metrics_generator.go

package main

import (
	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promhttp"
	"net/http"
	"time"
)

var (
	testHistogramVec = prometheus.NewHistogramVec(prometheus.HistogramOpts{
		Name: "test_histogram_seconds",
		Help: "example metrics",
	}, []string{"label_1"})
)

func main() {
	prometheus.Register(testHistogramVec)
	for i := 0; i < 1; i++ {
		go func() {
			for {
				testHistogramVec.With(prometheus.Labels{
					"label_1": "value_1",
				}).Observe(1)
				time.Sleep(time.Second)
			}
		}()
	}

	http.Handle("/metrics", promhttp.Handler())
	http.ListenAndServe(":2112", nil)
}