Public bug reported:

During live-migration if the process goes in a unpredictable situation
for example if QEMU suffers an issue Nova could still consider the
migration has succeeded even if not.

The VM on source node can be still registered even if stopped. In the
worst scenario, the operator could start it and so two VMs running could
share the same disk.

We should fix that issue, do not consider a migration to have succeeded
if it was not the case. For that we should handle the return
migrateToURI*


[1] 
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py#n6303
[2] 
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/migration.py#n223

** Affects: nova
     Importance: Undecided
     Assignee: sahid (sahid-ferdjaoui)
         Status: In Progress


** Tags: libvirt live-migration

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https://bugs.launchpad.net/bugs/1653718

Title:
  Target host in nova DB got updated to new compute while migration
  failed

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  During live-migration if the process goes in a unpredictable situation
  for example if QEMU suffers an issue Nova could still consider the
  migration has succeeded even if not.

  The VM on source node can be still registered even if stopped. In the
  worst scenario, the operator could start it and so two VMs running
  could share the same disk.

  We should fix that issue, do not consider a migration to have
  succeeded if it was not the case. For that we should handle the return
  migrateToURI*

  
  [1] 
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py#n6303
  [2] 
http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/migration.py#n223

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