Go ??????? Prometheus? ???? ?? ??? ?????? ?? ?????. Prometheus ??? ?????. Prometheus ????? ?????? ???? MetricsHandler? ????. ??? ??? HTTP ??? ????? promhttp ??? ??????. ???? ????? Prometheus.Register()? ??????. NewTimer() ? ObserveDuration()? ???? ?? ?? ??? ?????. Prometheus ? UI? ????? ?? ??? ??????.

Prometheus? ???? Go ???? ?? ?? ????

Go ??????? ?? ?? ????? ??? ??? ?? ? ?? ?? ??? ???? ???? ???? ? ?????. Prometheus? ??? ??? ????? ???? ? ??? ?? ?? ?? ?? ?? ?????. ? ?? ?? Prometheus? ???? Go ????? ?? ??? ?????? ??? ?? ??? ???? ???? ??? ?????.

Prometheus ?? ? ??

1. ???? Prometheus ??:

   wget https://github.com/prometheus/prometheus/releases/download/v2.39.3/prometheus-2.39.3.linux-amd64.tar.gz
   tar -xzvf prometheus-2.39.3.linux-amd64.tar.gz

2. Prometheus ??? ??:

   cd prometheus-2.39.3.linux-amd64
   ./prometheus

Prometheus ????? ??

1. Go ?????? Prometheus ?????? ?????:

   go get github.com/prometheus/client_golang/prometheus
   go get github.com/prometheus/client_golang/prometheus/promhttp

2. MetricsHandler ???:

   package main
   
   import (
    "log"
    "net/http"
    "time"
   
    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promhttp"
   )
   
   const (
    // RequestDuration defines the prometheus metric to track the time elapsed
    // for the handling of incoming requests
    RequestDuration = "http_server_request_duration_seconds"
   )
   
   var requestDuration = prometheus.NewHistogram(prometheus.HistogramOpts{
    Name: RequestDuration,
    Help: "HTTP server request duration in seconds.",
    Buckets: []float64{0.1, 0.3, 0.5, 0.75, 1},
   })
   
   func main() {
    // Register the RequestDuration metric
    prometheus.Register(requestDuration)
   
    // Create a new HTTP Server with a MetricsHandler
    http.Handle("/metrics", promhttp.Handler())
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        timer := prometheus.NewTimer(requestDuration.WithLabelValues(r.URL.Path))
        defer timer.ObserveDuration()
        time.Sleep(time.Millisecond * 100)
    })
   
    // Start the server
    log.Fatal(http.ListenAndServe(":8080", nil))
   }

3. Go ???? ??:

   go run main.go

?? ?? ???

1. Prometheus ? UI ??: http://localhost:9090
2. ??? "???" ?? ???? "http_server_request_duration_seconds" ????? ?????.

?? ??

• ?? ?? ???? ??? ??? ??? ?????.
• ??? ?? ?? ??? ???????.
• ????? ?? ??? ????? ?? ??? ?????.
• Grafana? ?? ??? ??? ???? ????? ????.

? ??? Golang ?? ?? ????? ?? ??? ?????? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!