- Users - libvirt List Archives

[libvirt-users] vm bridge network is down after reboot on guest machine ..
by Nitin kumar 07 Mar '12

07 Mar '12

Hi all , We have one virtual guest when reboot the virtual guest network port not comming up automatically ... any seeting to enable it ... -- With Best Regards, Nitin Kumar Sr. System Engineer-Unix (CSC India Pvt. Ltd, Noida ) +91-9999706444

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[libvirt-users] Booting virtual machines automatically
by Daniel Gonzalez 07 Mar '12

07 Mar '12

Hello, I am managing several virtual machines (a predefined set) with virsh, and I would like to make sure that all VMs are booted when the host reboots. What is the recommended approach for this? Thanks, Daniel Gonzalez

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[libvirt-users] PCI-X card controlled by VM
by Daniel Gonzalez 07 Mar '12

07 Mar '12

Hi all, I have a PCI-X card which I would like to assign to one of my VM guests. Is there any way, using libvirt, of completely bypassing the host system, and routing all PCI-X interaction (drivers, interrupts, general ownership) to one of the VMs? Thanks, Daniel Gonzalez

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[libvirt-users] Qemu restore error.
by Sharad Mishra 06 Mar '12

06 Mar '12

Eric, I have a RHEL6.0 machine running libvirt 0.8.7-18. I am running into issue mentioned in one of the previous posting. https://www.redhat.com/archives/libvirt-users/2011-December/msg00059.html # virsh start <domain> error: Failed to start domain <domain> error: operation failed: failed to read qemu header # od -N 128 -tx1z /path/to/domain.save 0000000 The workaroud to run --force-boot does not work on 0.8. Is a fix available for this issue? -Sharad Mishra

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[libvirt-users] qemu - could not load kernel and dynamic ownership setting
by Shantanu Pavgi 06 Mar '12

06 Mar '12

Hi, I am getting following 'qemu: could not load kernel' error while trying to create a new VM using virt-install or virt-manager. The software versions are as follows: CentOS 6.2, Libvirt 0.9.4, qemu-kvm 2:0.12.1.2-2.209.el6_2.1. The qemu.conf has disabled dynamic_ownership setting. The VM instantiation has worked fine before when dynamic_ownership was enabled (default). So is this error related to dynamic ownership being disabled? I appreciate any help on how to debug this error further. Also, is there any documentation on why/when dynamic_ownership setting should be used? We have enabled it to figure this out through some test installs but right now unable to move further with the install step itself. {{{ virt-install --connect qemu:///system \ -n $guestname \ -r 512 \ --vcpus=1 \ --os-type=linux \ --os-variant=rhel6 \ --accelerate \ --graphics vnc,keymap=en-us \ -v \ -w bridge:br1 \ --disk path=$datastore/$guestname.img,size=40 \ -l $repo \ -x "ks=$ksurl/$ksfile ksdevice=eth0 ip=$guestip netmask=$netmask nameserver=$nameserver gateway=$gw" }}} {{{ Starting install... Retrieving file .treeinfo... | 798 B 00:00 ... Retrieving file vmlinuz... | 7.5 MB 00:00 ... Retrieving file initrd.img... | 59 MB 00:01 ... Allocating 'virtinst-vmlinuz.l4mEAd' | 3.8 MB 00:00 Transferring virtinst-vmlinuz.l4mEAd | 3.8 MB 00:00 Allocating 'virtinst-initrd.img.IvGhFr' | 29 MB 00:00 Transferring virtinst-initrd.img.IvGhFr | 29 MB 00:05 Creating storage file generic-server.img | 40 GB 00:00 ERROR internal error process exited while connecting to monitor: char device redirected to /dev/pts/1 qemu: could not load kernel '/var/lib/libvirt/boot/virtinst-vmlinuz.l4mEAd': Permission denied Domain installation does not appear to have been successful. }}} -- Thanks, Shantanu

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[libvirt-users] About suspend VM
by Александр Семенов 06 Mar '12

06 Mar '12

Hello. I want to disable function suspend and saving in libvirt. How can i do it? -- ------------ С уважением, Семенов А.С. тел. 8-9269150661

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Re: [libvirt-users] Unable to connect qemu:///system on CentOS 6.2 X86_64
by Michał Kulling | IQ.pl 06 Mar '12

06 Mar '12

Try one more time and paste /var/log/message (tail -100 /var/log/message) and /var/log/secure (tail -40 /var/log/secure) to pastebin.com and send link. On Mon, 5 Mar 2012 22:16:15 +0800, suyi wang <wangsuyi640(a)gmail.com> wrote: > I just tried it , but... :( > > 2012/3/5 Michał Kulling | IQ.pl > On Mon, 5 Mar 2012 20:50:29 +0800, suyi wang > wrote: > >> Dear all: > > I ust installed Fedora16Fedora16 X86_64 on my new machine, > and > > then I ran the commands as follows(ran as root): > > > > yum install qemu-kvm > > yum install qemu > > yum install libvirt > > yum install virt-manager > > > > then I started the libvirtd as follow: > > /etc/init.d/lbvirtd start > > > > So , it ran well. > > > > However, after a few days , when I ran the command "virt-manager" > , > > it showed as in the attachment. > > > > it seemed that ti cannot connect the hipervisor. > > > > Then I did a little test: > > I ran the conmand "virsh list" , but it didnot work,either. > > > > Then I used Python as follows: > > import libvirt > > cc = libvirt.open(r'qemu:///system' > > ) > > > > but it didnot work,either. > > > > All the test above are under root . I hope that someone can give > me > > some suggestiion. Thanks to all! > > Try: > > # service qemu-kvm restart > # service libvirtd restart > > :-) > > -- > > Michał Kulling > http://iq.pl/ [3] > > > > Links: > ------ > [1] mailto:mkulling@iq.pl > [2] mailto:wangsuyi640@gmail.com > [3] http://iq.pl/ -- Michał Kulling http://iq.pl/

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[libvirt-users] Unable to connect qemu:///system on CentOS 6.2 X86_64
by suyi wang 05 Mar '12

05 Mar '12

Dear all: I ust installed Fedora16Fedora16 X86_64 on my new machine, and then I ran the commands as follows(ran as root): yum install qemu-kvm yum install qemu yum install libvirt yum install virt-manager then I started the libvirtd as follow: /etc/init.d/lbvirtd start So , it ran well. However, after a few days , when I ran the command "virt-manager" , it showed as in the attachment. it seemed that ti cannot connect the hipervisor. Then I did a little test: I ran the conmand "virsh list" , but it didnot work,either. Then I used Python as follows: import libvirt cc = libvirt.open(r'qemu:///system' ) but it didnot work,either. All the test above are under root . I hope that someone can give me some suggestiion. Thanks to all!

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[libvirt-users] Solution for Address family not supported by protocol
by 4k3nd0 05 Mar '12

05 Mar '12

I just upgrade to the last version of the libvirt on my Gentoo System. (From 0.9.6 to 0.9.10-r3) But i have a problem with starting my NAT: Error starting network 'NAT': Cannot open network interface control socket: Address family not supported by protocol Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 66, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/network.py", line 82, in start self.net.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1863, in create if ret == -1: raise libvirtError ('virNetworkCreate() failed', net=self) libvirtError: Cannot open network interface control socket: Address family not supported by protocol Anyone have an idea how to fix this? I try also to add a new adapter by hand, but know seems to work her.... so far 4k3nd0

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[libvirt-users] Resource overcommit
by Jatin Kumar 05 Mar '12

05 Mar '12

How do we configure cpu and memory over commitment in KVM ? -- Jatin

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[libvirt-users] [LXC] Attempt to start X in guest makes host X die
by Robin Green 04 Mar '12

04 Mar '12

I have attempted to start X in a rawhide LXC guest on a Fedora 16 host, using echo a > /sys/fs/cgroup/devices/libvirt/lxc/Rawhide/devices.allow to allow me to create all the necessary devices in /dev in the guest (dangerous, I know, but I only ran that command after the guest systemd finished booting). This is with the nouveau open source driver. I ran X using /usr/bin/startx -- :7 vt7 Immediately the host X server dies, even though it's on a different virtual terminal (VT1). It seems to be something to do with DRM. The /var/log/Xorg.0.log in the host says something about drmSetMaster failing. What's strange is that according to the guest Xorg.7.log, DRM opening fails there too: "drmOpenDevice: open result is -1, (No such device)". If there is no such device (even though I created it), how can the guest be affecting the host? I think it might possibly be related to https://bugzilla.redhat.com/show_bug.cgi?id=680677 Maybe the guest X immediately fails to start but for some reason does not release the DRM master (at all, or quickly enough), and the host X tries to regain the DRM master but fails and dies. I looked at some other drivers to see if any other X drivers have better handling of the latter condition, but I couldn't find any which do a retry in this case. I would report a bug, but I'm not sure which Fedora component to report this against.

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[libvirt-users] Rebélate by self-management, first project of free software by which we bet all / Rebélate por la autogestión, primer proyecto de software libre por el que apostamos todas
by Orquidea Salt mas 03 Mar '12

03 Mar '12

Inglés : Many already we have contributed to the first project of free software dedicated to self-management in this campaign of collective financing, it collaborates and it spreads!/ Beginning campaign collective financing http://www.goteo.org/project/rebelaos-publicacion-por-la-autogestion?lang=en Login to enter with user of social networks and for would register in Goteo : http://www.goteo.org/user/login?lang=en Rebelaos! Publication by self-management A massive publication that floods the public transport, the work centers, the parks, the consumption centers, by means of distribution of 500,000 gratuitous units, acting simultaneously in all sides and nowhere. We announce the main tool of a vestibule Web for the management of self-sustaining resources by means of Drupal, in addition in the publication there will be an article dedicated to free software, hardware, It is being prepared in inglès, the machinery You can see more details in the index of the publication https://n-1.cc/pg/file/read/1151902/indexresumen-de-los-contenidos-pdf . A computer system that allows us to share resources in all the scopes of our life so that we do not have to generate means different for each subject nor for each territory. A point of contact digitalis to generate projects of life outside Capitalism and to margin of the State. A tool to spread and to impel the social transformation through the resources that will set out in their contents around self-management, the autoorganización, the disobedience and the collective action. In which the capitalist system goes to the collapse, in a while immersed in a deep systemic crisis (ecological, political and economic, but mainly of values), where individual and collective of people they are being lacking of his fundamental rights, is necessary to develop a horizontal collective process where all the human beings we pruned to interact in equality of conditions and freedom. To interact means to relate to us (as much human as economically), to communicate to us, to cover our basic needs, to generate and to protect communal properties, to know and to provide collective solutions us problematic that our lives interfere. We want abrir a breach within normality in the monotonous life state-capitalist, a day anyone, that finally will not be any day. By means of this publication we try: - To drive a horizontal collective process where all and all we pruned to interact in equality of conditions and freedom. - To create communications network between the people it jeopardize with the change and arranged to act. - To find collective solutions to problematic that our lives interfere - To facilitate the access to resources that make possible self-management. - To participate in the construction of networks of mutual support, generated horizontals, asamblearias and from the base. - To publish all this information in an attractive format stops to facilitate the access to all the society. There are 15 days remaining for the upcoming March 15, the day that will come Rebelaos!, Magazine for the selfmanagement Today, we issue the cover of Rebelaos! (Castilian version) that can be displayed on the following link: https://n-1.cc/pg/file/read/1200503/portada-15-de-marzo-rebelaos The contents of the store owners to us by 15 March. Do you? Do you keep on 15 March? In addition, we have over 200 distribution nodes, distributed throughout the Spanish state. Check the map: https://afinidadrebelde.crowdmap.com/ On the other hand, the funding campaign continues to move and still have 12 days to collect the remaining 6,000 euros. We can all make a bit for all the grains of sand become a great beach on March 15. You can access the co-financing campaign: http://www.goteo.org/project/rebelaos-publicacion-por-la-autogestion Rebel Affinity group www.rebelaos.net ------------------------------------------------------------------------------- Castellano: Muchos ya hemos aportado al primer proyecto de software libre dedicado a la la financiación colectiva, colabora y diffunde !!!!! Inicio campaña financiación colectiva goteo.org www.goteo.org/project/rebelaos-publicacion-por-la-autogestion Link para registrarse en Goteo y acceder a redes sociales para colaborar en la difusín http://www.goteo.org/user/login ¡Rebelaos! Publicación por la autogestión Una publicación masiva que inunde el transporte público, los centros de trabajo, los parques, los centros de consumo, mediante la distribución de 500.000 ejemplares gratuitos, actuando simultáneamente en todos lados y en ninguna parte. Anunciamos la herramienta principal de un portal web para la gestión de recursos autogestionados mediante Drupal, además en la publicación habrá un artículo dedicado al software libre, el hardware, la maquinaria... Puedes ver más detalles en el índice de la publicación https://n-1.cc/pg/file/read/1151902/indexresumen-de-los-contenidos-pdf Un sistema infórmatico que nos permita compartir recursos en todos los ámbitos de nuestra vida de forma que no tengamos que generar un medio distinto para cada tema ni para cada territorio. Un punto de encuentro digital para generar proyectos de vida fuera del capitalismo y al margen del Estado. Una herramienta para difundir e impulsar la transformación social a través de los recursos que se propondrán en sus contenidos en torno a la autogestión, la autoorganización, la desobediencia y la acción colectiva. En un momento en que el sistema capitalista se dirige al colapso, inmerso en una profunda crisis sistémica (ecológica, política y económica, pero principalmente de valores), donde individuos y colectivos de personas están siendo desprovistos de sus derechos fundamentales, es necesario desarrollar un proceso colectivo horizontal donde todos los seres humanos podamos interactuar en igualdad de condiciones y en libertad. Interactuar significa relacionarnos (tanto humana como económicamente), comunicarnos, cubrir nuestras necesidades básicas, generar y proteger bienes comunes, conocernos y dar soluciones colectivas a problemáticas que interfieren nuestras vidas. Queremos abrir una brecha dentro de la normalidad en la monótona vida estatal-capitalista, un día cualquiera, que finalmente no será cualquier día. Mediante esta publicación pretendemos: - Impulsar un proceso colectivo horizontal donde todos y todas podamos interactuar en igualdad de condiciones y en libertad. - Crear red de comunicaciones entre las personas comprometidas con el cambio y dispuestas a actuar. - Encontrar soluciones colectivas a problemáticas que interfieren nuestras vidas. - Facilitar el acceso a recursos que posibiliten la autogestión. - Participar en la construcción de redes de apoyo mutuo, horizontales, asamblearias y generadas desde la base. - Publicar toda esta información en un formato atractivo para facilitar el acceso a toda la sociedad. Son 15 los días que restan para el próximo 15 de marzo, día en el que verá la luz ¡Rebelaos!, publicación por la autogestión. Hoy, hacemos pública la portada de ¡Rebelaos! (versión en castellano) que podéis visualizar en el siguiente enlace: https://n-1.cc/pg/file/read/1200503/portada-15-de-marzo-rebelaos El contenido de los titulares nos los guardamos para el 15 de marzo. ¿Y tú? ¿Te guardas el 15 de marzo? Además, ya hemos superado los 200 nodos de distribución, repartidos por todo el estado español. Ver el mapa: https://afinidadrebelde.crowdmap.com/ Por otro lado, la campaña de financiación continúa avanzando y todavía quedan 12 días para reunir los 6.000 euros que restan. Todas podemos aportar un poco para que todos los granitos de arena se conviertan en una gran playa el 15 de marzo. Podéis acceder a la campaña de cofinanciación en: http://www.goteo.org/project/rebelaos-publicacion-por-la-autogestion Colectivo Afinidad Rebelde www.rebelaos.net

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[libvirt-users] vhost-net support in ethernet domian
by Tomasz Paszkowski 03 Mar '12

03 Mar '12

Hi, I'am just wondering why there's no support for vhost-net (qemu) in an ethernet domain (<interface type='ethernet'>) ? below code from qemu_command.c: if (actualType == VIR_DOMAIN_NET_TYPE_NETWORK || actualType == VIR_DOMAIN_NET_TYPE_BRIDGE || actualType == VIR_DOMAIN_NET_TYPE_DIRECT) { /* Attempt to use vhost-net mode for these types of network device */ -- Tomasz Paszkowski SS7, Asterisk, SAN, Datacenter, Cloud Computing +48500166299

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[libvirt-users] libvirt-manager , details / console ...
by Marko Weber 02 Mar '12

02 Mar '12

Hi all, we have an easy question for you maybe. when we start the virt-manager, and doubleclick an listed virtual machine, we always bei transported to CONSOLE page. Thats very annoying for us. Is there a possibility to set an option, that on doubleclick you are getting the CONSOLE TAB. in 95% we need Console and not Details. thanks for any costructive hints. marko , from cloudy rainy germany

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[libvirt-users] Migration of a vm consuming high cpu
by Jatin Kumar 02 Mar '12

02 Mar '12

Hello, Today i tried to migrate a vm which was consuming 4 cpus and some 8GB of ram. The cpu utilization was close to 100%. First of all migration took a lot of time and ultimately it failed with and "unknown error" message. Till this time vm was in good state. Then i tried to suspend it and gave error message like "unable to free cpu. cannot suspend". Finally after many attempts it got suspended. Do we have any solution to this. -- Jatin

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[libvirt-users] Problems running virtual machines after an upgrade
by Bhasker C V 01 Mar '12

01 Mar '12

Hi all, I upgraded qemu-kvm and libvirt to the new versions qemu-kvm at : 1.0 libvirt at : git version 0.9.10 I lost the original machines but the xml files were are all present (it is not showing up in virsh list --all) But when I import an xml I get an error: Attached is some information which might be helpful Can someone help please ? If this is a compatibility issue please can someone tell me which is the latest version of qemu-kvm and libvirt combination which will work ? I cannot use qemu plain since it does not yet support boot from scsi thanks ----------------------------------------------- $ sudo virsh list --all Id Name State ---------------------------------------------------- $ lsmod | grep kvm kvm_intel 112920 0 kvm 280656 1 kvm_intel $ /usr/local/sbin/libvirtd --version /usr/local/sbin/libvirtd (libvirt) 0.9.10 $ ./qemu-system-x86_64 --version QEMU emulator version 1.0-bcv (qemu-kvm-1.0), Copyright (c) 2003-2008 Fabrice Bellard $ sudo virsh define ./debian.xml error: Failed to define domain from ./debian.xml error: unknown OS type hvm $ cat debian.xml <domain type='kvm'> <name>debian</name> <uuid>0aab8869-ff87-14ce-a00b-944cdca7acf7</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu cpuset='6-7'>2</vcpu> <cputune> <vcpupin vcpu='0' cpuset='6'/> <vcpupin vcpu='1' cpuset='7'/> </cputune> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu match='exact'> <model>core2duo</model> <vendor>Intel</vendor> <topology sockets='1' cores='2' threads='1'/> <feature policy='disable' name='lahf_lm'/> </cpu> <clock offset='localtime'> <timer name='hpet' tickpolicy='catchup'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/VIRT/disks/DEBIAN'/> <target dev='sda' bus='scsi'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='scsi' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:71:62:f3'/> <source bridge='virt'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-gb'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> -- Bhasker C V

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[libvirt-users] Virtualizing a an old SuSE system
by Dale Amon 29 Feb '12

29 Feb '12

I'm in the midst of an attempt to convert an old and rather large SuSE server (5 disks) into a virsh loadable VM. Has anyone else dealt with the issues of systems of this sort? I'm at the moment trying to hand construct a machine xml file for it. I managed to create one which would load but not start. I'd appreciate some pointers and can supply whatever info you'd like about what I am trying to do and what the dd'd image of the system disk and other disks are like. Not that they do have LVM's, although the boot should be off a base partition that is not in the LVM.

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[libvirt-users] Fwd: Unable to connect qemu:///system on Fedora16 X86_64
by suyi wang 29 Feb '12

29 Feb '12

---------- 已转发邮件 ---------- 发件人： suyi wang <wangsuyi640(a)gmail.com> 日期： 2012年2月29日上午10:57 主题： Re: [libvirt-users] Unable to connect qemu:///system on Fedora16 X86_64 收件人： Eric Blake <eblake(a)redhat.com> So, thanks a lot . Eric. I attached the figure，which showed when I ran the command "virt-manager". I also tested the commad as follows, sa you can see my output. [root@localhost ~]# virt-manager --debug 2012-02-29 10:56:13,555 (cli:71): virt-manager startup 2012-02-29 10:56:13,555 (virt-manager:292): Launched as: /usr/share/virt-manager/virt-manager.py --debug 2012-02-29 10:56:13,555 (virt-manager:293): GTK version: (2, 24, 7) 2012-02-29 10:56:13,555 (virt-manager:294): virtManager import: <module 'virtManager' from '/usr/share/virt-manager/virtManager/__init__.pyc'> 2012-02-29 10:56:13,671 (engine:555): No inspection thread because libguestfs is too old, not available, or libvirt is not thread safe. 2012-02-29 10:56:13,674 (engine:346): About to connect to uris ['qemu:///system'] 2012-02-29 10:56:13,720 (engine:471): window counter incremented to 1 2012-02-29 10:56:13,726 (connection:954): Scheduling background open thread for qemu:///system 2012-02-29 10:56:13,727 (connection:1140): Background 'open connection' thread is running Thanks! Suyi Wang 2012/2/29 Eric Blake <eblake(a)redhat.com> > On 02/28/2012 10:23 AM, suyi wang wrote: > > Dear all: > > I ust installed Fedora16Fedora16 X86_64 on my new machine, and then I > > ran the commands as follows(ran as root): > > > > yum install qemu-kvm > > yum install qemu > > yum install libvirt > > yum install virt-manager > > > > then I started the libvirtd as follow: > > /etc/init.d/lbvirtd start > > > > So , it ran well. > > > > > > However, after a few days , when I ran the command "virt-manager" , it > > showed as bellow: > > > > > > > > it seemed that ti cannot connect the hipervisor. > > This list is plain-text only. Your embedded graphic (at least, I'm > assuming you attempted to embed a graphic) got eaten by the list server, > so we don't know what message you got. Can you paste the actual error > message you got? > > Meanwhile, we have a wiki page for diagnosing common problems. Perhaps > your issue is covered by one of the items there; and if not, it would > help if you could add a new page with the steps you take in resolving > the issue. http://wiki.libvirt.org/page/Troubleshooting > > > > > > > Then I did a little test: > > I ran the conmand "virsh list" , but it didnot work,either. > > Again, knowing the exact output of 'virsh -c qemu:///system list', > rather than just saying it didn't work, will help others in diagnosing > your issue. > > -- > Eric Blake eblake(a)redhat.com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >

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[libvirt-users] Unable to connect qemu:///system on Fedora16 X86_64
by suyi wang 29 Feb '12

29 Feb '12

Dear all: I ust installed Fedora16Fedora16 X86_64 on my new machine, and then I ran the commands as follows(ran as root): yum install qemu-kvm yum install qemu yum install libvirt yum install virt-manager then I started the libvirtd as follow: /etc/init.d/lbvirtd start So , it ran well. However, after a few days , when I ran the command "virt-manager" , it showed as bellow: it seemed that ti cannot connect the hipervisor. Then I did a little test: I ran the conmand "virsh list" , but it didnot work,either. Then I used Python as follows: import libvirt cc = libvirt.open(r'qemu:///system') but it didnot work,either. All the test above are under root . I hope that someone can give me some suggestiion. Thanks to all! Suyi Wang

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[libvirt-users] Bug? virGetLastError() returns NULL after virDomainCreate() if Domain running already
by Guido Winkelmann 28 Feb '12

28 Feb '12

Hi, As the subject line indicates, when I'm calling virDomainCreate() to start a defined domain, and that command fails because the domain is already running at that point, virGetLastError() will return NULL, instead of a proper pointer to an error code. Libvirt will, however, print an error to the console: libvir: QEMU error : Requested operation is not valid: domain is already running This looks like a bug to me, and I'm fairly certain that earlier version would return an error code of VIR_ERR_OPERATION_INVALID at that point. Or maybe that was just virDomainDestroy(), and I'm just blindly assuming that virDomainCreate() will work analogously... Anyway, no error code is bad, because I can't tell what happened. This is version 0.9.8. I couldn't find anything about this issue in the changelogs for 0.9.9 and 0.9.10, so I'm assuming the issue has not been addressed since. Guido

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[libvirt-users] Sys::Virt
by Evaggelos Balaskas 28 Feb '12

28 Feb '12

Can anyone help me: $ perl Makefile.PL Checking if your kit is complete... Looks good Writing Makefile for Sys::Virt Writing MYMETA.yml and MYMETA.json $ make /usr/bin/perl "-Iblib/arch" "-Iblib/lib" perl-Sys-Virt.spec.PL perl-Sys-Virt.spec make: *** [perl-Sys-Virt.spec] Segmentation fault make: *** Deleting file `perl-Sys-Virt.spec' Evaggelos Balaskas - Unix System Engineer http://gr.linkedin.com/in/evaggelosbalaskas

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[libvirt-users] Not able to mount iSCSI volume to Guest VM
by Sarath P R 25 Feb '12

25 Feb '12

Hi All, I have created a 10GB logical volume in iSCSCI target machine. I am abe to mount the volume in my Dom0 . But I am not able to attach the volume to Guest VM I tried "<pool type='iscsi'>"+ "<name>virtvolume</name>"+ "<source>"+ "<host name='192.168.1.1'/>"+ "<device path='"+src+"'/>"+ "</source>"+ "<target>"+ "<path>/dev/disk/by-path</path>"+ "</target>"+ "</pool>" I Could create a storage pool using the above xml. But how can I attach that volume to the guest VM. Please Help. Thanks in Advance -- Thank You Sarath P R

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[libvirt-users] lockmanager for use with clvm
by Michael Menge 25 Feb '12

25 Feb '12

Hi, i am setting up a cluster of kvm hypervisors managed with libvirt. The storage pool is on iscsi with clvm. To prevent that a vm is started on more than one hypervisor, I want to use a lockmanager with libvirt. I could only find sanlock as lockmanager, but AFSIK sanlock will not work in my setup as I don't have a shared filesystem. I have dlm running for clvm. Are there lockmanager implementations that use dlm? Or other implementations that can be used in my setup? Regards Michael Menge -------------------------------------------------------------------------------- M.Menge Tel.: (49) 7071/29-70316 Universität Tübingen Fax.: (49) 7071/29-5912 Zentrum für Datenverarbeitung mail: michael.menge(a)zdv.uni-tuebingen.de Wächterstraße 76 72074 Tübingen

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[libvirt-users] Regarding file vs block devices for the guest
by Udayan Bapat 25 Feb '12

25 Feb '12

Hi There is a general consensus in regards to use of a block device (exported partition) over a file device (.img or .qcow2) image. It is expected to see a big performance jump in case of a block device. However in my test I have seen it is not always the case. My testbed has Fedora-14.0 as the host and Ubuntu-10.0 as guest running on Intel x86 4 core/8 thread VTX enabled system. I ran file system benchmarks from the guest using iozone and measure throughput as well as CPU utilization. I observed that upto device sizes of 8 GB, file device (.img with ext3 partition) consistently outperformed block device (ext3 partition exported directly to the guest). Is similar anomaly seen by the community too? If not, i.e. block device should always outperform file, which layer should I be looking at to understand what could be happening. Just to make sure, I repeated same test a bunch of times to eliminate noise. As I increased the HDD size, then block device performance drastically improved and consistently performed better than fileIO. In both tests, my guest had 512 MB RAM with 1 vcpu. I ran all 11 iozone test to do performance comparisons. Any pointer/insight would be extremely helpful. Thank you in advance. -- Udayan

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Re: [libvirt-users] [SeaBIOS] RFE: Print amount of RAM
by Igor Galić 23 Feb '12

23 Feb '12

Cross posting from seabios@ [snip] > > Now I'd like to ask you guys if you could print the amount > > of RAM available -- like most other BIOSes out there already > > do - it would be extremely helpful to aid troubleshooting. > > SeaBIOS boots too fast for anything useful to be seen on the screen. > That said, one can add "-chardev stdio,id=seabios -device > isa-debugcon,iobase=0x402,chardev=seabios" to the qemu command line > to > see the SeaBIOS debugging output. That output has the memory info > and much more. I guess that's then something to propose for libvirt as RFE as an extra argument for <bios useserial='yes' /> we could introduce <bios useserial='debug' /> perhaps. > -Kevin Thanks Kevin. So long, i -- Igor Galić Tel: +43 (0) 664 886 22 883 Mail: i.galic(a)brainsware.org URL: http://brainsware.org/ GPG: 6880 4155 74BD FD7C B515 2EA5 4B1D 9E08 A097 C9AE

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