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[libvirt-users] Migration Clarification Request
by The PowerTool 30 Aug '13

30 Aug '13

I built a vm with the guest OS Windows XP. I have it running exactly the way I need it. Now I need to move it to a computer at another location. My plan was to build the vm and then just copy the ISO and take it to the new system. Specifications: Host OS is a current/up-to-date Fedora 18 I used yum install @virtualization I launched boxes in gnome and installed the guest system (XP) After getting everything running to my specifications I started researching how to move the vm to another system. I have one question: Referring to the information at: http://libvirt.org/migration.html " Migration of guests between hosts is a complicated problem" Can someone please point me to documentation stating why migration is "a complicated problem"?? The vm is powered off. I didn't use encryption (that I'm aware of--and I hope that doesn't bite me but I can re-install if necessary). gnome-boxes made this a pretty-simple setup and I like it. I know with about the same effort I can do this in VMWare, if necessary. I also know with VMWare I can create vm images that are portable and easily transported from system to system. If that is not the case with libvirt and gnome-boxes I'd like to understand why. Even though gnome-boxes made the setup fairly easy I can see where it is still in it's infancy. I thought libvirt was more mature and seems to offer CL access to everything I need (which I really like). Thanks, in-advance, for your help and consideration. ThePowerTool "You're darn right, more power."--Tim "the toolman" Taylor

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[libvirt-users] Finding out CPU topology
by Peeyush Gupta 29 Aug '13

29 Aug '13

Hi, I have been trying to find out CPU topology using libvirt. I understand that I can find out the number of cores/sockets/ threads etc through getCapabilities() function. What I am wondering is that is there any function that can provide me the exact topology like how many sockets, how many sockets per core and number of threads per core, if applicable or may be info about numa cells. Is there any mechanism to achieve this? Thanks, ~Peeyush Gupta

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[libvirt-users] Defining VM with snapshots?
by Skardal, Harald 28 Aug '13

28 Aug '13

All, Using Centos 6.4 with provided libvirt: [root@node1 ~]# rpm -q libvirt libvirt-1.0.1-2.el6.x86_64 Assume a VM with one or more live snapshots. In virsh the VM snapshots can be listed. With virsh: - Stop and undefine this VM. - Then define (and start) this VM. The new VM does not have the list of snapshots. Is there a way with virsh to rebuild the metadata such that libvirt "knows" about the snapshots in the "disk stack"? Harald

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[libvirt-users] Oracle RAC in libvirt+KVM environment
by Timon Wang 27 Aug '13

27 Aug '13

We wan't to setup two Oracle instance and make RAC work on them. Both VM are setup based on libvirt + KVM, we use a lvm lun which formated in qcow2 format and set the shareable properties in the disk driver like this: <disk type='block' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source dev='/dev/81035c32-d2e4-4aaf-82fa-3e76ae587586/ca18f6a5-7c98-46ea-b562-9424e68a52f3'/> <target dev='hda' bus='ide'/> <shareable/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> But when we use it as shared data disk like we use iscsi/FC disk for shared data disk, the disk can't be recognized as a share disk, and RAC can't be setup in the environment. Any body can give me some guild on this? I am wondering shareable in the libvirt config really makes the disk shareable? How can I setup the RAC environment in this situable? I found that vmware and vbox can do this according to a blog post, I am wondering if kvm has this ability to make a disk really shareable. -- Focus on: Server Vitualization, Network security,Scanner,NodeJS,JAVA,WWW Blog: http://www.nohouse.net

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[libvirt-users] How to deal with LXC cgroup access control with apparmor ?
by 止语 27 Aug '13

27 Aug '13

I am playing with libvirt 1.1.1 (lxc) when I was starting a LXC container, the process location of cgroup is pretty , just the root directory from the process. But I could tune the cgroup in a container as an user that logged, This is not accepted... I wonder how to restrict it with apparmor ,so one can not modify files in the cgroup fs, e.g the cpus or mem, if i restrict it with "deny /sys/fs/cgroup/** wrklx," in apparmor ,the container woulld not start up . "Permission denied", because that a process would mount the cgroup, it seems done by libvirt_lxc, Any way to restrict the cgroup in the container or just not mount cgroup in the container ?? Any help would be appreciated, thanks .

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[libvirt-users] Fwd: The error for creating a new vm for kvm
by Qian Feng 26 Aug '13

26 Aug '13

---------- Forwarded message ---------- From: Qian Feng <qianfeng04161001(a)gmail.com> Date: Mon, Aug 26, 2013 at 12:59 PM Subject: Re: [libvirt-users] The error for creating a new vm for kvm To: Humble Chirammal <hchiramm(a)redhat.com> I use lsmod | grep kvm, it shows kvm and kvm_intel. It shows: kvm_intel 39608 0 kvm 247190 1 kvm_intel BTW, I use virt-manager to create a new virtual machine for qemu/kvm, it shows no guests are supported for this connection. I tend to restart the service for libvirtd, service libvirtd restart, it shows the error: libvirtd: unrecognized service libvirtd is in the directory: /usr/sbin/libvirtd On Mon, Aug 26, 2013 at 1:08 AM, Humble Chirammal <hchiramm(a)redhat.com>wrote: > > > > ----- Original Message ----- > | From: "Qian Feng" <qianfeng04161001(a)gmail.com> > | To: libvirt-users(a)redhat.com > | Sent: Sunday, August 25, 2013 10:20:03 PM > | Subject: [libvirt-users] The error for creating a new vm for kvm > | > | I checked the capabilities. I do not know why the guest is only for vbox. > | <guest> > | <os_type>hvm</os_type> > | <arch name='i686'> > | <wordsize>32</wordsize> > | <domain type='vbox'> > | </domain> > | </arch> > | </guest> > | > | I want it run qemu-kvm. and when i run virsh define > | /etc/libvirt/qemu/demo.xml. It shows error: Failed to define domain from > | /etc/libvirt/qemu/demo.xml > | error: unknown OS type hvm > > Any of the possibility listed here can contribute that error.. > http://humblec.com/error-libvirt-unknown-os-type-hvm/ > > | > | Then I use virsh-install --prompt to install kvm guest, it shows error: > | libvirtError: this function is not supported by the connection driver: > | virConnectNumOfDefinedStoragePools > | > | I really do not know how to do, please help me, thanks. > | > | -- > | Have a nice day! > | > | Qian > | > | _______________________________________________ > | libvirt-users mailing list > | libvirt-users(a)redhat.com > | https://www.redhat.com/mailman/listinfo/libvirt-users > -- Have a nice day! Qian -- Have a nice day! Qian

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[libvirt-users] The error for creating a new vm for kvm
by Qian Feng 26 Aug '13

26 Aug '13

I checked the capabilities. I do not know why the guest is only for vbox. <guest> <os_type>hvm</os_type> <arch name='i686'> <wordsize>32</wordsize> <domain type='vbox'> </domain> </arch> </guest> I want it run qemu-kvm. and when i run virsh define /etc/libvirt/qemu/demo.xml. It shows error: Failed to define domain from /etc/libvirt/qemu/demo.xml error: unknown OS type hvm Then I use virsh-install --prompt to install kvm guest, it shows error: libvirtError: this function is not supported by the connection driver: virConnectNumOfDefinedStoragePools I really do not know how to do, please help me, thanks. -- Have a nice day! Qian

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Re: [libvirt-users] The error for creating a new vm for kvm
by Saurabh Deochake 26 Aug '13

26 Aug '13

> Thanks, but I checked it and It shows I have already installed qemu-kvm. Please check if kvm and kvm_intel ( for systems with 'vmx' flag) / kvm_amd (systems with 'svm' flag) are loaded in the system. On Mon, Aug 26, 2013 at 9:40 AM, Qian Feng <qianfeng04161001(a)gmail.com>wrote: > Thanks, but I checked it and It shows I have already installed qemu-kvm. > > > On Mon, Aug 26, 2013 at 12:05 AM, Saurabh Deochake <saurabh.d04(a)gmail.com>wrote: > >> Hi Qian, >> >> I encountered exactly same problem. I found out that I didnot have qemu >> installed. Please check that you have qemu-kvm installed by running >> "apt-get install qemu-kvm" on debian! >> >> Thanks, >> Saurabh Deochake >> NTT DATA OSS Center. >> >> >> On Sun, Aug 25, 2013 at 10:20 PM, Qian Feng <qianfeng04161001(a)gmail.com>wrote: >> >>> I checked the capabilities. I do not know why the guest is only for >>> vbox. >>> <guest> >>> <os_type>hvm</os_type> >>> <arch name='i686'> >>> <wordsize>32</wordsize> >>> <domain type='vbox'> >>> </domain> >>> </arch> >>> </guest> >>> >>> I want it run qemu-kvm. and when i run virsh define >>> /etc/libvirt/qemu/demo.xml. It shows error: Failed to define domain from >>> /etc/libvirt/qemu/demo.xml >>> error: unknown OS type hvm >>> >>> Then I use virsh-install --prompt to install kvm guest, it shows error: >>> libvirtError: this function is not supported by the connection driver: >>> virConnectNumOfDefinedStoragePools >>> >>> I really do not know how to do, please help me, thanks. >>> >>> -- >>> Have a nice day! >>> >>> Qian >>> >>> _______________________________________________ >>> libvirt-users mailing list >>> libvirt-users(a)redhat.com >>> https://www.redhat.com/mailman/listinfo/libvirt-users >>> >> >> > > > -- > Have a nice day! > > Qian >

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[libvirt-users] Strange connectivity issues with bridged networking and masquerade
by Kolja Scheffler 24 Aug '13

24 Aug '13

Hi all, I'm currently in the process of building a 2-Node libvirt/KVM Cluster and ran into some issues regarding the network connectivity of our virtual machines. Our setup seemed to work fine, we were able to browse to Google and our own company website and some others from within the VM. Then we tried microsoft.com to download some Windows iso images from MS Partner Network. The page started to load, but only a few elements became visible - then it sticked to: "Loading data from microsoft.com" ...forever. A few other examples that do not work are: * www.opera.com * www.amazon.com * www.speedtest.net All of these pages load without any problem, when I access them from my laptop or even with Firefox via X-Forwarding launched directly on the hypervisor system. From within the VMs they just refuse to finish loading. The only thing those pages have in common, as far as I can see, is that they heavily utilize CDNs like Amazon Cloudfront or Akamai. The idea behind our setup is, that all virtual machines communicate on the 192.168.3.0/24 network. The nodes have a VLAN connection on eth1. To allow connections between VMs on different hosts, we created the bridge device br1 with eth1 attached and added the VMs to it. eth0 provides internet access with xx.xx.220.0 as additional public failover ip. We added 192.168.3.254 as additional IP to one of the node's br1 device to use it as the default gateway for the VMs. This IP can be migrated between the nodes. Our setup looks like this: ____________ / \ ( Internet ) \____________/ / \ Node1: | | Node2: | | xx.xx.217.8 (eth0) (eth0) xx.xx.217.10 xx.xx.220.0 \ {Masq.} / (eth1)----(eth1) | | 192.168.3.1 [br1 ] [br1 ] 192.168.3.2 192.168.3.254 | | | | 192.168.3.50 (vnet0) (vnet0) 192.168.3.75 ---------- iptables looks like this: root@vm01:~# iptables -S -P INPUT ACCEPT -P FORWARD ACCEPT -P OUTPUT ACCEPT -A FORWARD -d 192.168.3.0/24 -o br1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 192.168.3.0/24 -i br1 -j ACCEPT -A FORWARD -i br1 -o br1 -j ACCEPT -A FORWARD -i eth0 -o eth0 -j ACCEPT root@vm01:~# iptables -S -t nat -P PREROUTING ACCEPT -P INPUT ACCEPT -P OUTPUT ACCEPT -P POSTROUTING ACCEPT -A POSTROUTING -s 192.168.3.0/24 ! -d 192.168.3.0/24 -j MASQUERADE -A POSTROUTING ! -s 192.168.3.0/24 -d 192.168.3.0/24 -j MASQUERADE --------- Some additional information that might be helpful: root@vm01:~# virsh version Compiled against library: libvir 0.9.12 Using library: libvir 0.9.12 Using API: QEMU 0.9.12 Running hypervisor: QEMU 1.1.2 --------- root@vm01:~# uname -a Linux vm01.cluster 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux --------- I don't know if it's really libvirt-related but perhaps someone here has an idea what to try. Any advice on this is really appreciated, as I am at my wits' end. Thank you in advance... :) Kind regards Kolja Scheffler

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[libvirt-users] virsh "cpu-stats" not working !!!
by SHREE DUTH AWASTHI 23 Aug '13

23 Aug '13

> > Hi All, > > Can you please guide us in solving this issue. > > Version used : libvirt-1.0.6 > # rpm -qa | egrep "libvirt|qemu" > qemu-kvm-0.14.1-1_WR4.3.x86_64_XXX.x86_64 > libvirt-1.0.6-1_WR4.3.x86_64_XXX.2.x86_64 > > Problem : > > # virsh cpu-stats CLA-0 > error: Failed to retrieve CPU statistics for domain 'CLA-0' > *error: internal error error accessing cgroup cpuacct for vcpu* > > Related info : > > # cat /proc/cgroups > #subsys_name hierarchy num_cgroups enabled > cpuset 3 4 1 > ns 0 1 1 > cpu 1 6 1 > cpuacct 7 3 1 > memory 2 3 1 > freezer 0 1 1 > net_cls 0 1 1 > blkio 0 1 1 > > # cat /proc/mounts | grep cpu > cpu /dev/cgroup_cpu cgroup rw,relatime,cpu 0 0 > cpuset /dev/cgroup_cpuset cgroup rw,relatime,cpuset 0 0 > cpuacct /dev/cgroup_cpuacct cgroup rw,relatime,cpuacct 0 0 > > # cat /proc/self/cgroup > 7:cpuacct:/ > 3:cpuset:/ > 2:memory:/ > 1:cpu:/ > > virsh # vcpucount CLA-0 > maximum config 3 > maximum live 3 > current config 3 > current live 3 > > virsh # vcpuinfo CLA-0 > VCPU: 0 > CPU: 0 > State: running > CPU time: 5.7s > CPU Affinity: yyyyyyyy > > virsh # vcpupin CLA-0 --current > VCPU: CPU Affinity > ---------------------------------- > 0: 0-7 > 1: 0-7 > 2: 0-7 > > # cat /dev/cgroup_cpuacct/cpuacct.usage_percpu > 532996776861 117928641102 125174572624 167825543709 155234053284 > 97350309867 122372010702 110640812251 > # cat /dev/cgroup_cpuacct/cpuacct.usage > 1431288376064 > # cat /dev/cgroup_cpuacct/cpuacct.stat > user 12148 > system 81469 > > # cat /dev/cgroup_cpuacct/*machine*/cpuacct.usage_percpu > 0 0 0 0 0 0 0 0 > # cat /dev/cgroup_cpuacct/*machine/*cpuacct.usage > 0 > > # chkconfig --list | grep cg > cgroups_mount 0:off 1:on 2:on 3:on 4:on 5:on 6:off > > We have also found that there is no "*cgroup*" directory created under * > "/sys/fs/".* We have tried mounting the same manually using the below > commands but we were not successful. > > mkdir -p /dev/cgroup_cpuacct > mount -t cgroup -o cpuacct cpuacct /dev/cgroup_cpuacct > > (or) > > mkdir -p /sys/fs/cgroup > mount -t cgroup -o cgroup cgroup /sys/fs/cgroup > > > Please find the the domain info used for the creation of VM in the > attachment. Please let us know, how to proceed futher. > > Your inputs would be of great help to us. > > Thanks and Regards, > Shree Duth Awasthi. >

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