- Users - libvirt List Archives

[libvirt-users] Network hooks for ethernet interfaces
by Ruben Kerkhof 12 Apr '19

12 Apr '19

Hi all, I have a hook script, /etc/libvirt/hooks/network, that doesn't seem to be called when I attach an interface with type 'ethernet' with this xml snippet: <interface type='ethernet'> <model type="virtio"/> <source> <ip address="10.100.0.1" prefix="24" peer="10.100.0.10"/> </source> </interface> https://www.libvirt.org/hooks.html#intro says "A network is started or stopped or an interface is plugged/unplugged to/from the network (since 1.2.2)". While I don't have a network defined in xml, I'd expect this to work just as well for 'ethernet' type interfaces. Am I wrong? Kind regards, Ruben Kerkhof

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[libvirt-users] CGroup V2 Support
by ITeng A 10 Apr '19

10 Apr '19

Dear all Does the current version of libvirt support the new cgroup v2 ? I am running KVM qemu VMs on Ubuntu with linux Kernel 4.18 with cgroup v1 and I would like to use Cgroup v2 but we I mount cgroup v2 the libvirt virtualization daemon fail to start with error message that it cant create cgroup /system.slice/libvirtd.service no such file or directory. kind regards, Asraa Ali

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[libvirt-users] Guest interface names not same as configured name
by PR PR 07 Apr '19

07 Apr '19

Hi, I am creating a guest with following description for interfaces in the xml using virsh create xml command. For some reason, the guest interface names in the VM dont match the names specified in the xml. Is there a way to make guest interface names predictable? Following is the qemu version on host dpkg --list | grep -i qemu ii qemu-kvm 1:2.11+dfsg-1ubuntu7.10 amd64 QEMU Full virtualization on x86 hardware <interface type='user'> <mac address='52:54:00:17:0b:e7'/> <guest dev='eth0'/> <model type='e1000'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <interface type='ethernet'> <mac address='52:54:00:ee:70:34'/> <target dev='net0'/> <guest dev='Ethernet0'/> <model type='rtl8139'/> <alias name='net1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </interface> Thanks

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[libvirt-users] Cannot create PID file
by Nicolás Iglesias 06 Apr '19

06 Apr '19

Hi Fellow users I've just compiled latest libvirt and qemu, both from their respective official repositories. Libvirtd starts perfect, but when I try to start a domain using the virsh console, I get the following: virsh # start --domain win8.1 error: Failed to start domain win8.1 error: internal error: Failed to start QEMU binary /usr/bin/qemu-system-x86_64 for probing: qemu-system-x86_64: cannot create PID file: Cannot open pid file: Permission denied I'm not sure where to look at. Any hint would be much appreciated. Regards, Nicolas Iglesias

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[libvirt-users] Schema
by Maximilian Schieder 06 Apr '19

06 Apr '19

Hey, Is there a Schema of creating a VM (Domain)? Something like: Create Storagepool Init Storagepool Maxi

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[libvirt-users] is it possible to create a snapshot from a guest residing in a plain partition ?
by Lentes, Bernd 04 Apr '19

04 Apr '19

Hi, i can store the disk of a guest in a plain partition which isn't formatted. That's no problem, i did it already several times, although the promised speed increase didn't appear. But is it possible to create from such a guest a snapshot in a .sn file using virsh ? Regards, Bernd -- Bernd Lentes Systemadministration Institut für Entwicklungsgenetik Gebäude 35.34 - Raum 208 HelmholtzZentrum münchen bernd.lentes(a)helmholtz-muenchen.de phone: +49 89 3187 1241 phone: +49 89 3187 3827 fax: +49 89 3187 2294 http://www.helmholtz-muenchen.de/idg wer Fehler macht kann etwas lernen wer nichts macht kann auch nichts lernen Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) Ingolstaedter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDirig'in Petra Steiner-Hoffmann Stellv.Aufsichtsratsvorsitzender: MinDirig. Dr. Manfred Wolter Geschaeftsfuehrung: Prof. Dr. med. Dr. h.c. Matthias Tschoep, Heinrich Bassler, Kerstin Guenther Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671

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[libvirt-users] SEV machines and memory pinning
by Boris Bobrov 04 Apr '19

04 Apr '19

Hello, I am working on implementing SEV support in OpenStack. There are some questions that came up in the discussion of the spec [0] [0] https://review.openstack.org/#/c/641994/ As far as i understand, the memory for SEV machines need to be pinned so that it doesn't migrate to swap and page migration. ROMS, UEFI pflash and video RAM should be pinned too. Initially we planned to use hard_limit of <memtune> element to pin the memory. However, from the discussion in the spec it seems that there is no way to determine a good enough value and that hard_limit should not be used at all. What should be used then? There is a suggestion to use something like this: <memoryBacking> <hugepages> <page size="2" unit="M" nodeset="1"/> </hugepages> <nosharepages/> <locked/> <source type="file"/> <access mode="shared"/> <allocation mode="immediate"/> </memoryBacking> Will it work? Are there any caveats we should remember about with this config? If we can use it, is there anything that would be redundant or not necessary for our case?

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[libvirt-users] CfP VHPC19: HPC Virtualization-Containers: Paper due May 1, 2019 (extended)
by VHPC 19 03 Apr '19

03 Apr '19

==================================================================== CALL FOR PAPERS 14th Workshop on Virtualization in High-Performance Cloud Computing (VHPC '19) held in conjunction with the International Supercomputing Conference - High Performance, June 16-20, 2019, Frankfurt, Germany. (Springer LNCS Proceedings) ==================================================================== Date: June 20, 2019 Workshop URL: http://vhpc.org Paper Submission Deadline: May 1, 2019 (extended) Springer LNCS, rolling abstract submission Abstract/Paper Submission Link: https://edas.info/newPaper.php?c=25685 Call for Papers Containers and virtualization technologies constitute key enabling factors 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-containerization 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; lastly, unikernels provide for many virtualization benefits with a minimized OS/library surface. I/O Virtualization in turn allows physical network interfaces 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 is furthermore enabling virtualization of HPC infrastructures. 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, containers-virtualization and the cloud. Major Topics: - HPC on Containers and VMs - Containerized applications with OS-level virtualization - Lightweight applications with Unikernels - HP-as-a-Service each major topic encompassing design/architecture, management, performance management, modeling and configuration/tooling: Design / Architecture: - Containers and OS-level virtualization (LXC, Docker, rkt, Singularity, Shifter, i.a.) - Hypervisor support for heterogeneous resources (GPUs, co-processors, FPGAs, etc.) - Hypervisor extensions to mitigate side-channel attacks ([micro-]architectural timing attacks, privilege escalation) - VM & Container trust and security models - Multi-environment coupling, system software supporting in-situ analysis with HPC simulation - Cloud reliability, fault-tolerance and high-availability - Energy-efficient and power-aware virtualization - Containers inside VMs with hypervisor isolation - Virtualization support for emerging memory technologies - Lightweight/specialized operating systems in conjunction with virtual machines - Hypervisor support for heterogeneous resources (GPUs, co-processors, FPGAs, etc.) - Novel unikernels and use cases for virtualized HPC environments - ARM-based hypervisors, ARM virtualization extensions Management: - Container and VM management for HPC and cloud environments - HPC services integration, services to support HPC - Service and on-demand scheduling & resource management - Dedicated workload management with VMs or containers - Workflow coupling with VMs and containers - Unikernel, lightweight VM application management - Environments and tools for operating containerized environments (batch, orchestration) - Novel models for non-HPC workload provisioning on HPC resources Performance Measurements and Modeling: - Performance improvements for or driven by unikernels - Optimizations of virtual machine monitor platforms and hypervisors - Scalability analysis of VMs and/or containers at large scale - Performance measurement, modeling and monitoring of virtualized/cloud workloads - Virtualization in supercomputing environments, HPC clusters, HPC in the cloud Configuration / Tooling: - Tool support for unikernels: configuration/build environments, debuggers, profilers - Job scheduling/control/policy and container placement in virtualized environments - Operating MPI in containers/VMs and Unikernels - Software defined networks and network virtualization - GPU virtualization operationalization 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 May 1, 2019 - Abstract/Paper extended submission deadline (Springer LNCS) May 20, 2019 - Acceptance notification June 20th, 2019 - Workshop Day July 10th, 2019 - Camera-ready version due Chair Michael Alexander (chair), University of Vienna, Austria Anastassios Nanos (co-chair), SunLight.io, UK Andrew Younge (co-chair), Sandia National Laboratories Program committee Stergios Anastasiadis, University of Ioannina, Greece Jakob Blomer, CERN, Europe Eduardo César, Universidad Autonoma de Barcelona, Spain Taylor Childers, Argonne National Laboratory, USA Stephen Crago, USC ISI, USA Tommaso Cucinotta, St. Anna School of Advanced Studies, Italy Christoffer Dall, Columbia University, USA François Diakhaté, CEA, France Patrick Dreher, MIT, USA Kyle Hale, Northwestern University, USA Bob Killen, University of Michigan, USA Brian Kocoloski, Washington University, USA John Lange, University of Pittsburgh, USA 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, Western New England University, USA Carlos Reaño, Queen’s University Belfast, UK Borja Sotomayor, University of Chicago, USA Jonathan Sparks, Cray, USA Joe Stubbs, Texas Advanced Computing Center, USA Anata Tiwari, San Diego Supercomputer Center, USA Kurt Tutschku, Blekinge Institute of Technology, Sweden John Walters, USC ISI, USA Yasuhiro Watashiba, Osaka University, Japan Chao-Tung Yang, Tunghai University, Taiwan Na Zhang, VMware, USA 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, keywords, 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.springernature.com/cs-proceeding/llncs/llncs2e.zip Abstract, Paper Submission Link: https://edas.info/newPaper.php?c=25685 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) 2019, June 16-20, Frankfurt, Germany.

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[libvirt-users] Clock skew on Win10
by Alex 03 Apr '19

03 Apr '19

Hi, I'm having a problem with significant clock skew on fedora29 with qemu-system-x86-3.0.0 and ibvirt-daemon-kvm-4.7.0. This is on my desktop and appears to happen between suspends of the host each night. It appears like the time just stops while the guest is suspended, of course, but then doesn't update once the guest is resumed. I'm pretty sure time is configured correctly on the Win10 guest. It's configured to be set according to Internet time and syncs with time.windows.com. How do I troubleshoot this further?

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[libvirt-users] Error creating virtual network: failed to run '/usr/sbin/dnsmasq --version': : Success
by Harsh Gondaliya 01 Apr '19

01 Apr '19

I deleted my port virbr0 using brctl command and now when I want to create a virtual network, it gives me this error: Error creating virtual network: failed to run '/usr/sbin/dnsmasq --version': : Success Here is my systemlog: https://pastebin.com/xjuVnsyL How to rectify this?

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