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[libvirt-users] how to convert from xen .cfg files to libvirt xml?
by Mauro 27 Sep '11

27 Sep '11

I have a .cfg configuration file for a xen virtual machine. I need to convert it in xml format to use with libvirt. So I run virsh domxml-from-native xen-xm backupsrv.cfg but I have an error: error: Unknown failure. How can I investigate about the error?

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[libvirt-users] virsh edit problems
by Robin Lee Powell 26 Sep '11

26 Sep '11

I've got a problem where I can't access my console (well, I can', but I can't type in a password), which I don't think is a libvirt issue but any help or commentary is certainly welcome http://thread.gmane.org/gmane.comp.emulators.kvm.devel/79561 , and I'm trying to debug it by trying out different console/serial options in my .xml file, and I can't change them. What I have now: <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> No matter what I change, whether I use "virsh edit" or edit the files directly, even with libvirt off, as soon as libvirt notices (i.e. when I turn it back on) my changes get blown away and it ends up looking just like the above. Even as simple a thing as changing the port number, or removing the console, or adding a second serial... all gone. Oh, wait, that's not quite true; adding a second serial *does* work. But nothing else I've tried does. What I'm actually trying to do is copy the docs http://libvirt.org/formatdomain.html#elementsConsole more closely and specify my own source paths; I'm worried that the serial and the console are somehow ending up in the same place and maybe that's causing my problem? What I've been trying to do is something like: <serial type='pty'> <source path='/dev/pts/3'/> <target port='0'/> </serial> <console type='pty'> <source path='/dev/pts/4'/> <target port='0'/> </console> And it just won't stick. Maybe that's not even my problem, but it's not showing any errors, and it's annoying me and I'd like to understand why. -Robin

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[libvirt-users] changue bridge name, libvirt refuses to take new name
by Sergio A. Kessler 26 Sep '11

26 Sep '11

hi all, (this events ocurred before my previous mail about the uuid incident) so, I installed a vm host: rhel6 guest: centos6 network: bridge (br0, eth1 as slave) but then, I changed the name of the bridge from br0 to br1 (because br1<->eth1 seems pretty than br0<->eth1) so: - mv /etc/sysconfig/network-scripts/ifcfg-br0 /etc/sysconfig/network-scripts/ifcfg-br1 - edited /etc/sysconfig/network-scripts/ifcfg-br1 change DEVICE=br0 by DEVICE=br1 - edited /etc/sysconfig/network-scripts/ifcfg-eth1 and changed the line BRIDGE=br0 to BRIDGE=br1 - edited /etc/libvirt/qemu/rmdev2.xml and changed the line <source bridge='br0'/> to <source bridge='br1'/> - service network restart <aside note> boom! lost connection to the server I had to go to server location (a few miles) by car because the network restart didn't stop br0 because thera was no script br0 and when br1 started produced a collision </aside note> - service libvirtd restart # brctl show bridge name bridge id STP enabled interfaces br1 8000.e41f13ba6e1a no eth1 virbr0 8000.5254003a3124 yes virbr0-nic # virsh -c qemu:///system start rmdev2 error: Failed to start domain rmdev2 error: Failed to add tap interface to bridge 'br0': No such device there *nothing* 'br0' in /etc in the system (I grepped it), why is looking for br0 instead of br1 ? I ended up undefining rmdev2, installing a new guest called rmdev2 using br1, and that was when I got the error: operation failed: cannot restore domain 'rmdev2' uuid 9e9ea633-9691-f3d6-64da-ae9c8b3e5810 from a file which belongs to domain 'rmdev2' uuid 4f425d14-335b-0adc-11af-06e503c6b54d yes, I was ready to fire the house and leaving for better places... thanks, /sergio

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[libvirt-users] new guest with same name as undefined one
by Sergio A. Kessler 26 Sep '11

26 Sep '11

hi, - host: rhel6 - I created a guest rmdev2 (centos6) - undefined it - again created rmdev2 guest (centos6) now I get: [root@rmdev1 var]# virsh -c qemu:///system Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list --all Id Name State ---------------------------------- - rmdev2 shut off virsh # start rmdev2 error: Failed to start domain rmdev2 error: operation failed: cannot restore domain 'rmdev2' uuid 9e9ea633-9691-f3d6-64da-ae9c8b3e5810 from a file which belongs to domain 'rmdev2' uuid 4f425d14-335b-0adc-11af-06e503c6b54d why ? it seems the ghost of the old guest is causing problems... all the files used by the first guest are deleted... thanks. /sergio

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[libvirt-users] ANNOUNCE: oz 0.7.0 release
by Chris Lalancette 23 Sep '11

23 Sep '11

All, I'm pleased to announce release 0.7.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.7.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.6.0 and 0.7.0 are: - Ability to use the "direct initrd injection" method to install Fedora/RHEL guests. This is an internal implementation detail, but can significantly speed up installs for Fedora or RHEL guests. (thanks for the tip from Kashyap Chamarthy) - Support for Fedora-16 (thanks to Steve Dake for help in making this work) - Use the serial port to announce guest boot, rather than a network port. This makes it so we no longer have to manipulate iptables, and gets us one step closer to having Oz run as non-root - (for developers) Re-written unittests in python for speedier execution - (for developers) Additional methods in the TDL class to merge in external package lists (thanks to Ian McLeod) A tarball of this release is available, as well as packages for Fedora-14, Fedora-15, and RHEL-6. Note that to install the RHEL-6 packages, you must be running RHEL-6.1 or later. 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 (clalance(a)redhat.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] virDomainDefineXml Issue
by Kiran Javaid 23 Sep '11

23 Sep '11

Hello Everyone, I am facing a problem in defining the xml for domain creation using libvirt. I am using Xen hypervisor. domPtr = lib.virDomainDefineXML(conPtr, domainXML); I get the following error: "libvir: Xen Daemon error : XML error: failed to parse domain description" Any suggestions are welcome. Regards.

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[libvirt-users] The Format Of URI when Migrating
by huachao yao 23 Sep '11

23 Sep '11

Hi, when I try to use such API: virDomainPtr <http://www.libvirt.org/html/libvirt-libvirt.html#virDomainPtr> virDomainMigrate (virDomainPtr <http://www.libvirt.org/html/libvirt-libvirt.html#virDomainPtr> domain, virConnectPtr <http://www.libvirt.org/html/libvirt-libvirt.html#virConnectPtr> dconn, unsigned long flags, const char * dname, const char * uri, unsigned long bandwidth) to achieve the domain to the remote host. I set the "const char * uri" as "qemu+ssh://root@116.56.142.199/system". But the Error "libvir: QEMU error : invalid argument in only tcp URIs are supported for KVM/QEMU migrations" happened. I want to know when i want the migrate ,how can i set the URI ? offer a example is better. :-)

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[libvirt-users] Hot cloning & P2V
by smain kahlouch 22 Sep '11

22 Sep '11

Hi all, I guess my question is stupid and has been asked a thousand times but i was wondering if it's possible to do the following things: - Cloning of a running virtual machine (hot copy) - Migrate a physical server to a virtual one. I googled a bit and am not able to find the answers. Thanks. Regards, Sam

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[libvirt-users] random "monitor socket did not show up"
by Gian Uberto Lauri 22 Sep '11

22 Sep '11

Hello gentlemen! I just experienced this weird thing: I have 2 machines (one is a Dell Pe1950 with 2 Xeon 5130, the other is a Fujitsu RX200S6 with 2 Xeon E5645), both run CentoOS 5.6, the DELL has the 2.6.18-238.9.1.el5 while the Fujitsu runs the 2.6.18-238.12.1.el5 kernel. But when I try to do a virsh create with this script <domain type='kvm'> <name>one-292</name> <memory>1894400</memory> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/one/292/images/disk.0'/> <target dev='hda'/> <driver name='qemu' type='qcow2'/> </disk> <disk type='file' device='cdrom'> <source file='/var/lib/one/292/images/disk.1'/> <target dev='hdb'/> <readonly/> <driver name='qemu' type='raw'/> </disk> <interface type='bridge'> <source bridge='br0:0'/> <mac address='20:00:ac:14:fe:06'/> </interface> <graphics type='vnc' listen='0.0.0.0' port='6192'/> </devices> </domain> it works perfectly on the Dell. On the Fujitsu it failed repeatedly and then worked. Any explainations and some hint on getting it work always ? -- ing. Gian Uberto Lauri Ricercatore / Reasearcher Laboratorio Ricerca e Sviluppo / Research & Development Lab. Area Calcolo Distribuito / Distributed Computation Area GianUberto.Lauri(a)eng.it Engineering Ingegneria Informatica spa Corso Stati Uniti 23/C, 35127 Padova (PD) Tel. +39-049.8283.571 | main(){printf(&unix["\021%six\012\0"], Fax +39-049.8283.569 | (unix)["have"]+"fun"-0x60);} Skype: gian.uberto.lauri | David Korn, AT&T Bell Labs http://www.eng.it | ioccc best One Liner, 1987

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[libvirt-users] Problem with allocation of big files
by Nikita A Menkovich 20 Sep '11

20 Sep '11

Hello, I found a strange problem with allocationg big files on drive. For example in guestfish I allocate large disk image for example: $ guestfish ><fs> allocate test.img 20G When an image allocating, there is a big slowdown of guest OSes, launched on host machine, and on different drives. For Linux guests with virtio drivers, there is no so big performance penalty, but for FreeBSD guests with ide it seems like the OS locked. Manipulating with ionice and niceness do not affect at all. Manipulating with cfq, deadline schedulers also do not have any results. OS Debian Squeeze libvirtd (libvirt) 0.9.2 QEMU emulator version 0.14.0 (Debian 0.14.0+dfsg-5.1), Copyright (c) 2003-2008 Fabrice Bellard guestfish 1.10.3 with some local patches, backported from main tree Does anyone have ideas how to fix it? -- Nikita A Menkovich http://libc6.org/ JID: menkovich(a)gmail.com

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