1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
// Copyright 2022 The Prometheus 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.
// A simple example of how to exposed created timestamps in OpenMetrics format.
package main
import (
"log"
"net/http"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)
func main() {
requestDurations := prometheus.NewHistogram(prometheus.HistogramOpts{
Name: "http_request_duration_seconds",
Help: "A histogram of the HTTP request durations in seconds.",
Buckets: prometheus.ExponentialBuckets(0.1, 1.5, 5),
})
// Create non-global registry.
registry := prometheus.NewRegistry()
registry.MustRegister(
requestDurations,
)
go func() {
for {
// Record fictional latency.
now := time.Now()
requestDurations.Observe(time.Since(now).Seconds())
time.Sleep(600 * time.Millisecond)
}
}()
// Expose /metrics HTTP endpoint using the created custom registry.
http.Handle(
"/metrics", promhttp.HandlerFor(
registry,
promhttp.HandlerOpts{
EnableOpenMetrics: true,
EnableOpenMetricsTextCreatedSamples: true,
}),
)
// To test: curl -H 'Accept: application/openmetrics-text' localhost:8080/metrics
log.Fatalln(http.ListenAndServe(":8080", nil))
}
|
