Valentin,

Please check if the VM guest has vm-tools installed else the “virsh migrate --live” parameter requirement is not fulfilled else you has to turn off the VM guest and do the offline “virsh migrate” without “--live” options. Hope that helps.

Xlord

From: CentOS-virt [mailto:centos-virt-bounces@centos.org] On Behalf Of Sandro Bonazzola Sent: Thursday, March 16, 2017 10:57 PM To: Discussion about the virtualization on CentOS centos-virt@centos.org; Paolo Bonzini pbonzini@redhat.com Subject: Re: [CentOS-virt] unable to execute QEMU command 'migrate': this feature or command is not currently supported

Adding Paolo

On Thu, Mar 16, 2017 at 1:50 PM, Valentin Guggiana <valentin@guggiana.ch mailto:valentin@guggiana.ch > wrote:

Hi all

I'm trying to do a live migration with non-shared storage on CentOS 7. It was working well doing it from CentOS 6 to CentOS 7 but not between to CentOS 7 machines. I read that this feature was removed in RHEL/CentOS 7 but should be available in the CentOS-QEMU-EV repository. But I still get the error using qemu-kvm-ev:

error: internal error: unable to execute QEMU command 'migrate': this feature or command is not currently supported

My installed libvirt and qemu packets are:

libvirt-2.0.0-10.el7_3.5.x86_64 libvirt-client-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-config-network-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-config-nwfilter-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-interface-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-lxc-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-network-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-nodedev-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-nwfilter-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-qemu-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-secret-2.0.0-10.el7_3.5.x86_64 libvirt-daemon-driver-storage-2.0.0-10.el7_3.5.x86_64 libvirt-glib-0.2.3-1.el7.x86_64 libvirt-python-2.0.0-2.el7.x86_64 qemu-img-ev-2.6.0-28.el7_3.6.1.x86_64 qemu-kvm-common-ev-2.6.0-28.el7_3.6.1.x86_64 qemu-kvm-ev-2.6.0-28.el7_3.6.1.x86_64 qemu-kvm-tools-ev-2.6.0-28.el7_3.6.1.x86_64

My command is: virsh migrate --live --copy-storage-all --persistent --undefinesource --tunnelled --p2p --verbose --xml server.xml server qemu+ssh://xxx@a.b.c.d/system

Any help would be greatly appreciated.

Thanks, Valentin _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org mailto:CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt

Hum..if the live migration is not happening on a shared storage, then I think it is best to have offline migration copy to image and hook up to the destinated server instead, this is a short-cut path I suppose.

Xlord

-----Original Message----- From: CentOS-virt [mailto:centos-virt-bounces@centos.org] On Behalf Of Valentin Guggiana Sent: Monday, March 20, 2017 8:47 PM To: Discussion about the virtualization on CentOS centos-virt@centos.org; 'Paolo Bonzini' pbonzini@redhat.com Subject: Re: [CentOS-virt] unable to execute QEMU command 'migrate': this feature or command is not currently supported

Dear Xlord

Please check if the VM guest has vm-tools installed else the "virsh migrate --live" parameter requirement is not fulfilled else you has to turn off the VM guest and do the offline "virsh migrate" without "--live" options. Hope that helps.

As far as I know (and it definitely worked in CentOS 6 and from CentOS 6 to CentOS 7) no guest tools are needed. But I tried it nevertheless: did not work :(

Live migration with shared storage works fine but in my case I need to do live migrations without shared storage (in order to free running hosts to upgrade their OSes and setup shared storage)

I suspect either that the qemu-kvm binary from qemu-kvm-ev-2.6.0-28 is missing this feature or it is called without a needed option. Comparing running qemu-kvm processes on CentOS 6 and CentOS 7 I can see that those on CentOS 6 have -enable-kvm on the command lime but those on CentOS 7 have not.

How can the qemu-kvm binary be checked to see if the feature is enabled?

Thanks, Valentin _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt