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[libvirt-users] creation of storage volume fails
by John Wayne 08 May '12

08 May '12

hi, i am getting this error below when i try to create a storage volume: libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0) AttributeError: class virStoragePool has no attribute 'CreateXML' my code is: xmldesc="xml description of storage volume which i got from sudo virsh vol-dumpxml" #get a storage pool object to use in creating a volume storagepoolobject=libvirt.virConnect.storagePoolLookupByName(conn,'poolname') #now try to create the volume using the above storage pool object libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0) from python: -bash-4.1$ python >>> import libvirt >>> dir(libvirt.virStoragePool) ['UUID', 'UUIDString', 'XMLDesc', '__del__', '__doc__', '__init__', '__module__', 'autostart', 'build', 'connect', 'create', 'createXML', 'createXMLFrom', 'delete', 'destroy', 'info', 'isActive', 'isPersistent', 'listVolumes', 'name', 'numOfVolumes', 'refresh', 'setAutostart', 'storageVolLookupByName', 'undefine'] >>> help(libvirt.virStoragePool.createXML) Help on method createXML in module libvirt: createXML(self, xmldesc, flags) unbound libvirt.virStoragePool method Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes from the libvirt.org documentation: http://libvirt.org/html/libvirt-libvirt.html#virStorageVolCreateXML virStorageVolPtrvirStorageVolCreateXML(virStoragePoolPtr pool, const char * xmldesc, unsigned int flags) Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes pool:pointer to storage pool xmldesc:description of volume to create flags:extra flags; not used yet, so callers should always pass 0 Returns:the storage volume, or NULL on error

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[libvirt-users] Destroy VM failed.
by david_zhu 08 May '12

08 May '12

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[libvirt-users] list storage pools and volumes using python api calls
by Syed A. Ali 08 May '12

08 May '12

how do i list storage pools and volumes using the python bindings? basically the python api calls for virsh pool-list and virsh vol-list thanks

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[libvirt-users] libvirt read only connections upgraded to full access connections
by Doug Goldstein 08 May '12

08 May '12

I've gone through the docs and the API and I didn't see a way to do this but I wanted to confirm. My application gives a bunch of info on the state of a VM that's available through a connection created through libvirt.openReadOnly() but at some point the user might want to restart the VM let's say. This requires a full privilege connection, rather than opening a new connection I was hoping to upgrade the existing one to a full privilege connection. Just confirming that's not possible. -- Doug Goldstein

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[libvirt-users] libvirt python api for storage-volumes and storage-pools
by John Wayne 07 May '12

07 May '12

hi, how do i list storage pools and volumes using the python bindings? basically the python api calls for virsh pool-list and virsh vol-list thanks

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[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 07 May '12

07 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 05 May '12

05 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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