Recreate domain when libvirt send us a create event and domain already exists.

cloudcontrol/node/hypervisor/__init__.py

@@ -652,6 +652,13 @@ class Hypervisor(object):
         event = EVENTS[event]
 
         if event == 'Added':
+            if dom.name() in self.domains:
+                # sometimes libvirt send us the same event multiple times
+                # this can be the result of a change in the domain configuration
+                # we first remove the old domain
+                vm = self.domains.pop(dom.name())
+                self.handler.tag_db.remove_sub_object(vm.name)
+                logger.debug('Domain %s recreated', dom.name())
             vm = VirtualMachine(dom, self)
             logger.info('Created domain %s', vm.name)
             self.domains[vm.name] = vm