[libvirt-users] [libvirt] [LXC] Tyring to locate livbvirt operations for LXC relocation
by Avi Weit
Hello,
I am searching for the libvirt operations for relocating LXC (system or
application) containers. LXC relocation mechanism is done by checkpoint /
restart. I went over libvirt API documentation and found the following
methods:
virDomainSave that receives a domain and path to state file. The method
saves domain's memory contents into a disk file.
virDomainRestore that receives a domain and path to state file. The method
restores the domain from the state file created by save operation.
Are these the proper methods to use for LXC relocation? I assume I can also
use the corresponding operations via virsh (save / restore)..
>From looking into lxcDriver object (defined under /src/lxc/xlc_driver.c in
libvirt server source) I can see that NULLs are set in save and restore
methods. Does that mean that there is no support for saving and restoring
Linux containers? Is there a libvirt patch beyond the kernel patch that
needs to be applied?
I am using libvirt 0.7.5 and kernel 2.6.31
/* Function Tables */
static virDriver lxcDriver = {
VIR_DRV_LXC, /* the number virDrvNo */
"LXC", /* the name of the driver */
lxcOpen, /* open */
lxcClose, /* close */
NULL, /* supports_feature */
NULL, /* type */
lxcVersion, /* version */
NULL, /* libvirtVersion (impl. in libvirt.c) */
virGetHostname, /* getHostname */
NULL, /* getMaxVcpus */
nodeGetInfo, /* nodeGetInfo */
lxcGetCapabilities, /* getCapabilities */
lxcListDomains, /* listDomains */
lxcNumDomains, /* numOfDomains */
lxcDomainCreateAndStart, /* domainCreateXML */
lxcDomainLookupByID, /* domainLookupByID */
lxcDomainLookupByUUID, /* domainLookupByUUID */
lxcDomainLookupByName, /* domainLookupByName */
lxcDomainSuspend, /* domainSuspend */
lxcDomainResume, /* domainResume */
lxcDomainShutdown, /* domainShutdown */
NULL, /* domainSave */
NULL, /* domainRestore */
NULL, /* domainMigratePrepare */
NULL, /* domainMigratePerform */
NULL, /* domainMigrateFinish */
...
...
Thanks,
- Avi
14 years, 8 months
[libvirt-users] connect libvirt and virtualbox
by angelo alfano
conn = libvirt.open("vbox:///session")
return this error:
libvir: VBOX error : internal error unable to initialize VirtualBox driver API
Traceback (most recent call last):
File "prova.py", line 5, in <module>
conn = libvirt.open("vbox:///session")
File "/usr/lib/python2.6/dist-packages/libvirt.py", line 163, in open
if ret is None:raise libvirtError('virConnectOpen() failed')
libvirt.libvirtError: internal error unable to initialize VirtualBox driver API
why?
14 years, 8 months
[libvirt-users] advice on creating and reusing connections
by jeremy avnet
Are there any recommendations as to how often a new connection should be
made versus reused? Right now we create a new connection *every time* we hit
libvirt for something. We can easily change this so that a single connection
is made for a series of libvirt calls, or even so that a single connection
is used for the lifetime of the running application.
What are the issues to consider when making these choices?
We are connecting to qemu:///system.
Thank you.
.:. brainsik
14 years, 9 months
[libvirt-users] connection creating
by jeremy avnet
Are there any recommendations as to how often a new connection should be
made versus reused? Right now we create a new connection *every time* we hit
libvirt for something. We can easily change this so that a single connection
is made for a series of libvirt calls, or even so that a single connection
is used for the lifetime of the running application.
What are the issues to consider when making these choices?
We are connecting to qemu:///system.
Thank you.
.:. brainsik
14 years, 9 months
[libvirt-users] libvirt connections
by brandlk＠mathematik.uni-marburg.de
Hello,
I'm working with libvirt version 0.7.7 and encountered some problems with
ssh connections to the xen hypervisor:
- if the hypervisor is not running libvirt.open("xen+ssh://host") doesn't
time out put keeps trying to connect to host on port 8000.
I've tried with the following test program:
try:
conn = libvirt.open("xen+ssh://host")
except:
print "failed"
sys.exit(1)
However: after aborting the program with Ctrl-C I get the exception.
- I want to close all libvirt connections at the end, but closing the
connections does not close the ssh - nc connections libvirt opens in the
background to talk to the hypervisor. I have to manually delete all domain
objects as well to get the pending ssh - nc connections closed. I can keep
on using the domain object, even if I closed the connection before.
Is this behaviour intended?
Any help would be great.
K. Haselhorst
14 years, 9 months
[libvirt-users] Vserver patch for Libvirt
by Chaitra Gorantla
Hi all,
I am using libvirt for managing KVM. I would also like to manage Vserver also using libvirt.
Is there any patch available for vserver ? When will libvirt relase official patch for vserver?
Thanks,
Chaitra
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14 years, 9 months
[libvirt-users] Attach-interface vs attach-device
by steven765＠yahoo.com
Working with the two commands there's a noticeable difference in the time redhat takes to detect interfaces using attach-interface vs attach-device? About 5-8 seconds using attach interface, and near instant with attach-device.
That little bit aside, I'm trying to find a way to 'unplug' a VM without actually removing the interface.
The easy fix is to attach it without adding the tap interface to mybridge, but attach device and interface do not allow this.
Looking in the source for libvirt I found the InterfacesStartmodeDefFormat however it seems that virsh doesn't export this option. Maybe this just needs to be implemented?
Might anyone have insights as to the best method to pursue?
I'm willing to do the leg work but I'm just starting to look into how the sources are laid out and that's going to take a bit. Pointers are appreciated.
Thanks in advance,
Steve
14 years, 9 months
[libvirt-users] CfP with Extended Deadline 5th Workshop on Virtualization in High-Performance Cloud Computing (VHPC'10)
by Michael Alexander
Apologies if you received multiple copies of this message.
=================================================================
CALL FOR PAPERS
5th Workshop on
Virtualization in High-Performance Cloud Computing
VHPC'10
as part of Euro-Par 2010, Island of Ischia-Naples, Italy
=================================================================
Date: August 31, 2010
Euro-Par 2009: http://www.europar2010.org/
Workshop URL: http://vhpc.org
SUBMISSION DEADLINE:
Abstracts: April 4, 2010 (extended)
Full Paper: June 19, 2010 (extended)
Scope:
Virtualization has become a common abstraction layer in modern data
centers, enabling resource owners to manage complex infrastructure
independently of their applications. Conjointly virtualization is
becoming a driving technology for a manifold of industry grade IT
services. Piloted by the Amazon Elastic Computing Cloud services, the
cloud concept includes the notion of a separation between resource
owners and users, adding services such as hosted application
frameworks and queuing. Utilizing the same infrastructure, clouds
carry significant potential for use in high-performance scientific
computing. The ability of clouds to provide for requests and releases
of vast computing resource dynamically and close to the marginal cost
of providing the services is unprecedented in the history of
scientific and commercial computing.
Distributed computing concepts that leverage federated resource access
are popular within the grid community, but have not seen previously
desired deployed levels so far. Also, many of the scientific
datacenters have not adopted virtualization or cloud concepts yet.
This workshop aims to bring together industrial providers with the
scientific community in order to foster discussion, collaboration and
mutual exchange of knowledge and experience.
The workshop will be one day in length, composed of 20 min paper
presentations, each followed by 10 min discussion sections.
Presentations may be accompanied by interactive demonstrations. It
concludes with a 30 min panel discussion by presenters.
TOPICS
Topics include, but are not limited to, the following subjects:
- Virtualization in cloud, cluster and grid HPC environments
- VM cloud, cluster load distribution algorithms
- Cloud, cluster and grid filesystems
- QoS and and service level guarantees
- Cloud programming models, APIs and databases
- Software as a service (SaaS)
- Cloud provisioning
- Virtualized I/O
- VMMs and storage virtualization
- MPI, PVM on virtual machines
- High-performance network virtualization
- High-speed interconnects
- Hypervisor extensions
- Tools for cluster and grid computing
- Xen/other VMM cloud/cluster/grid tools
- Raw device access from VMs
- Cloud reliability, fault-tolerance, and security
- Cloud load balancing
- VMs - power efficiency
- Network architectures for VM-based environments
- VMMs/Hypervisors
- Hardware support for virtualization
- Fault tolerant VM environments
- Workload characterizations for VM-based environments
- Bottleneck management
- Metering
- VM-based cloud performance modeling
- Cloud security, access control and data integrity
- Performance management and tuning hosts and guest VMs
- VMM performance tuning on various load types
- Research and education use cases
- Cloud use cases
- Management of VM environments and clouds
- Deployment of VM-based environments
PAPER SUBMISSION
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 the Springer LNCS series - the
format must be according to the Springer LNCS Style. Initial
submissions are in PDF, accepted papers will be requested to provided
source files.
Format Guidelines: http://www.springer.de/comp/lncs/authors.html
Submission Link: http://edas.info/newPaper.php?c=8553
IMPORTANT DATES
April 4 - Abstract submission due (extended)
May 19 - Full paper submission (extended)
July 14 - Acceptance notification
August 3 - Camera-ready version due
August 31 - September 3 - conference
CHAIR
Michael Alexander (chair), scaledinfra technologies GmbH, Austria
Gianluigi Zanetti (co-chair), CRS4, Italy
PROGRAM COMMITTEE
Padmashree Apparao, Intel Corp., USA
Volker Buege, University of Karlsruhe, Germany
Roberto Canonico, University of Napoli Federico II, Italy
Tommaso Cucinotta, Scuola Superiore Sant'Anna, Italy
Werner Fischer, Thomas Krenn AG, Germany
William Gardner, University of Guelph, Canada
Wolfgang Gentzsch, DEISA. Max Planck Gesellschaft, Germany
Derek Groen, UVA, The Netherlands
Marcus Hardt, Forschungszentrum Karlsruhe, Germany
Sverre Jarp, CERN, Switzerland
Shantenu Jha, Louisiana State University, USA
Xuxian Jiang, NC State, USA
Kenji Kaneda, Google, Japan
Yves Kemp, DESY Hamburg, Germany
Ignacio Llorente, Universidad Complutense de Madrid, Spain
Naoya Maruyama, Tokyo Institute of Technology, Japan
Jean-Marc Menaud, Ecole des Mines de Nantes, France
Anastassios Nano, National Technical University of Athens, Greece
Oliver Oberst, Karlsruhe Institute of Technology, Germany
Jose Renato Santos, HP Labs, USA
Borja Sotomayor, University of Chicago, USA
Yoshio Turner, HP Labs, USA
Kurt Tuschku, University of Vienna, Austria
Lizhe Wang, Indiana University, USA
Chao-Tung Yang, Tunghai University, Taiwan
DURATION: Workshop Duration is one day.
GENERAL INFORMATION
The workshop will be held as part of Euro-Par 2010,
Island of Ischia-Naples, Italy.
Euro-Par 2010: http://www.europar2010.org/
14 years, 9 months
Re: [libvirt-users] Problem attaching device
by steven765＠yahoo.com
Thanks, but problem still persists. I actually fat fingered entering it the first time
The xmlfile really is:
<?xml version="1.0"?>
<interface type="network">
<mac address="52:54:00:5c:fe:a8"/>
<source network="default"/>
<target dev="vnet1"/>
</interface>
I ran xmllint and it just says no DTD specified, however this works perfectly if i use the attach-device command in virsh. I tired it both with and without the first line version=1.0
I try running it through python and boom, is there something else I'm missing? I can't find any documentation about the overall libvirt xml schema.
Thanks again,
Steve
--- On Thu, 3/25/10, Daniel Veillard <veillard(a)redhat.com> wrote:
> From: Daniel Veillard <veillard(a)redhat.com>
> Subject: Re: [libvirt-users] Problem attaching device
> To: steven765(a)yahoo.com
> Cc: "Matthias Bolte" <matthias.bolte(a)googlemail.com>, libvirt-users(a)redhat.com
> Date: Thursday, March 25, 2010, 9:18 AM
> On Wed, Mar 24, 2010 at 11:18:10PM
> +0100, Matthias Bolte wrote:
> > 2010/3/24 <steven765(a)yahoo.com>:
> > Your XML is really not well formed. This
> >
> > <source network-'default'/>
> >
> > should be
> >
> > <source network='default'/>
> >
> > > target dev='vnet1'/>
> >
> > And you miss a < before the word target:
> >
> > target dev='vnet1'/>
> >
> > should be
> >
> > <target dev='vnet1'/>
> >
> > > </interface>
> > >
> > > I've tired giving it the full path still no
> luck.
> > > Thanks in advance,
>
> use xmllint to check XML instances if you're not
> sure
>
> xmllint net.xml
>
> Daniel
>
> --
> Daniel Veillard | libxml Gnome XML XSLT
> toolkit http://xmlsoft.org/
> daniel(a)veillard.com
> | Rpmfind RPM search engine http://rpmfind.net/
> http://veillard.com/ | virtualization library http://libvirt.org/
>
14 years, 9 months
