- Users - libvirt List Archives

[libvirt-users] Unable to start guest
by Jeremy Johnston 24 Oct '12

24 Oct '12

I have been picking away at this problem and I have not been able to resolve it yet and it appears quite puzzling to me, I am attempting to start a guest on KVM and receive 'error: An error occurred, but the cause is unknown'. I have a feeling this may be something simple I am overlooking. I have included log files and the xml of the guest at http://node4.smart-serv.net/~jeremy/libvirt/

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[libvirt-users] using vbox driver hypervisor support
by p.venkatasrinivas＠tcs.com 24 Oct '12

24 Oct '12

Hi, I installed Libvirt. We need virtualbox support for libvirt. But we are unable to see the vbox option in virt-manager. How we can find vbox hypervisor driver? And also we already compiled libvirt with vbox option.(--with-vbox). But that didn't work. And also when we are creating the new virtual machine through virt-manager we are getting the following error: internal error cannot parse QEMU version number in "" Can you please suggest on this what we need to do as soon as possible? Thanks in advance. Srinivas =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

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[libvirt-users] start and stop a VMware VM using libvirt API
by Ali Nikzad 24 Oct '12

24 Oct '12

Hi, I am a new libvirt user and I wonder if I can use this library to start or stop a VM in ESXi 5.0. For example to write an application using libvirt in windows or linux that connects to an ESXi 5.0 server and get the list of VMs and start one of them. If so, is there any sample about it? Thank you, Ali

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[libvirt-users] Get data of Physical Machine
by Vinicius Gonçalves Braga 23 Oct '12

23 Oct '12

Hey, What kind of data de NodeInfo represents? With my researches I thought that it should return the data of the physical machine. But in my tests, when I run with diferents URLs in Connect creation the values of nodeInfo variables are differents. For example: it's the same machine, but if I run with xen:/// the memory is X and if I run with qemu:///session the memory is Y. Connect conn = new Connect("xen:///", false); NodeInfo nodeInfo = conn.nodeInfo(); assertEquals("nodeInfo.model", "i686", nodeInfo.model); assertEquals("nodeInfo.memory", 3145728, nodeInfo.mhz); assertEquals("nodeInfo.cpus", 16, nodeInfo.cpus); assertEquals("nodeInfo.cpus", 16, nodeInfo.maxCpus()); assertEquals("nodeInfo.nodes", 2, nodeInfo.nodes); assertEquals("nodeInfo.sockets", 2, nodeInfo.sockets); assertEquals("nodeInfo.cores", 2, nodeInfo.cores); assertEquals("nodeInfo.threads", 2, nodeInfo.threads); Another question is how can I connect with XenServer, the native hypervisor? Is it the same driver for Xen? Thanks!

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[libvirt-users] 回复： error: internal error lxc state driver is notactive
by #█er 23 Oct '12

23 Oct '12

Thanks for your response, I found that the server's kernel has been changed so I installed the official kernel by yum. but there still question: /usr/bin/virsh -c lxc:/// start instance-00000011 error: Failed to start domain instance-00000011 error: internal error Child process (PATH=/sbin:/usr/sbin:/bin:/usr/bin LIBVIRT_DEBUG=3 LIBVIRT_LOG_OUTPUTS=3:stderr /usr/libexec/libvirt_lxc --name instance-00000011 --console 27 --handshake 30 --background --veth veth1) status unexpected: fatal signal 11 ------------------ 原始邮件 ------------------ 发件人: "Osier Yang"<jyang(a)redhat.com>; 发送时间: 2012年10月22日(星期一) 晚上9:01 收件人: "#█er"<williamkyle(a)vip.qq.com>; 抄送: "libvirt-users"<libvirt-users(a)redhat.com>; 主题: Re: [libvirt-users] error: internal error lxc state driver is notactive On 2012年10月22日 15:55, #█er wrote: > hi: > I want to use libvirt with LXC, but when I use virsh -c lxc:/// to > connect to lxc, it just print these errors: > error: internal error lxc state driver is not active > error: failed to connect to the hypervisor > I searched these error message , but it seems that there is no helpful > information . > > Could you help me solve this problem? > Sounds like you don't have the LXC driver loaded. Possibably you don't have libvirt-daemon-driver-lxc installed if you use libvirt newer enough. Start the daemon like following will help you find out the cause. # LIBVIRT_DEBUG=1 /usr/sbin/libvirtd # virsh -c lxc:/// Regards, Osier

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[libvirt-users] attach-interface not permanent?
by Dennis Jacobfeuerborn 23 Oct '12

23 Oct '12

Hi, I just created a new interface for a running Windows 2008 guest using the attach-interface command which succeeded and I could see the interface in the guest and in the dumpxml output. Then I switched the type to virtio in virt-manager after which I got the message that this change would only appear after the next guest shutdown so I went ahead and shut down the guest. After that the new interface was gone and no longer showed up in the dumpxml output. I'm confused because at no point was it mentioned that the interface would only be added temporarily and the man-page doesn't say anything to that effect either. This happened on a fresh Centos 6.3 system. Any ideas what is going on here? Regards, Dennis

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[libvirt-users] error: internal error lxc state driver is not active
by #█er 22 Oct '12

22 Oct '12

hi: I want to use libvirt with LXC, but when I use virsh -c lxc:/// to connect to lxc, it just print these errors: error: internal error lxc state driver is not active error: failed to connect to the hypervisor I searched these error message , but it seems that there is no helpful information . Could you help me solve this problem? Thanks :)

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[libvirt-users] Questions and a blockpull issue
by Abbas 22 Oct '12

22 Oct '12

Coming off of xen environment; still testing with kvm, just a few questions: 1. What is the roadmap for release of qemu-kvm 1.1 and libvirt 0.10.2 for el6, cause I had to compile from upstream to get the latest stuff. 2. Should not virt-manager show the sparsed disk size instead of actual reserved size of a vm? 3. Where is the virsh bash_completion conf.d file from upstream; since el6 rpm for it seems have tab completion built right into virsh shell. 4. Created a disk-only snapshot of a vm CO1 called capture1 but the syntax of blockpulling seems to be opposite from what has been advertised on Fedora and other relative wikis. Check below and the error with first blockpull command. [root@KVM libvirt]# virsh snapshot-create-as CO1 capture1 "CO1s first snapshot test" --disk-only --atomic [root@KVM libvirt]# virsh -d 0 blockpull CO1 --path /home/vms/co1.img --bandwidth 500 --base /home/vms/co1.capture1 blockpull: domain(optdata): CO1 blockpull: path(optdata): /home/vms/co1.img blockpull: bandwidth(optdata): 500 blockpull: base(optdata): /home/vms/co1.capture1 blockpull: found option <domain>: CO1 blockpull: <domain> trying as domain NAME error: invalid argument: No device found for specified path [root@KVM libvirt]# virsh -d 0 blockpull --domain CO1 --path /home/vms/co1.capture1 --base /home/vms/co1.img --verbose --wait blockpull: domain(optdata): CO1 blockpull: path(optdata): /home/vms/co1.capture1 blockpull: base(optdata): /home/vms/co1.img blockpull: verbose(bool): (none) blockpull: wait(bool): (none) blockpull: found option <domain>: CO1 blockpull: <domain> trying as domain NAME Block Pull: [100 %] Pull complete Best, Abbas.

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[libvirt-users] cpuset not affecting real pid placement
by Andrey Korolyov 19 Oct '12

19 Oct '12

Hi, At least on 0.10.2 setting a cpuset doesn`t match a real process placement - VM still consumes all available cores. VM config: .snip. <vcpu placement='static' cpuset='0-5,12-17'>12</vcpu> .snip. for cpuset in $(find /cgroup/cpuset/libvirt/qemu/vmid/ -name cpuset.cpus) ; do grep 0-5 $cpuset ; done got: empty responce, e.g. 0-23 in my setup expected: at least bounded vcpuX threads In neighbor 'cpu' group libvirt sets cfq weights just fine, so this is clearly a bug.

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[libvirt-users] Using libvirt to monitor virtual environment.
by Vinicius Gonçalves Braga 19 Oct '12

19 Oct '12

Hey, I am new with libvirt. I am working to create a program to monitor a virtual environment. I have seen some solutions that use libvirt. Is this API good to make monitoring operations? I didn't see operations that show the CPU or memory usage, at least in Java binding. Are there operations like these, or we have to calculate based on lower level informations?

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[libvirt-users] Create and revert to snapshot fails silently after device update on running domain
by Jasper Spit 19 Oct '12

19 Oct '12

Hi list, I'm having an issue with snapshot creation. Scenario: qemu 1.1 libvirt 0.9.12 I create a domain, and start it. The domain has 1 IDE cdrom device defined (see below). When started, I want to mount an ISO file to it. So I do updateDeviceFlags in libvirt-python or update-device in virsh (both have the same problem). This works fine, the ISO image becomes available to the domain. Now I create a snapshot on the still running domain using snapshotCreateXML in libvirt-python or snapshot-create in virsh. The command returns immediately without error (a normal snapshot takes several seconds to complete). If I revert to this snapshot this command also returns immediately without error, but the snapshot is not actually reverted to, the domain remains running in the same state as if nothing had happened (I test this by verifying console output and checking if a testfile is present on the domain). If I do not use the update device commands prior to creating a snapshot, all is well. If I remove the source from the cdrom device using update device, the snapshots work properly again. Any idea what causes this? Steps to reproduce using virsh: virsh # start 4d5d722b-864c-657e-0f39-55d1bafc760e Domain 4d5d722b-864c-657e-0f39-55d1bafc760e started virsh # snapshot-create 4d5d722b-864c-657e-0f39-55d1bafc760e Domain snapshot 1348653920 created virsh # snapshot-revert 4d5d722b-864c-657e-0f39-55d1bafc760e 1348653920 All is good, the snapshot is reverted to properly. Now I update the cdrom device: virsh # update-device 4d5d722b-864c-657e-0f39-55d1bafc760e deb.xml Device updated successfully virsh # snapshot-create 4d5d722b-864c-657e-0f39-55d1bafc760e Domain snapshot 1348654116 created Command returns instantly. virsh # snapshot-revert 4d5d722b-864c-657e-0f39-55d1bafc760e 1348654116 No errors, but the snapshot is not reverted to. Now I remove the <source .../> again and do an update-device. virsh # update-device 4d5d722b-864c-657e-0f39-55d1bafc760e deb-off.xml Device updated successfully virsh # snapshot-create 4d5d722b-864c-657e-0f39-55d1bafc760e Domain snapshot 1348654540 created virsh # snapshot-revert 4d5d722b-864c-657e-0f39-55d1bafc760e 1348654540 Snapshot is created and reverted to properly. virsh # dumpxml 4d5d722b-864c-657e-0f39-55d1bafc760e <domain type='kvm' id='135'> <name>4d5d722b-864c-657e-0f39-55d1bafc760e</name> <uuid>4d5d722b-864c-657e-0f39-55d1bafc760e</uuid> <memory unit='KiB'>786432</memory> <currentMemory unit='KiB'>786432</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='pc-1.1'>hvm</type> <boot dev='hd'/> <boot dev='cdrom'/> </os> <features> <acpi/> <apic/> <pae/> </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='cdrom'> <driver name='qemu' type='raw'/> <source file='/data/images/debian-live-6.0.4-amd64-standard.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/data/domains/2f8baacd-563c-b747-b621-c0ddb4aa84bd'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:39:86:29'/> <source bridge='br0'/> <target dev='vnet2'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <input type='tablet' bus='usb'> <alias name='input0'/> </input> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5902' autoport='yes'/> <video> <model type='vga' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='none'/> </domain> deb.xml: <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/data/images/debian-live-6.0.4-amd64-standard.iso'/> <target dev='hdc' bus='ide'/> </disk> deb-off.xml: <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> </disk> Thanks much, - Jasper

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[libvirt-users] R: Using libvirt to monitor virtual environment.
by robmail16＠libero.it 19 Oct '12

19 Oct '12

Hello I need a solution for monitoring and automatic migration of Guest vm machines. A good approach would be to determine which guests to migrate based on "trend usage algorithm". There is something in java and libvirt that could be used? RegardsRoberto ----Messaggio originale---- Da: vinicius.braga(a)lupa.inf.ufg.br Data: 18/10/2012 16.02 A: <libvirt-users(a)redhat.com> Ogg: [libvirt-users] Using libvirt to monitor virtual environment. Hey, I am new with libvirt. I am working to create a program to monitor a virtual environment. I have seen some solutions that use libvirt. Is this API good to make monitoring operations? I didn't see operations that show the CPU or memory usage, at least in Java binding. Are there operations like these, or we have to calculate based on lower level informations?

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[libvirt-users] 0.10.x incorrectly reporting currentMemory size
by Andrey Korolyov 18 Oct '12

18 Oct '12

Hi, <memory unit='KiB'>16777216</memory> <currentMemory unit='KiB'>1394380</currentMemory> <memtune> <hard_limit unit='KiB'>1594380</hard_limit> <soft_limit unit='KiB'>1494380</soft_limit> </memtune> results to: 0.10.x, .dominfo. or dumpxml | grep -i currentmemory Max memory: 16777216 KiB Used memory: 13977292 KiB 0.9.11-13: Max memory: 16777216 KiB Used memory: 1394380 KiB

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[libvirt-users] Migrating a LV backed guest
by Corey Quinn 18 Oct '12

18 Oct '12

I have a KVM VM that's backed by a logical volume on local disk. I'd like to copy / move it to an identically configured host. [root@virt2 cquinn]# virsh migrate --copy-storage-all --verbose --persistent node1.www qemu+ssh://10.102.1.11/system error: Unable to read from monitor: Connection reset by peer How should I effectively troubleshoot this? Am I misunderstanding how virsh migrate is supposed to work? Regards, Corey Quinn

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[libvirt-users] cgroup blkio.weight working, but not for KVM guests
by Ben Clay 18 Oct '12

18 Oct '12

I'm running libvirt 0.10.2 and qemu-kvm-1.2.0, both compiled from source, on CentOS 6. I've got a working blkio cgroup hierarchy which I'm attaching guests to using the following XML guest configs: VM1 (foreground): <cputune> <shares>2048</shares> </cputune> <blkiotune> <weight>1000</weight> </blkiotune> VM2 (background): <cputune> <shares>2</shares> </cputune> <blkiotune> <weight>100</weight> </blkiotune> I've tested write throughput on the host using cgexec and dd, demonstrating that libvirt has correctly set up the cgroups: cgexec -g blkio:libvirt/qemu/foreground time dd if=/dev/zero of=trash1.img oflag=direct bs=1M count=4096 & cgexec -g blkio:libvirt/qemu/background time dd if=/dev/zero of=trash2.img oflag=direct bs=1M count=4096 & Snap from iotop, showing an 8:1 ratio (should be 10:1, but 8:1 is acceptable): Total DISK READ: 0.00 B/s | Total DISK WRITE: 91.52 M/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 9602 be/4 root 0.00 B/s 10.71 M/s 0.00 % 98.54 % dd if=/dev/zero of=trash2.img oflag=direct bs=1M count=4096 9601 be/4 root 0.00 B/s 80.81 M/s 0.00 % 97.76 % dd if=/dev/zero of=trash1.img oflag=direct bs=1M count=4096 Further, checking the task list inside each cgroup shows the guest's main PID, plus those of the virtio kernel threads. It's hard to tell if all the virtio kernel threads are listed, but all the ones I've hunted down appear to be there. However, when running the same dd commands inside the guests, I get roughly-equal performance - nowhere near the ~8:1 relative bandwidth enforcement I get from the host: (background ctrl-c'd right after foreground finishes, both started within 1s of each other) [ben@foreground ~]$ dd if=/dev/zero of=trash1.img oflag=direct bs=1M count=4096 4096+0 records in 4096+0 records out 4294967296 bytes (4.3 GB) copied, 104.645 s, 41.0 MB/s [ben@background ~]$ dd if=/dev/zero of=trash2.img oflag=direct bs=1M count=4096 ^C4052+0 records in 4052+0 records out 4248829952 bytes (4.2 GB) copied, 106.318 s, 40.0 MB/s I thought based on this statement: "Currently, the Block I/O subsystem does not work for buffered write operations. It is primarily targeted at direct I/O, although it works for buffered read operations." from this page: https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/ht ml/Resource_Management_Guide/ch-Subsystems_and_Tunable_Parameters.html that this problem might be due to host-side buffering, but I have that explicitly disabled in my guest configs: <devices> <emulator>/usr/bin/qemu-kvm</emulator> <disk type="file" device="disk"> <driver name="qemu" type="raw" cache="none"/> <source file="/path/to/disk.img"/> <target dev="vda" bus="virtio"/> <alias name="virtio-disk0"/> <address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x0"/> </disk> Here is the qemu line from ps, showing that it's clearly being passed through from the guest XML config: root 5110 20.8 4.3 4491352 349312 ? Sl 11:58 0:38 /usr/bin/qemu-kvm -name background -S -M pc-1.2 -enable-kvm -m 2048 -smp 2,sockets=2,cores=1,threads=1 -uuid ea632741-c7be-36ab-bd69-da3cbe505b38 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/background.monitor,server,n owait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/path/to/disk.img,if=none,id=drive-virtio-disk0,format=raw,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virti o-disk0,bootindex=1 -netdev tap,fd=20,id=hostnet0,vhost=on,vhostfd=22 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:11:22:33:44:55,bus=pci.0,addr= 0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -vnc 127.0.0.1:1 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 For fun I tried a few different cache options to try to force a bypass the host buffercache, including writethough and directsync, but the number of virtio kernel threads appeared to explode (especially for directsync) and the throughput dropped quite low: ~50% of "none" for writethrough and ~5% for directsync. With cache=none, when I generate write loads inside the VMs, I do see growth in the host's buffer cache. Further, if I use non-direct I/O inside the VMs, and inflate the balloon (forcing the guest's buffer cache to flush), I don't see a corresponding drop in background throughput. Is it possible that the cache="none" directive is not being respected? Since cgroups is working for host-side processes I think my blkio subsystem is correctly set up (using cfq, group_isolation=1 etc). Maybe I miscompiled qemu, without some needed direct I/O support? Has anyone seen this before? Ben Clay rbclay(a)ncsu.edu

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[libvirt-users] Migrating fails with "Timed out during operation: cannot acquire state change lock"
by Guido Winkelmann 17 Oct '12

17 Oct '12

Hi, After recently upgrading to 0.9.11 (as shipped with Fedora 17), I was just trying to migrate a qemu domain from one host to another (using virDomainMigrateToURI()), when I got this error message: Unsafe migration: Migration may lead to data corruption if disks use cache != none Okay, this is explainable (if a bit disappointing - I would have hoped that qemu would be able to disable disk caches before migration and then reenable them afterwards...). However, the next time I tried migrating the same domain, I got this error message after about 30 seconds: Timed out during operation: cannot acquire state change lock This looks like a bug to me - granted not a high profile one if it only happens when someone is retrying a failed migration, but still... Guido

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[libvirt-users] Connection using Java
by Felipe Oliveira Gutierrez 16 Oct '12

16 Oct '12

Hi, I am using java to connect to the xen, but my class is throwing a exception. Does anyone know what is happening? public class TestConnection { public static void main(String[] args) { Connect conn = null; try { conn = new Connect("xen+ssh://root@192.XXX.XXX.XX/", true); libvir: RPC error : End of file while reading data: nc: invalid option -- 'U' nc -h for help: Input/output error exception caught:org.libvirt.LibvirtException: End of file while reading data: nc: invalid option -- 'U' nc -h for help: Input/output error level:VIR_ERR_ERROR code:VIR_ERR_SYSTEM_ERROR domain:VIR_FROM_RPC hasConn:false hasDom:false hasNet:false message:End of file while reading data: nc: invalid option -- 'U' nc -h for help: Input/output error str1:%s str2:End of file while reading data: nc: invalid option -- 'U' nc -h for help: Input/output error str3:null int1:-1 int2:-1 Thanks, Felipe -- *-- Felipe Oliveira Gutierrez* *-- **lipe.82(a)gmail.com* <lipe.82(a)gmail.com> *-- https://sites.google.com/site/lipe82/Home/diaadia*

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[libvirt-users] LXC guest memory recycling under RHEL6
by Rudy Godoy Guillén 14 Oct '12

14 Oct '12

Hello, I'm running a LXC guest using libvirtd under RHEL6. The guest has this particular memory behavior that I'm unable to explain. I've the following memory settings for this guest's memory. Inside the guest I'm running a Apache webserver serving PHP scripts and static content. <memory unit='GB'>2</memory> <currentMemory unit='GB'>2</currentMemory> <memtune> <hard_limit unit='GB'>2</hard_limit> </memtune> Now, when querying using virsh dominfo I see the amount of used RAM increases every second and it gets to the point where it reaches the limit causing the guest to be unresponsive. The current solution is destroying the guest process (virsh destroy) and starting again, but the behavior repeats again. As I understand what is happening is that the amount of memory used by Apache's processes (4 mpm forks) is never released so every request causes more memory comsumption reaching that point. If I'm correct on this what can I do to handle it? thanks! -- Rudy Godoy http://stone-head.org

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[libvirt-users] What to configure for a guest with 2.2. kernel ...
by Stefan G. Weichinger 13 Oct '12

13 Oct '12

Greetings, libvirt-users ... I ask for help with virtualizing an ancient machine with a linux kernel 2.2. I already succeeded doing that but I face random performance issues and I somehow get lost in all the settings and options. I am using Virtual Machine Manager: * I can't chose something like Linux for the OS and 2.2 for the kernel. Does the combination "linux/2.4 kernel" work or should I choose "Other" or "Generic" ? * Later there I get a choice of "Architektur" (or "architecture" ? german here): for a 32bit-guest, should it be "i686" to reflect the environment for the guest or "x86_64" to fully use the potential of the host? Please forgive my questions, maybe they are FAQ somewhere, I really fiddled a lot already ... Thanks, Stefan

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[libvirt-users] Libvirt mpiexec networking issue
by Shawn Furrow 12 Oct '12

12 Oct '12

Hi all, Not sure if this is the best place to put this question since I'm not sure if it's a Libvirt issue but... I currently have two VMs up with networking and I can successfully ssh to and from each VM and I have confirmed that I can successfully download things from the internet. However, when trying to run mpiexec (which uses ssh), the connection fails and gives me the following errors: [proxy:0:0@guestVM] HYDU_sock_connect (./utils/sock/sock.c:188): unable to connect from "guestVM" to "guestVM" (Connection refused) [proxy:0:0@guestVM] main (./pm/pmiserv/pmip.c:205): unable to connect to server guestVM at port 56514 (check for firewalls!) Just so it is clear, I know that the two guests host names are the same (they are clones) but I am giving explicit IP address for the connection so it should not be an issue. Does any one know if there is something unique with how Libvirt networking is set up that would cause such an error? I have tried checking for firewalls and there don't seem to be any. Thanks, Shawn -- Virginia Tech Bradley Department of Electrical and Computer Engineering B.S. Electrical Engineering B.S. Computer Engineering

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[libvirt-users] libvirt java api create volume bug?
by zhijun liu 12 Oct '12

12 Oct '12

hi,all I use libirt Java AP { pool.storageVolCreateXML(xml,0)} to create a volume ,notice:here I define the format is "qcow2", the xml file is : <volume> <name>volume8</name> <capacity unit="KB">512000</capacity> <target> <format type="qcow2" /> </target> </volume> when use command check the volume's format, root@60:/dev/vgtest2# qemu-img info volume8 image: volume8 file format: raw virtual size: 500M (524288000 bytes) disk size: 0 I think this is a bug.can you fix it? the libvirt version is 0.9.8 libivrt-java version is 0.4.9 os:ubuntu12.04 thanks liuzhijun

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[libvirt-users] Libvirt Error guest wont start
by Shawn Furrow 12 Oct '12

12 Oct '12

Hi all, I have been using Libvirt for several months now and I have only had minimal problems. I had a particular setup and was starting up multiple guests just fine. However, with seemingly no changes I now get the following error when trying to start a guest: virsh start guest0 error: Failed to start domain guest0 error: internal error Process exited while reading console log output: Supported machines are: pc Standard PC (alias of pc-0.12) pc-0.12 Standard PC (default) pc-0.11 Standard PC, qemu 0.11 pc-0.10 Standard PC, qemu 0.10 isapc ISA-only PC Apparently, the machine argument settings were changed in recent versions of Libvirt. Or at least that is what it seems. My guest's OS settings were: <os> <type arch='x86_64' machine='pc-1.1'>hvm</type> <boot dev='hd'/> </os> After getting this error I tried setting the machine argument to one of the "supported" ones. Then I get this error: virsh start guest0 error: Failed to start domain guest0 error: Unable to read from monitor: Connection reset by peer Anyone have any ideas as to why this happened all of a sudden? I was not having any problems before. Thanks, Shawn -- Virginia Tech Bradley Department of Electrical and Computer Engineering B.S. Electrical Engineering B.S. Computer Engineering

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[libvirt-users] virsh start failed (Failed to query file context on ...)
by Binknight 11 Oct '12

11 Oct '12

hi all, I try to follow the instructions in http://libvirt.org/drvlxc.html to config libvirt-lxc, but failed when starting the lxc. The domain config file: # cat b.xml <domain type='lxc'> <name>b</name> <memory>32768</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/data/lxc/centos6'/> <target dir='/'/> </filesystem> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> then define it: # virsh --connect lxc:/// define b.xml Domain b defined from b.xml then start: # virsh --connect lxc:/// start b error: Failed to start domain b error: internal error guest failed to start: 2012-10-10 09:56:17.369+0000: 452722: info : libvirt version: 0.9.10, package: 21.el6_3.4 (CentOS BuildSystem <http://bugs.centos.org>, 2012-08-23-18:28:26, c6b9.bsys.dev.centos.org) 2012-10-10 09:56:17.369+0000: 452722: error : lxcControllerRun:1484 : Failed to query file context on /data/lxc/centos6: No data available It's the filesystem mount section that cause this problem. The tutorial says the path '/data/lxc/centos6' should be "private root filesystem (perhaps hand-crafted using busybox, or installed from media, debootstrap, whatever)", but I am not quite clear about what this path should be. In my case, the "/data/lxc/centos6" is the root of template downloaded from http://wiki.openvz.org/Download/template/precreated. # pwd /data/lxc/centos6 # ls bin boot dev etc fastboot home lib media mnt opt proc root sbin selinux srv sys tmp usr var Can someone elaborate what should <source dir='/data/lxc/centos6'/> be? many thanks

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[libvirt-users] can not connect hypervisor using libvirt-0.9.8 on windows
by xuanmao_001 10 Oct '12

10 Oct '12

Hi, Eric: I compiled libvirt-0.9.8 source code with the msys environment on windows xp. the compiltion was successed. but when I connect the remote host using virsh.exe, it occured error like: error: Failed to connect to the hypervisor error: Unable to set close-on-exec flag: No such file or directory Is there something wrong? give me some help, thanks! xuanmao_001

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[libvirt-users] network setup
by anita.sivakumar＠wipro.com 09 Oct '12

09 Oct '12

Hi All, I am a newbie to libvirt. I am trying to set up a Lxc container using a nat based network. I am able to create the container and log into it. But I don't see any interface created by default in the container. In other words my ifconfig inside the container does not show up any interfaces even if I run 'ifconfig lo up' for a loop back interface. Also I don't have any dhcp configured in my machine. I am not sure why this is happening... These are my network and domain configurations. Any help will be highly appreciated. <network> <name>mynetwork</name> <forward mode="nat" dev="em2"/> <bridge name="virbr1" /> <ip address="192.168.123.1" netmask="255.255.255.0"> <dhcp> <range start="192.168.123.2" end="192.168.123.10" /> <host mac="18:03:73:F8:8A:75" name="vm100" ip="192.168.123.3"/> </dhcp> </ip> </network> Domain xml: <domain type='lxc'> <name>helloworld</name> <memory>102400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <devices> <console type='pty'/> </devices> <interface type='network'> <source network='mynetwork'/> <mac address="18:03:73:F8:8A:75"/> <target dev='vm100'/> </interface> </domain> Regards, Anita

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