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[libvirt-users] pinVcpu not working
by Peeyush Gupta 27 Jul '13

27 Jul '13

Hi all, I am working with libvirt and I am trying to set cpu affinity. Now I can always use virsh vcpupin <domain_name> <vcpu> <pcpu> to pin vcpus to pcpus. I want to do it using Python API. Now, there is function pinVcpu which is supposed to do that. But this is not working. For example I gave dom.pinVcpu(0,1) but still my vcpu affinity is for all the pcpus. The function returns 0 (success). Any idea what am I doing wrong? Thanks. ~Peeyush Gupta

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[libvirt-users] dual head with virt-manager, kvm, debian
by Thomas Koch 26 Jul '13

26 Jul '13

Hi, I try to run a debian testing guest inside a debian stable host and would like to use both physical displays to show virtual displays of my guest. Is this possible? I tried setting the heads attribute in the domain xml as described here: https://bugzilla.redhat.com/show_bug.cgi?id=885806#c1 I've tried virt-managers internal viewer, virt-viewer and spicy without any indication of a second display. Regards, Thomas Koch

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[libvirt-users] How to trigger a script in a guest after resume? (aka guest system clock incorrect after host reboot with suspended guest)
by Nils Toedtmann 25 Jul '13

25 Jul '13

Hi Is there a way i can trigger a script within a libvirt guest immediately after resume? E.g. i don't see any log message that indicates to a guest that it had been paused and was just woken up. The problem that i am trying to solve is that when i reboot the host (pausing all guests), the guests' system clocks are a few minutes late after resume. The guests RTC (current_clocksource = kvm-clock) are correct though, so a "hwclock --hctosys" fixed the offset. I only need to find out how to call hwclock right after resume! Right now i call hwclock every few minutes, but i'd like to shorten the window of wrong time. OTOH i'd like to avoid installing ntpd into all guests, given their perfectly fine RTCs. On the host i am using CentOS 6.4 with all patches and the packaged libvirt-0.10.2 and qemu-kvm-0.12.1.2. All guests are Ubuntu 12.04. /nils.

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[libvirt-users] API to set cpuset.cpu_exclusive flag
by Peeyush Gupta 24 Jul '13

24 Jul '13

Hi all, I have been trying to set cpu_exclusive flag. Now I can do it using "echo". I want to know is there any other way (an API) to set this flag? Is it possible to set this flag using API? Thanks. ~Peeyush Gupta

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[libvirt-users] How to monitor a lxc container started by libvirt_lxc from inside ?
by hzguanqiang 24 Jul '13

24 Jul '13

Hi Guys, When I created a lxc container by libvirt, I logged into the lxc container and noticed that info under /proc/ dir did not match the lxc container resource. Is the /proc dir in lxc container just showing the same thing as the lxc host? If I want to monitor the realtime resource usage inside the lxc container, What should I do? -------------- Best regards! GuanQiang 2013-07-23

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[libvirt-users] Is there any document about the feauture and usage of lxc supported by libvirt?
by hzguanqiang 24 Jul '13

24 Jul '13

Hi Guys, Recently, I'm doing some tests on openstack with lxc virtualization supported by libvirt. I need some recently new documents about libvirt lxc. Anything related is just ok. Thanks! -------------- Best regards! GuanQiang 2013-07-23

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[libvirt-users] Resize errors with virt-resize/vgchange
by Alex 23 Jul '13

23 Jul '13

Hi, I have an fc18 system and trying to resize an LVM partition with an ext4 filesystem and receiving the following message from virt-resize: # virt-resize -d --expand /dev/sda1 --LV-expand /dev/mapper/prop-home prop-1.img prop-expand.img command line: virt-resize -d --expand /dev/sda1 --LV-expand /dev/mapper/prop-home prop-1.img prop-expand.img Examining prop-1.img ... libguestfs: trace: add_drive "prop-1.img" "readonly:true" libguestfs: trace: add_drive = 0 libguestfs: trace: add_drive "prop-expand.img" "readonly:false" libguestfs: trace: add_drive = 0 libguestfs: trace: launch libguestfs: trace: get_tmpdir libguestfs: trace: get_tmpdir = "/tmp" libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" libguestfs: trace: disk_format "/var/lib/libvirt/images/prop-expand.img" libguestfs: trace: disk_format = "raw" libguestfs: trace: get_cachedir libguestfs: trace: get_cachedir = "/var/tmp" [...] 100% --:-- libguestfs: trace: launch = 0 libguestfs: trace: lvm_set_filter "/dev/sda" libguestfs: trace: lvm_set_filter = -1 (error) Fatal error: exception Guestfs.Error("lvm_set_filter: vgchange: Couldn't find device with uuid zouQ8X-qxqJ-mp6p-pzg3-mi2i-K9YM-A763Kc. Refusing activation of partial LV home. Use --partial to override. Refusing activation of partial LV swap. Use --partial to override. R libguestfs: trace: close libguestfs: trace: internal_autosync libguestfs: trace: internal_autosync = 0 I don't understand this error message. I also see that vgchange doesn't even have a 'partial' option, so I'm not sure how to troubleshoot it. Here is the filesystem layout for this system: # df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 7.9G 0 7.9G 0% /dev tmpfs 7.9G 0 7.9G 0% /dev/shm tmpfs 7.9G 3.9M 7.9G 1% /run tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup /dev/mapper/prop-root 15G 7.4G 6.3G 55% / tmpfs 7.9G 0 7.9G 0% /tmp /dev/mapper/prop-boot 477M 95M 358M 21% /boot /dev/mapper/prop-home 222G 212G 9.9G 96% /home The image is the 222G /home partition only. The other partitions are on another image. Any ideas how to troubleshoot this would be greatly appreciated. Thanks, Alex

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[libvirt-users] Libvirt-lxc and systemd question
by Matt Hicks 23 Jul '13

23 Jul '13

Warning - I'm fairly new to libvirt, lxc and systemd so there is a good chance I'm doing something terribly wrong here. However, instead of continuing to struggle, I figured I would mail the list for some advice. What I'm trying to accomplish is a libvirt-lxc, systemd-based container running on my system (Fedora 19). I've read that sharing the underlying OS filesystem with the containers doesn't work, so I've installed a minimal Fedora 19 install in /srv/mycontainer. Everything seems to work okay but what I'm struggling with is how to setup the initial accounts. I've tried to attach to the container using 'nsenter' (entering all the namespaces) but it doesn't appear that the bind mounts are in place. For example, I see the /etc/passwd for my host OS, not the container. Is there a better way to setup the initial accounts on the container? Here is what I have installed: $ rpm -qa | grep lxc libvirt-daemon-driver-lxc-1.0.5.2-1.fc19.x86_64 libvirt-daemon-lxc-1.0.5.2-1.fc19.x86_64 $ rpm -qa | grep systemd systemd-libs-204-9.fc19.x86_64 systemd-python-204-9.fc19.x86_64 systemd-sysv-204-9.fc19.x86_64 systemd-libs-204-9.fc19.i686 systemd-204-9.fc19.x86_64 Here is the scenario I'm trying to go through: $ export LIBVIRT_DEFAULT_URI=lxc:/// $ getenforce Enforcing $ sudo yum -y --releasever=19 --nogpg --installroot=/srv/mycontainer --disablerepo='*' --enablerepo=fedora install systemd passwd yum fedora-release vim-minimal ... lots of output $ ls /srv/mycontainer/ bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var $ cat test2.xml <domain type='lxc'> <name>test2</name> <memory>102400</memory> <os> <type arch='x86_64'>exe</type> <init>/bin/systemd</init> </os> <devices> <console type='pty'/> <filesystem type='mount'> <source dir='/srv/mycontainer'/> <target dir='/'/> </filesystem> </devices> </domain> $ virsh define test2.xml Domain test2 defined from test2.xml $ virsh start test2 Domain test2 started # Attach to container to set account passwords $ sudo nsenter -m -u -i -n -p -t `pgrep -f test2` [sudo] password for mhicks: [root@localhost /]# diff -q /srv/mycontainer/etc/passwd /etc/passwd Files /srv/mycontainer/etc/passwd and /etc/passwd differ Any ideas? -Matt

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[libvirt-users] Clipboard
by Dean Hunter 22 Jul '13

22 Jul '13

I am unable to cut and paste between a Fedora 19 host and a Fedora 19 guest. Am I doing something wrong or is this a known problem that I have not been able to find?

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[libvirt-users] Any API in Java Binding for retrieving the actual Memory and CPU usage of a domain?
by V Plus 22 Jul '13

22 Jul '13

I tried some like 'domain.getInfo().memory;', but it is not the actual usage..

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