January 2012 - Users - libvirt List Archives

[libvirt-users] virsh list not working with xen 4
by Rogério Vinhal Nunes 21 Sep '12

21 Sep '12

Hi, I'm having some trouble to get libvirt to show the correct power state of my virtual machines. I'm using Ubuntu 10.04 + Xen 4.1.1 + libvirt 0.8.8. virsh list --all only shows turned off machines registered in xend. If I turn them on, they just "disappear", and when I start machines directly from xml, they just doesn't appear at all. Libvirt is correctly connecting to xen as I can use the other commands fine, just the list option doesn't seem to work at all. What can I do to change that? # virsh version Compiled against library: libvir 0.8.8 Using library: libvir 0.8.8 Using API: Xen 3.0.1 Running hypervisor: Xen 4.1.0

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[libvirt-users] converting save/dump output into physical memory image
by Andrew Tappert 04 Jun '12

04 Jun '12

A lot of people in the security community, myself included, are interested in memory forensics these days. Virtualization is a natural fit with memory forensics because it allows one to get access to a guest's memory without having to introduce any extra software into the guest or otherwise interfere with it. Incident responders are particularly interested in getting memory dumps from systems they're investigating. Virsh has "save" and "dump" commands for storing the state of a guest to a file on disk, but memory of KVM guests doesn't get saved in the "standard" input format for memory forensics tools, which is a raw physical memory image. (This is what you'd get via the classical "dd /dev/mem" approach or the contemporary equivalent using the crash driver; and VMware Server and Workstation produce .vmem files, which are such raw physical memory images, when a guest is paused or snapshotted.) In order to analyze the memory of Libvirt/KVM guests with my Linux memory forensics software, Second Look, I've created a tool for converting Libvirt-QEMU-save files (output of virsh save command) or QEMU-savevm files (output of virsh dump command) to raw physical memory images. I've got a basic working capability, though I'm still tracking down some problems with a guest allocated 8GB RAM--not all the memory seems to be present in the save or dump file. And I haven't tested very extensively yet, version support is limited to what I myself am currently running, etc. I'd like to know if this is a capability that others are interested in. Is this something that would be of interest to the Libvirt project if I were to contribute the code, or to the KVM project, or do you think it best exists as a separate project? I've also got a proof-of-concept tool for converting hibernate images to raw physical memory images. Perhaps a collection of tools for converting various memory dump formats would be a good project. Anyone else interested in this kind of stuff? As an author of commercial memory forensics software I've got a vested interest in availability of good memory acquisition capabilities. But there are a number of people working on FOSS Linux memory analysis tools, too... Andrew

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[libvirt-users] Thread-safety issues with vbox driver ?
by Jean-Baptiste Rouault 19 Apr '12

19 Apr '12

Hi, I'm experiencing weird things with the vbox driver when using multiple threads. Following is the snippet of code I experience problems with /*****************************************************/ #include <stdlib.h> #include <stdio.h> #include <pthread.h> #include <libvirt/libvirt.h> void *create_and_destroy(void *arg) { virDomainPtr dom = (virDomainPtr)arg; char buf[VIR_UUID_STRING_BUFLEN]; virDomainGetUUIDString(dom, buf); if (virDomainCreate(dom) != 0) { printf("failed to start %s\n", buf); goto end; } printf("%s started\n", buf); if (virDomainDestroy(dom) != 0) { printf("failed to destroy %s\n", buf); } printf("%s destroyed\n", buf); end: virDomainFree(dom); pthread_exit(NULL); } int main(int argc, char **argv) { virConnectPtr conn = virConnectOpen("vbox:///session"); int i; int count = virConnectNumOfDefinedDomains(conn); char **names = malloc(count * sizeof(char *)); virConnectListDefinedDomains(conn, names, count); virDomainPtr *doms = malloc(count * sizeof(virDomainPtr)); for (i = 0 ; i < count ; ++i) { doms[i] = virDomainLookupByName(conn, names[i]); } pthread_t *threads = malloc(count * sizeof(pthread_t)); pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); for (i = 0 ; i < count ; ++i) { pthread_create(&threads[i], &attr, create_and_destroy, (void *)doms[i]); } pthread_attr_destroy(&attr); for (i = 0 ; i < count ; ++i) { pthread_join(threads[i], NULL); } virConnectClose(conn); pthread_exit(NULL); } /************************************************/ Here is the output of the program with 2 defined domains: > libvir: VBOX error : operation failed: OpenRemoteSession/LaunchVMProcess failed, domain can't be started > failed to start c538c89a-70da-42ab-a88a-5aeb15698c12 > 034cf837-abe7-4c48-8373-0ddcf480d416 started > 034cf837-abe7-4c48-8373-0ddcf480d416 destroyed Sometimes the first domain really fails to start, but sometimes it starts correctly but libvirt reports an error. Sometimes domains aren't destroyed but libvirt reports no error at all. If there is only one domain, no problem occurs at all. I also tried the same code (ie with multiple domains) but with only one thread and it works well. I managed to reproduce these issues with libvirt 0.9.4, 0.9.7, using VirtualBox 4.0 and 4.1. -- Jean-Baptiste ROUAULT Ingénieur R&D - diateam : Architectes de l'information Phone : +33 (0)9 53 16 02 70 Fax : +33 (0)2 98 050 051

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[libvirt-users] Network questions
by paul.worner＠thomsonreuters.com 06 Feb '12

06 Feb '12

Hi all, When creating a new network: 1) Is there a way to disable automatic spawning of dnsmasq on network creation? I read that leaving out the <DHCP> section should accomplish this, but that is not what I am seeing. 2) Is there a way to disable automatic installation of iptables rules? 3) For that matter, what is the purpose of the default iptables rule set? Doesn't line 3 let all traffic pass anyway? Thanks, Paul Running libvirt 0.9.2 on Ubuntu 11.10 server. Here's the libvirt network config: RAW CONFIG <network> <name>test</name> <bridge name="virbr%d" stp="off" delay="0"/> <forward mode="route"/> <ip address="192.168.0.1" netmask="255.255.255.0"> </ip> </network> COMMAND virsh net-create test.xml RESULTS virsh net-dumpxml test <network> <name>test</name> <uuid>2eff5e7f-847a-1fbf-ec82-01a46ef0f6c2</uuid> <forward mode='route'/> <bridge name='virbr3' stp='off' delay='0' /> <mac address='52:54:00:47:E6:15'/> <ip address='192.168.0.1' netmask='255.255.255.0'> </ip> </network ps aux | grep dns nobody 4391 0.0 0.0 21616 916 ? S 09:45 0:00 dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/test.pid --conf-file= --except-interface lo --listen-address 192.168.0.1 iptables -L --line-numbers Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 ACCEPT all -- anywhere 192.168.0.0/24 2 ACCEPT all -- 192.168.0.0/24 anywhere 3 ACCEPT all -- anywhere anywhere 4 REJECT all -- anywhere anywhere reject-with icmp-port-unreachable 5 REJECT all -- anywhere anywhere reject-with icmp-port-unreachable

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[libvirt-users] Libvirt migration issues (0.9.4 and 0.9.9)
by Daniel Espling 31 Jan '12

31 Jan '12

Dear all, we're having two different problems with migrations in libvirt, running as root user on host machines with CentOS release 5.5 (Final), kernel: Linux 2.6.32.24 #3 SMP Fri Oct 29 16:22:02 BST 2010 x86_64 x86_64 x86_64 GNU/Linux First case: virsh version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.50 Migrations work well for a basic VM, but if we attach a disk to the usb bus migration is no longer possible and fails with the error message: "error: operation failed: migration job: is not active". This is regardless of if the device is mounted inside the VM or not (debian). Please find more information attached. If we attach the same (.iso based) disk to the scsi bus instead, migrations work as normal. ---- To mitigate this problem, we tried upgrading to a more recent libvirt version: Compiled against library: libvir 0.9.9 Using library: libvir 0.9.9 Using API: QEMU 0.9.9 Running hypervisor: QEMU 1.0.50 When trying to migrate a normal (debian) instance from one host to another using the same domain as in the previous successful case without any devices attached, migration fails with the error message "error: Unable to copy socket file handle: Invalid argument". The libvirt.log only has a similar single-line of information: 2012-01-30 15:44:46.772+0000: 7546: error : virNetSocketDupFD:787 : Unable to copy socket file handle: Invalid argument. The network configuration used here is the same as we successfully used in the 0.9.4 test case, using static ip's. Thankful for assistance, not really sure what to try next. :) Regards, Daniel Espling

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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 25 Jan '12

25 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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[libvirt-users] span port from cisco switch to host to guest using kvm
by nemus＠grayhatlabs.com 23 Jan '12

23 Jan '12

I am trying to get the equivalent of promisc mode to pass all received traffic to a kvm guest that is running snort. So I have a cisco switch with span port plugged into eh2 on my kvm host which is centos. I want the kvm host to forward all promisc traffic from the span port to the guest running snort of tcpdump. What would be the best way to do this?

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[libvirt-users] Kickstart file doesn't work
by Sarath P R 21 Jan '12

21 Jan '12

I am starting an instance passing xml configuration like this. Contents inside my kickstart file is this *apt-get install vim --assume-yes* . But I think kickstart is not considered while booting instance though I am able to start instance. Please help. Thanks in advance "<domain type='xen'>" + " <name>testVM-server</name>" +" <description></description>" +" <memory>524288</memory>" +" <currentMemory>524288</currentMemory>" +" <vcpu>1</vcpu>" + " <os>" * + " <type>hvm</type**>" + " <kernel>/home/x**entest/Desktop/**vmlinuz</kernel**>" + " <initrd>/home/x**entest/Desktop/**initrd</initrd>**" + " <loader>/usr/li**b/xen-4.1/boot/**hvmloader</load** er>" + " <boot dev='hd'/>" + " <cmdline>ks=http://10.30.6.3/testVM-server.cfg </cmdline>" + " </os>"* + " <on_poweroff>destroy</on_poweroff>" + " <on_reboot>destroy</on_reboot>" + " <on_crash>destroy</on_crash>" + " <devices>" + " <emulator>/usr/lib64/xen/bin/qemu-dm</emulator>" + " <disk type='file' device='disk'>" + " <driver name='tap' type='aio'/>" + " <source file='/home/xentest/Desktop/ubuntu-server.img'/>" + " <target dev='xvda'/>" + " </disk>" + " <interface type='bridge'>" + " <source bridge='br0'/>" + " <script path='/etc/xen/scripts/vif-bridge'/>" + " </interface>" + " <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='5900' autoport='yes' keymap='en-us'/>" + " <sound model='es1370'/>" + " </devices>" + "</domain>"; -- Thank You Sarath P R | cell +91.999.502.4287

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[libvirt-users] unable to get libvirt work with libxenlight
by 杨镭 20 Jan '12

20 Jan '12

Hi all: I am having problem with libxenlight as the underlying xen drive. I compiled libvirt with configure flag: "--with-libxl". However, the output of command: ldd libvirt.so did not show a symbol link to libxenlight.so. I assume it should link to it, but I could be wrong. To verify libxenlight is working, I then stopped xend. After this, virsh -c xen:/// list can not list Domain-0 anymore. Only start xend can it display correct Domain-0 and DomU information. My libvirt version 0.9.9, Xen is 4.1.2. BTW, the xl command itself is ok after turning off xend. -- lei yang

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[libvirt-users] libvirt with sasl shadow backend
by Robyn Bachofer 20 Jan '12

20 Jan '12

Hi list, i have a problem with virt-manager authentication over tcp. I tried it with virt-manager over non-TLS "TCP (SASL/Kerberos)" auth. and the sasl mechanism "shadow". The user (tested with unprivileged user and root) is allready in the group libvirt(d) and the process is running as root. The result on host: Jan 18 21:05:31 host libvirtd: 21:05:31.620: error : remoteDispatchAuthSaslStep:3691 : sasl step failed -20 (SASL(-13): user not found: no secret in database) on client (virt-manager gui): ... ('virtConnectOpenAuth() faild') .. I have tested it with tool "testsaslauthd" and their result: e.g.: # testsaslauthd -u root -p root 0: OK "Success." When i set it manually with saslpasswd: # saslpasswd2 -a libvirt root -p it works. Although I use, in the configuration of sasl, shadow, libvirt does not use it (i think so). Host: debian6.0.3 (squeez) libvirt 0.8.3 (deb) sasl2.1.23 (deb) :-) Best regards, Robyn

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[libvirt-users] How to use "virDomainMemoryStats"? I got 0 result.
by mao weijie 19 Jan '12

19 Jan '12

I use like this; int n = virDomainMemoryStats(dom, stats, 4, 0); I want to get men used and not used. If can , I want to get all output in stats. but "n" result is always 0. 非淡泊無以明志，非寧靜無以致遠

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[libvirt-users] Should Windows NT guest use all of a CPU?
by Richard Walker 19 Jan '12

19 Jan '12

I've "ported" an old VMware VM containing Windows NT 4 SP6 into libvirt/kvm/qemu and got it running (more or less). However, the CPU graph next to the VM in virt-manager shows it starts using 100% of the allocated CPU as soon as it reaches the "OS Loader" screen, and stays there even after Windows has booted and I've logged in. (There's a dip now and then, apparently when something other than idling happens!) Windows NT Task Manager shows the CPU usage at 0%. I've tried with and without ACPI, and with different CPU settings (none/default, qemu32, pentium). No difference. Host is running Fedora 16 x86_64 with the latest updates: gpxe-roms-qemu-1.0.1-4.fc16.noarch qemu-kvm-0.15.1-3.fc16.x86_64 qemu-system-x86-0.15.1-3.fc16.x86_64 qemu-common-0.15.1-3.fc16.x86_64 qemu-img-0.15.1-3.fc16.x86_64 libvirt-0.9.6-4.fc16.x86_64 libvirt-client-0.9.6-4.fc16.x86_64 libvirt-python-0.9.6-4.fc16.x86_64 virt-manager-common-0.9.0-7.fc16.noarch virt-manager-0.9.0-7.fc16.noarch No other VM (Linux or Windows) behaves this way. I thought NT was deemed to be "well behaved" (e.g., uses HLT instruction), so I'm wondering if this is normal. ps shows (except for bits I've hidden): /usr/bin/qemu-kvm -S -M pc-0.14 -cpu qemu32 -enable-kvm -m 384 -smp 1,sockets=1,cores=1,threads=1 -name BPrjwtest -uuid <hidden> -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/BPrjwtest.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -device lsi,id=scsi0,bus=pci.0,addr=0x6 -drive file=/home/libvirt/images/BPrjwtest.img,if=none,id=drive-ide0-0-0,format=raw -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=<hidden>,if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=2 -netdev tap,fd=30,id=hostnet0 -device ne2k_pci,netdev=hostnet0,id=net0,mac=<hidden>,bus=pci.0,addr=0x4 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:3 -vga vmware -device AC97,id=sound0,bus=pci.0,addr=0x5 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3

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[libvirt-users] possible to disable but not remove hardware?
by David Mansfield 18 Jan '12

18 Jan '12

I have a situation where I frequently need to "add" and "remove" a NIC, but each time I "add" it, I need the same MAC address. I'm using virt-manager mostly, but would be willing to use "virsh" if necessary, although it doesn't seem to hotplug the same way (something else to figure out another day ;-). It doesn't appear in the domain XML format that there is any "disabled" attribute than can be used. Is that true? Is there a different usage pattern to accomplish this? Thanks, David Mansfield Cobite, INC.

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[libvirt-users] Re: Cloud Init
by Nicolas Sebrecht 18 Jan '12

18 Jan '12

[ Please, keep cc'ing the list. ] The 18/01/12, Sarath P R wrote: > I am trying to start create an instance by passing configurations in xml > file > > dom = con.domainDefineXML(xmlDesc); > �� int id = dom.create(); > > I want to provide ssh access to the newly created vm. I am trying to > provide cloud service. so i want� the creation of vm and embedding ssh > inside the vm everything happen programatically. I think you're looking for libguestfs at http://libguestfs.org/ . Another approach would be you to have root ssh access to the guest and tunning the guest configuration via ssh. -- Nicolas Sebrecht

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[libvirt-users] virt-manager 0.9.0-r2 gentoo, no starting
by Marko Weber 18 Jan '12

18 Jan '12

getting this when starting virt-manager databunka src # virt-manager Traceback (most recent call last): File "/usr/share/virt-manager/virt-manager.py", line 383, in <module> main() File "/usr/share/virt-manager/virt-manager.py", line 285, in main raise RuntimeError(_("Unable to initialize GTK: %s") % gtk_error) RuntimeError: Kann GTK nicht initialisieren: could not open display i already remerged gtk marko

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[libvirt-users] Cloud Init
by Sarath P R 18 Jan '12

18 Jan '12

I want to start an instance using libvirt API. I want to provide ssh access for the user of the vm. Anyone know how to embed an ssh key into the instance. I came across cloud-init . but couldn't get a tutorial . Thanks in advance. -- Thank You Sarath P R | cell +91.999.502.4287

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[libvirt-users] Libvirt-LXC bug/error
by Samuel Hassine, Another Service 17 Jan '12

17 Jan '12

Hi all, I am trying to run LXC containers with the libvirt utils. I encountered many difficulties but solved all of them, except a last one... This is why I need your help. My problem is simple, here is the log of the command: http://pastebin.com/2zrjYLiT When I try to do: virsh --connect lxc:/// start instance-00000010 I have the errors: 2012-01-16 10:46:47.739+0000: 1: error : lxcContainerMountDevFS:518 : Failed to mount /dev/pts in container: No such file or directory And others (see the trace on pastebin). Does anybody have an idea about how to deal with this problem? Thanks for your answers. Best regards. Sam

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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

1 0

[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

1 0

[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

1 0

[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?

1 0

[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

2 1

[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

2 1

[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

1 0

[libvirt-users] hooks not working on Ubuntu
by Zoltan Lippai 08 Jan '12

08 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

1 1

[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

2 1

[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 04 Jan '12

04 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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