CentOS virt - Mar 2017 - unable to execute QEMU command 'migrate': this feature or command is not currently supported

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 at centos.org] On Behalf Of Sandro
Bonazzola
Sent: Thursday, March 16, 2017 10:57 PM
To: Discussion about the virtualization on CentOS <centos-virt at
centos.org>; Paolo Bonzini <pbonzini at 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 at guggiana.ch
<mailto:valentin at 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 at
a.b.c.d/system

Any help would be greatly appreciated.


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





 

-- 

Sandro Bonazzola
Better technology. Faster innovation. Powered by community collaboration.
See how it works at redhat.com <http://redhat.com> 

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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

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 at centos.org] On Behalf Of
Valentin Guggiana
Sent: Monday, March 20, 2017 8:47 PM
To: Discussion about the virtualization on CentOS <centos-virt at
centos.org>;
'Paolo Bonzini' <pbonzini at 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 at centos.org
https://lists.centos.org/mailman/listinfo/centos-virt