scheduler: change fit predicates and priority func as needed for optimization

plugin/pkg/scheduler/schedulercache/util.go

@@ -0,0 +1,35 @@
+/*
+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 schedulercache
+
+import "k8s.io/kubernetes/pkg/api"
+
+// CreateNodeNameToInfoMap obtains a list of pods and pivots that list into a map where the keys are node names
+// and the values are the aggregated information for that node.
+func CreateNodeNameToInfoMap(pods []*api.Pod) map[string]*NodeInfo {
+	nodeNameToInfo := make(map[string]*NodeInfo)
+	for _, pod := range pods {
+		nodeName := pod.Spec.NodeName
+		nodeInfo, ok := nodeNameToInfo[nodeName]
+		if !ok {
+			nodeInfo = NewNodeInfo()
+			nodeNameToInfo[nodeName] = nodeInfo
+		}
+		nodeInfo.addPod(pod)
+	}
+	return nodeNameToInfo
+}