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[libvirt-users] Does Set Block IO tune take effect in the same session.
by vikrant verma 31 May '13

31 May '13

Hello All, I am using virDomainSetBlockIoTune() API to set the IO tune parameter for a running guest VM. I observed that after setting the value succesfully i ned to Shutdown and start the VM inorder to take the set value in effect. Is there any way with which these values come in effect in the same session of the VM without Shutting down and starting the VM. Please help regards, Vikrant

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[libvirt-users] Enable bios useserial=yes from command line
by Knightmare 31 May '13

31 May '13

Hi Guys, I'm currently learning KVM and have set up an Ubuntu 12.04.2 VM running KVM. I am using the following command to provision a VM: virt-install --connect qemu:///system --ram "$ramsize" -n "$vmname" --boot network,hd,menu=on --os-variant="$variant" --disk path=/var/lib/libvirt/images/"$vmname".qcow2,device=disk,bus=virtio,format=qcow2 --mac= --cpu host --vcpus="$numcpus" --graphics none --noautoconsole --import But cannot seem to find a way to enable bios useserial=yes without issuing a virsh edit $vmname I've tried --extraargs= but that appears to be for kernel command lines, which is not what I want to achieve here. I'm looking for a way to enable serial BIOS from the point the VM is created. The current solution I am using is to do virsh destroy $vmname ; virsh edit $vm_name ; virsh start $vm_name which is not great, but gets the job done. My versions are as follows: Ubuntu 12.04.2 x86_64 kernel 3.2.0-39-generic libvirt 0.9.8-2ubuntu17.8 qemu-kvm 1.0+noroms-0ubuntu14.8 Thanks, Robert

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[libvirt-users] Question, how to coorelate snapshot ID's to the files that they represent?
by vonNieda, Adam (USMS) 31 May '13

31 May '13

Hi folks, first post :) I'm running Redhat 6 x64 with ibvirt-0.10.2-18 and qemu-img-rhev-0.12.1.2-2.355 My question is, if I do something like the following.. [root@testbox ~]# virsh snapshot-list STIGtest Name Creation Time State ------------------------------------------------------------ 1369421485 2013-05-24 13:51:25 -0500 disk-snapshot 1369768781 2013-05-28 14:19:41 -0500 disk-snapshot 1369920434 2013-05-30 08:27:14 -0500 disk-snapshot 1369920574 2013-05-30 08:29:34 -0500 disk-snapshot 1369920859 2013-05-30 08:34:19 -0500 disk-snapshot 1369920888 2013-05-30 08:34:48 -0500 disk-snapshot 1369921298 2013-05-30 08:41:38 -0500 disk-snapshot Is there another command I can issue to get the OS snapshot file that one of those snapshot names represents? Thanks very much! -Adam -- Adam vonNieda JMIS technical support Capgemini Government Solutions JPATS Kansas City Desk 816-467-1935

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[libvirt-users] Virsh with CPU features on XML file not working!
by Antonio Colín 30 May '13

30 May '13

Hello, Does anyone have masked their CPU flags with Libvirt?? It's because I have done so with Libvirt and Virsh compare / baseline. But when I boot the DomU I see the same flags as if I hadn't declare de <cpu> tag containing the features just as is described in: http://libvirt.org/formatdomain.html#elementsCPU I posted here my XML file definition: http://pastebin.com/ze5wvSZt I would be really grateful if someone shared your domain XML definition with me or tell me the syntax. I've been struggling for hours, just you know, following the documentation available but there is no functionality for me yet. Thank you a lot! Antonio Colín.

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[libvirt-users] “Unable to connect to libvirt” (xen, xl toolstack, and virt-manager)
by Gizmo Chicken 30 May '13

30 May '13

I get “Unable to connect to libvirt” when using virt-manager in combination with the XL toolstack and Xen 4.2.1. (No problems when using virt-manager in combination with the XM toolstack.) More details of the situation can be found in a bug-report that I filed on launchpad. Please see: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1180281 Judging from the information that I provided in the above referenced bug-report (some of which is copied below), does this appear to be an actual bug? Or have I failed to configure something properly? Thanks for any help with this! Best regards, GizmoChicken P.S. Here is more of the error that I get when attempting to start virt-manager: Unable to connect to libvirt. unable to connect to 'localhost:8000': Connection refused Verify that: - A Xen host kernel was booted - The Xen service has been started Libvirt URI is: xen:/// Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1027, in _open_thread self.vmm = self._try_open() File "/usr/share/virt-manager/virtManager/connection.py", line 1009, in _try_open flags) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: unable to connect to 'localhost:8000': Connection refused And here the output from var/log/libvirt/libvirtd.log 2013-05-18 05:44:47.614+0000: 1304: info : libvirt version: 1.0.5 2013-05-18 05:44:47.614+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.615+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.617+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.618+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.618+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.619+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.635+0000: 1304: error : do_connect:103 : internal error failed to connect to xend 2013-05-18 05:44:47.636+0000: 1304: error : xenDaemonOpen_tcp:700 : unable to connect to 'localhost:8000': Connection refused 2013-05-18 05:45:13.647+0000: 1289: error : virNetSocketReadWire:1362 : Cannot recv data: Connection reset by peer

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[libvirt-users] Trouble running LXC through libvirt
by Shashank Sahni 29 May '13

29 May '13

Hi everyone, I followed the instructions here to create ubuntu lxc containers. https://help.ubuntu.com/12.04/serverguide/lxc.html#lxc-admin I then copied the rootfs to /var/lib/libvirt/images/precise and booted it as an "operating system container" through virt-manager. Here are the incidents. - It immediately showed on console "init: unable to create /dev/kmsg" but after a while it booted. - I had modified the image to allow static password for user ubuntu and I logged in. But to my surprise I wasn't able to use sudo. The error was "sudo: setuid is not set" I've tried this image on lxc and it works like a charm. But there seems to be some issue with libvirt. Some help would be greatly appreciated. -- Shashank Sahni

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[libvirt-users] Help needed regarding "virsh cpu-stats test_vm"
by Anusha Rayani 29 May '13

29 May '13

Hi, We are implementing feature called CPU separation in the platform. So, guest VMs will have dedicated cores allocated using cgroups (cgroups hierachy related VMs managed by libvirt). virsh cpu-stats command is not working in our platform : virsh # cpu-stats test_vm error: Failed to virDomainGetCPUStats() error: Requested operation is not valid: cgroup CPUACCT controller is not mounted It should show info like this. $ virsh cpu-stats test_vm CPU0: cpu_time 0.025812184 seconds vcpu_time 0.025812184 seconds CPU1: cpu_time 4.893484927 seconds vcpu_time 4.893484927 seconds Total: cpu_time 4.924620941 seconds user_time 1.060000000 seconds system_time 3.050000000 seconds We are suspecting some issue in virsh when it is trying to find to where that cgroups is mounted in a system (default in ubuntu is /sys/fs/cgroup/cpuset/libvirt/, but in our platform uses /dev/cgroup_xxx). Find /proc/cgroups and /proc/mounts log below: ================================== # cat /proc/cgroups #subsys_name hierarchy num_cgroups enabled cpuset 0 1 1 ns 0 1 1 cpu 1 3 1 cpuacct 0 1 1 memory 2 1 1 freezer 0 1 1 net_cls 0 1 1 blkio 0 1 1 # cat /proc/mounts cpu /dev/cgroup_cpu cgroup rw,relatime,cpu 0 0 memory /dev/cgroup_mem cgroup rw,relatime,memory 0 0 Can you please help us in this regard to enable this command in our platform, Thanks in advance !!! Regards, Anusha

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[libvirt-users] Usual number of guests on a host
by Parakkal, Navin S 29 May '13

29 May '13

Hi, Can someone tell us what is the usual number of guests on a typical host in a production environment ? Has someone tested this ? What number does it scale to ? We have around 150 per host running fine. Regards, Navin

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[libvirt-users] libvirt for Citrix XenServer
by Parakkal, Navin S 29 May '13

29 May '13

Hi, Can someone send me the build steps how to build for Citrix XenServer ? I want to build a version of libvirt for Citrix XenServer. Regards, Navin

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Re: [libvirt-users] libvirt for Citrix XenServer
by Parakkal, Navin S 28 May '13

28 May '13

________________________________ From: Prasad [prasad(a)mukhedkar.com] Sent: Tuesday, May 28, 2013 7:33 PM To: Parakkal, Navin S Subject: Re: [libvirt-users] libvirt for Citrix XenServer On 05/27/2013 12:13 PM, Parakkal, Navin S wrote: Hi, Can someone send me the build steps how to build for Citrix XenServer ? I want to build a version of libvirt for Citrix XenServer. Regards, Navin _______________________________________________ libvirt-users mailing list libvirt-users(a)redhat.com<mailto:libvirt-users@redhat.com> https://www.redhat.com/mailman/listinfo/libvirt-users Navin, I don't think libvirt supports Citrix XenServer hypervisors. per the libvirt.org only following hypervisors are supported : * The KVM/QEMU<http://libvirt.org/drvqemu.html> Linux hypervisor * The Xen<http://libvirt.org/drvxen.html> hypervisor on Linux and Solaris hosts. * The LXC<http://libvirt.org/drvlxc.html> Linux container system * The OpenVZ<http://libvirt.org/drvopenvz.html> Linux container system * The User Mode Linux<http://libvirt.org/drvuml.html> paravirtualized kernel * The VirtualBox<http://libvirt.org/drvvbox.html> hypervisor * The VMware ESX and GSX<http://libvirt.org/drvesx.html> hypervisors * The VMware Workstation and Player<http://libvirt.org/drvvmware.html> hypervisors * The Microsoft Hyper-V<http://libvirt.org/drvhyperv.html> hypervisor * The IBM PowerVM<http://libvirt.org/drvphyp.html> hypervisor * The Parallels<http://libvirt.org/drvparallels.html> hypervisor > I think that is out of the box . I found these steps but was thinking if there is any wiki or link. https://www.redhat.com/archives/libvirt-users/2011-June/msg00042.html http://stackoverflow.com/questions/7130665/install-libvirt-with-xenserver-a…

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