Hi, I posted two messages to ask.ubuntu about my problem without solution: https://ask.openstack.org/en/question/12033/live-migration-with-qemu-is-possible/ (https://ask.openstack.org/en/question...) https://ask.openstack.org/en/question/12134/live-migration-with-qemu-is-really-possible/ (https://ask.openstack.org/en/question...) and I reported the problem in #openstack. Until now, I can't find a solution.

I'm using Openstack Havana in CentOS. I've installed 1 controller and 2 compute nodes, with NFS. Controller folder is shared by the compute nodes (folder /var/lib/nova/instances). All nodes are accessible among them without password. I can perform a migration in the dashboard. In the shell, I exaustivelly tried live migration without sucess. I'm setting /etc/nova/nova.conf and uncomment all live-migration options. I'm trying the following in the shell:

nova live-migration MY_UUID_VM_INSTANCE my_host_destine

But silenty this command not works.

Finally, my log of /var/log/nova-all.log:

<0>Feb 17 20:19:43 node-4 ¿<179>nova-nova.openstack.common.rpc.amqp ERROR: Exception during message handling Traceback (most recent call last):   File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/amqp.py", line 461, in _process_data     *args)   File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/dispatcher.py", line 172, in dispatch     result = getattr(proxyobj, method)(ctxt, *kwargs)   File "/usr/lib/python2.6/site-packages/nova/exception.py", line 90, in wrapped     payload)   File "/usr/lib/python2.6/site-packages/nova/exception.py", line 73, in wrapped     return f(self, context, args, *kw)   File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 4016, in pre_live_migration     migrate_data)   File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 4162, in pre_live_migration     self._create_images_and_backing(context, instance, instance_dir, UnboundLocalError: local variable 'instance_dir' referenced before assignment <0>Feb 17 20:20:16 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Auditing locally available compute resources <0>Feb 17 20:20:16 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free ram (MB): 1494 <0>Feb 17 20:20:16 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free disk (GB): 14 <0>Feb 17 20:20:16 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free VCPUS: 2 <0>Feb 17 20:20:16 node-4 ¿<182>nova-nova.compute.resource_tracker INFO: Compute_service record updated for node-4.domain.tld:node-4.domain.tld <0>Feb 17 20:21:15 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Auditing locally available compute resources <0>Feb 17 20:21:15 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free ram (MB): 1494 <0>Feb 17 20:21:15 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free disk (GB): 14 <0>Feb 17 20:21:15 node-4 ¿<180>nova-nova.compute.resource_tracker AUDIT: Free VCPUS: 2 <0>Feb 17 20:21:15 node-4 ¿<182>nova-nova.compute.resource_tracker INFO: Compute_service record updated for node-4.domain.tld:node-4.domain.tld

This is a bug? Someone could help me? I should use KVM instead qemu? Any help is usefull. Thanks in advance.