113 lines
2.8 KiB
Go
113 lines
2.8 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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"io"
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"reflect"
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"strings"
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"github.com/golang/glog"
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"github.com/prometheus/common/expfmt"
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"github.com/prometheus/common/model"
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)
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type Metrics map[string]model.Samples
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func (m *Metrics) Equal(o Metrics) bool {
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leftKeySet := []string{}
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rightKeySet := []string{}
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for k := range *m {
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leftKeySet = append(leftKeySet, k)
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}
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for k := range o {
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rightKeySet = append(rightKeySet, k)
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}
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if !reflect.DeepEqual(leftKeySet, rightKeySet) {
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return false
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}
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for _, k := range leftKeySet {
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if !(*m)[k].Equal(o[k]) {
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return false
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}
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}
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return true
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}
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func PrintSample(sample *model.Sample) string {
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buf := make([]string, 0)
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// Id is a VERY special label. For 'normal' container it's usless, but it's necessary
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// for 'system' containers (e.g. /docker-daemon, /kubelet, etc.). We know if that's the
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// case by checking if there's a label "kubernetes_container_name" present. It's hacky
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// but it works...
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_, normalContainer := sample.Metric["kubernetes_container_name"]
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for k, v := range sample.Metric {
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if strings.HasPrefix(string(k), "__") {
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continue
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}
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if string(k) == "id" && normalContainer {
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continue
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}
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buf = append(buf, fmt.Sprintf("%v=%v", string(k), v))
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}
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return fmt.Sprintf("[%v] = %v", strings.Join(buf, ","), sample.Value)
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}
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func NewMetrics() Metrics {
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result := make(Metrics)
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return result
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}
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func parseMetrics(data string, output *Metrics) error {
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dec := expfmt.NewDecoder(strings.NewReader(data), expfmt.FmtText)
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decoder := expfmt.SampleDecoder{
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Dec: dec,
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Opts: &expfmt.DecodeOptions{},
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}
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for {
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var v model.Vector
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if err := decoder.Decode(&v); err != nil {
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if err == io.EOF {
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// Expected loop termination condition.
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return nil
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}
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glog.Warningf("Invalid Decode. Skipping.")
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continue
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}
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for _, metric := range v {
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name := string(metric.Metric[model.MetricNameLabel])
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(*output)[name] = append((*output)[name], metric)
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}
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}
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}
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func (g *MetricsGrabber) getMetricsFromPod(podName string, namespace string, port int) (string, error) {
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rawOutput, err := g.client.Core().RESTClient().Get().
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Prefix("proxy").
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Namespace(namespace).
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Resource("pods").
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Name(fmt.Sprintf("%v:%v", podName, port)).
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Suffix("metrics").
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Do().Raw()
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if err != nil {
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return "", err
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}
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return string(rawOutput), nil
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}
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