Re: [libvirt] Block-migrate
On Sat, Aug 07, 2010 at 03:55:10PM +0200, Ruben Kerkhof wrote:
I've been playing with the new block-migrate feature, but am
unable to
get it to work.
[root@src ~]# virsh migrate --live --p2p --tunnelled
--copy-storage-all 4c5c75b9-decc-41c9-9296-20ca5bd5c355
qemu://dst/system
error: Unknown failure
/var/log/libvirt/qemu/4c5c75b9-decc-41c9-9296-20ca5bd5c355.log on the
destination host shows:
bind(unix:/var/run/libvirt/qemu/qemu.tunnelmigrate.dest.4c5c75b9-decc-41c9-9296-20ca5bd5c355):
Permission denied
Migration failed. Exit code
unix:/var/run/libvirt/qemu/qemu.tunnelmigrate.dest.4c5c75b9-decc-41c9-9296-20ca5bd5c355(-22),
exiting
It seems that qemu is not able to write to that location.
[root@dst qemu]# ls -ld /var/run/libvirt/qemu/
drwx------. 2 root root 4096 Aug 7 15:40 /var/run/libvirt/qemu/
As a workaround I gave qemu write permission, and now the block migrate starts.
Did the disk image files exist on the target before migration started ?
If not, then this is going to be falling foul of our security drivers
which prevent QEMU creating new files itself.
Also, a straw poll of people at the KVM forum yesterday determined that no
one had ever got block migration to work, so it might be just broken in
QEMU
Daniel
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