Noisy Neighbor Strategy

Added strategy to identify and migrate a Noisy Neighbor - a low priority VM
that negatively affects peformance of a high priority VM by over utilizing
Last Level Cache.

Partially Implements: blueprint noisy-neighbor-strategy

Change-Id: Ia13f7e91a695024410b8f3b3d3d1646a0dd687d4

watcher/decision_engine/goal/__init__.py

@@ -21,6 +21,8 @@ ServerConsolidation = goals.ServerConsolidation
 ThermalOptimization = goals.ThermalOptimization
 Unclassified = goals.Unclassified
 WorkloadBalancing = goals.WorkloadBalancing
+NoisyNeighbor = goals.NoisyNeighborOptimization
 
 __all__ = ("Dummy", "ServerConsolidation", "ThermalOptimization",
-           "Unclassified", "WorkloadBalancing", )
+           "Unclassified", "WorkloadBalancing",
+           "NoisyNeighborOptimization",)

watcher/decision_engine/goal/goals.py

@@ -166,3 +166,29 @@ class AirflowOptimization(base.Goal):
     def get_efficacy_specification(cls):
         """The efficacy spec for the current goal"""
         return specs.Unclassified()
+
+
+class NoisyNeighborOptimization(base.Goal):
+    """NoisyNeighborOptimization
+
+    This goal is used to identify and migrate a Noisy Neighbor -
+    a low priority VM that negatively affects peformance of a high priority VM
+    in terms of IPC by over utilizing Last Level Cache.
+    """
+
+    @classmethod
+    def get_name(cls):
+        return "noisy_neighbor"
+
+    @classmethod
+    def get_display_name(cls):
+        return _("Noisy Neighbor")
+
+    @classmethod
+    def get_translatable_display_name(cls):
+        return "Noisy Neighbor"
+
+    @classmethod
+    def get_efficacy_specification(cls):
+        """The efficacy spec for the current goal"""
+        return specs.Unclassified()