mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-10-31 05:40:42 +00:00
68 lines
1.9 KiB
Go
68 lines
1.9 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 provides utilities for registering client metrics to Prometheus.
|
|
package metrics
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"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"},
|
|
)
|
|
)
|
|
|
|
var registerMetrics sync.Once
|
|
|
|
// Register registers all metrics to Prometheus with
|
|
// respect to the RequestLatency.
|
|
func Register() {
|
|
// Register the metrics.
|
|
registerMetrics.Do(func() {
|
|
prometheus.MustRegister(RequestLatency)
|
|
prometheus.MustRegister(RequestResult)
|
|
})
|
|
}
|
|
|
|
// Calculates the time since the specified start in microseconds.
|
|
func SinceInMicroseconds(start time.Time) float64 {
|
|
return float64(time.Since(start).Nanoseconds() / time.Microsecond.Nanoseconds())
|
|
}
|