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[libvirt-users] How to use blockcopy in libvirt-java
by Star Guo 17 Dec '14

17 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 15 Dec '14

15 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 13 Dec '14

13 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 10 Dec '14

10 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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[libvirt-users] snapshots and qcow2
by Laszlo Hornyak 09 Dec '14

09 Dec '14

Hi, I ran into a strange behavior with libvirt snapshots. I have some vms running with thin-provisioned qcow2 disk images (libvirt 1.1.3 with fedora 20). * When I create a snapshot on the VM, the qcow file suddenly grows big, somewhat bigger than the maximum size of the disk. * When I delete the snapshot, the allocated disk space is not freed up, the qcow image remains the same size. However, if I create a new snapshot again, it will take the previous snapshot's space. This does not seem to be very well documented in qemu and the man page, manual, online documentation, wiki etc does not mention it. Is there a way to free up the space allocated for snapshots? Thank you, Laszlo -- EOF

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[libvirt-users] all.accept_redirects force disabled with libvirt
by Thomas Lau 09 Dec '14

09 Dec '14

Hi All, I was having trouble to enable all.accept_redirects due to our network structure, we have to enable it, but all libvirt installed machines contain this setting: net.ipv4.conf.all.accept_redirects = 0 I even use sysctl.conf to force to enable it, still no go, anyone know why? -- Thomas Lau Director of Infrastructure Tetrion Capital Limited Direct: +852-3976-8903 Mobile: +852-9323-9670 Address: 20/F, IFC 1, Central district, Hong Kong

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[libvirt-users] libgfapi disk locking in virtlockd not working
by Piotr Rybicki 09 Dec '14

09 Dec '14

Hello. I'm playing with libgfapi network disks, over IB and all is working fine, but not disk locking (and true rdma transport). I use virtlockd, and with fuse mount, locking works as expected. But when i converted disk definitions to libgfapi, locks are not created (but qemu starts and works fine). I used direct and indirect locking - same result : qemu working fine, no locks. my revelant xml section: <disk type='network' device='disk'> <driver name='qemu' type='raw' cache='writethrough' iothread='1'/> <source protocol='gluster' name='pool_test/gentoo-virtio-lib1-sys.img'> <host name='X.X.X.X' port='24007' transport='rdma'/> </source> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> I also tried devices <lease> but it also doesn't work: <lease> <lockspace>somearea</lockspace> <key>somekey</key> <target path='/data/nfs/lockd'/> </lease> # virsh start gentoo-virtio-lib1 błąd: Uruchomienie domeny gentoo-virtio-lib1 nie powiodło się błąd: internal error: Lockspace for path /data/nfs/lockd/somearea does not exist well, lockspace exists... # ls -al /data/nfs/lockd razem 4K drwxrwxrwx 3 root root 21 12-08 22:43 . drwxrwxrwt 7 root root 4096 12-08 14:29 .. drwxrwxrwx 2 qemu qemu 6 12-08 22:43 somearea # ls -al /data/nfs/lockd/somearea/ razem 0K drwxrwxrwx 2 qemu qemu 6 12-08 22:43 . drwxrwxrwx 3 root root 21 12-08 22:43 .. Are libgfapi based disks supported by virtlockd? Is there a bug. Am I missing something? My test system: # uname -r 3.14.24-gentoo # libvirtd -V libvirtd (libvirt) 1.2.10 # virtlockd -V virtlockd (libvirt) 1.2.10 # qemu-x86_64 -version qemu-x86_64 version 2.1.2, Copyright (c) 2003-2008 Fabrice Bellard # glusterfs -V glusterfs 3.5.20141204.7b160e3 built on Dec 8 2014 19:03:37 (normally 3.5.2, but was curious if 3.5 series nightly buld will enable true RDMA transfer, not IPOIB. - it did not). Best regards Piotr Rybicki

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