[libvirt-users] Cannot create PID file
by Nicolás Iglesias
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
5 years, 6 months
[libvirt-users] Schema
by Maximilian Schieder
Hey,
Is there a Schema of creating a VM (Domain)?
Something like:
Create Storagepool
Init Storagepool
Maxi
5 years, 6 months
[libvirt-users] is it possible to create a snapshot from a guest residing in a plain partition ?
by Lentes, Bernd
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
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5 years, 7 months
[libvirt-users] SEV machines and memory pinning
by Boris Bobrov
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?
5 years, 7 months
[libvirt-users] CfP VHPC19: HPC Virtualization-Containers: Paper due May 1, 2019 (extended)
by VHPC 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.
5 years, 7 months
[libvirt-users] Clock skew on Win10
by Alex
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?
5 years, 7 months
