Add QoS support on node

pkg/util/oom/oom.go

@@ -0,0 +1,26 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package oom
+
+// This is a struct instead of an interface to allow injection of process ID listers and
+// applying OOM score in tests.
+// TODO: make this an interface, and inject a mock ioutil struct for testing.
+type OomAdjuster struct {
+	pidLister                 func(cgroupName string) ([]int, error)
+	ApplyOomScoreAdj          func(pid int, oomScoreAdj int) error
+	ApplyOomScoreAdjContainer func(cgroupName string, oomScoreAdj, maxTries int) error
+}