A0D1-3FFB-1EEE5854E45D [10] => VM_8D560513-036A-14FD-7546-48C370F0A057 [11] => VM_AA3DC5CA-A447-E6E5-0E7A-869416869B1D [12] => VM_C19AC7F1-AA49-92D0-336F-B8A8D7FADCD5 ) *Below are my php source : -* <?php echo "<html><body><pre>"; print_r ( libvirt_version() ); $conn = libvirt_connect('qemu+ssh://root@10.0.0.122/system', true); echo $conn; $doms = libvirt_list_domains($conn); print_r($doms); $doms = libvirt_domain_suspend('VM_7478E5EB-B843-225A-00FC-09D0E846FE61'); print_r($doms); echo "</pre></body></html>"; ?> Thanks!! Regards, Peter

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[libvirt-users] Live migration with 2 nodes and no SAN
by Trey Dockendorf 28 Oct '11

28 Oct '11

I'd like to begin using live migrations with my KVM install, but I do not have any shared storage. I will have 2 identical nodes, with their own local storage. Everything I've read seems to point to DRDB, but I am not finding many resources on how to implement DRDB + qcow2 + KVM. Currently I've been using virt-manager to manage my VMs which are all using qcow2 images. With a setup using DRDB, if I mount the replicated device to /var/lib/libvirt/images, what ensures that each virtual disk is only being used by a single node until migration is needed? I have no experience with HA systems or services. What suggestions or experiences has anyone had with this type of setup? Any advice is welcome. Thanks - Trey

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[libvirt-users] delete lvm problem: exited with non-zero status 5 and signal 0
by lingjiao.lc 27 Oct '11

27 Oct '11

hi, I use the libvirt-python to manage my virtual machine. When I delete a volume use vol.delete(0), sometimes it note me that has occur the error: libvirtError: internal error '/sbin/lvremove -f /dev/vg.vmms/lvm-v097222.sqa.cm4' exited with non-zero status 5 and signal 0: Can't remove open logical volume "lvm-v097222.sqa.cm4". then I go to the host and run the command: " sudo lvchange -a n /dev/vg.vmms/lvm-v097222.sqa.cm4" and then the volume could delete use vol.delete(0). But it's not often occur, just once in nearly 8. I know the delete function virStorageBackendLogicalDeleteVol as this: { { const char *cmdargv[] = { LVREMOVE, "-f",vol->target.path, NULL }; virCheckFlags(0, -1); virFileWaitForDevices(); if (virRun(cmdargv, NULL) < 0) return -1; return 0; } Could I change it like this: ? if (virRun(cmdargv, NULL) < 0) const char *changeCmdarg[] = { LVCHANGE, "-a", "n", vol->target.path, NULL }; if(virRun(changeCmdarg, NULL) < 0) return -1; else if(virRun(cmdargv,NULL) < 0) return -1; ________________________________ 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] Need help to compile libvirt-php
by vmnode guy 27 Oct '11

27 Oct '11

Hi guys, I try to compile the libvirt-php but no luck, below are the output i got.. webserver:~/libvirt-php-0.4.3 # ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking for style of include used by make... GNU checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking dependency style of gcc... none checking for virConnectOpen in -lvirt... yes checking dependency style of gcc... (cached) none checking whether to disable maintainer-specific portions of Makefiles... yes checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking dependency style of gcc... (cached) none checking for a sed that does not truncate output... /usr/bin/sed checking for gawk... (cached) gawk checking for echo... echo checking for rm... rm checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for LIBXML... yes checking for xsltproc... /usr/bin/xsltproc checking for xmllint... /usr/bin/xmllint checking for xmlcatalog... /usr/bin/xmlcatalog checking for php-config... no *configure: error: php-config not found; please install the PHP SDK* webserver:~/libvirt-php-0.4.3 # ls /etc/php5/ apache2/ cli/ conf.d/ webserver:~/libvirt-php-0.4.3 # ls /etc/php5/apache2/ php.ini webserver:~/libvirt-php-0.4.3 # Regards, Peter

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[libvirt-users] live migration without shared storage problems.
by Luengffy XUE 27 Oct '11

27 Oct '11

Hi, all I migrate a vm from source host to the destination host. I am sure every part is ok for migration. 1 Create the image in the destination and change the user and group. 2 Open TCP socket in the destination host. and I migrate in the source host command line. $ virsh migrate --live --copy-storage-all vmubuntu qemu+ssh://destinationHost/system --verbose But I get the error "error: operation failed : failed to retrieve chardev info inqemu with 'info chardev'" In the destination I find in the vmubuntu.log The error is "Migration failed. Exit code tcp:0.0.0.0:49170(-98),exiting." What can I do to solve it ? I do not understand how the error comes. Anyone can help me ? Thanks in advance.

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[libvirt-users] Start of libvirtd fails with error "undefined symbol: __virAlloc"
by Langenbach, Steffen 26 Oct '11

26 Oct '11

Hello List like described in the topic I have a problem with starting the libvirtd. I'm a complete newbie with libvirtd, today I heard the first time that such a daemon exists after I get the message that our webserver isn't running (a former colleague has installed this system). We have the following configuration: A Ubuntu based host on which our webserver runs within a qemu virtual machine. The following happens: Yesterday the host restarted (at the moment we don't know the reason) and since this restart libvirtd did not start up. How I found that out: When I try to start the virtual machine with "virsh start z-web" I get the error: "Connecting to uri: qemu:///session libvir: Remote error : unable to connect to '/var/run/libvirt/libvirt-sock': No such file or directory error: failed to connect to the hypervisor" As explained, I'm a total Newbie with libvirtd. So as far as I know, the libvirt-sock is generated by libvirtd when it's running. I don't know the right way how to start libvirtd. I tried it by just typing "libvirtd", but that generates this error: "libvirtd: symbol lookup error: libvirtd: undefined symbol: __virAlloc". I can't find any log-entry that gives me more information about this error. Does anybody can help me with this problem? In which logfiles does libvirtd normaly writes such errormessages? Or what can the problem be? If you need more information about the configuration or something else, I can find that out, if you tell me where ;) Thanks alot for your help! Kind regards, Steffen ________________________________ Steffen Langenbach IT-Administration Tel: +49 6151 50031-66 Fax: +49 6151 50031-40 Steffen.Langenbach(a)mechatronic.de [http://www.mechatronic.de/fileadmin/gfx/mechatronic_mail.jpg] ________________________________ Mechatronic AG • Wittichstraße 2, 64295 Darmstadt; DE • Tel +49 6151 50031-66 • Fax +49 6151 50031-40 ________________________________ Diese E-Mail enthält vertrauliche Informationen. Wenn Sie diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Die Anfertigung unerlaubter Kopien, die Weitergabe der Information sowie die unbefugte Weitersendung der E-Mail ist nicht gestattet. This e-mail contains confidential information. If you wrongly received this e-mail, please inform the sender immediately and delete this e-mail. Unauthorised copying, disclosure or distribution of this e-mail is strictly forbidden. Amtsgericht: Darmstadt, Sitz: Darmstadt, HRB 9437 Vorstand: Thomas Ullmann (Vors./CEO) Vorsitzender des Aufsichtsrats: Dr. Alexander Geilert

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[libvirt-users] how to setup libvirt with java bindings for use
by Dan Hirsch 26 Oct '11

26 Oct '11

Hi, I would like to use libvirt to manipulate virtual machines of different types (KVM, ESXi etc.) I added dependencies to my project the libvirt and jna jars. trying to execute your example code I am getting a run time exception saying the library cann't be found. it an actual libvirt c library is also required, and needs to be compiled separately? can you please write down all needed steps for using libvirt with java binding? thanks in advance.

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Re: [libvirt-users] virsh start VM failed
by Eric Blake 26 Oct '11

26 Oct '11

[re-adding the list] On 10/26/2011 09:37 AM, 邱敏鈴 wrote: > linux distribution : linux2.6.35-30-server version : ubuntu10.10 > > virsh # version > Compiled against library: libvir 0.8.3 > Using library: libvir 0.8.3 > Using API: QEMU 0.8.3 > Running hypervisor: QEMU 0.12.5 > > /var/log/libvirt/qemu/controlnode.log > 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-0.12 -enable-kvm -m 1024 -smp > 2,sockets=2,cores=1,threads=1 -name controlnode -uuid > ce48e7d5-de02-8faf-c829-9e000ca49b2b -nodefaults -chardev > socket,id=monitor,path=/var/lib/libvirt/qemu/controlnode.monitor,server,nowait > -mon chardev=monitor,mode=readline -rtc base=utc -boot c -drive > file=/vm/vm1/ubuntu-kvm/tmpkzLes0.qcow2,if=none,id=drive-ide0-0-0,boot=on,format=qcow2 > -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -device > virtio-net-pci,vlan=0,id=net0,mac=52:54:00:17:a2:d0,bus=pci.0,addr=0x3 -net > tap,fd=37,vlan=0,name=hostnet0 -usb -vnc 127.0.0.1:0 -vga cirrus -device > virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 > bind(unix:/var/lib/libvirt/qemu/controlnode.monitor): Permission denied > chardev: opening backend "socket" failed This part of the log looks suspicious. Could this be an installation issue, or perhaps AppArmor not configured correctly? > > virsh # dumpxml controlnode > <domain type='kvm'> > <name>controlnode</name> > <uuid>ce48e7d5-de02-8faf-c829-9e000ca49b2b</uuid> > <memory>1048576</memory> > <currentMemory>1048576</currentMemory> > <vcpu>2</vcpu> > <os> > <type arch='x86_64' machine='pc-0.12'>hvm</type> > <boot dev='hd'/> > </os> > <features> > <acpi/> > </features> > <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='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/vm/vm1/ubuntu-kvm/tmpkzLes0.qcow2'/> > <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='52:54:00:17:a2:d0'/> > <source bridge='br0'/> > <target dev='vnet0'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/> > <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='0x04' > function='0x0'/> > </memballoon> > </devices> > </domain> > > virsh # managedsave-remove controlnode couldn't help! Nothing in that XML jumped out as suspicious to me. And from the sound of your managedsave-remote not making a difference, my guess of a corrupt managed save image getting in the way is a red herring. I'm not sure what to suggest trying next. Maybe others can chime in... -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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[libvirt-users] virsh start VM failed
by 邱敏鈴 26 Oct '11

26 Oct '11

Dear, I encountered some problems when I used the virsh to start my virtual machines. I had tried some ways but I still couldn't solve it. Please help me, thanks. error messages : virsh # start controlnode error: Failed to start domain controlnode error: internal error process exited while connecting to monitor: bind(unix:/var/lib/libvirt/qemu/controlnode.monitor): Permission denied chardev: opening backend "socket" failed

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[libvirt-users] How to use "virsh migrat" with p2p option?
by Guangya Liu 25 Oct '11

25 Oct '11

Hi libvirt support, Can you please give me some example of how to use "virsh migrate --live" with p2p option including both source host and target host? I try to get some info from your website, but no info with migrate. [root@vmoactive02 qemu]# virsh help migrate NAME migrate - migrate domain to another host SYNOPSIS migrate [--live] [--p2p] [--direct] [--tunnelled] [--persistent] [--undefinesource] [--suspend] [--copy-storage-all] [--copy-storage-inc] <domain> <desturi> [<migrateuri>] [<dname>] DESCRIPTION Migrate domain to another host. Add --live for live migration. OPTIONS --live live migration --p2p peer-2-peer migration --direct direct migration --tunnelled tunnelled migration --persistent persist VM on destination --undefinesource undefine VM on source --suspend do not restart the domain on the destination host --copy-storage-all migration with non-shared storage with full disk copy --copy-storage-inc migration with non-shared storage with incremental copy (same base image shared between source and destination) [--domain] <string> domain name, id or uuid [--desturi] <string> connection URI of the destination host [--migrateuri] <string> migration URI, usually can be omitted [--dname] <string> rename to new name during migration (if supported) Thanks, Guangya

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[libvirt-users] Fwd: Re: Unable to acquire lock
by Trey Dockendorf 24 Oct '11

24 Oct '11

Accidentally sent to OP only. This has been with 0.8.7 on CentOS 6 CR that Ive had the problem. ---------- Forwarded message ---------- From: "Trey Dockendorf" <treydock(a)gmail.com> Date: Oct 24, 2011 12:31 AM Subject: Re: [libvirt-users] Unable to acquire lock To: "Jatin Kumar" <cs5090243(a)cse.iitd.ernet.in> On Mon, Oct 24, 2011 at 12:05 AM, Jatin Kumar <cs5090243(a)cse.iitd.ernet.in>wrote: > Hello, > I am trying to execute virsh commands on a host but it is giving errors > due to failure in acquiring lock. > > root@kvm01:~# virsh suspend blindone > error: Failed to suspend domain blindone > error: Timed out during operation: cannot acquire state change lock > > Any suggestions how can we figure out possible reasons. > > -- > Jatin > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users > I've run into this a few times when a snapshot hangs. Unfortunately I can't offer much advice on why it happens, but increasing log verbosity may help troubleshoot it. These are the relevant lines I use in /etc/libvirt/libvirtd.conf log_level = 2 log_filters="2:remote 2:event" log_outputs="2:file:/var/log/libvirt/libvirtd.log" Be careful with level 1 alerts...I generated a 100GB text log in 3 days. To fix that problem and unlock a VM, you need to kill libvirt, remove the PID files and start libvirt # service libvirtd stop # rm -rfv /var/run/libvirt # service libvirtd start More information here, https://bugzilla.redhat.com/show_bug.cgi?id=676205 - Trey

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[libvirt-users] renaming a domain
by Roberto Attias (rattias) 24 Oct '11

24 Oct '11

Hello, In my system a VM with a given domain name is defined and started. At a certain point I will define and start a new VM, with a different name. I then want to dispose of the old VM and rename the new one to the old one. Unfortunately I didn't find any API to do the last step. Is it possible to change the domain name of a running VM? Thanks, Roberto

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[libvirt-users] Unable to acquire lock
by Jatin Kumar 24 Oct '11

24 Oct '11

Hello, I am trying to execute virsh commands on a host but it is giving errors due to failure in acquiring lock. root@kvm01:~# virsh suspend blindone error: Failed to suspend domain blindone error: Timed out during operation: cannot acquire state change lock Any suggestions how can we figure out possible reasons. -- Jatin

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[libvirt-users] Running LXC instance as a non-root user
by Dong-In David Kang 24 Oct '11

24 Oct '11

Hello, I'm new to this mailing list. I have a question on running an LXC instance from libvirt as a non-root user. I saw libvirt can launch a QEMU instance as a non-root user by editing /etc/libvirt/qemu.conf configuration file via the user=$USERNAME and group=$GROUPNAME parameters. But, I could not find such options for LXC. Is there a way to run an LXC instance as a non-root user? If it is not possible, then could I run libivrtd itself as a non-root user? Thanks, David. ---------------------- Dr. Dong-In "David" Kang Computer Scientist USC/ISI

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[libvirt-users] VirtualBox 4.1 support
by Stefano Facchini 24 Oct '11

24 Oct '11

Is version 4.1 (and later) of VirtualBox supported by libvirt? -- Stefano Facchini <stefano.facchini(a)gmail.com>

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[libvirt-users] virsh modified option... alternative..
by vmnode guy 24 Oct '11

24 Oct '11

Hi All, I am new to libvirt, i wander how we can achieve below objective, i read through a lot from libvirt.org but couldn't found any thing solid something equivalent to this:- virsh dumpxml dom > /tmp/dom.xml $EDITOR /tmp/dom.xml && virsh define /tmp/dom.xml What i try to achieve is to have one management server that install with libvirt in place then we can use libvirt to connect to other libvirt box to provision the vm-create, vm-delete & capable to vm-modified the CPU,MEM,HDD,boot sequence, vnc password attached & detech network card..on the targeted VM. Currently we do it through editing the xml file which was a bit pain to do so.. Regards, Peter

2 1

[libvirt-users] high-privileges
by Face 23 Oct '11

23 Oct '11

hello all, my vm (windows server 2008) keep crashing? 2011-09-21 15:00:45.924: 1355: info : libvirt version: 0.9.6 2011-09-21 15:00:45.924: 1355: error : virSysinfoRead:465 : internal error Failed to find path for dmidecode binary 2011-09-21 15:05:43.873: 1349: warning : qemuDomainObjTaint:1128 : Domain id=1 name='IIS' uuid=a02e41a9-9f4d-d94f-43a6-995b1ca6d37d is tainted: high-privileges 2011-09-21 16:07:10.593: 1344: error : qemuMonitorIO:541 : internal error End of file from monitor Any help would be much appreciated. -- Sincerely, falazemi

3 4

[libvirt-users] virt-install with set vnc password
by vmnode guy 22 Oct '11

22 Oct '11

Hi Guy, Anyone know how we can set up the vnc password during using virt-install command ? # virt-install \ --connect qemu:///system \ --name demo \ --ram 500 \ --disk path=/var/lib/libvirt/images/demo.img,size=5 \ --network network=default,model=virtio \ --vnc \ --cdrom /dev/cdrom Regards, Peter

2 5

[libvirt-users] Libvirt Live Migrat error
by Luengffy XUE 21 Oct '11

21 Oct '11

Dear , Today， i use the libvirt-manager to migrate the live VM . Problem comes ad the picture. How did it happen? Please help me. Thanks very much. Leungffy XUE

2 1

[libvirt-users] Identifying proper CPU type
by Alex 20 Oct '11

20 Oct '11

Hi, I've been working on trying to figure out why my virtual machine keeps crashing when I don't believe I have a hardware problem, and I believe I might know why. As I'm relatively new to this, I believe I may have misconfigured the XML file to try and maximize the CPU features that are available to the guest from the host. I have an Intel Xeon E3-1240 3.3Ghz quad-core. How can I properly configure the XML file to transparently make available as many of the CPU features as possible to the guest? I have read cpu_map.xml, and my processor has more capabilities than anything listed. I've now configured the <cpu> section to read as follows: <cpu> <topology sockets='1' cores='4' threads='2'/> </cpu> The guest processor still seems to indicate there is only one core, despite there being 7 processors? Below is the cpuinfo from the host, followed by that of the guest: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 42 model name : Intel(R) Xeon(R) CPU E31240 @ 3.30GHz stepping : 7 cpu MHz : 3301.000 cache size : 8192 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 4 apicid : 7 initial apicid : 7 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips : 6584.20 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: Guest: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 2 model name : QEMU Virtual CPU version 0.14.0 stepping : 3 cpu MHz : 3292.520 cache size : 4096 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 4 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 ht syscall nx lm rep_good nopl pni cx16 popcnt hypervisor lahf_lm bogomips : 6585.04 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: Any ideas greatly appreciated. Thanks, Alex

2 2

[libvirt-users] general protection and other errors
by Alex 19 Oct '11

19 Oct '11

Hi, I'm having a problem with a fedora15 x86_64 host with a fedora15 x86_64 guest on a Xeon E3-1240 with 8GB RAM on the guest. This is the only guest. The server is configured as a mail server, using spamassassin, postfix, amavisd, and clamav. It was previously running without error on different hardware. I migrated the disks to a more powerful server due to load. It's a new server, and has been stress tested with memtest86, mprime, and passmark's Linux test for more than 24 hours without producing a problem. However, when I run the kvm vm, I receive a bunch of errors similar to these on the guest: [169245.360511] clamscan[27448] general protection ip:7f125f2e6ffb sp:7fff117566f0 error:0 in libclamav.so.6.1.11[7f125f229000+9ce000] [29016.445470] clamd[1110] general protection ip:30df2c3981 sp:7fffa08f4fe0 error:0 in libclamav.so.6.1 .11[30df200000+9ce000] There are other applications, such as pyzor, that produce similar errors. Is this something that could be a result of some software configuration error I've made? Is there something I can do to debug this further? There also aren't any errors on the host indicating a kernel problem or hardware issue. Is it possible this is a known error? I was previously trying to improve IO performance by using 'block' instead of 'file' for the device, but had to abandon that idea because it didn't work and I had to concentrate on this problem. Could disabling the cache (cache=none) cause this? I've included some info below, in hopes someone could guide me towards a solution. # rpm -qva|egrep 'kvm|libvirt|kernel|qemu' libvirt-python-0.8.8-7.fc15.x86_64 kernel-2.6.40.6-0.fc15.x86_64 qemu-img-0.14.0-8.fc15.x86_64 gpxe-roms-qemu-1.0.1-4.fc15.noarch kernel-2.6.40.4-5.fc15.x86_64 qemu-system-x86-0.14.0-8.fc15.x86_64 libvirt-0.8.8-7.fc15.x86_64 libvirt-client-0.8.8-7.fc15.x86_64 qemu-common-0.14.0-8.fc15.x86_64 kernel-headers-2.6.40.6-0.fc15.x86_64 qemu-kvm-0.14.0-8.fc15.x86_64 I've included my domain config below in hopes it helps. <domain type='kvm'> <name>mail02</name> <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid> <memory>6291456</memory> <currentMemory>6291456</currentMemory> <vcpu>4</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>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/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/var/lib/libvirt/images/mail02.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='52:54:00:67:2c:4c'/> <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'/> <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

1 0

Re: [libvirt-users] no connection driver available for openvz:///system
by Trey Dockendorf 18 Oct '11

18 Oct '11

2011/10/12 张立洪 <zlh_086(a)126.com> > thanks for help. > > I download a new libvirt 0.8.1,and compile libvirt.spec. and I success.I > can use virsh command connect openvz. > > but I want use libvirt manager KVM and openvz simultaneously.can you tell > me how can I implement.....? > openvz and kvm 's VMs can network interconnect? > the end I want to ask whether libvirt0.9.6 support openvz,vbox,lxc etc? > > thanks very much again!!!! look forward to your replies. > > > > > Replying back to the list as this may be useful for others. Personally, I don't know openvz or its capabilities, but you can use something like virt-manager to manage anything controlled by Libvirt. If the openvz server connects via libvirt then virt-manager should be able to manage that also. In virt-manager you'd just do "File" -> "Add Conection" to connect a new server to the same interface. I'd recommend also upgrading the CentOS 6 CR. The version of libvirt fixes many issues I've run into, primarily the snapshot capabilities. Also the virt-manager version in CentOS 6 is very dated. I have one you can download that is the latest I've found to work with libvirt-0.8.1 and libvirt-0.8.7 (CentOS 6.1 / CR). http://itscblog.tamu.edu/virt-manager-0-8-7-for-centos-6/ . I'll be updating the virt-manager RPM shortly, to just incorporate changes from upstream RedHat. - Trey

3 4

[libvirt-users] Virtio Balloon- Can not see the results
by d hee 18 Oct '11

18 Oct '11

with kvm and virtio- would -m 1024 take proceedence over -balloon virtio? when i use both together, i see memory stay around 1024 MB less on my host side. I know the guest is not taking but a fraction of that ram, so I would expect the virtio balloon to take the majority of the guests ram and hand it back to the host. this is using the free util/command to take snapshots of the host memory. thanks, -dman

2 3

[libvirt-users] Help with running virt-top from Java file
by PREETHI RAMESH 17 Oct '11

17 Oct '11

I've been trying to run virt-top to save the usage statistics to a csv file from my Java code using process builder. However, this gets executed in the Java file but I don't seem to find the file created anywhere. Is executing virt-top possible via a Java code? I'm using the example here<http://forums.devx.com/showthread.php?t=147403>replacing ls -l with virt-top --csv file2.csv. I plan to generate the graphs from the csv files to load them on to my Java UI. If there are other alternatives to my method, please tell me as I've been trying to get one for almost a week now. Thanks a lot! Preethi

1 0

[libvirt-users] libvirt ESXI driver's capabilities
by חץ בן חמו 17 Oct '11

17 Oct '11

Hello, I've read a bit about libvirt in the web site, and I couldn't find anywhere whats the VMWare driver is capable of. I'm planning to build something that will let me manage multiple ESXI hosts (without vcenter) and before I hire a developer, I would like to ask if it supports the following items: * creating thin provisioning disks (when creating a new vm for example) * snapshots - create / restore / limit amounts of snapshots * modifications of live machines (if possible) * graphs (is it possible to build graph with libvirt??) * shutdown / pause / restart I really wish there was a document which would show the driver's limitations.. Another question: is there any book / pdf which is updated and can provide the info of what libvirt capabilities are there and how to use them? Thanks, Hetz

1 0

[libvirt-users] virt-install.
by Chuck LaVerde 16 Oct '11

16 Oct '11

Why does virt-install shutdown the guest after the initial install? Is there a way to have the guest reboot after the initial installation? Chuck

1 0

[libvirt-users] XML file format for snapshot-create
by Trey Dockendorf 13 Oct '11

13 Oct '11

I've created a very basic snapshot XML file, to allow for a description of the snapshot. However when running the virsh command, it doesn't like the formatting. # virsh snapshot-create proxy_0 /vmstore/proxy_0/proxy_0_ss.xml error: XML description for failed to parse snapshot xml document is not well formed or invalid This are the XML file contents... # cat proxy_0_ss.xml <domainsnapshot> <name></name> <description>Before updating to CR repo</desciption> </domainsnapshot> I'm running libvirt-0.8.7 on CentOS 6 x86_64. I can take snapshots just fine without defining the XML file, but I'd like to be able to add a description. Thanks - Trey

3 4

[libvirt-users] BIOS Delay
by xuteng 13 Oct '11

13 Oct '11

Hi, Does the libvirt support the bios delay ? I mean that after set a special number of seconds or minutes, when the domain starts, the bios will delay after the time I set Thanks for your time wade xuteng via foxmail

2 2

[libvirt-users] Live Migration using Libvirt migrate()
by PREETHI RAMESH 12 Oct '11

12 Oct '11

Hi, This is a follow up of the mail regd migration I'd posted a few days ago. My scenario: I'm creating two virtual machines images from an Ubuntu 10.10 iso of RAM size 128 and 700 MB. Using the migrate() , I migrate it from the current physical machine to the destination machine via a 100 Mbps switch LAN connection. BOTH migrations take the same amount of time. Checking out the eth0's transmitted and received bytes after and before the migration, I find that there's NO change in the readings. Using any other method to migrate(virsh,Qemu) takes a substantial amount of time(close to 10 seconds) for the 128 and 700 MB images. How can this drastic change in migration time be accounted for? Are there any other ways to check if the VM has been successfully migrated to the destination(i tried using virsh console after migrate() but for some reason it just hangs. I tried out the suggested patches on various sites but to no avail)? Is pinging the migrated VM from its PM a sure test for successful migration? Thanks guys.

2 1

[libvirt-users] Performance tuning questions for mail server
by Alex 11 Oct '11

11 Oct '11

Hi, I have a fedora15 x86_64 host with one fedora15 guest running amavis+spamassassin+postfix and performance is horrible. The host is a quad-core E13240 with 16GB and 3 1TB Seagate ST31000524NS and all partitions are ext4. I've allocated 4 processors and 8GB of RAM to this guest. I really hoped someone could help me identify areas in which performance can be improved at both the guest and host. Load on the server is regularly above 20, yet the processors generally are idle and the host is still responsive. Should the concentration of the performance tuning be done on the guest or the host? I've read through the information at http://libvirt.org/formatdomain.html#elementsMemoryTuning but I don't know how the settings apply to my configuration and which ones apply to my hardware. I've included my libvirt xml config below. It was built using virt-manager on fedora15. There appears to be quite a few other options that are available and not provided by virt-manager that I would like to be able to use. I've done a little kernel tuning on the host, although it doesn't appear to have made much difference. Are there a set of values for kernel parameters that would be advisable to make for a mail server? Here is what I currently have: # sysctl -p net.ipv4.ip_forward = 1 net.ipv4.conf.default.rp_filter = 1 net.ipv4.conf.default.accept_source_route = 0 kernel.sysrq = 0 kernel.core_uses_pid = 1 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 net.ipv4.ip_forward = 1 net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.conf.all.log_martians = 0 net.ipv4.conf.default.log_martians = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.default.accept_redirects = 0 vm.vfs_cache_pressure = 35 vm.nr_hugepages = 512 net.ipv4.tcp_max_syn_backlog = 2048 fs.aio-max-nr = 1048576 vm.dirty_background_ratio = 3 vm.dirty_ratio = 40 After making changes, do you have any recommendations on which tools to use to monitor those changes and see how they perform? I have noatime set in fstab in the guest for the /var partition, where much of the spamassassin occurs. I've included below my libvirt xml config for the guest and hoped someone could make some recommendations on how to apply the cputune and memtune parameters to my system. <domain type='kvm'> <name>mail02</name> <uuid>ec4f3cf5-2f27-fb3e-72f6-3fa3176b13b6</uuid> <memory>8388608</memory> <currentMemory>8388608</currentMemory> <vcpu>8</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>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/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/mail02.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='52:54:00:67:2c:4c'/> <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'/> <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

5 17

Re: [libvirt-users] Libvirt newbie, need help with doubts
by Eric Blake 07 Oct '11

07 Oct '11

Forwarding to the list (this was mistakenly sent to just me) On 10/07/2011 11:32 AM, Mohammed Naser wrote: > On 2011-10-07, at 12:13 PM, Eric Blake<eblake(a)redhat.com> wrote: > >> On 10/07/2011 05:28 AM, PREETHI RAMESH wrote: >>> >>> 3. I'm developing an application in Java to monitor VM usage(Memory,CPU, >>> Network etc). Are there any easily integrable graph plotting applications I >>> could integrate with? >> >> Sorry, I can't answer this one. > > There is a plugin that collects resource details of libvirt for > collectd. I believe that collectd collects data in an RRD database and > I'm sure you can find an RRD charting library for Java. > >> >> -- >> Eric Blake eblake(a)redhat.com +1-801-349-2682 >> Libvirt virtualization library http://libvirt.org >> >> _______________________________________________ >> libvirt-users mailing list >> libvirt-users(a)redhat.com >> https://www.redhat.com/mailman/listinfo/libvirt-users > > Regards, > Mohammed Naser > > Sent from my iPhone -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

1 0

[libvirt-users] Libvirt newbie, need help with doubts
by PREETHI RAMESH 07 Oct '11

07 Oct '11

Hi, These are my doubts: 1. I tried live migration of Ubuntu 11.04 from the one physical machine to another using the migrate() function. I connected via tcp in the destination URI and migrated successfully(lesser than 2 seconds). I tried running virsh list --all on the destination PM and confirmed that the VM had been migrated successfully. When I tried checking ps aux | grep vmname where vmname was the name of the VM migrated, I could see that on the source PM the thread was still active with the PID though the machine had been migrated successfully. Shouldn't the vmname not be listed at all on the source PM's side,if it has been completely migrated? Isn't 2 seconds too little(considering the memory allotted to the VM was 128MB and I'm using a 100Mbps LAN switch, time taken=size/speed~10 seconds). Why is virsh list --all showing me that the VM migrated to be shutdown on the source PM? If it's been completely migrated, shouldn't the entry be removed completely? 2. Is there any way to set the CPU limit in terms of % of CPU used on a VCPU using libvirt function? As in, if I want my VM to use just 10% of VCPU 1. 3. I'm developing an application in Java to monitor VM usage(Memory,CPU, Network etc). Are there any easily integrable graph plotting applications I could integrate with? Thanks for your time. Regards, Preethi

2 1

[libvirt-users] Reg: shutdown/restart from within the container(system LXC)
by Alphonse Hansel Anthony 07 Oct '11

07 Oct '11

Hi, Is it possible to shutdown/restart a system LXC from within the container? From what I have observed(Version - 0.8.4): * The libvirt_lxc manager process, which listens on the /dev/pts for console connection loops infinitely. Let me know If I am missing out something obvious or there exists any other way to shutdown/restart system LXC from within. Any pointers in this regard would be useful. Thanks, Alphonse

2 2

[libvirt-users] Libvirt for custom VM
by ankur deshwal 07 Oct '11

07 Oct '11

Hi, I need to create an application where I can use a single interface for different VMs (libvirt becomes an obvious choice then). However I will need to control a VM running on custom hypervisor other than ones currently supported by libvirt. Is it possible to add a new interface to the hypervisor (easily)? Shall I try to use "test-hypervisor" supported by libvirt ?? I shall be grateful for some initial pointers to read which can help me for the task. Thanks and Regards, Ankur

2 1

[libvirt-users] Need help debugging virtio net issue
by Darren Dao 05 Oct '11

05 Oct '11

This is what I use for creating the VM sudo virt-install -n myvm -r 2048 --vcpus=1 --accelerate -v -w bridge:br0,model=virtio --nographics -m 54:52:00:01:bb:8d --disk path=/storage_pool/myvm.raw,size=20,bus=virtio --pxe It used to work fine, but now it get stuck trying to do pxeboot/kickstart. Here's what I see when trying to debug the pxeboot/kickstart process: * Querying DHCP server for IP address went through fine * vmlinuz.CentOS5-5.5-x86_64 was downloaded successfully * initrd.img.CentOS5-5.5-x86_64 started to get transferred, but then stopped. It looks like the VM's network interface just crashed (can't even ping the VM anymore) If I don't use virtio for networking, then everything went through fine. What's strange that is virtio used to work fine. I ran out of ideas/ways to debug this issue. Any has any idea? Here's more info on my system: Host: * Scientific Linux 6, kernel version: 2.6.32-71.el6.x86_64 * libvirt: 0.8.1-27 * qemu-kvm: 0.12.1.2-2.113 Guest: * Scientific Linux 6, kernel version: 2.6.32-71.el6.x86_64

1 0

[libvirt-users] libvir: Remote error : cannot recv data: : Connection reset by peer
by PREETHI RAMESH 04 Oct '11

04 Oct '11

I'm using Libvirt's Java API and connecting to the hypervisor using the same. My program is such that periodic discovery of active VMs is done using Libvirt's functions. However, when I try to perform any VM related operations while the Java code connecting to Qemu is running such as shutdown, start VM using virsh, I end up with : 'libvir: Remote error : cannot recv data: : Connection reset by peer' on my Java IDE and 'error: cannot recv data: : Connection reset by peer error: failed to connect to the hypervisor' on the terminal running virsh. I'm using QEMU emulator version 0.14.0 (qemu-kvm-0.14.0) and Libvirt version 0.4.7 on Ubuntu 11.04. Please help me out! Thanks.

3 2

[libvirt-users] Usage serial device
by David Goulet 04 Oct '11

04 Oct '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I'm trying to connect the *same* serial device to two KVM Linux machines where one is running KGDB and the other uses the connected serial to interact with the target machine running under KGDB. However, I'm unable to do so. Using a pty port, I am able to use my kgdb setup with host/VM but unable to make it work with VM/VM since it's two different pty created on the two machines. Anyone on this list can help me with that kind of setup ? Unfortunately, I must use libvirtd 0.7.5 for now... I'm aware that it might be a version issue here but still... Thanks! David -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAEBAgAGBQJOihLOAAoJEELoaioR9I02GawH/1Ux197Pj3F+Qf54LcI3yy+w Vhd8yOGIAreBES7FUIf/7dCFqUz2mXFbtRuo9KZi+M0qs02kEs/nbhgOJLmHdZFA iRdCprzCR4Ue1x8H/tVogfBElfGhlJDaPHx5KIsxDmXwPJYhrPBt8qhyzLSTVQZG /pibv03sQdGRM6ZIyIhbA3ZmZ7Yh0SToGl3Fodw5Yp6YjrxRtpTu/OkHuHweM+nq wxthsgVstAEjJSxwV5O1+GzQ8xVDzjvZTvSRXnU2mTKXTiW2CkbnPbDG7cYfAcdx jICcAOf4AHtuKt5ZTfXFMUT4qSPfEntoXKsjt1IpCOpYH70GNGxLkh96SKjS1+w= =AYT3 -----END PGP SIGNATURE-----

2 1

[libvirt-users] Second VM cannot get dhcp ip in NAT mode
by Magicloud Magiclouds 03 Oct '11

03 Oct '11

Hi, Yesterday I started to use libvirt with kvm under centos6. The first VM works great. Today I added another VM and start to initialize with virt-install. Well, it seems that, the second VM cannot get dhcp ip. I did not change the default libvirt network configuration. What should I do? -- 竹密岂妨流水过山高哪阻野云飞

2 3

[libvirt-users] qemu+ssh fails with "packet received from server too large"
by Trey Dockendorf 01 Oct '11

01 Oct '11

I'm attempting to connect to my KVM host from a remote system, but am unable to connect using virsh. I'm able to connect if I disable sasl on the KVM host... The KVM host is on CentOS 6 x86_64 with libvirt-0.8.1 Here's the command I'm using, --------- $ virsh -c qemu+ssh://kvmhost.tld/system error: packet received from server too large error: failed to connect to the hypervisor Here's the uncommented lines in my /etc/libvirt/libvirtd.conf ----------- listen_tls = 1 listen_tcp = 0 listen_addr = "...." (set to eth0) key_file = "/var/lib/puppet/ssl/private_keys/kvmhost.tld.pem" cert_file = "/var/lib/puppet/ssl/certs/kvmhost.tld.pem" ca_file = "/var/lib/puppet/ssl/certs/ca.pem" log_level = 1 log_filters="1:remote 1:event" log_outputs="1:syslog:libvirtd 1:file:/var/log/libvirt/libvirtd.log" There is no output in /var/log/libvirt/libvirtd.log while trying to connect remotely through virsh. The only logs that are generated are /var/log/secure, -------------- Sep 30 19:34:53 kvmhost sshd[20074]: Accepted publickey for foreman from 10.1.0.1 port 55269 ssh2 Sep 30 19:34:53 kvmhost sshd[20074]: pam_unix(sshd:session): session opened for user foreman by (uid=0) Sep 30 19:34:53 kvmhost sshd[20074]: pam_unix(sshd:session): session closed for user foreman I've also opened up the port through iptables, 1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:16514 And I don't see anything being blocked by SELinux during these connection attempts. Is there possibly a log filter I could enable to shed more light on this? Any help is greatly appreciated. Thanks - Trey

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