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[libvirt-users] snapshot-current vs snapshot-revert
by bitozoid 08 May '14

08 May '14

If I want to go back to a snapshot, what is the difference between snapshot-current and snapshot-revert? What happens to disk sectors of the current state when reverting to another snapshot? I'm using qemu qcow2.

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[libvirt-users] LibvirtError: Operation not supported : JSON monitor is required
by xeon_feng 07 May '14

07 May '14

Hi Thanks for chenhanxiao(a)cn.fujitsu.com help , I have resole the problem (libvirt 1.2.4 and virt-manager 0.9.0 are not incompatible)..but when I created VM by virt-manager ,it reported : unable to complete install: 'Opertation not supported: JSON monitor is required.' Traceback(most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py",line 44, in cb_wrapper callback(asyncjob, *args, **kwargs) ...... LibvirtError: Operation not supported : JSON monitor is required. what is wrong ? Please help me....... Tanks a lot .... Xeon.Feng last problem: libvirt 1.2.4 and virt-manager 0.9.0 are not incompatible """""""""" Hello everyone I encountered a problem when I completed the update of libvirt from 0.10 to 1.2.4 . The problem was that virt-manager(version 0.9.0) could not start and reported error : "ImportError: /usr/lib64/libvirt.so.0: version 'LIBVIRT_PRIVIATE_0.10.2' not found (required by /usr/lib64/python2.6/site-packages/libvirtmod.so)". I found the libvirt.so.0 link file just in the /usr/lib64/ directory , but it was linking to libvirt.so.0.1002.4 .not to the libvirt.so.0.10.2 I made libvirt.so.0 to link to libvirt.so.0.10.2 and restarted virt-manager , virt-manager started normally then restarted libvirtd failure, reporting error:l “ibvirtd: /usr/lib64/libvirt.so.0: version 'LIBVIRT_1.2.3' not found (require by libvirtd) .....” I made libvirt.so.0 to link to libvirt.so.0.1002.4 and restart libvirtd , libvirtd started normally again. Please help me to resolve the problem and give me some advise.... Thanks a lot.. Xeon.Feng """""""

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[libvirt-users] Can I assign a dedicated NIC to a container?
by WANG Cheng D 07 May '14

07 May '14

Dear all, There are two containers hosted by my host machine. And the host machine has two same 1G NICs. I want to assign a dedicated NIC to one container. The host and the other container share the second NIC. How can I achieve this? Any comments will be highly appreciated. Cheng

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[libvirt-users] Libvirtd failed to start inside container: libvirt-qemu.so.0: cannot open shared object file: Permission denied
by Konstantin Danilov 07 May '14

07 May '14

Hi all. I run into trouble, while try to start libvirtd inside docker container (actually it is LXC container). During startup libvirtd can't load shared library libvirt-qemu.so.0 (and strace results looks very odd). * I run libvirtd as root. * libvirt-bin - 0.9.8-2ubuntu17 * selinux/apparmor both disabled. * No other security extension are used. * No sticky bits are set. * Required library are present in appropriate folder and have all required permissions. * I also successfully load it to other process (python). * No file locks are holds. * OS ubuntu linux 12.04 x64 ___running inside LXC container__(docker). Container is privileged (I can run vm using kvm in it) * On host system libvirtd starts ok, but stopped now # uname -a Linux 27119997ee44 3.11.0-19-generic #33-Ubuntu SMP Tue Mar 11 18:48:34 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux # dpkg -l | grep libvirt ii libvirt-bin 0.9.8-2ubuntu17 programs for the libvirt library ii libvirt0 0.9.8-2ubuntu17 library for interfacing with different virtualization systems ii python-libvirt 0.9.8-2ubuntu17 libvirt Python bindings # libvirtd libvirtd: error while loading shared libraries: libvirt-qemu.so.0: cannot open shared object file: Permission denied # whoami root # ls -l `which libvirtd` -rwxr-xr-x 1 root root 1211712 Apr 16 2012 /usr/sbin/libvirtd # ldd `which libvirtd` ...... libvirt-qemu.so.0 => /usr/lib/libvirt-qemu.so.0 (0x00007fd6ed29c000)Environment: .... # ls -l /usr/lib/libvirt-qemu.so.0 -rwxr-xr-x 1 root root 6144 May 6 21:46 /usr/lib/libvirt-qemu.so.0 # strace libvirtd execve("/usr/sbin/libvirtd", ["libvirtd"], [/* 19 vars */]) = 0 brk(0) = 0x1d74000 .... (~30 lines) open("/usr/lib/libvirt-qemu.so.0", O_RDONLY|O_CLOEXEC) = -1 EACCES (Permission denied) <<<< !!!! stat("/usr/lib", 0x7fffbd127840) = -1 EACCES (Permission denied)-- <<<< !!!! Before try to load /usr/lib/libvirt-qemu.so.0 libvirtd make only stat, open, access and brk system calls (no change user or other security related calls) # stat /usr/lib File: `/usr/lib' Size: 8192 Blocks: 24 IO Block: 4096 directory Device: 53h/83d Inode: 70 Links: 68 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2014-04-02 12:38:18.171617082 +0000 Modify: 2014-05-06 21:46:39.450449491 +0000 Change: 2014-05-06 21:46:39.450449491 +0000 Birth: - # selinuxenabled ; echo $? 1 # kvm-ok INFO: /dev/kvm exists KVM acceleration can be used on host system - $ docker -v Docker version 0.9.1, build 3600720 Thanks ---- Kostiantyn Danilov aka koder.ua Principal software engineer, Mirantis skype:koder.ua http://koder-ua.blogspot.com/ http://mirantis.com

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[libvirt-users] Virsh Attach Volume Fails
by Vilobh Meshram 07 May '14

07 May '14

Hi, When trying to attach a created volume to an instance using the virsh utility I am running into this error :- [] $ sudo virsh attach-device instance-00000015 disk.xml error: Failed to attach device from disk.xml error: internal error unable to execute QEMU command '__com.redhat_drive_add': Device 'drive-virtio-disk21' could not be initialized For experimental purpose I have libvirt 0.10.2 and QEMU 0.12.1. The volume to be attached is on a remote storage. Any idea what I might be missing ? Thanks, Vilobh

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[libvirt-users] libvirt 1.2.4 and virt-manager 0.9.0 are not incompatible
by xeon_feng 06 May '14

06 May '14

Hello everyone I encountered a problem when I completed the update of libvirt from 0.10 to 1.2.4 . The problem was that virt-manager(version 0.9.0) could not start and reported error : "ImportError: /usr/lib64/libvirt.so.0: version 'LIBVIRT_PRIVIATE_0.10.2' not found (required by /usr/lib64/python2.6/site-packages/libvirtmod.so)". I found the libvirt.so.0 link file just in the /usr/lib64/ directory , but it was linking to libvirt.so.0.1002.4 .not to the libvirt.so.0.10.2 I made libvirt.so.0 to link to libvirt.so.0.10.2 and restarted virt-manager , virt-manager started normally then restarted libvirtd failure, reporting error:l “ibvirtd: /usr/lib64/libvirt.so.0: version 'LIBVIRT_1.2.3' not found (require by libvirtd) .....” I made libvirt.so.0 to link to libvirt.so.0.1002.4 and restart libvirtd , libvirtd started normally again. Please help me to resolve the problem and give me some advise.... Thanks a lot.. Xeon.Feng

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[libvirt-users] Virtualbox HOWTO?
by Dr. Boris Neubert 04 May '14

04 May '14

Hi, I have the latest libvirt from the git repo successfully compiled and up and running under CentOS 6.5. I can connect to the daemon (started with /usr/local/sbin/libvirtd -d --listen) both locally and remotely. I cannot see my virtualbox virtual machines. They run as the user "virtualbox". I connect with virsh -c vbox+tcp://virtualbox@vmserver/session and all list --all gets me is Id Name State ---------------------------------------------------- I probably miss something elementary, especially because I am not asked for a password for the virtualbox user and did not configure any machines beforehand. But I did not find how do to the trick in the documentation. Anybody out there with a working Virtualbox setup can help me out? Thanks and kind regards, Boris

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[libvirt-users] newbee questions
by John Smith 04 May '14

04 May '14

Hi, Im very new to virtualization on Linux, wanting to kick the tires some, and am wondering where best to go next. Right now, ive done the 'all in one install' of ovirt 3.4 on a single fedora 19 machine. Its a desktop with a wifi network interface, and im trying to set up the kvm hypervisor in combination with macvtap. Any pointers to docs on what best to do next is appreciated. Im currently trying to make sense of this: http://www.ovirt.org/Quick_Start_Guide Also, as far as I can tell, there seems to be an issue with the detection of my wireless wifi network interface 'wlp2s0' as it doesnt seem to show up anywhere in the interface. I can attach the 'ovirtmgmt' network to my standard wired ethernet interface 'p2p2', but that device is not in use on the machine and it is disconnected from the network. Reading about linux virt and issues with bridging with wifi NIC's on the web made me, perhaps incorrectly here, assume that a wifi nic might be an issue, so thats where the idea to use macvtap came from. Manual setup of macvtap seems to work, as i can do this without issues on a root prompt on the same machine: ip link add link wlp2s0 name macvtap0 type macvtap ip link set macvtap0 address 1a:46:0b:ca:bc:7b up ip link show macvtap0 But the wifi interface 'wlp2s0' does not seem to show up in the ovirt web gui interface. Im sorry if I sound confusing here, but that may be just because im really still confused about ovirt. ;) So any pointers on what to read up on or do next is appreciated, Thanks, Regards, John Smith.

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[libvirt-users] Corrupt image?
by mattias 02 May '14

02 May '14

I took a gzipped qcow2 image And do a gunzip on it But what? [root@mjw vm]# fdisk w.qcow2 -l Disk w.qcow2: 0 MB, 0 bytes 255 heads, 63 sectors/track, 0 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 [root@mjw vm]# The disc should not be 0 mb!!! The disc worked before i gzipped it

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[libvirt-users] virsh update-device: need to clear network filters
by Oleg Bondarev 01 May '14

01 May '14

Hi, Can anyone please help with the following: I have a running instance with interface <interface type='bridge'> <mac address='fa:16:3e:ba:a4:67'/> <source bridge='br100/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='nova-instance-instance-00000001-fa163ebaa467'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> what I need is to clear network interface on the instance. I tried virsh update-device with following xml: <interface type='bridge'> <mac address='fa:16:3e:ba:a4:67'/> <source bridge='br100/> <model type='virtio'/> </interface> but this results in the following error: $ sudo virsh update-device 13 xml.xml --persistent --live --config error: Failed to update device from xml.xml error: End of file while reading data: Input/output error error: Failed to reconnect to the hypervisor and libvirt is restarted. Is it possible to clear nw filter at all? Thanks, Oleg

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