Added unit test for node operation in schedulercache.

plugin/pkg/scheduler/util/utils.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+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 util
+
+import (
+	"k8s.io/kubernetes/pkg/api/v1"
+)
+
+// GetUsedPorts returns the used host ports of Pods: if 'port' was used, a 'port:true' pair
+// will be in the result; but it does not resolve port conflict.
+func GetUsedPorts(pods ...*v1.Pod) map[int]bool {
+	ports := make(map[int]bool)
+	for _, pod := range pods {
+		for j := range pod.Spec.Containers {
+			container := &pod.Spec.Containers[j]
+			for k := range container.Ports {
+				podPort := &container.Ports[k]
+				// "0" is explicitly ignored in PodFitsHostPorts,
+				// which is the only function that uses this value.
+				if podPort.HostPort != 0 {
+					ports[int(podPort.HostPort)] = true
+				}
+			}
+		}
+	}
+	return ports
+}