monitoring

Prometheus monitoring for Hertz

Usage Example

Server

package main

import (
	"context"
	"time"

	"github.com/cloudwego/hertz/pkg/app"
	"github.com/cloudwego/hertz/pkg/app/server"
	prometheus "github.com/hertz-contrib/monitor-prometheus"
)

func main() {
	//...
	h := server.Default(
		server.WithHostPorts("127.0.0.1:8080"),
		server.WithTracer(
			prometheus.NewServerTracer(":9091", "/hertz"),
		),
	)

	h.GET("/metricGet", func(c context.Context, ctx *app.RequestContext) {
		ctx.String(200, "hello get")
	})

	h.POST("/metricPost", func(c context.Context, ctx *app.RequestContext) {
		time.Sleep(100 * time.Millisecond)
		ctx.String(200, "hello post")
	})

	h.Spin()
}

HOW-TO-RUN

1. install docker and start docker

2. change $inetIP to local ip in line 30 of prometheus.yml

3. run Prometheus and Grafana docker-compose up or docker compose up

4. run Hertz server go run main.go

5. run Hertz client go run client/main.go

6. visit http://localhost:3000, the account password is admin by default

7. configure Prometheus data sources

   1. Connections
   2. Data sources
   3. Add new data source
   4. Select Prometheus and fill the URL with http://prometheus:9090
   5. click Save & test after configuration to test if it works

8. add dashboard Dashboards -> New -> New dashboard, add monitoring metrics such as throughput and pct99 according to your needs, for example:

   • server throughput of succeed requests

   sum(rate(hertz_server_throughput{statusCode="200"}[1m])) by (method)

   • server latency pct99 of succeed requests

   histogram_quantile(0.9,sum(rate(hertz_server_latency_us_bucket{statusCode="200"}[1m]))by(le))

For more information about hertz monitoring, please click monitoring