- Users - libvirt List Archives

[libvirt-users] difference between ` virsh save ` and `virsh snapshot
by zhijun liu 13 Nov '12

13 Nov '12

what the difference between ` virsh save ` and `virsh snapshot`? are they all used for backup for vm?have any details articles to introduce vm bakcup or image bakcup with libvirt? thanks in advance. liuzhijun

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[libvirt-users] Threads per vCPU and vCPU clock
by Vinicius Gonçalves Braga 13 Nov '12

13 Nov '12

Hi, is there a way to get the number of threads per vCPU and the vCPU clock? Thanks!

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[libvirt-users] the acl mode of files created by libvirtd
by Hao.Zhang 12 Nov '12

12 Nov '12

Hi, all I use virsh save command to dump a domain, the mode is 0600, and belongs to "root", how can i change the mode? Thanks. William -- That night, I thanked God for seeing me thought the day of days and prayed I would make it through tomorrow. I also promised that if some day I could get home again, I would find a nice peaceful town and spend rest of my life in peace.

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[libvirt-users] where is libvirt-python document??
by 宣铭艺 12 Nov '12

12 Nov '12

Hi libvirt users: Who can tell me where is the fucking doc? I want to use libvirt-python in my project.But I can't found the doc. I only found "TBD" in http://libvirt.org/guide/html/Application_Development_Guide-Language_Bindin… Did I miss something? Thanks. -- 樱宝宝: http://www.xuanmingyi.com

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[libvirt-users] the acl mode of files created by libvirtd
by Hao.Zhang 11 Nov '12

11 Nov '12

Hi, all I use virsh save command to dump a domain, the mode is 0600, and belongs to "root", how can i change the mode? William -- That night, I thanked God for seeing me thought the day of days and prayed I would make it through tomorrow. I also promised that if some day I could get home again, I would find a nice peaceful town and spend rest of my life in peace.

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[libvirt-users] [LXC][Openstack] Clarifications needed on usage of libvirt-lxc for openstack
by Sujay M 11 Nov '12

11 Nov '12

Hi everyone, I've some doubts regarding the usage/working of libvirt-lxc with openstack. I'm doing a project titled "Low density virtualization for Storage cloud" 1. Can i use libvirt for lxc with Openstack swift alone (excluding nova, glance and keystone)? If no what other openstack components should i use for virtualization? (Is it necessary to install openstack nova to do virtualization with libvirt-lxc?) 2. How virtualization for storage services work ? Any good articles. 3. I want to set up a cloud storage environment with low density virtualization ie lxc. I'm using Openstack swift (Object storage) for storage services. I want to virtualize this. Few resources on how i can do this using libvirt-lxc? -- Best Regards, Sujay M Final year B.Tech Computer Engineering NITK Surathkal contact: +918971897571

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[libvirt-users] move VM disk images between storage pools on the same host
by Paul Raines 09 Nov '12

09 Nov '12

I created a new LVM type storage pool on my server and would like to move my VM disk volumes in a directory-based pool into this new pool. But I cannot figure out how that is done. I find plenty of information on how to migrate live VM images from one host to another, but not on how to just move one live from one storage pool to another on the same host. If it cannot be done live, how an I do it non-live? I guess non-live I could clone, but that would change the MAC address. Just seems that if libvirt can migrate live it should be able to move a VM between storage pools on the same host even easier. --------------------------------------------------------------- Paul Raines http://help.nmr.mgh.harvard.edu MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging 149 (2301) 13th Street Charlestown, MA 02129 USA The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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[libvirt-users] Updating an "interface" device has no effect on network filters
by Guido Winkelmann 09 Nov '12

09 Nov '12

Hi, I am trying to update the network filters on running guest machines (qemu backend) without having to restart the domain. Say I have a running domain "test" with this interface: <interface type='bridge'> <mac address='52:54:00:84:6d:6d'/> <source bridge='virbr1'/> <model type='virtio'/> <filterref filter='clean-traffic-with-v6'> <parameter name='IP' value='172.18.1.9'/> <parameter name='IPV6' value='fe80::5054:ff:fe84:6d6d'/> <parameter name='MAC' value='52:54:00:84:6d:6d'/> </filterref> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> Now I want that domain to be able to use an additional IP address for some reason, so I write a file uppdevice.xml with this content: <interface type='bridge'> <mac address='52:54:00:84:6d:6d'/> <source bridge='virbr1'/> <model type='virtio'/> <filterref filter='clean-traffic-with-v6'> <parameter name='IP' value='172.18.1.9'/> <parameter name='IP' value='172.18.1.10'/> <parameter name='IPV6' value='fe80::5054:ff:fe84:6d6d'/> <parameter name='MAC' value='52:54:00:84:6d:6d'/> </filterref> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> and run update-device test-cpu-restrict2 upddevice.xml in virsh. This appears to work without problems and produces no error messages (it prints "Device updated successfully"), except the ebtables script on the host machine does not get updated after that and consequently, the new IP address is not usable. Regards, Guido

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[libvirt-users] Failed to access console after launching LXC through libvirt
by unicell 09 Nov '12

09 Nov '12

Hi, I'm trying to manage LXC instances through OpenStack, which use libvirt as a virtualization driver layer. After launching LXC instance, I simply could not attach to the console. virsh # list Id Name State ---------------------------------- 14366 instance-00000078 running virsh # console 14366 Connected to domain instance-00000078 Escape character is ^] And it keeps stuck here. Initially I thought it could be a cgroup device config issue, and tried to "echo ‘c 5:1 rwm' >/cgroup/devices/libvirt/lxc/instance-00000078/devices.allow“, to add /dev/console access right to the container. But it does not work, console stilll not working. Before the cgroup tweaking, devices.list are as follows [root@localhost libvirt]# cat /cgroup/devices/libvirt/lxc/instance-0000007a/devices.list c 1:3 rwm c 1:5 rwm c 1:7 rwm c 1:8 rwm c 1:9 rwm c 5:0 rwm c 5:2 rwm c 136:* rwm I'm not quite sure what kind of issue could possibly cause this console access issue. Cause I'm now using two different guest OS templates on two different host OSes. Following are some symptoms I observed. * (g) for container guest OS * (h) for host OS * NOTE: Ubuntu guest os are generated by lxc-create -t ubuntu, which is an Ubuntu 12.04 based lxc template. CentOS guest os are handcrafted by myself, taking reference of http://wiki.1tux.org/wiki/Lxc/Installation/Guest/Centos/6 1. Ubuntu (g) launched by lxc-start on Ubuntu 12.04 host, console works 2. Ubuntu (g) launched by OpenStack / libvirt on Ubuntu 12.04 host, console works 3. Ubuntu (g) launched by OpenStack / libvirt on CentOS 6.3 host, console NOT works 4. CentOS (g) launched by lxc-start on Ubuntu 12.04 host, console works 5. CentOS (g) launched by OpenStack / libvirt on Ubuntu12.04 host, console NOT works 6. CentOS (g) launched by OpenStack / libvirt on CentOS 6.3 host, console NOT works So somehow I feel it could be something related to LXC template rootfs, but Host OS do make a difference (2 vs. 3). lxc-start / libvirt also makes a difference (4 vs. 5), but that might be caused by cgroup setting. Could someone shed me some clues to further digging this issue? Thanks! -- Qiu Yu

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[libvirt-users] A warning about "async message processing ."
by xuanmao_001 09 Nov '12

09 Nov '12

Hi, all: when I used virsh connect host like "virsh connect qemu+tcp://root@ip_address/system", I had a warning message about "warning: virNetClientIncomingEvent: 1660 : Something went wrong during async message processing" But I can even operated. Is there a reason can cause the warning? thanks. xuanmao_001

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