64 lines
2.2 KiB
Go
64 lines
2.2 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package metrics
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import (
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"fmt"
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)
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// GetResourceUtilizationRatio takes in a set of metrics, a set of matching requests,
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// and a target utilization percentage, and calcuates the the ratio of
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// desired to actual utilization (returning that and the actual utilization)
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func GetResourceUtilizationRatio(metrics PodResourceInfo, requests map[string]int64, targetUtilization int32) (float64, int32, error) {
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metricsTotal := int64(0)
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requestsTotal := int64(0)
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for podName, metricValue := range metrics {
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request, hasRequest := requests[podName]
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if !hasRequest {
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// we check for missing requests elsewhere, so assuming missing requests == extraneous metrics
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continue
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}
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metricsTotal += metricValue
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requestsTotal += request
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}
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// if the set of requests is completely disjoint from the set of metrics,
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// then we could have an issue where the requests total is zero
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if requestsTotal == 0 {
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return 0, 0, fmt.Errorf("no metrics returned matched known pods")
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}
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currentUtilization := int32((metricsTotal * 100) / requestsTotal)
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return float64(currentUtilization) / float64(targetUtilization), currentUtilization, nil
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}
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// GetMetricUtilizationRatio takes in a set of metrics and a target utilization value,
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// and calcuates the ratio of desired to actual utilization
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// (returning that and the actual utilization)
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func GetMetricUtilizationRatio(metrics PodMetricsInfo, targetUtilization float64) (float64, float64) {
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metricsTotal := float64(0)
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for _, metricValue := range metrics {
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metricsTotal += metricValue
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}
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currentUtilization := metricsTotal / float64(len(metrics))
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return currentUtilization / targetUtilization, currentUtilization
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}
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