May 2012 - Users - libvirt List Archives

[libvirt-users] Libvirt LXC and VCPU?
by Samuel Hassine 07 May '12

07 May '12

Hi, We are using Openstack and Libvirt/LXC as our virtualization endpoint. Here is an example of one of our libvirt domain: http://paste.debian.net/167276/ So we have <vcpu>4</vcpu>. But the command : root@PAR-SRV-02-MASTER:/etc/libvirt/lxc# virsh --connect lxc:/// dominfo instance-0000004a Id: 17495 Name: instance-0000004a UUID: d600b83f-6d34-4a08-b905-b9daf67ac7f7 OS Type: exe State: running CPU(s): 1 CPU time: 25886.4s Max memory: 4194304 kB Used memory: 140272 kB Persistent: yes Autostart: disable Managed save: unknown give only "1" CPU. Is it normal? Best regards. Sam

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[libvirt-users] printing domain information
by John Wayne 07 May '12

07 May '12

how do i print the features of a domain from functions that return a domain object? for instance mydomain = virdomain=libvirt.virConnect.lookupByID(conn,domainid) so mydomain is virDomainPtr, which is typedef virDomain * virDomainPtr i am not sure on how to print the domain object features in python, such as name, disk size, etc

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[libvirt-users] Submission Deadline Extension
by VHPC 12 06 May '12

06 May '12

we apologize if you receive multiple copies of this CFP =================================================================== CALL FOR PAPERS 7th Workshop on Virtualization in High-Performance Cloud Computing VHPC '12 as part of Euro-Par 2012, Rhodes Island, Greece =================================================================== Date: August 28, 2012 Workshop URL: http://vhpc.org SUBMISSION DEADLINE: June 11, 2012 - Full paper submission (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. The cloud concept includes the notion of a separation between resource owners and users, adding services such as hosted application frameworks and queueing. 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 resources 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 data centers 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. TOPICS Topics of interest include, but are not limited to: Higher-level cloud architectures, focusing on issues such as: - Languages for describing highly-distributed compute jobs - Workload characterization for VM-based environments - Optimized communication libraries/protocols in the cloud - Cross-layer optimization of numeric algorithms on VM infrastructure - System and process/bytecode VM convergence - Cloud frameworks and API sets - Checkpointing/migration of large compute jobs - Instrumentation interfaces and languages - VMM performance (auto-)tuning on various load types - Cloud reliability, fault-tolerance, and security - Software as a Service (SaaS) architectures - Research and education use cases - Virtualization in cloud, cluster and grid environments - Cross-layer VM optimizations - Cloud use cases including optimizations - VM-based cloud performance modelling - Performance and cost modelling Lower-level design challenges for Hypervisors, VM-aware I/O devices, hardware accelerators or filesystems in VM environments, especially: - Cloud, grid and distributed filesystems - Hardware for I/O virtualization (storage/network/accelerators) - Storage and network I/O subsystems in virtualized environments - Novel software approaches to I/O virtualization - Paravirtualized I/O subsystems for modified/unmodified guests - Virtualization-aware cluster interconnects - Direct device assignment - NUMA-aware subsystems in virtualized environments - Hardware Accelerators in virtualization (GPUs/FPGAs) - Hardware extensions for virtualization - VMMs/Hypervisors for embedded systems Data Center management methods, including: - QoS and and service levels - VM cloud and cluster distribution algorithms - VM load-balancing in Clouds - Hypervisor extensions and tools for cluster and grid computing - Fault tolerant VM environments - Virtual machine monitor platforms - Management, deployment and monitoring of VM-based environments - Cluster provisioning in the Cloud 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; authors of accepted papers will be requested to provide source files. Format Guidelines: http://www.springer.de/comp/lncs/authors.html Style template: ftp://ftp.springer.de/pub/tex/latex/llncs/latex2e/llncs2e.zip Abstract Submission Link: http://edas.info/newPaper.php?c=11943 IMPORTANT DATES Rolling abstract submission June 11, 2012 - Full paper submission (extended) June 29, 2012 - Acceptance notification July 20, 2012 - Camera-ready version due August 28, 2012 - Workshop Date CHAIR Michael Alexander (chair), TU Wien, Austria Gianluigi Zanetti (co-chair), CRS4, Italy Anastassios Nanos (co-chair), NTUA, Greece PROGRAM COMMITTEE Paolo Anedda, CRS4, Italy Giovanni Busonera, CRS4, Italy Brad Calder, Microsoft, USA Roberto Canonico, University of Napoli Federico II, Italy Tommaso Cucinotta, Alcatel-Lucent Bell Labs, Ireland Werner Fischer, Thomas-Krenn AG, Germany William Gardner, University of Guelph, USA Marcus Hardt, Forschungszentrum Karlsruhe, Germany Sverre Jarp, CERN, Switzerland Shantenu Jha, Louisiana State University, USA Xuxian Jiang, NC State, USA Nectarios Koziris, National Technical University of Athens, Greece Simone Leo, CRS4, Italy Ignacio Llorente, Universidad Complutense de Madrid, Spain Naoya Maruyama, Tokyo Institute of Technology, Japan Jean-Marc Menaud, Ecole des Mines de Nantes, France Dimitrios Nikolopoulos, Foundation for Research&Technology Hellas, Greece Jose Renato Santos, HP Labs, USA Walter Schwaiger, TU Wien, Austria Yoshio Turner, HP Labs, USA Kurt Tutschku, 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 2012. Euro-Par 2012: http://europar2012.cti.gr/

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[libvirt-users] storage-pools and volumes
by John Wayne 06 May '12

06 May '12

hi, i am trying to create a domain using libvirt 0.9.4 python api and i can't find any information on how to use the libvirt python api with linux logical volumes http://libvirt.org/guide/html-single/#Application_Development_Guide-Device_… is TBD i figured out that i need to use defineXML to create a domain, however for the disk part in the xml, i am not sure if i need to create the LVM first, or just specify the LVM path and libvirt will create the lvm for me and stick the domain on the lvm <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vg001/myhost.blah.com'/> <target dev='hda' bus='ide'/> </disk> /usr/lib64/python2.6/site-packages/libvirt.py has: ret = libvirtmod.virStorageVolCreateXML(self._o, xmldesc, flags) if ret is None:raise libvirtError('virStorageVolCreateXML() failed', pool=self) __tmp = virStorageVol(self, _obj=ret) return __tmp however i don't know the xml format for storage vol thanks

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[libvirt-users] maxvcpu
by John Wayne 04 May '12

04 May '12

hi, i am trying to find out the max vcpus supported for any domain by my hypervisor, however i am having some trouble with the below: vcpu=5 maxvcpus=libvirt.virConnect.getMaxVcpus(conn,'kqemu') if maxvcpus <= vcpu: logging.debug('checkmaxvcpus: max vcpus on hypervisor %i is less than requested vcpu of %i' % (maxvcpus, vcpu)) return 0 else: return 1 http://libvirt.org/html/libvirt-libvirt.html#virConnectGetMaxVcpus says that i need: conn:pointer to the hypervisor connection type:value of the 'type' attribute in the <domain> element http://libvirt.org/formatdomain.html says that type is of "The allowed values are driver specific, but include "xen", "kvm", "qemu", "lxc" and "kqemu"." i am using KVM, so i used kqemu, however maxvcpus is always 1, which does not seem right, since i should be able to create a vm with more than 1 vcpu...

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[libvirt-users] Libvirt heavy CPU usage
by Samuel Hassine 04 May '12

04 May '12

Hi there, We are currently using OpenStack with the libvirt driver (libvirt version: 0.9.11.3) and LXC containers. We are observing a really bad CPU usage of libvirt_lxc processes: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 28828 root 20 0 40852 1376 832 R 104.4 0.0 516:44.27 libvirt_lxc 20560 root 20 0 40852 1372 832 R 98.6 0.0 454:42.48 libvirt_lxc 22419 root 20 0 40852 1376 832 R 98.6 0.0 499:16.98 libvirt_lxc 26238 root 20 0 40852 1376 832 R 98.6 0.0 500:42.94 libvirt_lxc 28307 root 20 0 40852 1376 832 R 92.8 0.0 594:16.96 libvirt_lxc 20408 root 20 0 40852 1376 832 R 69.6 0.0 364:21.02 libvirt_lxc 17495 root 20 0 40852 1372 832 R 63.8 0.0 421:40.78 libvirt_lxc 23725 root 20 0 40852 1376 832 R 46.4 0.0 459:03.75 libvirt_lxc 24710 root 20 0 40852 1368 832 R 40.6 0.0 494:30.45 libvirt_lxc 1350 root 20 0 40852 1372 828 R 34.8 0.0 358:49.72 libvirt_lxc But theses domains are not really active, they are just "minimal" virtual engines without any trafic or load. Is it a "normal" way or there is something wrong? Thanks for your answer. Best regards. Sam

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[libvirt-users] free memory on hypervisor
by John Wayne 04 May '12

04 May '12

i am trying to get the free memory on a hypervisor using libvert, with the python api bindings as per http://libvirt.org/python.html, it should be pretty easy, however the below is failing: #conn is a connection object freemem=libvirt.virNode.getFreeMemory(conn) although this works fine: software=libvirt.virConnect.getType(conn) if software == 'QEMU': logging.debug('hypervisor is type QEMU')

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[libvirt-users] communicate with vm
by me,apporc 03 May '12

03 May '12

We need to create many virtual machines and assign an static ip for each of them. To do this, 1. we can use one dhcp server to assign ip for them, and bind the MAC to it's ip. But we got many many machines, so this is not easy to operate for admins. 2. we can just create the vm and then let the client to config the ip from within the operating system. But the client don't want to, and sometimes in fact they should not be authorized to do that. Are there any way else to do this? I mean is there some API for that we can use? or just mount the vm image file and change the network configuration file? If any API for that, can we change the config while the os in the vm is running? Thanks, any help is appreciated.

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[libvirt-users] ESX support for virt-install
by Filip Skola 03 May '12

03 May '12

Hi! I try to integrate ESXi guests to beaker. I'd like to have dynamic installations of guests just like KVM and Xen is done. I know that virt-install is not currently supported by libvirt, so I'd like to ask, do you plan to add esxdrv support for virt-install? What's current status? Thank you, Filip

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[libvirt-users] USB passthrough: flexible configuration in XML-file needed
by eGerlach 03 May '12

03 May '12

Hi, I need a flexible USB passthrough of a USB-device. If the device is turned off by the current switch (230Volt) the VM should start and not claim that the USB device is left. Using: <devices> … <hostdev mode='subsystem' type='usb'> <source> <vendor id='0x152a'/> <product id='0x8180'/> </source> </hostdev> </devices> </domain> in libvirt XML-config file the boot process is stopped if the device is switched off. How can I configure the xml-file to make ich more flexible? Another possibility would be to passthrough USB-Slot No1 (or No 2, ...) to the VM. So an arbitrary USB-device that is plugged in to USB-Slot1 would be recognized by the VM. In another forum I got the hint to start the VM by: -usb -usbdevice host:0.* -usbdevice host:1.* to passthrough USB-Slot No1 and No 2. How can I configure that in libvirt xml-file? tia Eckard

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