January 2017 - Users - libvirt List Archives

[libvirt-users] ceph rbd pool and libvirt manageability (virt-install)
by Jelle de Jong 29 Aug '18

29 Aug '18

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everybody, I created a rbd pool and activated it, but I can't seem to create volumes in it with virsh or virt-install? # virsh pool-dumpxml myrbdpool <pool type='rbd'> <name>myrbdpool</name> <uuid>2d786f7a-2df3-4d79-ae60-1535bcf1c6b5</uuid> <capacity unit='bytes'>6997998301184</capacity> <allocation unit='bytes'>10309227031</allocation> <available unit='bytes'>6977204658176</available> <source> <host name='ceph01.powercraft.nl' port='6789'/> <host name='ceph02.powercraft.nl' port='6789'/> <host name='ceph03.powercraft.nl' port='6789'/> <name>libvirt-pool</name> <auth type='ceph' username='libvirt'> <secret uuid='029a334e-ed57-4293-bb99-ffafa8867122'/> </auth> </source> </pool> # virt-install --version 1.0.1 # virsh --version 1.2.9 I ended using virsh edit ceph-test.powercraft.nl and making creating the disk manually. <disk type='network' device='disk'> <auth username='libvirt'> <secret type='ceph' uuid='029a334e-ed57-4293-bb99-ffafa8867122'/> </auth> <source protocol='rbd' name='libvirt-pool/kvm01-storage'> <host name='ceph01.powercraft.nl' port='6789'/> <host name='ceph02.powercraft.nl' port='6789'/> <host name='ceph03.powercraft.nl' port='6789'/> </source> <target dev='vdc' bus='virtio'/> </disk> I use virt-install a lot to define, import and undefine domains, how can I use virt-install to manage my rdb disks? Kind regards, Jelle de Jong -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iJwEAQECAAYFAlV1xlQACgkQ1WclBW9j5HkbPQP+PjNrzvlqysslOp2Yk7wH4Mxy 2sh2dn96G0KOAHEeEn3BN6IWlnD1TADZbHdpTtMwkdv48Xwn0sP1s+3QDM4pb3gP n+z+dVxS8FouDIy/eiso3IBCj3g4TWbEX8ZHqs3jKqe0lZgAXBzB9xYSUowcEBrZ ddkPbr8p8ozWyOG+9V8= =lkK7 -----END PGP SIGNATURE-----

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[libvirt-users] virRandomBits - not very random
by Brian Rak 01 Jun '18

01 Jun '18

I just ran into an issue where I had about 30 guests get duplicate mac addresses assigned. These were scattered across 30 different machines. Some debugging revealed that: 1) All the host machines were restarted within a couple seconds of each other 2) All the host machines had fairly similar libvirtd pids (within ~100 PIDs of each other) 3) Libvirt seeds the RNG using 'time(NULL) ^ getpid()' This perfectly explains why I saw so many duplicate mac addresses. Why is the RNG seed such a predictable value? Surely there has to be a better source of a random seed then the timestamp and the pid? The PID seems to me to be a very bad source of any randomness. I just ran a test across 60 of our hosts. 43 of them shared their PID with at least one other machine.

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[libvirt-users] dhcp <option> element - is this included yet?
by lejeczek 02 Feb '17

02 Feb '17

hi all, I've seen this: https://www.redhat.com/archives/libvir-list/2013-March/msg00822.html it's a few years old and I wonder (I hope) - implemented yet? cheers, L.

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[libvirt-users] virt-p2v - Windows 10 guest hangs at boot after successful P2V
by JT Edwards 02 Feb '17

02 Feb '17

Hi all, I successfully virt-p2v'ed a Windows 10 laptop to my Centos 7.3 instance running KVM. However, on boot, the guest hangs. Is there a registry fix that is needed after the P2V is done? Here is what is in the guest's logfile: 017-01-08 03:20:37.508+0000: starting up libvirt version: 2.0.0, package: 10.el7_3.2 (CentOS BuildSystem <http://bugs.centos.org>, 2016-12-06-19:53:38, c1bm.rdu2.centos.org) qemu version: 1.5.3 (qemu-kvm-1.5.3-126.el7), hostname: torden40.me.org LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=spice /usr/libexec/qemu-kvm -name win10 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Conroe,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid f72e7ad5-98d4-44ab-aa85-347fe232b4e5 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-9-win10/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/home/tstrike39/Virtuals/tordenmobile.img,format=qcow2,if=none,id=drive-ide0-0-0 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -netdev tap,fd=26,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:d6:c8:67,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -vga qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=67108864 -global qxl-vga.vgamem_mb=16 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on char device redirected to /dev/pts/2 (label charserial0) main_channel_link: add main channel client main_channel_handle_parsed: net test: latency 0.140000 ms, bitrate 14222222222 bps (13563.368055 Mbps) ((null):19947): Spice-Warning **: red_channel.c:542:red_channel_client_send_ping: getsockopt failed, Operation not supported red_dispatcher_set_cursor_peer: inputs_connect: inputs channel client create ((null):19947): Spice-Warning **: red_channel.c:542:red_channel_client_send_ping: getsockopt failed, Operation not supported ((null):19947): Spice-Warning **: red_channel.c:542:red_channel_client_send_ping: getsockopt failed, Operation not supported Below is the XML of my migrated instance: <?xml version='1.0' encoding='utf-8'?> <domain type='kvm'>  <name>localhost</name> <memory unit='KiB'>4194304</memory> <currentMemory unit='KiB'>4194304</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64'>hvm</type> </os> <features> <acpi/> <apic/> </features> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/tstrike39/Virtuals/localhost-sda'/> <target dev='vda' bus='virtio'/> </disk> <interface type='network'> <source network='default'/> <model type='virtio'/> <mac address='f0:de:f1:08:9c:c4'/> </interface> <video> <model type='cirrus' vram='9216' heads='1'/> </video> <graphics type='vnc' autoport='yes' port='-1'/> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <console type='pty'/> </devices> </domain> Any help would be appreciated!

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[libvirt-users] CfP 12th Virtualization in High-Performance Cloud Computing Workshop (VHPC '17)
by VHPC 17 01 Feb '17

01 Feb '17

==================================================================== CALL FOR PAPERS 12th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '17) held in conjunction with the International Supercomputing Conference - High Performance, June 18-22, 2017, Frankfurt, Germany. (Springer LNCS Proceedings) ==================================================================== Date: June 22, 2017 Workshop URL: http://vhpc.org Abstract Submission Deadline: February 28, 2017 Paper Submission Deadline: April 25, 2017 (Springer LNCS) Abstract/Paper Submission Link: https://edas.info/newPaper.php?c=23179 Call for Papers Virtualization technologies constitute a key enabling factor for flexible resource management in modern data centers, and particularly in cloud environments. Cloud providers need to manage complex infrastructures in a seamless fashion to support the highly dynamic and heterogeneous workloads and hosted applications customers deploy. Similarly, HPC environments have been increasingly adopting techniques that enable flexible management of vast computing and networking resources, close to marginal provisioning cost, which is unprecedented in the history of scientific and commercial computing. Various virtualization technologies contribute to the overall picture in different ways: machine virtualization, with its capability to enable consolidation of multiple underutilized servers with heterogeneous software and operating systems (OSes), and its capability to live-migrate a fully operating virtual machine (VM) with a very short downtime, enables novel and dynamic ways to manage physical servers; OS-level virtualization (i.e., containerization), with its capability to isolate multiple user-space environments and to allow for their coexistence within the same OS kernel, promises to provide many of the advantages of machine virtualization with high levels of responsiveness and performance; I/O Virtualization allows physical NICs/HBAs to take traffic from multiple VMs or containers; network virtualization, with its capability to create logical network overlays that are independent of the underlying physical topology and IP addressing, provides the fundamental ground on top of which evolved network services can be realized with an unprecedented level of dynamicity and flexibility; the increasingly adopted paradigm of Software-Defined Networking (SDN) promises to extend this flexibility to the control and data planes of network paths. Publication Accepted papers will be published in a Springer LNCS proceedings volume. Topics of Interest The VHPC program committee solicits original, high-quality submissions related to virtualization across the entire software stack with a special focus on the intersection of HPC and the cloud. Major Topics - Virtualization in supercomputing environments, HPC clusters, HPC in the cloud and grids - OS-level virtualization and containers (Docker, rkt, Singularity, Shifter, i.a.) - Lightweight/specialized operating systems, unikernels - Optimizations of virtual machine monitor platforms and hypervisors - Hypervisor support for heterogenous resources (GPUs, co-processors, FPGAs, etc.) - Virtualization support for emerging memory technologies - Virtualization in enterprise HPC and microvisors - Software defined networks and network virtualization - Management, deployment of virtualized environments and orchestration (Kubernetes i.a.), - Workflow-pipeline container-based composability - Performance measurement, modelling and monitoring of virtualized/cloud workloads - Virtualization in data intensive computing and Big Data processing - HPC convergence - Adaptation of HPC technologies in the cloud (high performance networks, RDMA, etc.) - ARM-based hypervisors, ARM virtualization extensions - I/O virtualization and cloud based storage systems - GPU, FPGA and many-core accelerator virtualization - Job scheduling/control/policy and container placement in virtualized environments - Cloud reliability, fault-tolerance and high-availability - QoS and SLA in virtualized environments - IaaS platforms, cloud frameworks and APIs - Large-scale virtualization in domains such as finance and government - Energy-efficient and power-aware virtualization - Container security - Configuration management tools for containers (including CFEngine, Puppet, i.a.) - Emerging topics including multi-kernel approaches and,NUMA in hypervisors The Workshop on Virtualization in High-Performance Cloud Computing (VHPC) aims to bring together researchers and industrial practitioners facing the challenges posed by virtualization in order to foster discussion, collaboration, mutual exchange of knowledge and experience, enabling research to ultimately provide novel solutions for virtualized computing systems of tomorrow. The workshop will be one day in length, composed of 20 min paper presentations, each followed by 10 min discussion sections, plus lightning talks that are limited to 5 minutes. Presentations may be accompanied by interactive demonstrations. Important Dates February 28, 2017 - Abstract Submission Deadline April 25, 2017 - Paper submission deadline May 30, 2017 - Acceptance notification June 22, 2017 - Workshop Day June 25, 2017 - Camera-ready version due Chair Michael Alexander (chair), scaledinfra technologies, Austria Anastassios Nanos (co-chair), NTUA, Greece Balazs Gerofi (co-chair), RIKEN Advanced Institute for Computational Science, Japan Program committee Stergios Anastasiadis, University of Ioannina, Greece Jakob Blomer, CERN, Europe Ron Brightwell, Sandia National Laboratories, USA Eduardo César, Universidad Autonoma de Barcelona, Spain Julian Chesterfield, OnApp, UK Stephen Crago, USC ISI, USA Christoffer Dall, Columbia University, USA Patrick Dreher, MIT, USA Robert Futrick, Cycle Computing, USA Maria Girone, CERN, Europe Kyle Hale, Northwestern University, USA Romeo Kinzler, IBM, Switzerland Brian Kocoloski, University of Pittsburgh, USA Nectarios Koziris, National Technical University of Athens, Greece John Lange, University of Pittsburgh, USA Che-Rung Lee, National Tsing Hua University, Taiwan Giuseppe Lettieri, University of Pisa, Italy Qing Liu, Oak Ridge National Laboratory, USA Nikos Parlavantzas, IRISA, France Kevin Pedretti, Sandia National Laboratories, USA Amer Qouneh, University of Florida, USA Carlos Reaño, Technical University of Valencia, Spain Thomas Ryd, CFEngine, Norway Josh Simons, VMWare, USA Borja Sotomayor, University of Chicago, USA Craig Stewart, Indiana University, USA Anata Tiwari, San Diego Supercomputer Center, USA Kurt Tutschku, Blekinge Institute of Technology, Sweden Yasuhiro Watashiba, Osaka University, Japan Nicholas Wright, Lawrence Berkeley National Laboratory, USA Chao-Tung Yang, Tunghai University, Taiwan Paper Submission-Publication Papers submitted to the workshop will be reviewed by at least two members of the program committee and external reviewers. Submissions should include abstract, key words, the e-mail address of the corresponding author, and must not exceed 10 pages, including tables and figures at a main font size no smaller than 11 point. Submission of a paper should be regarded as a commitment that, should the paper be accepted, at least one of the authors will register and attend the conference to present the work. Accepted papers will be published in a Springer LNCS volume. . The format must be according to the Springer LNCS Style. Initial submissions are in PDF; authors of accepted papers will be requested to provide source files. Format Guidelines: ftp://ftp.springer.de/pub/tex/latex/llncs/latex2e/llncs2e.zip Abstract, Paper Submission Link: https://edas.info/newPaper.php?c=23179 Lightning Talks Lightning Talks are non-paper track, synoptical in nature and are strictly limited to 5 minutes. They can be used to gain early feedback on ongoing research, for demonstrations, to present research results, early research ideas, perspectives and positions of interest to the community. Submit abstract via the main submission link. General Information The workshop is one day in length and will be held in conjunction with the International Supercomputing Conference - High Performance (ISC) 2017, June 18-22, Frankfurt, Germany.

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[libvirt-users] Libvirt 3.0 machine start fails on LVM
by Jeroen Hoekx 01 Feb '17

01 Feb '17

Hello, Since updating to libvirt 3.0 I am no longer able to create a virtual machine that is backed by LVM storage on my two Arch machines. This is the error in virt-manager: Unable to complete install: 'An error occurred, but the cause is unknown' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 88, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/create.py", line 2288, in _do_async_install guest.start_install(meter=meter) File "/usr/share/virt-manager/virtinst/guest.py", line 461, in start_install doboot, transient) File "/usr/share/virt-manager/virtinst/guest.py", line 396, in _create_guest self.domain = self.conn.createXML(install_xml or final_xml, 0) File "/usr/lib/python2.7/site-packages/libvirt.py", line 3773, in createXML if ret is None:raise libvirtError('virDomainCreateXML() failed', conn=self) libvirtError: An error occurred, but the cause is unknown I originally encountered the problem when running my Ansible modules for libvirt in https://github.com/ansible-provisioning/ansible-provisioning , so the issue is not virt-manager specific. Steps to reproduce in virt-manager (1.4.0-3): - create a new VM - choose import existing disk image - create a new logical volume when browsing to find the existing image path or select a lv that was manually created before. - click forward - click forward - click finish When using qcow2 storage, both virt-manager and my modules work fine. This was also working on previous versions of libvirt. I do not see any changes in compilation flags in the Arch packages. Is there anything I can do to help diagnose this issue? Greetings, Jeroen

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[libvirt-users] libvirt does not show same CPU Model as /proc/cpuinfo for CPU Model info.
by akhilesh rawat 31 Jan '17

31 Jan '17

Hi , Created new thread . Environment: Bare Metal server + CentOs with qemu/KVM +libvirt for virtualization Guest Instantiated with virt-install with forced CPU model like below virt-install --virt-type kvm --name compute-0 --cpu Haswell,+fma,+movbe,+fsgsbase,+bmi1,+hle,+avx2,+smep,+bmi2,+erms,+invpcid,+rtm --ram=61440 --vcpus=20 --os-type=linux --os-variant=generic After guest installation /proc/cpuinfo show model name as Haswell . However Libvirt virsh capabilities show CPU configuration as "SandyBridge . " 1. Could I get explanation of the why inconsistency . 2. Is this expected behaviour 3. Why libvirt does not show same CPU Model as /proc/cpuinfo for CPU Model info. My Aim : Nested Virtualization and Nested Guest needs CPU model as Haswell strictly . 4. IS it possible alternative to succeed in my aim ? Thanks a lot for support. ! Guest CPU config: processor : 19 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel Core Processor (Haswell) stepping : 1 microcode : 0x1 cpu MHz : 1995.144 cache size : 4096 KB fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm xsaveopt bogomips : 4105.33 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: <capabilities> <host> <uuid>95c4e625-3383-4ec1-9ee4-c47a87d93b97</uuid> <cpu> <arch>x86_64</arch> <model>SandyBridge</model> <vendor>Intel</vendor> <topology sockets='20' cores='1' threads='1'/> <feature name='hypervisor'/> <feature name='osxsave'/> <feature name='pcid'/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='2048'/> Host CPU config: processor : 23 vendor_id : GenuineIntel cpu family : 6 model : 45 model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz stepping : 7 microcode : 0x710 cpu MHz : 1200.000 cache size : 15360 KB physical id : 1 siblings : 12 core id : 5 cpu cores : 6 apicid : 43 initial apicid : 43 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 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid xsaveopt bogomips : 4004.01 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: Br Aki

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[libvirt-users] LibVirt query CPU Model support and restore operation
by akhilesh rawat 27 Jan '17

27 Jan '17

Hello , It was working good working with kvm management tools using libvirt . virsh/virt-manager . But then i got annoyed when management tool did not allow me to change the CPU model while creating new virtual machine . error root@kvm-server qemu]# virt-install --virt-type kvm --name compute-2 --cpu Haswell-noTSX --ram=61440 --vcpus=20 --os-type=linux --os-variant=generic --disk compute2-disk0.qcow2,device=disk,bus=ide,size=300,sparse=true,format=qcow2 --pxe --network bridge=virbr0,model=e1000 --network bridge=virbr0,model=e1000 --network bridge=virbr0,model=virtio --network bridge=virbr0,model=virtio --graphics vnc,port=5906 --noautoconsole Starting install... ERROR unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: invpcid, erms, bmi2, smep, avx2, bmi1, fsgsbase, movbe, fma Domain installation does not appear to have been successful. I could not resolve this error . Finally i came across the post which say that libvirt cross verifies flags under CPU model present in /usr/share/libvirt/cpu_map.xml and cat /proc/cpuinfo . An yes the flag complained were not present in host proc/cpuinfo. Question 1: Is it really needed for Libvirt to do this check . AS KVM seems to allow support Haswell with native commands . Why libvirt is doing this check then ? As i was not sure where the problem lies and i was using libvirt 2.0.0 version i upgraded to 2.5.0 by compiling form source . But then i faces issue using virsh/virt-manager as seem it was not compatilble with upgarded version of libvirt. Now my system is little messed around libvirt . I did reinstall/reboot Quite many things not working . Question 2 : How can i restore original Libvirt 2.0.0 . br aki

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[libvirt-users] Unresticted guest trunk network interface
by Dennis Jacobfeuerborn 26 Jan '17

26 Jan '17

Hi, is there way to create a network interface for a guest that just forwards packets tagged with a vlan id? Currrently I have a guest that has configured 10+ interfaces and for each one I add I have to create a new vlan interface and a bridge on the host which makes things rather cumbersome. What I'd like to have is just one interface eth0 in the guest and then be able to create eth0.2, eth0.3 in the guest and have the host just pass them through without interference. I found some guides on the internet but these always come with some limitation such as that if you have a vlan interface on the host like e.g. eth0.8 then the guest no longer receives packets in vlan 8 as there apparently get consumed by the host. Is there any solution for this? Regards, Dennis

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[libvirt-users] KVM live migration issues for Windows guests
by Fabrizio Soppelsa 23 Jan '17

23 Jan '17

Hi, We're repeatedly facing a live migration issue with Windows guests, would be great if someone could send their thoughts/suggestions/experience on how to further troubleshoot this. When we live migrate a Windows instance, it gets migrated (guest is running on the destination host), but it eventually internally hangs. From the Windows logs, the operating system has tried to shut down during the live migration. There is no info at all, even at debug level, in libvirt logs. I'm thinking to go with perf kvm or maybe kernel upgrade, but it might be I'm missing something obvious in Windows for this scenario? QEMU 2.0.0 Libvirtd 1.2.2 Host kernel version : 3.13.0-40-generic Windows version: Windows 2012 R2 Has RBD volumes attached driver name='qemu' type='raw' cache='writeback'/, but reproduced also without. Thanks! ![](https://link.nylas.com/open/bi1c6xnw46zc0gy4ozrqerfkk/local-e0bf2fff- 21e6?r=bGlidmlydC11c2Vyc0ByZWRoYXQuY29t)

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[libvirt-users] gluster store and autostart - but fails
by lejeczek 23 Jan '17

23 Jan '17

hi all I've a few guest which work/run perfectly fine, I believe, except for autostart. Configuration of system, gluster and libvirt is pretty regular and not complex. Errors I see: ... failed to initialize gluster connection (src=0x7f9424266350 priv=0x7f94242922b0): Transport endpoint is internal error: Failed to autostart VM 'rhel-work2': failed to initialize gluster connection (src=0x7f9 failed to initialize gluster connection (src=0x7f942423fef0 priv=0x7f9424256320): Transport endpoint is internal error: Failed to autostart VM 'rhel-work3': failed to initialize gluster connection (src=0x7f9 failed to initialize gluster connection (src=0x7f9424261b20 priv=0x7f94242a18b0): Transport endpoint is internal error: Failed to autostart VM 'rhel-work1': failed to initialize gluster connection (src=0x7f9 ... I tried to make systemd libvirtd to wait for gluster: After=glusterd.service but if that's all required then, well, still fails. Would you have any suggestions? Many thanks, L.

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[libvirt-users] Controlling the name of the 'tap0' device, in a bridged networking setup
by Govert 22 Jan '17

22 Jan '17

Hi, I'm trying to control the name of the 'tap0' device that gets created as I start a domain that uses bridged networking. The XML specification of the domain contains the following configuration <interface type='bridge'> <source bridge='br0'/> </interface> The libvirt documentation ( http://libvirt.org/formatdomain.html#elementsNICSBridge) and other discussions online tell me that I just need to include the <target dev='desired_dev_name'/> tag in the XML specification of the domain under the <interface> tag. Unfortunately doing so appears to have no effect; the tun device created and 'enslaved' in the bridge is still called 'tap0'. Interestingly, I never get a tun device with a name prefixed by 'vnet' or 'vif' which, according to the documentation, is the default behaviour (?). The host is running CentOS 7, and virsh is used to start the domain. Best, Govert

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[libvirt-users] io=native & io=threads
by W Kern 18 Jan '17

18 Jan '17

Googling provides lots of interesting info on the use of these in various situations such as SSD, number of VMs in the pool etc. What is the default in Libvirt (or is the default 'neither') Sincerely W Kern

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[libvirt-users] Regarding Migration Statistics
by Anubhav Guleria 14 Jan '17

14 Jan '17

Greetings, I am writing a code using libvirt API to migrate VM between two physical hosts *(QEMU/KVM) , *say some *n *number of times. *1)* I am using right now* virDomainPtr virDomainMigrate (.......) *and to calculate the total migration time I am using something like this: *clock_gettime(CLOCK_MONOTONIC_RAW,&begin); * *migrate*(domainToMigrate,nodeToMigrate); *clock_gettime(CLOCK_MONOTONIC_RAW,&end);* *Total Migration Time = end.tv_sec-begin.tv_sec* Is this correct way to calculate total migration time. And is there some way to calculate the downtime (not how to set it)? *2) *I am interested in identifying in particular other statistics of migration like : *Number of iterations in Pre Copy*, *Memory transferred in each iteration* etc. I was going through the API and found* virDomainJobInfo <http://libvirt.org/html/libvirt-libvirt-domain.html#virDomainJobInfo> and virDomainGetJobStats <http://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetJobStats> *functions.But how to use them is not very clear. Can anyone point me to right place to achieve this objective? Thanks in advance. And sorry if that was too silly to ask. Anubhav

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[libvirt-users] changing to cache='none' on the fly?
by W Kern 10 Jan '17

10 Jan '17

As is already well documented, we find that we need cache='none' to support migration, otherwise there is the chance of a hang and/or failure to pivot. However we prefer the default of cache=writethrough when operating in production. Our practice is to 'shutdown' the VM completely make the change with virsh edit, then restart. Then we have to repeat the process to revert back once we migrate. Is it possible to change that function on the fly and avoid the shutdown/start process? Note: we have had inconsistent results with virsh edit first and then a reboot. A complete shutdown seems to be necessary, but I am hoping there is some other procedure available. Our images are all qcow2 (1.1) Sincerely, W Kern PixelGate Networks

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[libvirt-users] 回复： [libvirt] xml config nested
by 放牛班的春天 10 Jan '17

10 Jan '17

thanks your mail，now below： If the KVM supports nested VMX and QEMU starts with the arguments -enable-kvm and -cpu ..., + vmx, then the LOCK bit of the guest MSR_IA32_FEATURE_CONTROL and Enable VMX out of SMX operation bit will be set. Well, I should add -enable-kvm parameters of the document which xml position, Exactly speaking, how to amend xml configuration file? ------------------ 原始邮件 ------------------ 发件人: "Daniel P. Berrange";<berrange(a)redhat.com>; 发送时间: 2017年1月5日(星期四) 晚上8:53 收件人: "放牛班的春天"<446844717(a)qq.com>; 抄送: "libvirt-users"<libvirt-users(a)redhat.com>; 主题: Re: [libvirt] xml config nested NB, in future please don't CC all possible mailing lists at once. Just pick the most appropriate mailing list for your question. I've dropped libvirt-list & libvirt-announce from the CC, since this is a question most suited for libvirt-users. On Thu, Jan 05, 2017 at 11:44:29AM +0800, 放牛班的春天 wrote: > How to configure libvirt, so qemu-kvm support nested virtualization, virtual machine installed operating system is windows_7_ultimate_sp1_x64_dvd_618537.iso, configure libvirt xml file is as follows: > > <cpu mode='custom' match='exact'> > <model fallback='allow'>core2duo</model> > <feature policy='require' name='vmx'/> > </cpu> > > > or > > <cpu mode='host-model'> > <model fallback='allow'/> > </cpu> > > or > <cpu mode='host-passthrough'> > <topology sockets='2' cores='2' threads='2'/> > </cpu> Yes, that's the key guest configuration step - exposing the 'vmx' feature to the guest. In addition to that though, you need to make sure the kvm-intel kernel module in your host has the "nested=1" parameter set. eg in /etc/modprobe.d/kvm.conf you want options kvm_intel nested=1 If loaded correctly you should see # cat /sys/module/kvm_intel/parameters/nested Y if it says "N", then nested VMX will be disabled. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://entangle-photo.org -o- http://search.cpan.org/~danberr/ :|

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[libvirt-users] xml config nested
by 放牛班的春天 10 Jan '17

10 Jan '17

How to configure libvirt, so qemu-kvm support nested virtualization, virtual machine installed operating system is windows_7_ultimate_sp1_x64_dvd_618537.iso, configure libvirt xml file is as follows: <cpu mode='custom' match='exact'> <model fallback='allow'>core2duo</model> <feature policy='require' name='vmx'/> </cpu> or <cpu mode='host-model'> <model fallback='allow'/> </cpu> or <cpu mode='host-passthrough'> <topology sockets='2' cores='2' threads='2'/> </cpu> We install libvirt in centos 7, qemu-kvm version is: [Root @ localhost libexec] # ./qemu-kvm --version QEMU emulator version 2.6.0 (qemu-kvm-ev-2.6.0-27.1.el7), Copyright (c) 2003-2008 Fabrice Bellard Above is the basic environment and libvirt configuration, but in this environment to install the internal implementation of the following windows7 virtual machine kernel interface calls are as follows: if (!FeatrueControlMsr.fields.enable_vmxon) { MyWriteFile(FileHanle, "Bios设置没有开启虚拟化\n", strlen("Bios设置没有开启虚拟化\n"), &ReturnLen); MyCloseFile(FileHanle); KdPrint(("Bios设置没有开启虚拟化")); return FALSE; } in conclusion: Through this kernel interface to determine the result is: Bios settings do not turn on virtualization How to solve this problem? Hope to get your help. thank you very much。

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[libvirt-users] Regarding Migration Code
by Anubhav Guleria 09 Jan '17

09 Jan '17

Greetings, I was trying to understand the flow of Migration Code in libvirt and have few doubts: 1) libvirt talks to QEMU/KVM guests via QEMU API. So overall, in order to manage QEMU/KVM guests I can either use libvirt (or tools based on libvirt like virsh) or QEMU monitor. Is it so? 2) Since libvirt is Hypervisor neutral so actual migration algorithm(precopy or postcopy) is present in the hypervisor ,i.e. in case of QEMU it should be present in QEMU code base . I was going through the code starting from libvirt-domain api and not able to follow after virDomainMigrateVersion3Full(.....) . Kindly help. Thanks in advance. And sorry if that was too basic. Anubhav

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[libvirt-users] libvirtError: block copy still active: disk not ready for pivot yet
by Ala Hino 05 Jan '17

05 Jan '17

Hi guys, When performing live merge, in few cases, we see the following exception: Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 736, in wrapper return f(*a, **kw) File "/usr/share/vdsm/virt/vm.py", line 5278, in run self.tryPivot() File "/usr/share/vdsm/virt/vm.py", line 5247, in tryPivot ret = self.vm._dom.blockJobAbort(self.drive.name, flags) File "/usr/share/vdsm/virt/virdomain.py", line 68, in f ret = attr(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 124, in wrapper ret = f(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 1313, in wrapper return func(inst, *args, **kwargs) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 733, in blockJobAbort if ret == -1: raise libvirtError ('virDomainBlockJobAbort() failed', dom=self) libvirtError: block copy still active: disk 'vdb' not ready for pivot yet That exception observed in following BZs: https://bugzilla.redhat.com/1376580 https://bugzilla.redhat.com/1397122 I am trying to understand what this exception indicates in order to handle it appropriately when thrown by libvirt. Thanks, Ala

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[libvirt-users] how to configure seabios with libvirt
by dw 05 Jan '17

05 Jan '17

Hi: Anyone knows how to configure seabios with libvirt? Or Can I configure seabios in XML file? I know that could configre seabios with "qemu-system-x86_64 -fw_cfg",but how to with libvirt? thanks! dw

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[libvirt-users] Virsh Fail to Connect to Hypervisor
by Xu, Rongjie (Nokia - CN/Hangzhou) 05 Jan '17

05 Jan '17

Hi, I am upgrading libvirt from 1.2.9 to 2.0.0 and I have successfully make the libvirtd running. However, virsh cannot connect to hypervisor with following errors: virsh # connect error: failed to connect to the hypervisor root@node-55:/usr/local# virsh -c 'qemu:///system' connect error: failed to connect to the hypervisor error: no connection driver available for qemu:///system Can you give me some suggestion about where will be the problem. Thanks. libvirtd is running: root@node-55:/usr/lib/python2.7/dist-packages# ps aux | grep -i libvirtd root 1246963 0.0 0.0 1245780 3428 ? Ssl 06:04 0:00 /usr/sbin/libvirtd --config /etc/libvirt/libvirtd.conf -l Best Regards Xu Rongjie (Max) Mobile:18658176819

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[libvirt-users] Default firewall rules and forwarding to a guest
by Omer Aldemir 04 Jan '17

04 Jan '17

Hello, I am trying to understand how libvirt firewall rules are loaded as I have firewalld and iptables services are disabled. Where is the configuration files for firewall and NAT rules for libvirt? How can I load default firewall rules if I mess things up Also I have realized that followings is default ACCEPT all -- 0.0.0.0/0 192.168.122.0/24 ctstate RELATED,ESTABLISHED but If I am to forward a port for a real IP to internal guest machine I need ACCEPT all -- 0.0.0.0/0 192.168.122.0/24 state NEW,RELATED,ESTABLISHED (NEW state is required) and also of course a forwarding rule iptables -t nat -I PREROUTING -p tcp --dport 3389 -j DNAT --to-destination 192.168.122.16:3389 Is there a place I can make this rules static with LibVirt (not playing with firewalld and/or iptables service for Centos 7) Regards.

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