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[libvirt-users] virsh list shows no vm after downgrade
by Chengyuan Li 19 Dec '14

19 Dec '14

Hi, I was running libvirt 1.2.2 and qemu 2.0 which are from icehouse cloud archive repo on ubuntu 12.04, "virsh list --all" showed correct instances after launching several VMs, Then I just downgraded libvirt to 0.9.13 and qemu to 1.0, but kept the VMs running. However, when I run "virsh list --all" after downgrade, I can't see any VMs. Seems that the old version libvirt 0.9.13 doesn't know the instances created by libvirt 1.2.2. Does anyone know how to solve this problem? Regards,Chengyuan.

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[libvirt-users] detachFlags permissions and ownership
by Martin Polednik 18 Dec '14

18 Dec '14

Hello everyone, I would like to ask why detachFlags doesn't change the ownership/permissions of /dev/vfio/XX in order to be readable (possibly writable, is that required?). Is there any way to accomplish this without custom udev rules/scripts or is it handled only when using "managed=yes" mode for 'hostdev' type devices? Regards, mpolednik

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[libvirt-users] Again with same Cgroup issue :)
by mad Engineer 17 Dec '14

17 Dec '14

Hello All, From the last couple of days i have been spamming this mailing list with request for configuring Cgroup with libvirtd on Centos systems. I still can not find a permanent solution to limit host RAM to particular value,tried creating a separate hierarchy "mykvm" and changed in sysconfig/libvirtd after that vm's memory cgroup reflects this.But it is not obeying "memory.limit_in_bytes" set in "mykvm" group,i als specified it in cgrules.conf and restarted it.If i change that in "/cgconfig/memory/mykvm/libvirt/qemu/memory.limit_in_bytes " its working.But that is dynamic as i am not able to find a way to mention that in "cgconfig.conf". How can i make sub hierarchies follow what is set in parent cgroup? eg: if change variables in "/cgconfig/memory/mykvm" then all instances coming under "/cgconfig/memory/mykvm/libvirt/qemu/" should follow that value..How is it possible.Can you please help

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[libvirt-users] How to use blockcopy in libvirt-java
by Star Guo 16 Dec '14

16 Dec '14

Hi, ALL, I just look for the class and method to use blockcopy in libvirt-java on this page: http://libvirt.org/sources/java/javadoc/ However, I can not find out. Libvirt-java Support blockcopy ? Thanks. Best Regards, Star Guo

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[libvirt-users] C group hierarchy and libvirtd
by mad Engineer 15 Dec '14

15 Dec '14

On Centos 6.4 x64,with libvirt-0.10.2-18.el6.x86_64 i am trying to set "memory.limit_in_bytes" for all qemu process. changed "cgconfig.conf" group mygroup{ perm { admin { uid = root; gid = root; } task { uid = qemu; gid = kvm; } } memory { memory.limit_in_bytes = 61G; } } and also added "CGROUP_DAEMON=memory:/mygroup" in sysconfig/libvirtd and in cgrules.conf and then restarted services. Now i can see created virtual machines use cgroup hierarchy "/cgroup/memory/mygroup/libvirt/qemu/virtualmachine1/" instead of "/cgroup/memory/libvirt/qemu/virtualmachine1/". The issue is "memory.limit_in_bytes" set to "mygroup" is getting applied only to libvirtd process.VM are not following memory.limit_in_bytes set to "mygroup". 1. how can i set this globally so that all virtual machines follow that, i dont want to create a new group for that if libvirt supports it. 2.Is there any way i can avoid extra hierarchy and create virtual machines memory cgroup under "/cgroup/memory/kvm/" instead of "/cgroup/memory/mygroup/libvirt/qemu/" ? please help me fix this issue.I have this working on ubuntu servers where i specified "libvirt-qemu" user and VMs follow that cgroup for memory. Regards,

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[libvirt-users] Difficulty configuring Cgroups on redhat/centos
by mad Engineer 14 Dec '14

14 Dec '14

Hello All, i am trying to set "memory.limit_in_bytes" for all process created by libvirt.But i am not able to achieve this on RHEL systems in Ubuntu servers creating memory cgroup for "libvirt-qemu" user solves the issue.But in case of RHEL system i tried to create a group by editing "cgconfig.conf" and then changing cgrules.conf and restarted cgconfig and libvirtd but still virtual machines are not following what is mentioned in config,instead they follow cgroup libvirt/qemu/virtualmachine-name ,is there any way i can set global cgroup values for all process rather editing each process configuration or how can i configure libvirt to use new configuration file and use that group instead of default libvirt/qemu/ cgroup. /etc/cgconfig.conf mount { cpuset = /cgroup/cpuset; cpu = /cgroup/cpu; cpuacct = /cgroup/cpuacct; memory = /cgroup/memory; devices = /cgroup/devices; freezer = /cgroup/freezer; net_cls = /cgroup/net_cls; blkio = /cgroup/blkio; } group kvm { perm { admin { uid = root; gid = root; } task { uid = qemu; gid = kvm; } } memory { memory.limit_in_bytes = 61G; } } and this on cgrules.conf qemu memory kvm Thanks for your help

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[libvirt-users] Does libvirt support HyperV Server 2012?
by Pillai, Padmakumar 12 Dec '14

12 Dec '14

Hi, I wanted to know whether libvirt-1.2.10 supports HyperV Server 2012 and/or SCVMM Server 2012. There is a requirement for us to deploy a VHD image to the HyperV Server 2012 SP2. We are planning to do this using libvirt-1.2.10. Thanks Paddy

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[libvirt-users] How to use blockcopy in libvirt-java
by Star Guo 11 Dec '14

11 Dec '14

Hi, ALL, I just find the page on git: https://github.com/qemu/qemu/blob/master/docs/live-block-ops.txt This metion “Live block copy”, so Live Block Copy is the feature of live-block-ops. And what about the live-block-migration ? Best Regards, Star Guo 发件人: Star Guo [mailto:starg@ceph.me] 发送时间: 2014年12月10日 18:17 收件人: 'libvirt-users(a)redhat.com' 抄送: 'libvir-list(a)redhat.com' 主题: How to use blockcopy in libvirt-java Hi, ALL, I just look for the class and method to use blockcopy in libvirt-java on this page: http://libvirt.org/sources/java/javadoc/ However, I can not find out. Libvirt-java Support blockcopy ? Thanks. Best Regards, Star Guo

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[libvirt-users] virDomainSetMemoryStatsPeriod autostart
by Gleb Voronich 10 Dec '14

10 Dec '14

Hello, A collecting period should be set to get domain memory stats (virDomainSetMemoryStatsPeriod function or virsh dommemstat --period from command line). Is there a way to set this period automatically using XML config or any other way?

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[libvirt-users] Two identical hosts, different capabilities and topologies
by Davide Ferrari 09 Dec '14

09 Dec '14

Hello, I've two twin servers (Dell PowerEdge R815) dedicated to kvm+libvirt and they have the same exact CPU (AMD Opteron(TM) Processor 6272) with the same topology (2 sockets, 16 cores per socket, so a total of 32 CPUs seen by the kernel) but both virsh -r capabilities and virsh nodeinfo say that the two machines are different - but they really are not! - and this prevents live migration from one server to another (but the other way round works). Attached you will find the output of some programs, if you need more info just ask. They are both running Debian Wheezy with latest backported kvm/libvirt (libvirt-daemon 1.2.9-6~bpo70+1). A curious fact is that kvm-host-01 detects the wrong topology (1 socket, 32 cores per socket) but it displays more capabilities, so migrating from kvm-host-02 -> kvm-host-01 works but from 01 to 02 fails. Any idea? Thanks in advance

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