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