mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-02 11:10:18 +00:00
150 lines
4.2 KiB
Go
150 lines
4.2 KiB
Go
|
/*
|
||
|
Copyright 2019 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 testutil
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"io"
|
||
|
"reflect"
|
||
|
"strings"
|
||
|
|
||
|
"github.com/prometheus/common/expfmt"
|
||
|
"github.com/prometheus/common/model"
|
||
|
)
|
||
|
|
||
|
var (
|
||
|
// MetricNameLabel is label under which model.Sample stores metric name
|
||
|
MetricNameLabel model.LabelName = model.MetricNameLabel
|
||
|
// QuantileLabel is label under which model.Sample stores latency quantile value
|
||
|
QuantileLabel model.LabelName = model.QuantileLabel
|
||
|
)
|
||
|
|
||
|
// Metrics is generic metrics for other specific metrics
|
||
|
type Metrics map[string]model.Samples
|
||
|
|
||
|
// Equal returns true if all metrics are the same as the arguments.
|
||
|
func (m *Metrics) Equal(o Metrics) bool {
|
||
|
leftKeySet := []string{}
|
||
|
rightKeySet := []string{}
|
||
|
for k := range *m {
|
||
|
leftKeySet = append(leftKeySet, k)
|
||
|
}
|
||
|
for k := range o {
|
||
|
rightKeySet = append(rightKeySet, k)
|
||
|
}
|
||
|
if !reflect.DeepEqual(leftKeySet, rightKeySet) {
|
||
|
return false
|
||
|
}
|
||
|
for _, k := range leftKeySet {
|
||
|
if !(*m)[k].Equal(o[k]) {
|
||
|
return false
|
||
|
}
|
||
|
}
|
||
|
return true
|
||
|
}
|
||
|
|
||
|
// NewMetrics returns new metrics which are initialized.
|
||
|
func NewMetrics() Metrics {
|
||
|
result := make(Metrics)
|
||
|
return result
|
||
|
}
|
||
|
|
||
|
// ParseMetrics parses Metrics from data returned from prometheus endpoint
|
||
|
func ParseMetrics(data string, output *Metrics) error {
|
||
|
dec := expfmt.NewDecoder(strings.NewReader(data), expfmt.FmtText)
|
||
|
decoder := expfmt.SampleDecoder{
|
||
|
Dec: dec,
|
||
|
Opts: &expfmt.DecodeOptions{},
|
||
|
}
|
||
|
|
||
|
for {
|
||
|
var v model.Vector
|
||
|
if err := decoder.Decode(&v); err != nil {
|
||
|
if err == io.EOF {
|
||
|
// Expected loop termination condition.
|
||
|
return nil
|
||
|
}
|
||
|
continue
|
||
|
}
|
||
|
for _, metric := range v {
|
||
|
name := string(metric.Metric[model.MetricNameLabel])
|
||
|
(*output)[name] = append((*output)[name], metric)
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// ExtractMetricSamples parses the prometheus metric samples from the input string.
|
||
|
func ExtractMetricSamples(metricsBlob string) ([]*model.Sample, error) {
|
||
|
dec := expfmt.NewDecoder(strings.NewReader(metricsBlob), expfmt.FmtText)
|
||
|
decoder := expfmt.SampleDecoder{
|
||
|
Dec: dec,
|
||
|
Opts: &expfmt.DecodeOptions{},
|
||
|
}
|
||
|
|
||
|
var samples []*model.Sample
|
||
|
for {
|
||
|
var v model.Vector
|
||
|
if err := decoder.Decode(&v); err != nil {
|
||
|
if err == io.EOF {
|
||
|
// Expected loop termination condition.
|
||
|
return samples, nil
|
||
|
}
|
||
|
return nil, err
|
||
|
}
|
||
|
samples = append(samples, v...)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// PrintSample returns formated representation of metric Sample
|
||
|
func PrintSample(sample *model.Sample) string {
|
||
|
buf := make([]string, 0)
|
||
|
// Id is a VERY special label. For 'normal' container it's useless, but it's necessary
|
||
|
// for 'system' containers (e.g. /docker-daemon, /kubelet, etc.). We know if that's the
|
||
|
// case by checking if there's a label "kubernetes_container_name" present. It's hacky
|
||
|
// but it works...
|
||
|
_, normalContainer := sample.Metric["kubernetes_container_name"]
|
||
|
for k, v := range sample.Metric {
|
||
|
if strings.HasPrefix(string(k), "__") {
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
if string(k) == "id" && normalContainer {
|
||
|
continue
|
||
|
}
|
||
|
buf = append(buf, fmt.Sprintf("%v=%v", string(k), v))
|
||
|
}
|
||
|
return fmt.Sprintf("[%v] = %v", strings.Join(buf, ","), sample.Value)
|
||
|
}
|
||
|
|
||
|
// ComputeHistogramDelta computes the change in histogram metric for a selected label.
|
||
|
// Results are stored in after samples
|
||
|
func ComputeHistogramDelta(before, after model.Samples, label model.LabelName) {
|
||
|
beforeSamplesMap := make(map[string]*model.Sample)
|
||
|
for _, bSample := range before {
|
||
|
beforeSamplesMap[makeKey(bSample.Metric[label], bSample.Metric["le"])] = bSample
|
||
|
}
|
||
|
for _, aSample := range after {
|
||
|
if bSample, found := beforeSamplesMap[makeKey(aSample.Metric[label], aSample.Metric["le"])]; found {
|
||
|
aSample.Value = aSample.Value - bSample.Value
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func makeKey(a, b model.LabelValue) string {
|
||
|
return string(a) + "___" + string(b)
|
||
|
}
|