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[libvirt-users] How to configure selinux for lxc in libvirt
by Qiang Guan 01 Aug '14

01 Aug '14

Hi guys, I want to use selinux for my lxc vm starting by libvirt. How to configure this? Is there any documents about using selinux with libvirt? Thanks for any advice~ -- ------------ Jackie Best Regards

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[libvirt-users] multicast traffic no longer working after reboot
by Dennis Jacobfeuerborn 01 Aug '14

01 Aug '14

Hi, today a couple of Hypervisors got restarted due to a power outage. While the systems and the VMs on the are running fine multicast traffic between the guests is no longer working. I generate multicast udp packet using iperf in the guest and check on the host using tcpdump: tcpdump vnet0 => multicast packets are visible tcpdump vlanbr8 => multicast packets are visible tcpdump em1.8 => no multicast packets visible vlanbr8 is the bridge, vnet0 the interface of the guest and em1.8 the physical interface for vlan 8. I compared the settings in /sys/class/net/vlanbr8/bridge/multicast_* with a system where multicast works fine and see no differences. brctl showstp also shows "mc router" to be 1 for both interfaces and the bridge. All settings in /proc/sys/net/bridge/* are 0. Any ideas why the bridge doesn't seem to forward multicast packets? iperf with unicast udp also works fine so it's just multicast that is the problem. Regards, Dennis

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[libvirt-users] problem when using qemu 2.0.0 + libvirt 1.2.6
by weiwei li 31 Jul '14

31 Jul '14

Hi I got a problem when using qemu 2.0.0 + libvirt 1.2.6 . It just can not define a kvm vm successfully , errors like this : # virsh define 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: Failed to define domain from 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: unknown OS type hvm After several tries, i found that Qemu2.0 /qemu-kvm1.2+ libvirt1.0.2 and lower version is ok Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and higher version is failed I have checked system as bellows: 1 kvm,kvm_intel modules are loaded(centos 6.2 /kernel 2.6.32) 2 bios is ok for hvm 3 qemu is installed and emulator path in xml config file is correct 4 I also tried to install glusterfs-devel-3.2.7-1.el6.x86_64 and rebuild qemu , no use. 5 virsh capabilities can not get guest capabilities in the failure scenario so ,why Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and above version could not work? thanks, weiwei

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[libvirt-users] missing libvirt-sock and libvirt-bin after compile libvirt 1.2.6
by Yuanzhen Gu 30 Jul '14

30 Jul '14

Good morning there, I compiled and installed libvirt latest version 1.2.6, previously I have apt-get install libvirt-bin, which should be virsh --version: 0.9.8. after apt-get purge libvirt-bin, I compile the libvirt 1.2.6 and installed it, when configure, I did: ./configure --prefix=/usr --localstatedir=/var --sysconfdir=/etc --with-esx=yes I have compiled qemu and installed too, and make a symbolic link to /usr/bin/qemu-system-x86_64 but my question is even I launch a vm in qemu, $virsh list showed nothing, further more, 1) if I use virtual machine manager, it get connection failiure, due to socket to '/var/run/libvirt/libvirt-sock'; No such file of dirctory. 2). there is missing libvirt-bin under /etc/init.d/, after compile and installed libvirt 1.2.6 3). I tried to start libvirtd daemon, sudo /usr/sbin/libvirtd/start shows "/usr/sbin/libvirtd: unexpected, non-option, command line arguments" 4). I've checked /var/log/libvirt/libvirtd.log which shows cannot find suitable emulator for x86_64 I've stuck here for whole afternoon yesterday, any help or suggestion is highly appreciated !! thanks a lot in advance ! Best, Yuanzhen Best, Yuanzhen Best, Yuanzhen

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[libvirt-users] VM not booting with physical hardware attached
by Pierre Schweitzer 30 Jul '14

30 Jul '14

Dear all, I'm looking for a bit of help with a problematic VM. We have an hypervisor which has 4 eth ports. 3 are already used, and I wanted to pass the 4th one directly to a VM (which is fully working without it). So, I modified the XML accordingly (which matches our hardware), adding: <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x03' slot='0x00' function='0x3'/> </source> </hostdev> I also activated Intel IOMMU in Linux (and rebooted). Then, I issued a virsh start <domain>. libvirt is able to fire the VM, but then the OS inside doesn't boot at all. I tried to go deeper into debugging and it seems that the VM cannot pass SeaBIOS anymore. It gets stuck in seabios, it seems. No "Booting" sentence displayed, only version of SeaBIOS, when I watch VNC ouput. I tried to use <bios useserial='yes'/> with a console to the VM. Nothing is displayed on the console. Here are the specs of the machine: -> Ubuntu 12.04LTS up to date -> libvirt 0.9.8-2ubuntu17.19 -> kvm 1.0+noroms-0ubuntu14.15 -> seabios 0.6.2-0ubuntu2.1 The ethernet card I try to attach is: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe Its PCI ID being: 14e4:1657 What are the possibilities to debug this issue? What are the possibilities to fix it as well? Thanks to everyone helping! With my best regards, -- Pierre Schweitzer <pierre(a)reactos.org> System & Network Administrator Senior Kernel Developer ReactOS Deutschland e.V.

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[libvirt-users] lxc arp doesn't work at start for several seconds
by Jonathan Rudenberg 29 Jul '14

29 Jul '14

I’m running into an issue with libvirt-lxc networking. I have an init program that configures the eth0 interface with an IP and gateway when the container starts. I noticed that programs running in the container encountered “no route to host” errors and looked into it further. What I found is that ARP packets are not making it onto the gateway during the first few seconds of the container’s life. I have created a repro case that demonstrates this issue: https://github.com/titanous/libvirt-arp-bug All it does is configure eth0 and then ARPs the bridge IP. There are no ARP responses for ~4s and then everything starts working. The linked repo also contains pcap files from the veth and the bridge showing that the ARP packets are sent over the veth but don’t show up on the bridge. I’ve tested and run into this issue 100% of the time on Ubuntu 14.04 with libvirt 1.2.2 and Linux 3.13.0-32 as well as Fedora 20 with libvirt 1.1.3.5 and Linux 3.15.6-200. Any help would be appreciated, and I’m happy to provide more details if they would be useful. Thanks, Jonathan

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[libvirt-users] Running domain-update memory not working
by usha basavaraju 29 Jul '14

29 Jul '14

>>> vm=co.lookupByName('test1') >>> vm.info() [1, 524288L, 524288L, 1, 20400000000L] >>> vm.setMemoryFlags(509952,1) # Live memory 0 >>> vm.info() [1, 524288L, 524288L, 1, 21430000000L] >>> vm.setMemoryFlags(509952,0) --- ## current memory 0 >>> vm.info() [1, 524288L, 524288L, 1, 21430000000L] >>> vm.XMLDesc() Not updating .. but api call not throwing any error.. What is the correct procedure for updating

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[libvirt-users] [libivrt-user]problem when using qemu 2.0.0 + libvirt 1.2.6
by weiwei li 29 Jul '14

29 Jul '14

Hi I got a problem when using qemu 2.0.0 + libvirt 1.2.6 . It just can not define a kvm vm successfully , errors like this : # virsh define 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: Failed to define domain from 5ab4f49c-c99f-4dbd-9d7d-17a946b4c5a7.xml error: unknown OS type hvm after several tries, i found that Qemu2.0 /qemu-kvm1.2+ libvirt1.0.2 and lower version is ok Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and higher version is failed I have checked system as bellows: 1 kvm,kvm_intel modules are loaded(centos 6.2 /kernel 2.6.32) 2 bios is ok for hvm 3 qemu is installed and emulator path in xml config file is correct 4 I also tried to install glusterfs-devel-3.2.7-1.el6.x86_64 and rebuild qemu , no use. so ,why Qemu2.0 /qemu-kvm1.2+ libvirt1.0.3 and above version could not work? thanks, vary much liweiwei

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[libvirt-users] redirecting guest stdio to the host
by Alexander Binun 27 Jul '14

27 Jul '14

Dear Friends, I would ask you a question ; grateful in advance! I have a program running on a VM guest. Its output is valuable (for VM introspection) so I want to let the host module know about it. I prefer to redirect ' stdio" of a guest into a device at the host (a text file or my device that has the name "mydev" and the driver is written for it). I have the XML definition file for my VM in /etc/libvirt/qemu. I have added the section: <serial type="file"> <source path="/var/log/vm/vml.log"/> <target port="0"/> </serial> into the /devices section. That is I want the stdio to be streamed into the file /var/log/vm/vml.log at the host. Then I run simple textual commands at the guest (ls, pwd and so on). But I do not see /var/log/vm/vml.log created at the host. Please help me. Thanks in advance, Alexander Binun > > The command string for qemu will look like qemu -serial /dev/mydev ... But I would like to > modify the libvirt definition XML file (in /etc/libvirt/qemu). Stefan notes in his blog > (http://blog.vmsplice.net/2011/04/how-to-pass-qemu-command-line-options.html) that the options will > look like: ---------- Forwarded message ---------- Date: Wed, 28 May 2014 18:06:10 +0300 From: Eric Blake <eblake(a)redhat.com> To: Alexander Binun <binun(a)cs.bgu.ac.il> Cc: Stefan Hajnoczi <stefanha(a)gmail.com> yagel(a)cs.bgu.ac.il kahilm(a)post.bgu.ac.il qemu-devel(a)nongnu.org boaz.menuhin(a)gmail.com Paolo Bonzini <pbonzini(a)redhat.com> markbl(a)post.bgu.ac.il Subject: Re: excuse me for incorrect question... On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt-users] Problem about Disk Dize of Destination and Source File after Do Blockcopy
by shyu 27 Jul '14

27 Jul '14

Hi There, There is a case I met about the destination file's disk size after do blockcopy Details as below: Env: # rpm -q libvirt qemu-kvm-rhev libvirt-1.1.1-29.el7.x86_64 qemu-kvm-rhev-1.5.3-60.el7ev_0.2.x86_64 1. Check source file # qemu-img info /var/lib/libvirt/images/rhel6.img image: /var/lib/libvirt/images/rhel6.img file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 1.2G cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # ll -lash /var/lib/libvirt/images/rhel6.img 1.2G -rw-r--r--. 1 qemu qemu 1.2G Jul 22 11:04 /var/lib/libvirt/images/rhel6.img Here: Disk Size is "1.2G" 2. Do blockcopy # virsh domblklist rhel6 Target Source ------------------------------------------------ vda /var/lib/libvirt/images/rhel6.img # time virsh blockcopy rhel6 vda /var/lib/libvirt/images/copy.img --wait --verbose Block Copy: [100 %] Now in mirroring phase real 0m21.285s user 0m0.038s sys 0m0.018s 3. Check destination file's disk size # qemu-img info /var/lib/libvirt/images/copy.img image: /var/lib/libvirt/images/copy.img file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 2.0G cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # ll -lash /var/lib/libvirt/images/copy.img 2.1G -rw-------. 1 qemu qemu 1.2G Jul 22 11:10 /var/lib/libvirt/images/copy.img Here: Disk Size is "2.0G" So my question is why the "disk size" is different between source file and destination file ? (Actually, the destination always change after I try many times, sometime it is same size as source, sometimes it is lager than source.) 4. Do --pivot After --pivot, the disk size is same size as after blockcopy -- Regards shyu

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