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[libvirt-users] cgroup error starting domains
by Matteo Bernardini 22 Jun '13

22 Jun '13

Hi, I've got a small problem using libvirt-1.0.5.1 (with the latest patch in the v1.0.5-maint branch on git added). I'm using slackware64-14.0 but the situation is exactly the same described on a debian bug http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=707201 When trying to start a domain I got error: Failed to start domain debian-wheezy-xfce error: Unable to initialize /machine cgroup: Invalid argument with this in libvirtd.log virCgroupDetect:373 : Failed to detect mounts for /machine qemuInitCgroup:425 : Unable to initialize /machine cgroup: Invalid argument and the error goes away if I unmount /sys/fs/cgroup. Reverting to 1.0.4 fixes this, but this exposes another thing that I report even if I'm not sure it's an error: if I create a domain with 1.0.5.1 (I use the latest virt-manager to do this), in the xml of the domain there's a line that doesn't seem to have the close tag <controller type='pci' index='0' model='pci-root'/> If I revert to 1.0.4 the domain with this line in the xml doesn't even get listed between the available domains and I got this in libvirtd.log virDomainControllerDefParseXML:4838 : internal error Unknown controller type 'pci' deleting the interested line make it available again. Please let me know if you need further informations on the matters. Matteo

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Re: [libvirt-users] Not able to open Xen Connection using libvirt
by varun bhatnagar 22 Jun '13

22 Jun '13

No it was not booted with xen kernel. Actually I tried booting it with xen kernel but I am getting a message saying Error No 15 : File not found. I tried editing the grub entry and noticed that there are 3 entries: 1) kernel /boot/xen.gz vga= mode-0x345 2) module /boot/vmlinuz-3.0.13-0.27-xen....... 3) module /boot/initrd-3.0.13-0.27-xen And in /boot i listed down the files, only xen.gz is there. Rest of the 2 files are not there (pasted the screenshot below). Even at one site it was given to remove /boot from the path but that also din't work. How shall I solve this one? // Varun On Wed, Jun 19, 2013 at 1:07 AM, Prasad <prasad(a)mukhedkar.com> wrote: > On 06/18/2013 10:03 PM, varun bhatnagar wrote: > > Hi, > > I am trying to create virtual machine through libvirt using xen > hypervisor. I was able to install xen successfully but when I tried > connecting to the hypervisor it gave an error. And while installing libvirt > (libvirt-1.0.1) I installed it with xen support. > I am pasting the snapshot of the error below: > > [image: Inline image 1] > > Can anyone tell me why I am getting this error? > > // > Varun > > > _______________________________________________ > libvirt-users mailing listlibvirt-users@redhat.comhttps://www.redhat.com/mailman/listinfo/libvirt-users > > Is this system booted with xen kernel? xen virtualization required > special kernel it doesn't work with standard kernel. > >

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[libvirt-users] 32 bit client on 32bit host
by Roland Giesler 22 Jun '13

22 Jun '13

As mentioned in another post, I trying to set up an existing Windows7 partition on an Ubuntu desktop as a libvirt guest and now have the following configuration files for this: <domain type='qemu'> <name>Windows7</name> <uuid>b2c9c297-907a-159d-7e87-a24a01eb5a57</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='i686' machine='pc-1.2'>hvm</type> <boot dev='hd'/> <bootmenu enable='yes'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>kvm32</model> <vendor>Intel</vendor> <feature policy='require' name='pbe'/> <feature policy='require' name='tm2'/> <feature policy='require' name='osxsave'/> <feature policy='require' name='ss'/> <feature policy='require' name='lm'/> <feature policy='require' name='dtes64'/> <feature policy='require' name='ht'/> <feature policy='require' name='ds'/> <feature policy='require' name='lahf_lm'/> <feature policy='require' name='xsave'/> <feature policy='require' name='tm'/> <feature policy='require' name='pdcm'/> <feature policy='require' name='pse36'/> <feature policy='require' name='ds_cpl'/> <feature policy='require' name='cx16'/> <feature policy='require' name='xtpr'/> <feature policy='require' name='acpi'/> </cpu> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/qemu-system-i386</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw'/> <source dev='/dev/sda1'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='52:54:00:22:60:93'/> <source network='default'/> <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='vga' 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='0x05' function='0x0'/> </memballoon> </devices> I manually changed the <emulator>/usr/bin/qemu-system-x86_64</emulator> to <emulator>/usr/bin/qemu-system-i386</emulator> since my hard drive partition contains 32bit Windows 7, although I'm not sure that this applies. My current machine setup it dual-boot, so I can boot Windows 7 from the first partition (/dev/sda1) using a grub boot menu. However, when I start the Windows 7 VM, I just get "Booting from Hard Disk" in the virt-manager console. What could be the problem? Lastly: /def/sda1 in a boot partition, but the rest of Windows is installed on /dev/sda2, but this partition is not marked bootable. thanks Roland

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[libvirt-users] Question about vport operation for FC HBA
by Dennis Chen 21 Jun '13

21 Jun '13

Hi, When I want to use NPIV for a FC HBA in my Linux machine, I got the below error msg in virsh: virsh # nodedev-create /home/kvm/vHBA.xml error: Failed to create node device from /home/kvm/vHBA.xml error: internal error Parent device scsi_host20 is not capable of vport operations I checked the /sys/class folder for my HBA device that I want to use its NPIV feature, it's there: /sys/class/fc_host/host20/vport_create I can create a vHBA by using "echo 'xxxx:xxxx' > ./vport_create", a new fc host will be created after that. But I can't find any FC host with: #virsh nodedev-list --cap fc_host SCSI hosts can be found for above "nodedev-list --cap scsi_host". The libvirt I am working on is based ver 1.0.5, I checked the code and found below function is seems related with this issue: src/util/virutil.c: int virIsCapableVport(const char *sysfs_prefix, int host) This function looks up if there is "vport_create" file under /sys/class/fc_host/host20, as the way to decide if a HBA device is capable of vport operation. But seems this file is not compiled and virsh doesn't call it in my source code environment... is there any tips ? BRs, Dennis

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[libvirt-users] Would a DOS on dovecot running under a VM cause host to crash?
by Hugh Davenport 21 Jun '13

21 Jun '13

Hey All, I'm just wondering whether this is what caused my server to crash. Started last night in NZ land. Jun 20 19:22:11 elm dovecot: imap-login: Disconnected (tried to use disallowed plaintext auth): user=<>, rip=attackerip, lip=10.0.0.3, session=<0C8LzpDfZQDINsQC> occasionally get Jun 20 19:22:52 elm dovecot: imap-login: Disconnected (no auth attempts in 1 secs): user=<>, rip=attackerip, lip=10.0.0.3, session=<bHdz0JDfpwDINsQC> or in 0 secs last at Jun 20 19:26:24 elm dovecot: imap-login: Disconnected (tried to use disallowed plaintext auth): user=<>, rip=attackerip, lip=10.0.0.3, session=<1MUR3ZDfcwDINsQC> and a minute later the server lost contact to the world. When I checked a bit later, the underlying host machine (dovecot runs on a VM (KVM)) had been powered off. Now, here in NZ land, there was also a crazy storm last night, and lots of brown outs. There could potentially of been a surge that killed it, but the UPS was still running fine when I started it again. The "attack" lasted around 4 minutes, in which there was 1161 lines in the log for a single attacker ip, and no other similar logs previously. Would this be enough to kill not only the VM running dovecot, but the underlying host machine? All up to date with patches, running debian stable (wheezy). dovecot-core debian package version 1:2.1.7-7 dovecot version 2.1.7 I notice there is a version 2.2.3 out, but not in debian yet. Could this fix this issue? I don't particularly want to have it happen again :D. The host is running debian oldstable (squeeze), so could update more. libvirt0 debian package version 0.8.3-5+squeeze5 libvirt version 0.8.3 I notice there is a version 1.0.6 out (debian stable only has 0.9.12-11+deb7u1, which is 0.9.12), would either of these versions fix an issue like this? qemu-kvm debian package version 0.12.5+dfsg-5+squeeze10 kernel is 2.6.32-5-amd64 Any thoughts? Cheers, Hugh

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[libvirt-users] libvirt hang on domain attemp to create domain
by Александр 20 Jun '13

20 Jun '13

good day, i am trying to create domain via virDomainDefineXML. and my program hanging, also i failed to caonnect to libvirt daemon with virt-manager after this, only killing libvirtd via SIGKILL and restarting it solveing hang (i mean after restart i able to connect with virt-manager), i using following domain xml <?xml version="1.0" encoding="UTF-8"?> <domain type="kvm"> <tittle>Automatically created domain with default configuration</tittle> <name>vm1</name> <description>no description</description> <os> <type>hvm</type> <boot dev="cdrom"/> <boot dev="hd"/> </os> <vcpu>1</vcpu> <memory unit="MB">512</memory> <cpu model="host-model"> <topology sockets="1" cores="1" threads="1"/> </cpu> <clock offset="localtime"/> <devices> <graphics type="vnc" autoport="yes" password="admin"/> <channel type="unix"> <source mode="bind" path="/var/run/vm1.sock"/> <target type="virtio" name="org.guest_agent.0"/> </channel> </devices> </domain> i have this calls on stack 0 0x00007ffff48c1750 __poll_nocancel 1 0x00007ffff649e5ca virNetClientIOEventLoop 2 0x00007ffff649ed96 virNetClientSendInternal 3 0x00007ffff64a0443 virNetClientSendWithReply 4 0x00007ffff64a0daa virNetClientProgramCall 5 0x00007ffff6478566 callFull.isra.2 6 0x00007ffff6487fa2 remoteDomainDefineXML 7 0x00007ffff6449d2f virDomainDefineXML 8 0x0000000000426941 virt_domain::create /home/sss/install/git/work/avirt/vm_pool/vm_pool/libvirt.cpp 295 9 0x000000000040c1a9 main /home/sss/install/git/work/avirt/vm_pool/vm_pool/main.cpp 40 what i am doing wrong ?

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[libvirt-users] Haswell 4770 misidentified as Sandy Bridge
by Michael Giardino 19 Jun '13

19 Jun '13

Hi, I'm running libvert on a Debian 7 system. I have upgraded libvert and qemu from source (v1.06 and 1.5.0 respectively) and the problem persists. The guest OS is also a Debian 7 system running a non-SMP kernel. The error message from virt-manager is Error starting domain: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: rtm, invpcid, erms, bmi2, smep, avx2, hle, bmi1, fsgsbase, pcid Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 66, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1114, in startup self._backend.create() File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 698, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: rtm, invpcid, erms, bmi2, smep, avx2, hle, bmi1, fsgsbase, pcid but the host /proc/cpuinfo gives the correct flags as processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz stepping : 3 microcode : 0x7 cpu MHz : 800.000 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 pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm bogomips : 6795.91 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: Is there a place in the code I can look where the CPU flags are checked? I did create this VM on the Debian 7 versions of libvirt and qemu, but I don't see that it should be much of a problem since you can swap CPUs in virt-manager. The end goal is to read Sandy Bridge+ RAPL MSRs from the guest OS. perf_events are now being exported, which is great for my work, but if I could read some of those RAPL MSRs, It would make my life orders of magnitude easier. Any help would be much appreciated. Best, Michael Giardino <giardino(a)ece.gatech.edu> <michael.giardino(a)gmail.com>

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[libvirt-users] Migration between 2 hosts
by Parakkal, Navin S 19 Jun '13

19 Jun '13

Hi , How does migration of VMs between 2 hosts work ? Say we want to migrate a VM from host A - > B , does it create a process on B, copy all the data of the process on A to B and then once done kill process on A. Is it how it happens ? Can someone tell me how the copying of data between process on A and new process on B is done ? Regards, Navin

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[libvirt-users] Live Migration Without Shared Storage
by cmcc.dylan 19 Jun '13

19 Jun '13

I‘m very exited to hear that qemu has supported live migration without shared storage and I also have found some persons give their experiments, for example: （http://blog.allanglesit.com/2011/08/linux-kvm-management-live-migration-without-shared-storage/） # virsh migrate --live vmname qemu+ssh://kvmnode02.allanglesit.net/system --copy-storage-all --verbose --persistent --undefinesource I repeated the above experiment, but I failed. I want to know I need which version of qemu and libvirt and how the progress of the new feature.

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[libvirt-users] Not able to open Xen Connection using libvirt
by varun bhatnagar 19 Jun '13

19 Jun '13

Hi, I am trying to create virtual machine through libvirt using xen hypervisor. I was able to install xen successfully but when I tried connecting to the hypervisor it gave an error. And while installing libvirt (libvirt-1.0.1) I installed it with xen support. I am pasting the snapshot of the error below: [image: Inline image 1] Can anyone tell me why I am getting this error? // Varun

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