On Mon, Feb 06, 2012 at 03:08:09PM -0700, Eric Blake wrote:
> On 02/06/2012 02:59 PM, Gabriel L. Somlo wrote:
> >
> > The error message I get is:
> >
> > error: Unable to allow access for disk path
> > /var/lib/libvirt/images/my_test_vm.img: No such file or directory
>
> That means that on the destination, you have to pre-create
> /var/lib/libvirt/images/my_test_vm.img prior to calling virsh migrate
OK, so before issuing the virsh migrate command, I created an empty
file on the destination:
touch /var/lib/libvirt/images/my_test_vm.img
That didn't work -- on the destination, I got the following error in
/var/log/libvirt/qemu/my_test_vm.log:
qemu-kvm: Error getting length of block device
drive-virtio-disk0
qemu: warning: error while loading state section id 1
load of migration failed
2012-02-07 15:48:44.064+0000: shutting down
My next attempt was to create an empty file of the *same size* as on
the source:
dd if=/dev/zero of=my_test_vm.img bs=1 count=0 seek=32G
I then used the following (slightly modified) command line:
virsh -c qemu:///system migrate --live --copy-storage-all \
--persistent --undefinesource my_test_vm \
qemu+ssh://root@xxxxxxxxxxxxxxxxxxxxxxx/system
This seems to work quite nicely -- thanks for pointing me in the right
direction !
> Yes, libvirt should be taught how to make
> --copy-storage-all nicer to use, and pre-create files on users behalf,
> but no one has submitted a patch for that so far.
Thanks again,
--Gabriel
