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[libvirt-users] CfP 12th Virtualization in High-Performance Cloud Computing Workshop (VHPC '17)
by VHPC 17 31 Jan '17

31 Jan '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 31 Jan '17

31 Jan '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 25 Jan '17

25 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 21 Jan '17

21 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 17 Jan '17

17 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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