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i'm seeing the same behaviour. i'm trying to configure NetApp NFS (7mode), using havana. I have configured cinder correctly, I can create volumes and boot instances from them.

Trying to perform a live migration for a VM running on server1.example.com to server2.example.com shows the following in the server1.example.com:/var/log/nova/compute.log

"InvalidSharedStorage: server2.example.com is not on shared storage: Live migration can not be used without shared storage."

On both server[1-2].example.com the NFS volume is mounted (as /var/lib/nova/mnt/5547cefd223df00df6e37cdd7e810415)

Any suggestions as to why this is failing would be greatly appreciated.