vm: make Instance.allocate_node smarter

circle/vm/models/instance.py

@@ -910,10 +910,16 @@ class Instance(AclBase, VirtualMachineDescModel, StatusModel, OperatedMixin,
         delete_dump.apply_async(args=[self.mem_dump['path']],
                                 queue=queue_name).get(timeout=timeout)
 
-    def allocate_node(self):
-        if self.node is None:
-            self.node = self.select_node()
+    def allocate_node(self, activity):
+        if self.node is not None:
+            return None
+
+        with activity.sub_activity(
+                'scheduling',
+                readable_name=ugettext_noop("schedule")) as sa:
+            sa.result = self.node = self.select_node()
             self.save()
+            return self.node
 
     def yield_node(self):
         if self.node is not None:

circle/vm/operations.py

@@ -276,7 +276,7 @@ class DeployOperation(InstanceOperation):
     def _operation(self, activity, timeout=15):
         # Allocate VNC port and host node
         self.instance.allocate_vnc_port()
-        self.instance.allocate_node()
+        self.instance.allocate_node(activity)
 
         # Deploy virtual images
         with activity.sub_activity(
@@ -385,12 +385,7 @@ class MigrateOperation(InstanceOperation):
 
     def _operation(self, activity, to_node=None, timeout=120):
         if not to_node:
-            with activity.sub_activity('scheduling',
-                                       readable_name=ugettext_noop(
-                                           "schedule")) as sa:
-                to_node = self.instance.select_node()
-                sa.result = to_node
-
+            self.instance.allocate_node(activity)
         try:
             with activity.sub_activity(
                 'migrate_vm', readable_name=create_readable(
@@ -744,7 +739,7 @@ class WakeUpOperation(InstanceOperation):
     def _operation(self, activity, timeout=60):
         # Schedule vm
         self.instance.allocate_vnc_port()
-        self.instance.allocate_node()
+        self.instance.allocate_node(activity)
 
         # Resume vm
         with activity.sub_activity(
@@ -758,13 +753,6 @@ class WakeUpOperation(InstanceOperation):
                 "deploy network")):
             self.instance.deploy_net()
 
-        activity.result = create_readable(
-            "",
-            ugettext_noop(
-                "Scheduled to %(node)s" % {'node': self.instance.node.name}
-            )
-        )
-
         try:
             self.instance.renew(parent_activity=activity)
         except: