mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-11-04 07:49:35 +00:00
67 lines
2.3 KiB
Go
67 lines
2.3 KiB
Go
/*
|
|
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 calculates the ratio of
|
|
// desired to actual utilization (returning that, the actual utilization, and the raw average value)
|
|
func GetResourceUtilizationRatio(metrics PodMetricsInfo, requests map[string]int64, targetUtilization int32) (utilizationRatio float64, currentUtilization int32, rawAverageValue int64, err error) {
|
|
metricsTotal := int64(0)
|
|
requestsTotal := int64(0)
|
|
numEntries := 0
|
|
|
|
for podName, metric := range metrics {
|
|
request, hasRequest := requests[podName]
|
|
if !hasRequest {
|
|
// we check for missing requests elsewhere, so assuming missing requests == extraneous metrics
|
|
continue
|
|
}
|
|
|
|
metricsTotal += metric.Value
|
|
requestsTotal += request
|
|
numEntries++
|
|
}
|
|
|
|
// 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, 0, fmt.Errorf("no metrics returned matched known pods")
|
|
}
|
|
|
|
currentUtilization = int32((metricsTotal * 100) / requestsTotal)
|
|
|
|
return float64(currentUtilization) / float64(targetUtilization), currentUtilization, metricsTotal / int64(numEntries), nil
|
|
}
|
|
|
|
// GetMetricUsageRatio takes in a set of metrics and a target usage value,
|
|
// and calculates the ratio of desired to actual usage
|
|
// (returning that and the actual usage)
|
|
func GetMetricUsageRatio(metrics PodMetricsInfo, targetUsage int64) (usageRatio float64, currentUsage int64) {
|
|
metricsTotal := int64(0)
|
|
for _, metric := range metrics {
|
|
metricsTotal += metric.Value
|
|
}
|
|
|
|
currentUsage = metricsTotal / int64(len(metrics))
|
|
|
|
return float64(currentUsage) / float64(targetUsage), currentUsage
|
|
}
|