January 2012 - Users - libvirt List Archives

[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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