In the method '_sync_instance_power_state', the log info is wrong.
if self.host != db_instance.host:
# on the sending end of nova-compute _sync_power_state
# may have yielded to the greenthread performing a live
# migration; this in turn has changed the resident-host
# for the VM; However, the instance is still active, it
# is just in the process of migrating to another host.
# This implies that the compute source must relinquish
# control to the compute destination.
LOG.info(_("During the sync_power process the "
"instance has moved from "
"host %(src)s to host %(dst)s") %
{'src': self.host,
'dst': db_instance.host},
instance=db_instance)
return
The 'src' value should be 'db_instance.host'and the 'dst' value should be the 'self.host'. The method '_post_live_migration' should be invoked after the live migration completes and it is used to update the database.
In the situation, the instance has been migrated to another host successfully and the database has not been updated. The '_sync_instance_power_state' method is executed. Nova can list it in the dst host with the driver and the data in the database should be the source host.
Fix proposed to branch: master
Review: https:/