76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
/*
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Copyright 2016 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 prometheus creates and registers prometheus metrics with
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// rest clients. To use this package, you just have to import it.
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package prometheus
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import (
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"net/url"
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"time"
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"k8s.io/kubernetes/pkg/client/metrics"
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"github.com/prometheus/client_golang/prometheus"
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)
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const restClientSubsystem = "rest_client"
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var (
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// requestLatency is a Prometheus Summary metric type partitioned by
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// "verb" and "url" labels. It is used for the rest client latency metrics.
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requestLatency = prometheus.NewSummaryVec(
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prometheus.SummaryOpts{
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Subsystem: restClientSubsystem,
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Name: "request_latency_microseconds",
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Help: "Request latency in microseconds. Broken down by verb and URL",
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MaxAge: time.Hour,
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},
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[]string{"verb", "url"},
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)
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requestResult = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Subsystem: restClientSubsystem,
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Name: "request_status_codes",
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Help: "Number of http requests, partitioned by metadata",
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},
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[]string{"code", "method", "host"},
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)
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)
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func init() {
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prometheus.MustRegister(requestLatency)
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prometheus.MustRegister(requestResult)
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metrics.Register(&latencyAdapter{requestLatency}, &resultAdapter{requestResult})
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}
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type latencyAdapter struct {
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m *prometheus.SummaryVec
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}
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func (l *latencyAdapter) Observe(verb string, u url.URL, latency time.Duration) {
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microseconds := float64(latency) / float64(time.Microsecond)
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l.m.WithLabelValues(verb, u.String()).Observe(microseconds)
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}
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type resultAdapter struct {
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m *prometheus.CounterVec
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}
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func (r *resultAdapter) Increment(code, method, host string) {
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r.m.WithLabelValues(code, method, host).Inc()
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}
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