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[libvirt-users] web frontend for managing libvirt servers
by Christian Parpart 17 Jan '12

17 Jan '12

Hi all, I know that redhat has some web based GUI for managing libvirt clusters, however, I am not having purchased redhat :-) Is there any good open-source web frontend you can recommend for managing your libvirt instances? Ideally with VNC/spice support for connecting to the remote? I know of proxmox, which we used so far for our openvz containers, but I am about to migrate to KVM (and possibly linux-vserver / LXC). Many thanks, Christian.

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Re: [libvirt-users] (no subject)
by Marko Weber 17 Jan '12

17 Jan '12

Hallo Christian, have look on ovirt (redhat). ovirt-node.x86_64 : The RHEV Hypervisor daemons/scripts ovirt-node-tools.noarch : RHEV Hypervisor tools for building and running an RHEV Hypervisor image Dunno if you can compare it too vmware vcenter, but ovirt is what i think you need to manage vm's and hosts. clustering motion etc Its in the Repos for Centos. Marko Am 17.01.2012 10:20, schrieb Christian Parpart: > Hi all, > > I know that redhat has some web based GUI for managing libvirt > clusters, > however, I am not having purchased redhat :-) > > Is there any good open-source web frontend you can recommend for > managing > your libvirt instances? Ideally with VNC/spice support for connecting > to the remote? > > I know of proxmox, which we used so far for our openvz containers, > but > I am about > to migrate to KVM (and possibly linux-vserver / LXC). > > Many thanks, > Christian. > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users

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[libvirt-users] sorry, choosed wrong recipient....
by Marko Weber 17 Jan '12

17 Jan '12

Hi Michal, Am 17.01.2012 09:19, schrieb Michal Privoznik: On 16.01.2012 23:04, Marko Weber wrote: Hi Michal, i cant say the USEFLAGS, cause i removed at end the package, heres a cut of logfile /var/log/libvirt/libvirt.log 2012-01-15 19:48:11.960+0000: 21586: error : virCommandWait:2192 : Interner Fehler Child process (/sbin/iptables --table mangle --insert POSTROUTING --out-interface virbr0 --protocol udp --destination-port 68 --jump CHECKSUM --checksum-fill) status unexpected: exit status 1 2012-01-15 19:48:11.960+0000: 21586: warning : networkAddGeneralIptablesRules:1259 : Could not add rule to fixup DHCP response checksums on network 'default'. 2012-01-15 19:48:11.960+0000: 21586: warning : networkAddGeneralIptablesRules:1260 : May need to update iptables package & kernel to support CHECKSUM rule. 2012-01-15 19:48:11.977+0000: 21586: error : virCommandWait:2192 : Interner Fehler Child process (/sbin/iptables --table filter --insert FORWARD --in-interface virbr0 --jump REJECT) status unexpected: exit status 1 2012-01-15 19:48:11.977+0000: 21586: error : networkAddGeneralIptablesRules:1296 : Hinzufügen der iptables-Regel zum Blockieren von ausgehenden Daten von 'virbr0' fehlgeschlagen 2012-01-15 19:55:06.133+0000: 21589: error : virConnectNumOfInterfaces:9803 : this function is not supported by the connection driver: virConnectNumOfInterfaces This part says libvirt was not able to insert iptables rules for a virtual network (NAT). This can be harmless if such rules already exists. 2012-01-15 22:11:54.664+0000: 12093: info : libvirt version: 0.9.8 2012-01-15 22:11:54.664+0000: 12093: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi ) status unexpected: exit status 1 2012-01-15 22:12:01.356+0000: 12196: info : libvirt version: 0.9.8 2012-01-15 22:12:01.356+0000: 12196: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi ) status unexpected: exit status 1 2012-01-15 22:16:28.260+0000: 32646: info : libvirt version: 0.9.8 2012-01-15 22:16:28.260+0000: 32646: error : virCommandWait:2192 : Interner Fehler Child process (/sbin/iptables --table mangle --insert POSTROUTING --out-interface virbr0 --protocol udp --destination-port 68 --jump CHECKSUM --checksum-fill) status unexpected: exit status 1 2012-01-15 22:16:28.260+0000: 32646: warning : networkAddGeneralIptablesRules:1259 : Could not add rule to fixup DHCP response checksums on network 'default'. 2012-01-15 22:16:28.260+0000: 32646: warning : networkAddGeneralIptablesRules:1260 : May need to update iptables package & kernel to support CHECKSUM rule. 2012-01-15 22:16:28.277+0000: 32646: error : virCommandWait:2192 : Interner Fehler Child process (/sbin/iptables --table filter --insert FORWARD --in-interface virbr0 --jump REJECT) status unexpected: exit status 1 2012-01-15 22:16:28.277+0000: 32646: error : networkAddGeneralIptablesRules:1296 : Hinzufügen der iptables-Regel zum Blockieren von ausgehenden Daten von 'virbr0' fehlgeschlagen 2012-01-15 22:16:28.392+0000: 32646: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi ) status unexpected: exit status 1 2012-01-15 22:21:36.668+0000: 20936: info : libvirt version: 0.9.8 2012-01-15 22:21:36.668+0000: 20936: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi ) status unexpected: exit status 1 2012-01-15 22:25:14.718+0000: 8026: info : libvirt version: 0.9.8 2012-01-15 22:25:14.718+0000: 8026: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi ) status unexpected: exit status 1 2012-01-15 22:25:16.311+0000: 8018: error : do_open:1213 : no connection driver available for No connection for URI qemu:///system 2012-01-15 22:25:16.312+0000: 8015: error : virNetSocketReadWire:996 : End of file while reading data: Eingabe-/Ausgabefehler 2012-01-15 22:25:16.333+0000: 8016: error : do_open:1213 : no connection driver available for No connection for URI qemu:///system 2012-01-15 22:25:16.333+0000: 8015: error : virNetSocketReadWire:996 : End of file while reading data: Eingabe-/Ausgabefehler This part is actually really wrong. Libvirt was unable to find any qemu. Do you have any qemu installed? 2012-01-15 22:25:16.508+0000: 8102: info : libvirt version: 0.9.8 2012-01-15 22:25:16.508+0000: 8102: error : virCommandWait:2192 : Interner Fehler Child process (/bin/sh -c EBT=/sbin/ebtables cmd='$EBT -t nat -L' eval res=\$$"${cmd} 2>&1"$ if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi I can give a try with your USEFLAGS. Yeah, i bet it will work with them :) Ok Ok, Tada!!!! after recompiling with the recommended useflags and "restarting" of libvirt = Tada! It works! Is the logfile informativ for you? Marko Btw, on my Centos6 Boxes all is running like a charme. Well, Centos/RHEL have strict dependencies for packages and therefore force user to install many packages which user doesn't need in the end. That's why we are using Gentoo, right? :) Yes, right. But for customer related server i feel good to use enterprise linux. Gentoo is my personal fav and love ;-) I wanted to give a try on latest vanilla 3.2.1 - it works like charm now , libvirt, virt-manager. Only trick i have to use is, before creating new virtual machine, i have to a new harddisk for the vm. When i do this in the process of creating new virtual machine, i cant select (in step 3?) where to define the disk. the windows just pop up for 1 sec and is gone, i have to kill then the virt-manager and restart all. what i really like is, when use Centos as Guest, u can use virtio from beginning on hard disk and ethernet. E.g. on Centos it is not easy to install just libvirt without qemu. However, it is perfectly simple to do so on Gentoo. Michal

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[libvirt-users] libvirt 0.9.0 on gentoo linux, problem network
by Marko Weber 16 Jan '12

16 Jan '12

Hello to the list at first - i am first time here. i setup on my gentoo box libvirt and virt-manager. when i fireup virt-manager all seems okay. when i want to create a new virtual machine it seems all okay, until the step when i want to add an iso image to the cdrom. i notcied that i cant choose to connect cdrom, also the network is not found. i can post error codes from log when needed, just wanted to ask, if someone here had same behaviour and a solution for it. marko

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[libvirt-users] Clone VM
by Boris Tobotras 16 Jan '12

16 Jan '12

Greets, I've began to try libvirt API and looking for most correct way to clone existing VM (Xen server if it matters). Since API lacks this functionality how does one usually go about it? Thanks in advance, -- Best regards, -- Boris. We have a lot of strategies, but always the same tactics.

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[libvirt-users] virt-install Error
by Nitin Nikam 16 Jan '12

16 Jan '12

Hi All, I'm trying to install a VM on host OS (Redhat 6.1, KVM hypervisor). I've installed all the required RPMs for KVM and libvirt tools. Here is the list of libvirt RPMs and KVM modules *kvm.ko kvm-intel.ko libvirt-0.8.7-18.el6.x86_64.rpm libvirt-java-devel-0.4.7-1.el6.noarch.rpm virt-top-1.0.4-3.8.el6.x86_64.rpm libvirt-client-0.8.7-18.el6.x86_64.rpm libvirt-python-0.8.7-18.el6.x86_64.rpm virt-viewer-0.2.1-3.el6.x86_64.rpm libvirt-devel-0.8.7-18.el6.x86_64.rpm python-virtinst-0.500.5-3.el6.noarch.rpm virt-what-1.3-4.4.el6.x86_64.rpm libvirt-java-0.4.7-1.el6.noarch.rpm virt-manager-0.8.6-4.el6.noarch.rpm qemu-img-0.12.1.2-2.160.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.160.el6.x86_64.rpm *When I execute virt-install command I see the below error: *[root@nsn /]# virt-install* *ERROR Host does not support any virtualization options* I've already cross checked the VMX setting in BIOS and it is enabled. In VMX Feature MSR register , VT bit is set. Following is some info about the platform: *[root@nsn /]# uname -a* Linux rsp3-linux 2.6.32.27 #170 SMP PREEMPT Thu Jan 12 09:03:12 IST 2012 x86_64 GNU/Linux *[root@nsn /]# cat /proc/cpuinfo* processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 30 model name : Intel(R) Xeon(R) CPU C5528 @ 2.13GHz stepping : 4 cpu MHz : 2127.723 cache size : 8192 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 6 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid bogomips : 4259.94 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: *[root@nsn /]# lsmod | grep kvm* kvm_intel 36839 0 - Live 0xffffffffa016c000 kvm 149478 1 kvm_intel, Live 0xffffffffa0137000 has anyone encountered similar issues while using libvirt tools? am I missing something w.r.t installation? Appreciate your feedback. Thanks, kenden

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[libvirt-users] (no subject)
by Алексей Беляев 13 Jan '12

13 Jan '12

Hello! I just installed the qemu package 1.0. Trying to start my vms with libvirt (virt-manager) resulted in the following error message: internal error cannot parse /usr/local/bin/qemu-system-arm version number in 'QEMU emulator version 1.0, Copyright (c) 2003-2008 Fabrice Bellard' After that I installed the qemu package 0.15 and i didn't receive error. But i have problems with device virtio-balloon-pci: internal error process exited while connecting to monitor: qemu-system-arm: -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4: Bus 'pci.0' not found Libvirt doesn't support qemu 1.0 or it only couldn't parse version of emulator? -- Regards, Belyaev Alex

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[libvirt-users] Libvirt API for C/C++ : Monitoring Support
by pratik.patel＠snstech.com 12 Jan '12

12 Jan '12

Greetings, I am a developer, trying to develop a system for monitoring Servers and Virtual Machines using Libvirt API for C/C++. I am facing an issue that there are no functions for monitoring some parameters which I have listed below. I would like to know if there is any there way I can retrieve these parameters since they are critical to my Monitoring Application. Also I am using CentOS 5.6 as a development machine which only supports up to libvirt-devel package version 0.8.2 due to which I am unable to use the newer development binaries (which are only built for newer RedHat kernels) which have support for certain functions that do not work on the one I am using. List of parameters: For Server Monitoring: 1. Memory Swap-In 2. Memory swap-Out 3. Disk Usage 4. Disk Read 5. Disk write 6. Disk Total Read Latency 7. Disk total Write Latency 8. Network Usage 9. Network Packets Received 10. Network Packets Sent 11. CPU utilization 12. CPU Usage For Virtual Machine Monitoring: 1. Memory Utilization 2. Memory Consumption 3. Memory swap-In 4. Memory Swap-Out 5. Disk Usage 6. Disk Read 7. Disk Write 8. Disk Total Read Latency 9. Disk total write Latency 10. Network Usage 11. Network Packets Received 12. Network Packets Transmitted 13. CPU utilization 14. CPU Usage Regards, Pratik. Email Disclaimer: http://www.snstech.com/disclaimer.html

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[libvirt-users] LXC with RHEL 6.1
by John Paul Walters 12 Jan '12

12 Jan '12

I'm trying to start a RHEL 6.1 container on an RHEL 6.1 host through libvirt 0.9.3. I've removed most of the startup services from the guest container, except the network and sshd. I can get the system to boot to a login prompt and can access the console through virsh; however, as soon as I authenticate, I get the following error message: Cannot make/remove an entry for the specified session init: tty (/dev/tty1) main process (372) terminated with status 1 init: tty (/dev/tty1) main process ended, respawning After this, I'm again left at the login prompt. I'm also unable to establish an ssh session, which I assume is related to the issue I'm having with the virsh console. Can anyone offer any suggestions as to what's going on here? I'm using the following XML for my domain creation: <domain type='lxc'> <name>RHEL6</name> <memory>512000</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/media'/> <target dir='/'/> </filesystem> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> Any thoughts? best, JP

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[libvirt-users] When IPv6 is disabled, libvirtd cannot start on boot
by Lei Yang 12 Jan '12

12 Jan '12

Hi all, When IPv6 is disabled in modprobed.conf through: > options ipv6 disable=1 libvirtd cannot start on boot, it produces the following debug message: > libvirtd: 1545: error : virCommandWait:2192 : internal error Child process (/bin/sh -c IPT=/usr/sbin/ip6tables > cmd='$IPT -n -L FORWARD' > eval res=\$$"${cmd} 2>&1"$ > if [ $? -ne 0 ]; then echo "Failure to execute command '${cmd}' : '${res}'."; exit 1;fi > > libvirtd: 851: error : virNetSocketNewListenTCP:226 : Unable to create socket: Address family not supported by protocol > > However, I can successfuly start libvirtd later on without IPv6 support. I think IPv6 is disabled in the early stage during system boot, so libvirtd should not assume the IPv6 is in exist during service start. But I could be wrong, please point me out, Thanks. My OS: Linux 3.1.7-1-ARCH /etc/rc.conf: DAEMONS=(hwclock dbus syslog-ng network netfs crond sshd libvirtd) -- Lei Yang

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[libvirt-users] libvirt + qemu-system-arm
by Алексей Беляев 12 Jan '12

12 Jan '12

Greetings. Is it possible to run virtual machines for arm architecture under libvirt? I run my machines with qemu-system-arm and i try to make XML file for them, but receive errors. In this manual "How To: Running Fedora-ARM under QEMU" ( http://fedoraproject.org/wiki/Architectures/ARM/HowToQemu#Using_networking_… ) i found xml for VM under arm(http://cdot.senecac.on.ca/arm/arm1.xml), but virsh define arm1.xml - print error: " internal error os type 'hvm' & arch 'arm' combination is not supported " -- Regards, Belyaev Alex

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[libvirt-users] Unable to close open libvirt connections
by Jatin Kumar 12 Jan '12

12 Jan '12

Hello, I was getting the following error in syslog: libvirtd: 21:19:12.116: 10955: error : qemudDispatchServer:1355 : Too many active clients (20), dropping connection from 127.0.0.1;0 I investigated a bit and tried the following in a python console: import libvirt ~~~~ conn=libvirt.openReadOnly("qemu+ssh://HOST_IP/system<http://10.16.71.1/system> ") //now check the no. of connections (by lsof|grep ESTABLISHED in the HOST), the count will increase by 1 conn.close() *//the count will decrease by 1, it returns 0* ~~~~ conn=libvirt.openReadOnly("qemu+ssh://HOST_IP/system<http://10.16.71.1/system> ") //now check the no. of connections, the count will increase by 1 dom=conn.lookupByName("sowmya") print dom.info() conn.close() *//the count will not change, it returns 1* * * This is creating a lot of trouble to me but the reason is unknown. If someone could please point me out, if i am missing something. -- Jatin

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[libvirt-users] Haskell bindings for libvirt
by Michael Litchard 12 Jan '12

12 Jan '12

I'm exploring the possibility of developing bindings for libvirt. I've never done this kind of project before. Could someone point me to the documentation of particular interest concerning this goal?

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[libvirt-users] Looking for feedback
by Zorg 11 Jan '12

11 Jan '12

Hello list! I'm currently digging into libvirt-based virtualisation infrastructure (KVM/Qemu Hypervisors so far). I have a little concern here: Let's say we have two hypervisors (I and II), running 3 VMs each - I runs a,b,c and II runs d,e,f. Virtual disks are stored on a centralized storage solution, let's say a good old cluster of NFS filers. Network configuration is homogenous on the two hypervisors -- same bridge names to the same ethernet segments. Basically, a, b and c are defined on I - the XML description is stored on I. So far, so good. Then let's say I crashes badly. The XML descriptions for a,b, and c are lost, the process of starting these VMs on II would involve re-defining it on II from a backup of XML descriptions. That's not quite an automated/fluent process, and the idea of doubling hypervisors into a HA cluster just for that matter is clearly overkill to me. Are you, by chance, aware of an OpenSource libvirt-based solution that is able to keep track of each VM xmldesc, starting lost guests as transient domains on another hypervisor upon failure of the original hypervisor ?

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[libvirt-users] Communication with Hyper-V
by Vadim Gurevich 10 Jan '12

10 Jan '12

Hi, I'm interested in using libvirt to communicate with Microsoft's Hyper-V. I'm trying to use virsh, but with no success. I have a machine that runs Windows Server Developer Preview with Hyper-V on it, ip x.x.x.x I set the service Basic and AlloUnencrypted properties on this machine to true, as required I also have a Linux machine x.x.y.y, with libvirt installed. This is what I get: virsh -c hyperv://x.x.x.x/?transport=http error: Cannot read CA certificate '/etc/pki/CA/cacert.pem': No such file or directory error: failed to connect to the hypervisor My questions are: 1. As I understand, if my hypervisor was on Linux, there's a daemon "libvirtd" that should be installed on it. Is there an equivalent service for Windows? I installed this thing on the Hyper-V machine: http://libvirt.org/sources/win32_experimental/Libvirt-0.8.8-0.exe, but am not sure about its purpose. 2. Why do I get an error about certificate, when I specified the transport to be http? Thanks, Vadim

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[libvirt-users] Host and VM performance using libvirt
by Ananth 09 Jan '12

09 Jan '12

Hi, Is there any libvirt API for measuring the Host and VM performance parameters. Or is there any virsh command implementing the same for KVM? eg: CPU utilization, memory utilization, load percentage, CPU Mhz etc., -- Regards Ananth

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[libvirt-users] libvirt-bin always hung
by mao weijie 09 Jan '12

09 Jan '12

I have installed libvirt-bin in my ubuntu 11.10 libvirt-bin version is 0.9.2.-4 ubuntu15.1 But running after a time, it is always hung. It is not response if I use "virt" . And openstack using libvirt too, it also does not work. 非淡泊無以明志，非寧靜無以致遠

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[libvirt-users] hooks not working on Ubuntu
by Zoltan Lippai 09 Jan '12

09 Jan '12

Hi everybody! I was trying to set up port forwarding to one of my VM's but I'm stuck. I was following this guide: http://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections So I've created the hook script but it seems like libvirt is not calling it upon the start of the VM. I've put this into the hook script: date >> /tmp/libvirt-hook-debug but the file was never created. Also I put this in the script: echo "Could not find required XYZZY" >&2 exit 1 (just to make sure) This should show up in the libvirt log, but it's not there. I think it is safe to say, that this script is never called. I am using Ubuntu 11.10 and I know about the apparmor.d bug (https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/891472) so I tried to change the apparmor profile as suggested, I even tried to turn apparmor off temporarily (service apparmor teardown) but still no luck. I have libvirt 0.9.2-4ubuntu15.1 (they say the bug is fixed in 0.9.7 but it's not yet available in the repo and I'm not even sure, that my problem is related to that bug). So do you have any idea what could be going on in here? Thanks, Zoltan Lippai

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[libvirt-users] Libvirtd slowness
by Nathan March 06 Jan '12

06 Jan '12

Hi, Can anyone tell me if it's normal to take over 2 seconds to connect to the libvirt daemon? xen1 ~ # time virsh -c 'xen://xen5/' pwd real 0m2.102s xen1 ~ # time virsh -c 'xen://xen1/' pwd real 0m2.217s Strace shows it sitting for 2.08s on polling the remote socket: poll([{fd=6, events=POLLIN}, {fd=7, events=POLLIN}], 2, -1) = 1 ([{fd=6, revents=POLLIN}]) <2.082839> Not quite sure why though? Experiencing this on both 0.9.7 and 0.9.0. This happens both with virsh and the perl libvirt bindings. If i just spawn virsh interactively I only incur that 2s hit on intial spawn, all commands are very quick and responsive. Anyone have any suggestions? - Nathan -- Nathan March<nathan(a)gt.net> Gossamer Threads Inc. http://www.gossamer-threads.com/ Tel: (604) 687-5804 Fax: (604) 687-5806

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[libvirt-users] Python bindings for libvirt
by Ananth 06 Jan '12

06 Jan '12

Hi, I referred to the developer guide in libvirt.org regarding python bindings. But the document says TBD and it was last updated in 2010. Could you point to any sources regarding python bindings to call libvirt APIs? -- Regards Ananth

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[libvirt-users] Issue with event registration
by Tyrion Lannister 05 Jan '12

05 Jan '12

Hi, I could find only one post related to this, but that did not address my problem. I am trying to register for VM events using virConnectDomainEventRegisterAny, but that is returning with the error "libvir: Remote error : this function is not supported by the connection driver: no event support" I have registered for the default event implementation (as suggested in the response to an earlier post related to this problem) prior to calling *RegisterAny, but that is not helping. Browsing through the coe, it seems to me this has to do with the timer support in the domainEventState, just a guess. if (priv->domainEventState->timer < 0) { remoteError(VIR_ERR_NO_SUPPORT, "%s", _("no event support")); goto done; } I am using Centos 6 with KVM QEMU. Thanks, Suresh

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[libvirt-users] libvirt-java: generate Java code from rng schema
by Celsina Bignoli 05 Jan '12

05 Jan '12

Hi, I am a quite new to libvirt, and need to use it from within Java code. I was wondering if anyone has been able to generate Java classes from the publisher rng schema. I also wonder why rng format was used over more common formats, which would make things easier since there are a number of code generators for it which are well established, at least in the Java world... Any suggestion would be greatly appreciated. Thank you, elsa

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[libvirt-users] Feasibility of iscsi storage pool
by Dennis Jacobfeuerborn 05 Jan '12

05 Jan '12

Hi, I want to start using iscsi storage but ran into a problem. I defined a storage pool and this contains my first LUN which is mounted on a hypervisor. When I now add a second LUN on a target and do a tgt-admin --update --force to reload the target the i/o to the first LUN seems to freeze for a few seconds. Now I'm wondering if I'm doing anything wrong? It's not really tolerable to have all guests using this target freeze simply because I want to add another LUN. The alternative is to use one LUN per target and define lots of targets on the server but then the whole pool configuration no longer makes sense as I would essentially end up with one pool per guest volume. Does anyone have experience with this kind of setup? Regards, Dennis

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[libvirt-users] [LIBVIRT] Xen issue.
by Armand Leclercq 04 Jan '12

04 Jan '12

Hi everybody, I'ld to use virsh over ssh in order to connect to my xen hypervisor from one of my DomU. I tried: virsh -c xen+ssh://root@192.168.0.67:22 list --all And it correctly listed the started virtual computers. And when I tried virsh connect xen+ssh://root@192.168.0.67:22 And I got. error: no connection driver available for xen:/// error: failed to connect to the hypervisor Does that mean I wrongly configured my computers or that libvirt does not support such connection from a DomU. -- Armand Leclercq EPITA 2013 06 71 57 90 73 armand.leclercq(a)gmail.com. /Computer Science is embarrassed by the computer./ _Alan Perlis_

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[libvirt-users] Hotplug/hotadd functionality of libvirt?
by Kees van Reeuwijk 03 Jan '12

03 Jan '12

Hello, First of all, happy new year! I am interested in the hot plugging facilities of libvirt, in particular in what qemu calls 'hot add' of network interface cards. (And also the reverse: hot unplugging/removing of NICs.) I think I am overlooking something, but so far the best I have been able to find is: http://libvirt.org/sources/virshcmdref/html/ and it is not entirely clear to me what the relevant virsh commands are. The most obvious choice seems to be the iface-* commands such as http://libvirt.org/sources/virshcmdref/html/sect-iface-define.html but these seem to be about physical rather than virtual network interfaces, and the documentation `needs to be written' anyway, and from the copyright notice the manual seems to be somewhat outdated by now. Can you give me a little help with this? Is such hot plug/add functionality supported by libvirt in the first place? Is there some kind of overview document about this? What is the most authoritative documentation of this functionality? Is there a Java or C API to access this functionality? Thank you for any help you can give me, -- Kees van Reeuwijk

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