[libvirt] How to clone a domain using Java API?
Couldn't find any Java API or even any function in libvirt documentation: http://libvirt.org/html/libvirt-libvirt.html In case there is no API present can someone please point how this can be achieved using existing Java APIs to get the same behavior as virt-clone? Thanks, -Ganesh -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] Alternative to XML Creation and Parsing?
Resending, as the previous one hasn't appeared after waiting for more than a day. My apologies if this is duplicate. Hello, We plan to develop a fancy GUI which would help creating and managing VMs/Domains for RHEL 5.4 KVM. However looking at the schemas provided in docs/schemas/ (Ex: domain.rng) generating the XML file from the inputs taken from the GUI and pass it on to virDomainDefineXML() turns out to be a huge tasks in itself. I was wondering if there is an better way for me to provide my configurations to the library and also to read data from it (instead of creating, parsing XMLs)? If an alternate approach exist, are there any limitations with it? Also the schema given in docs/schemas/ would be generic for all hyper visor. How can I identify the tags applicable only for a particular hyper visor? I found: virConnectDomainXMLFromNative(virConnectPtr conn, const char * nativeFormat, const char * nativeConfig, unsigned int flags) in API reference, which could solve my first problem but couldn't figure out what nativeFormat would be. Any inputs/pointers would be highly appreciated. Regards, Ganesh -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] Alternative to XML Creation and Parsing?
Hello, We plan to develop a fancy GUI which would help creating and managing VMs/Domains for RHEL 5.4 KVM. However looking at the schemas provided in docs/schemas/ (Ex: domain.rng) generating the XML file from the inputs taken from the GUI and pass it on to virDomainDefineXML() turns out to be a huge tasks in itself. I was wondering if there is an better way for me to provide my configurations to the library and also to read data from it (instead of creating, parsing XMLs)? If an alternate approach exist, are there any limitations with it? Also the schema given in docs/schemas/ would be generic for all hyper visor. How can I identify the tags applicable only for a particular hyper visor? I found: virConnectDomainXMLFromNative(virConnectPtr conn, const char * nativeFormat, const char * nativeConfig, unsigned int flags) in API reference, which could solve my first problem but couldn't figure out what nativeFormat would be. Any inputs/pointers would be highly appreciated. Regards, Ganesh -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] hellolibvirt: no hypervisor driver available for xen:///
Thanks Daniel. After installing xen-devel and rebuilding libvirt, the sample program worked. -Ganesh On Wed, Apr 14, 2010 at 2:48 PM, Daniel P. Berrange berra...@redhat.comwrote: On Tue, Apr 13, 2010 at 11:37:01PM +0530, Ganesh Pagade wrote: Hi, I downloaded and built the latest libvirt source code 0.8. I installed the library in a custom directory libvirt-0.8.0-install/ keeping all other configurations default. After this I tried to execute the example hellolibvirt: [hellolibvirt]# ./hellolibvirt xen Attempting to connect to hypervisor libvir: Remote error : unable to connect to '/root/ganeshp/libvirt-0.8.0-install/var/run/libvirt/libvirt-sock', libvirtd may need to be started: Connection refused No connection to hypervisor Parameter error when attempting to get last error My libvirtd was running from /etc/init.d/libvirtd. Still why is it trying to connect to the newly built libvirtd? I stopped the /etc/init.d/libvirtd and started my newly built daemon: [hellolibvirt]# /root/ganeshp/libvirt-0.8.0-install/sbin/libvirtd start 04:47:07.534: warning : qemudStartup:1574 : Unable to create cgroup for driver: No such device or address 04:47:07.540: error : parse_socket:126 : cannot open /sys/devices/system/cpu/cpu1/topology/physical_package_id: No such file or directory 04:47:07.540: warning : qemudCapsInit:1068 : Failed to get host CPU 04:47:07.544: warning : lxcStartup:1835 : Unable to create cgroup for driver: No such device or address After this I tried running hellolibvirt example again: [hellolibvirt]# ./hellolibvirt xen Attempting to connect to hypervisor 04:48:43.166: error : virLibConnError:450 : no hypervisor driver available for xen:/// libvir: error : no hypervisor driver available for xen:/// libvir: error : no hypervisor driver available for xen:/// This means you have built libvirt without Xen support. It should have told you after you ran 'configure' which drivers were enabled. Daniel -- |: Red Hat, Engineering, London-o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org-o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] hellolibvirt: no hypervisor driver available for xen:///
Hi, I downloaded and built the latest libvirt source code 0.8. I installed the library in a custom directory libvirt-0.8.0-install/ keeping all other configurations default. After this I tried to execute the example hellolibvirt: [hellolibvirt]# ./hellolibvirt xen Attempting to connect to hypervisor libvir: Remote error : unable to connect to '/root/ganeshp/libvirt-0.8.0-install/var/run/libvirt/libvirt-sock', libvirtd may need to be started: Connection refused No connection to hypervisor Parameter error when attempting to get last error My libvirtd was running from /etc/init.d/libvirtd. Still why is it trying to connect to the newly built libvirtd? I stopped the /etc/init.d/libvirtd and started my newly built daemon: [hellolibvirt]# /root/ganeshp/libvirt-0.8.0-install/sbin/libvirtd start 04:47:07.534: warning : qemudStartup:1574 : Unable to create cgroup for driver: No such device or address 04:47:07.540: error : parse_socket:126 : cannot open /sys/devices/system/cpu/cpu1/topology/physical_package_id: No such file or directory 04:47:07.540: warning : qemudCapsInit:1068 : Failed to get host CPU 04:47:07.544: warning : lxcStartup:1835 : Unable to create cgroup for driver: No such device or address After this I tried running hellolibvirt example again: [hellolibvirt]# ./hellolibvirt xen Attempting to connect to hypervisor 04:48:43.166: error : virLibConnError:450 : no hypervisor driver available for xen:/// libvir: error : no hypervisor driver available for xen:/// libvir: error : no hypervisor driver available for xen:/// No connection to hypervisor Parameter error when attempting to get last error I do not understand why the program is not able to find the xen driver. I am able to launch VMM GUI and create VMs using xen connection. The system already has xen hypervisor (3.1.0). Even the newly built virsh gives similar errors. Whereas /usr/bin/virsh works perfectly fine. Am I missing some configuration or dependency? Any pointers/suggestion would greatly help. Thanks. Regards, -Ganesh -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] libvirt: C++ or Java?
Hello, I am planning to develop a management application for managing Redhat Xen and Redhat KVM hypervisors. I am evaluating the Java bindings versus the C++ version of libvirt. As part of evaluation, I could not find meaningful answers to the questions below. Hence, I thought that people on this mailing list would be the most appropriate to comment on them. Can you please let me know your views? 1. Are all functions that are available in C API available in Java? 2. Are Java bindings added along with every enhancement to C API? 3. If answer to above question is negative, typically how long does it takes for the addition of Java bindings for the enhancement? 4. Most of libvirt based third party management applications use which of Java bindings or C API? 5. What are your good/bad experiences while using either of C API or Java bindings? 6. What is your concluding personal recommendation? And finally, since libvirt is a Redhat Emerging Technology project, does Redhat or any other third party service providers provide paid assistance, support? Appreciate your time. Thanks. Regards, Ganesh -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
