August 2014 - Users - libvirt List Archives

[libvirt-users] bridge / ubuntu / no arp reply
by François Chenais 15 Oct '26

15 Oct '26

Hello I'm trying to setup a bridged guest on an ubuntu 13.10 but it doesn't work. (Everything is ok with NAT) Network sniffing shows that arp replies don't come back to the guest. Test 1 ------ Guest : ping host_bridge_ip (ok) Test 2 ------ Guest: ping other_lan_host (KO) other_lan_host - receives arp who-is request - sends arp reply - arp -a shows the guest macaddr => Guest doesn't receive reply Test 3 ------ other_lan_host ping the Guest (KO) - arp -a shows "incomplete" addr - Guest receives nothing On Host ------- network tcpdump on bridge or vnet interfaces shows request but no reply ... Thanks in advance for help or ideas François

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[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 21 Nov '14

21 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] Default lib/include dirs location in OS X
by Radek Simko 05 Sep '14

05 Sep '14

Hi, I have installed libvirt via Homebrew = compiled from source <https://github.com/Homebrew/homebrew/blob/master/Library/Formula/libvirt.rb> . Then I wanted to install *ruby-libvirt* gem install ruby-libvirt and end up with this error: /usr/local/Cellar/ruby/2.1.2_3/bin/ruby extconf.rb *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/Cellar/ruby/2.1.2_3/bin/ruby --with-libvirt-include --without-libvirt-include --with-libvirt-lib --without-libvirt-lib --with-libvirt-config --without-libvirt-config --with-pkg-config --without-pkg-config extconf.rb:73:in `<main>': libvirt library not found in default locations (RuntimeError) extconf failed, exit code 1 so then I passed the locations of *include* & *lib* directories as the configuration options: gem install ruby-libvirt -- --with-libvirt-include=/usr/local/Cellar/libvirt/1.2.7/include --with-libvirt-lib=/usr/local/Cellar/libvirt/1.2.7/lib which *worked*, but it's not very clean and effective solution, especially if you have *ruby-libvirt* as a requirement in your Gemfile and you need to install it via Bundler. I reckon that a possible solution would be to change Homebrew formula, so that it either installs or symlinks both dirs into locations where *ruby-libvirt* will look for it, but *what's the default location actually*? -- *Radek Simko*

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[libvirt-users] Unable to find security driver for label selinux
by Qiang Guan 05 Sep '14

05 Sep '14

Hi experts, I want to have a test on security driver for libvirt lxc on my debian system. What I do is as the following steps: 1) download the source code from git://libvirt.org/libvirt.git 2) compile and install with the source code as following: ./autogen.sh --system ./configure --with-selinux=yes --with-secdriver-selinux=yes make -j8 & make install root@debian:~/github/libvirt.git/tools# ./virsh --version=long Virsh command line tool of libvirt 1.2.8 See web site at http://libvirt.org/ Compiled with support for: Hypervisors: QEMU/KVM LXC UML OpenVZ VMWare VirtualBox Test Networking: Remote Network Bridging Interface udev Nwfilter VirtualPort Storage: Dir Filesystem SCSI Multipath LVM Miscellaneous: Daemon Nodedev SELinux Secrets Debug Modular 3) then I define a lxc vm with the seclabel : root@debian:~/images# vir dumpxml lxc <domain type='lxc'> <name>lxc</name> <uuid>b1b787a1-d20e-48bd-938b-16ba61d22405</uuid> <memory unit='KiB'>419404</memory> <currentMemory unit='KiB'>419404</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> <cmdline>console=tty0 console=ttyS0</cmdline> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/local/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/tmp/rootfs'/> <target dir='/'/> </filesystem> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> <seclabel type='dynamic' relabel='yes'/> </domain 4) When I start the vm, It output an error: root@debian:~/images# vir start lxc error: Failed to start domain lxc error: unsupported configuration: Unable to find security driver for label selinux What's the problem? Really appreciate for any help. -- ------------ Jackie Best Regards

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[libvirt-users] virtio-serial port that listens tcp socket on host
by Vasiliy Tolstov 05 Sep '14

05 Sep '14

Hello. Is that possible to create virtio-serial port that on host listens tcp socket and how to avoid duplicate listened ports in case of migration? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] DHCP and Secure Containers
by Gene Czarcinski 29 Aug '14

29 Aug '14

I have been "playing with" Secure Containers running a lighttpd server and have it up and running. I used Adam's process (https://www.happyassassin.net/2014/07/23/bridged-networking-for-libvirt-wit…) for getting a bridge defined when also running NetworkManager. I then created a virtual network definition: > <network> > <name>net18</name> > <uuid>8d19a05b-ac85-4e2a-88bc-5ca4cbb29a33</uuid> > <forward mode='bridge'/> > <bridge name='br0'/> > </network> This works fine when I use static addresses such as: > -N source=net18,address=192.168.18.94/24,route=192.168.18.255%192.168.18.1 but does not work when I specify using dhcp: > -N source=net18,dhcp I have reported this as a bug: https://bugzilla.redhat.com/show_bug.cgi?id=1133686 Since there has not been much of a reaction to the BZ report, I decided to take a look at the source code (it sure would have been nice if the SRPMS were there in the F20 fedora-virt-preview but I get the package from development/21). I see that libvirt-sandbox-init-common.c has the code for starting dhcp and also has main() along with some runtime options for -v verbose and -d debug. OK, how do I go about turning verbose and/or debug on? Any suggestions on how to debug and get dhcp to work? Is this the correct mailing list? Gene

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[libvirt-users] CPU flag masking not working with xen
by Nathan March 28 Aug '14

28 Aug '14

Hi, Trying to get CPU masking working with xen and it's just stubbornly refusing to work. Spawning a VM with xm directly works fine, but every time I try with libvirt it just ends up having all the flags of the host. Looking at the xen logs, libvirt doesn't appear to be passing any cpu options to xen at all. Running centos 6.5 with the xen 4 packages (4.2.4), but I've also tried building the latest libvirt 1.2.8-r1 from source and still the same thing. I am seeing these errors out of libvirt, but not sure if they're related: 2014-08-28 17:39:02.815+0000: 22674: error : xenHypervisorDoV2Sys:1013 : Unable to issue hypervisor ioctl 3166208: Permission denied If I spawn a VM directly with XM and use libvirt to dumpxml it, or try the domxml-from-native then libvirt just drops all the CPU info. I'm pretty sure I've got the xml correct though as it passes validation with virt-xml-validate: http://pastebin.com/aBUQckhc I've tried everything I can think of and just not getting anywhere at all, can anyone point me into the right direction for what the issue might be? Thanks! - Nathan

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[libvirt-users] Hook for qemu: traffic shaping
by Romain Hardouin 28 Aug '14

28 Aug '14

Hi all, If some people use generic ethernet interface and want to set traffic shaping, I made a libvirt hook for qemu: https://github.com/rhardouin/libvirt_hooks Of course, this is a workaround. I recently started to work on a fix but in the meantime this hook will do the trick and maybe it could help someone else. Feel free to fork it if you think about any improvements. Cheers, Romain IRC: romainh

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[libvirt-users] Cputune causing VM to show usage as hardware interrupts
by Tyler Wilson 27 Aug '14

27 Aug '14

Hey All, What is the correct method for using cputune to use a percentage of a host core? From testing I currently have period set to 10,000 and quota set to 3,500. This gets me 35% of a used core on the host (36 3.4 2:42.20 qemu-system-x86) however when running stress inside the VM I am showing this usage in top;w %Cpu(s): 0.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 35.2 hi, 0.0 si, 64.8 st Is this the intended result or are my numbers incorrect for this goal? I am running libvirtd 1.2.2. Thanks for the assist.

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[libvirt-users] Progressively worsening unresponsiveness
by Michael Warnecke 27 Aug '14

27 Aug '14

Hello all, I'm new to the list, and hoping someone can point me in the right direction. I've got an Ubuntu 14 dom0 with, what I think, are excellent specs. 12 cores, hyperthreaded, VT, 64GB RAM, gobs of disk, etc... all to run 8 virtual machines (at the moment). My problem is each of the guests - Windows, Ubuntu, FreeBSD, starts out working fine. After several minutes, the guest becomes unresponsive for a moment, and comes back. As time goes on, this happens more, and more frequently, and longer and longer until after about a day the guest is completely useless, and needs a shutdown, and start. The dom0 is NEVER unresponsive. I've tried to track this down through every means I have available, and have come up empty handed. Here is some of what I've done so far, please let me know what other information would help to debug this: 1. I've set guest OS processor to be default, and copied from host. Neither made any noticable difference. 2. I've switched all disks and network to be VirtIO. Big improvement over IDE, but the unresponsive problem persists. 3. Linux guests have the following in dmesg: hrtimer: interrupt took 10109276 ns [sched_delayed] sched: RT throttling activated 4. I found nothing suspicious in the dom0's dmesg. 5. Unresponsiveness does not correlate with disk usage. 6. Host uses 4 disks in software RAID-5 (yes I know I'm bad, but there are reasons) using BTRFS. 7. Guest disks are all raw. Please let me know if there is some other useful information, or if you have an idea where I should look next. Thanks!

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