Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/k8s.io/kubernetes/pkg/controller/podautoscaler/metrics/utilization.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2015 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 metrics
+
+import (
+	"fmt"
+)
+
+// GetResourceUtilizationRatio takes in a set of metrics, a set of matching requests,
+// and a target utilization percentage, and calcuates the the ratio of
+// desired to actual utilization (returning that and the actual utilization)
+func GetResourceUtilizationRatio(metrics PodResourceInfo, requests map[string]int64, targetUtilization int32) (float64, int32, error) {
+	metricsTotal := int64(0)
+	requestsTotal := int64(0)
+
+	for podName, metricValue := range metrics {
+		request, hasRequest := requests[podName]
+		if !hasRequest {
+			// we check for missing requests elsewhere, so assuming missing requests == extraneous metrics
+			continue
+		}
+
+		metricsTotal += metricValue
+		requestsTotal += request
+	}
+
+	// if the set of requests is completely disjoint from the set of metrics,
+	// then we could have an issue where the requests total is zero
+	if requestsTotal == 0 {
+		return 0, 0, fmt.Errorf("no metrics returned matched known pods")
+	}
+
+	currentUtilization := int32((metricsTotal * 100) / requestsTotal)
+
+	return float64(currentUtilization) / float64(targetUtilization), currentUtilization, nil
+}
+
+// GetMetricUtilizationRatio takes in a set of metrics and a target utilization value,
+// and calcuates the ratio of desired to actual utilization
+// (returning that and the actual utilization)
+func GetMetricUtilizationRatio(metrics PodMetricsInfo, targetUtilization float64) (float64, float64) {
+	metricsTotal := float64(0)
+	for _, metricValue := range metrics {
+		metricsTotal += metricValue
+	}
+
+	currentUtilization := metricsTotal / float64(len(metrics))
+
+	return currentUtilization / targetUtilization, currentUtilization
+}