| Hi JP, my bet is that this is a writing permissions issue. Does nova has the right to write within the mounted directory?
Razique Mahroua - Nuage & CoTel : +33 9 72 37 94 15 
Hi,
We've started implementing a Glusterfs-based solution for instance storage in order to provide live migration. I've run into a strange problem when using a multi-node Gluster setup that I hope someone has a suggestion to resolve.
I have a 12 node distributed/replicated Gluster cluster. I can mount it to my client machines, and it seems to be working alright. When I launch instances, the nova-compute log on the client machines are giving me two error messages:
First is a qemu-kvm error: could not open disk image /exports/instances/instances/instance-00000242/disk: Invalid argument
(full output at http://pastebin.com/i8vzWegJ)
The second error message comes a short time later ending with nova.openstack.common.rpc.amqp Invalid: Instance has already been created
(full output at http://pastebin.com/6Ta4kkBN)
This happens reliably with the multi-Gluster-node setup. Oddly, after creating a test Gluster volume composed of a single brick and single node, everything works fine.
Does anyone have any suggestions?
thanks,
JP
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