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[libvirt-users] libvir: error : cannot getpwuid_r(107): Success
by vipul borikar 31 Jan '12

31 Jan '12

I am on RHEL 6.1 running KVM. I am getting following error when i start a Ubuntu 11.10 Guest I am attaching my xml file . # virsh -c qemu:///system create Ubuntu-110.10.xml error: Failed to create domain from Ubuntu-110.10.xml error: internal error Process exited while reading console log output: 16:19:53.991: 2418: info : libvirt version: 0.8.7, package: 18.el6 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2011-04-18-10:28:30, x86-008.build.bos.redhat.com) 16:19:53.991: 2418: error : virSetUIDGID:2905 : cannot getpwuid_r(107): Success libvir: error : cannot getpwuid_r(107): Success Where should i looks for more info??? -- Thanks Vipul Borikar "Our task must be to free ourselves...by widening our circle of compassion to embrace all living creatures and the whole of nature and its beauty."

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[libvirt-users] How to change libvirt / cgroup interaction?
by Samuel Hassine 26 Jan '12

26 Jan '12

Hi there, Do you know if there is a way to modify how libvirt interacts with the cgroup? Because, I successfully add the /dev/net/tun support in my LXC container by doing: echo c 10:200 rwm >> /cgroup/libvirt/lxc/instance-00000005/devices.allow But when I restart the instance/LXC container, this option has gone. How can I make this persistant? Is there a configuration file? Thanks for your answers. Best regards. Sam

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[libvirt-users] Preventing 'virsh start' while doing backup?
by Ken Coar 26 Jan '12

26 Jan '12

Is there any way to interface with virsh to keep it from executing a startup operation? Sort of like the /etc/nologin (man page nologin(5)) mechanism? Basically, I want to be able to shut down a VM in order to copy its disk images, and be reasonably assured that it won't be started before I'm finished. Is there any sort of hook or interlock file or other mechanism to accomplish this? Thanks! -- #ken B-)} Ken Coar, Sanagendamgagwedweinini IT Engineering Tower, Red Hat/RDU "Millennium hand and shrimp!"

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[libvirt-users] how to change existing domain xml?
by p-man314＠mail.ru 25 Jan '12

25 Jan '12

Hi. I'm trying to change network settings for a domain via libvirt (the driver is xenapi) with no success. According to its sources, 'virsh edit' uses virDomainGetXMLDesc(), allows to edit the received xml and then use virDomainDefineXML(). In case of xenapi driver it leads to a new vm creation (with the same name and edited settings). Looking through the list of API functions I failed to find a function like virDomainUpdateXML() that would change configuration of existing domain. Could you please suggest a way to do it? Thanks in advance.

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[libvirt-users] ANNOUNCE: oz 0.8.0 release
by Chris Lalancette 25 Jan '12

25 Jan '12

All, I'm pleased to announce release 0.8.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.8.0 is a (long overdue) bugfix and feature release for Oz. Some of the highlights between Oz 0.7.0 and 0.8.0 are: - Optional virtualenv make target - Conversion of unittests to py.test - Replace mkisofs with genisoimage - Debian package - Ability to change the root password for Debian installs - Add unittests for ozutil - Add some unittests for the Guest object - SSH tunnel (with SSL vhost) support for local repositories (mostly useful for imagefactory) - Add a new manpage for oz-examples - Make the output filename configurable with a command-line option to oz-install - Monitor both network and disk activity when looking for guest activity - Support for installing Ubuntu 11.10 - Support for SSL certificates for repositories - Support for an optional version in the TDL - Support for installling Mandrake 9.1, 9.2, 10.0, 10.1, 10.2 - Support for installing Mandriva 2006.0, 2007.0, 2008.0 - Support for Ubuntu customization - Support for installing RHEL 6.2 A tarball of this release is available, as well as packages for Fedora-16. Instructions on how to get and use Oz are available at http://aeolusproject.org/oz.html If you have any questions or comments about Oz, please feel free to contact aeolus-devel(a)lists.fedorahosted.org or me (clalancette(a)gmail.com) directly. Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. -- Chris Lalancette

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[libvirt-users] [Problem] C# virDomainShutdown
by Danny Fonk 24 Jan '12

24 Jan '12

Hey there, im using libvirt since 2 weeks now and there are still some issues im confronted with. I use libvirt in C# and I'm running a 32-bit machine on Windows 7. Actually my worst problem is, is that I'm not able to Shutdown on machine no matter which command I'm using. virDomainShutdown isn't working nor virDomainDestroy. Basically I use the virConnectOpenAuth example to make a test on this. You'll find a code-excerpt in the attachment. Everything else is working. Like Domain.GetName etc. - i just can't figure out the failure and I wanted to ask if the mistake is in the API since it's not tested on a 32-bit Windows. Already thanks for the support. Best regards, D. Fonk -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

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[libvirt-users] Question about libvirt / LXC
by Samuel Hassine 24 Jan '12

24 Jan '12

Hi there, I have a small simple question about libvirt and LXC containers. I know how to activate /dev/net/tun in an LXC container: #tun lxc.cgroup.devices.allow = c 10:200 rwm in the LXC config file. But, how to do that in a libvirt XML file? I just need to activate the /dev/net/tun device in an LXC container using libvirt. Thanks for your answers! Best regards. Sam

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[libvirt-users] oVirt setup issues
by Christian Parpart 23 Jan '12

23 Jan '12

Hi all, as suggested in a prior mail, I was now trying out oVirt - however, on a non-Redhat/Debian system - and ran into huge issues primary due to the lag of information / documenation. So here my assumptions: * oVirt is a web application based on JBoss application server. * VDSM is an agent to run on every hypervisor (or also VM?) * nothing else needed? (despite jboss, java-jdk-1.6, python-2.7, maven-2.2) I tried following the install-from-source guides for oVirt and failed at a compilation error. # cd $OVIRT_ENGINE_SRCDIR # make [.....] [INFO] Compiling 186 source files to /opt/ovirt/src/ovirt-engine/backend/manager/modules/dal/target/classes [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Compilation failure /opt/ovirt/src/ovirt-engine/backend/manager/modules/dal/src/main/java/org/ovirt/engine/core/dal/dbbroker/PGHack.java:[9,7] error: PGHack is not abstract and does not override abstract method getParentLogger() in CommonDataSource [...] There are no remote branches nor tags that looked like "stable" that I could test on, too. So finally (the not favoured version), I tried putting a Fedora 16 netinstall into a KVM on my hypervisor-test-node and installed everything in there, again, following some guide from the upstream site. Since it did not compile anything, the install worked well, but I could not add my hypervisor node as a host, in fact, it complained about some tools not being able to be installed. What tools? VDSM? how am I supposed to "cleanly" install it if not as promoted on the install guide? :( In the end, I am having nothing working, feeling a little bit sad about the possibly wasted time, so I hope you guys can give me a hint on how to deal with VDSM (if that's what I am missing here) and how to deal with the compile error when installing from source. Best regards, Christian Parpart.

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[libvirt-users] gPXE fails automatically, succeeds with manual autoboot
by Paul Lussier 23 Jan '12

23 Jan '12

Hi Folks, I'm trying to auto-create a VM using a kickstart server and gPXE with my VMs. The underlying physical host is CentOS 6.0 running libvirt-0.8.1-27, and libvirt-python 0.8.1-27, virt-manager 0.8.4-8. The underlying network config on the physical host is: # ip -o -4 addr show 1: lo inet 127.0.0.1/8 scope host lo 6: vnet0 inet 10.8.31.61/23 brd 10.8.31.255 scope global vnet0 7: vnet1 inet 10.0.4.249/24 brd 10.0.4.255 scope global vnet1 8: virbr0 inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 I'm attempting to create the new VM with the following command-line: # /usr/bin/virt-install -n test -r 2048 --vcpus=2 --disk path=/var/lib/libvirt/images/test.img,size=25 --pxe --os-type=linux --os-variant=rhel6 --network bridge=vnet0,mac=52:54:00:07:51:1e --autostart So, I'm trying to create the VM with one NIC, bound to the vnet0 interface on the physical host. The physical host is both the PXE/DHCP server (using cobbler) and the kickstart server. When I run the above virt-install command, while simultaneously running 'tcpdump -i vnet0 -n port 67 or port 68' on the physical host, the VM powers on, boots up, and attempts to PXE boot. However, I never see any traffic on the physical host's vnet0 interface, nor does the DHCP server log any requests. If I boot the VM, then hit Ctrl-B to drop into gPXE's prompt and type autoboot, the first invocation fails, but the second one succeeds. Has anyone seen this kind of behavior ? Is this indicative of a configuration issue on the physical host? An underlying network problem ? Or am I missing an option on my command-line ? I'm a little stumped here, and hoping someone can point me in the right direction. I'm more than happy to RTFM if someone can tell me which M to F'ing R :) -- Thanks Paul

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[libvirt-users] libvirt 0.9.9: could not open /dev/net/tun: Operation not permitted
by Fischer, Anna 23 Jan '12

23 Jan '12

Hi, I'm running the latest libvirt 0.9.9. I'm trying to start a VIF of type "Ethernet". I know there are problems with that because you need to be root in order to control the tun/tap driver. I changed my qemu.conf file to user = "root" group = "root" clear_emulator_capabilities = 0 However, I still get an error when trying to start my VM: [root]# virsh start vm-0-3 error: Failed to start domain vm-0-3 error: internal error process exited while connecting to monitor: qemu-system-x86_64: -net tap,ifname=vif-0-3,script=/etc/libvirt/qemu/vif-vnet-up,vlan=0,name=hostnet0: could not open /dev/net/tun: Operation not permitted qemu-system-x86_64: -net tap,ifname=vif-0-3,script=/etc/libvirt/qemu/vif-vnet-up,vlan=0,name=hostnet0: Device 'tap' could not be initialized I run the latest qemu-kvm. The permissions on the tun device are set to default settings and my scripts are executable by anyone: [root ~]# ll /dev/net/tun crw-rw---- 1 root root 10, 200 Jan 20 15:39 /dev/net/tun [root ~]# ll /etc/libvirt/qemu/vif-vnet-* -rwxrwxrwx 1 root root 150 Jan 17 15:52 /etc/libvirt/qemu/vif-vnet-down -rwxrwxrwx 1 root root 137 Jan 19 17:51 /etc/libvirt/qemu/vif-vnet-up Any idea what I'm doing wrong here? I have actually also compiled libvirt with --without capng, so it should not drop capabilities anyway. Why does it not run as root? Thanks, Anna

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