add prometheus metrics

add logger from context
add router midleware
2025-11-24 11:19:38 +03:00 · 2025-11-24 11:08:27 +03:00 · 2025-11-24 10:43:57 +03:00 · 2025-11-24 10:33:44 +03:00
7 changed files with 277 additions and 4 deletions
--- a/cmd/observ.go
+++ b/cmd/observ.go
@@ -1,16 +1,60 @@
 package main

 import (
+	"context"
 	"net/http"
+	"time"

+	"git.mak-sim.ru/maksim/observability_2025/internal/logger"
+	"github.com/go-chi/chi/middleware"
 	"github.com/go-chi/chi/v5"
+	"github.com/juju/zaputil/zapctx"
+	"go.uber.org/zap"
+	"moul.io/chizap"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
 )

+func someFunc(ctx context.Context) {
+	logger := zapctx.Logger(ctx)
+	time.Sleep(1 * time.Second)
+	logger.Info("Hi from SomeFunc")
+}
+
 func main() {
+	logger, err := logger.GetLogger(false)
+	if err != nil {
+		panic(err)
+	}
 	r := chi.NewRouter()

-	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
-		w.Write([]byte("welcome")) //nolint:errcheck
+	logger = logger.With(zap.Any("someKey", "someValue"))
+
+	r.Use(middleware.RequestID)
+	r.Use(chizap.New(logger, &chizap.Opts{
+		WithReferer:   true,
+		WithUserAgent: true,
+	}))
+
+	counter := promauto.NewCounter(prometheus.CounterOpts{
+		Namespace: "teta", Name: "testcounter", Help: "Main endpoint request counter",
 	})
+
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		counter.Inc()
+		ctx := zapctx.WithLogger(r.Context(), logger)
+		someFunc(ctx)
+		_, err := w.Write([]byte("welcome"))
+		if err != nil {
+			logger.Error("Error writing response", zap.Error(err))
+		}
+	})
+
+	http.Handle("/metrics", promhttp.Handler())
+	go http.ListenAndServe(":9000", nil) //nolint:errcheck
+
+	logger.Info("Server started")
 	http.ListenAndServe(":8080", r) //nolint:errcheck
-}
+}
--- a/deployment/compose.yml
+++ b/deployment/compose.yml
@@ -0,0 +1,25 @@
+services:
+  prometheus:
+    image: prom/prometheus
+    container_name: prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+    ports:
+      - 9090:9090
+    restart: unless-stopped
+    volumes:
+      - ./prometheus:/etc/prometheus
+      - prom_data:/prometheus
+  grafana:
+    image: grafana/grafana
+    container_name: grafana
+    ports:
+      - 3000:3000
+    restart: unless-stopped
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - GF_SECURITY_ADMIN_PASSWORD=grafana
+    volumes:
+      - ./grafana:/etc/grafana/provisioning/datasources
+volumes:
+  prom_data:
--- a/deployment/grafana/datasource.yml
+++ b/deployment/grafana/datasource.yml
@@ -0,0 +1,9 @@
+apiVersion: 1
+
+datasources:
+- name: Prometheus
+  type: prometheus
+  url: http://prometheus:9090 
+  isDefault: true
+  access: proxy
+  editable: true
--- a/deployment/prometheus/prometheus.yml
+++ b/deployment/prometheus/prometheus.yml
@@ -0,0 +1,39 @@
+global:
+  scrape_interval: 5s
+  scrape_timeout: 4s
+  evaluation_interval: 15s
+alerting:
+  alertmanagers:
+  - static_configs:
+    - targets: []
+    scheme: http
+    timeout: 10s
+    api_version: v2
+scrape_configs:
+- job_name: prometheus
+  honor_timestamps: true
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  metrics_path: /metrics
+  scheme: http
+  static_configs:
+  - targets:
+    - localhost:9090
+- job_name: grafana
+  honor_timestamps: true
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  metrics_path: /metrics
+  scheme: http
+  static_configs:
+  - targets:
+    - grafana:3000
+- job_name: ourApp
+  honor_timestamps: true
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  metrics_path: /metrics
+  scheme: http
+  static_configs:
+  - targets:
+    - 10.216.0.1:9000
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,24 @@ module git.mak-sim.ru/maksim/observability_2025

 go 1.24.1

-require github.com/go-chi/chi/v5 v5.2.3
+require (
+	github.com/go-chi/chi v1.5.5
+	github.com/go-chi/chi/v5 v5.2.3
+	github.com/juju/zaputil v0.0.0-20190326175239-ef53049637ac
+	github.com/prometheus/client_golang v1.23.2
+	go.uber.org/zap v1.27.1
+	moul.io/chizap v1.0.3
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.66.1 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
+	go.uber.org/multierr v1.10.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	google.golang.org/protobuf v1.36.8 // indirect
+)
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,127 @@
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+google.golang.org/protobuf v1.36.8/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/errgo.v1 v1.0.0/go.mod h1:CxwszS/Xz1C49Ucd2i6Zil5UToP1EmyrFhKaMVbg1mk=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+moul.io/chizap v1.0.3 h1:mliXvvuS5HVo3QP8qPXczWtRM5dQ9UmK3bBVIkZo6ek=
+moul.io/chizap v1.0.3/go.mod h1:pq4R9kGLwz4XjBc4hodQYuoE7Yc9RUabLBFyyi2uErk=
--- a/internal/logger/logger.go
+++ b/internal/logger/logger.go
@@ -0,0 +1,11 @@
+package logger
+
+import "go.uber.org/zap"
+
+func GetLogger(debug bool) (*zap.Logger, error) {
+	if debug {
+		return zap.NewDevelopment()
+	} else {
+		return zap.NewProduction()
+	}
+}
Author	SHA1	Message	Date
Maksim Syomochkin	a8d762668b	add prometheus metrics	2025-11-24 11:19:38 +03:00
Maksim Syomochkin	4cb45956fa	add logger from context	2025-11-24 11:08:27 +03:00
Maksim Syomochkin	56f9407d23	add router midleware	2025-11-24 10:43:57 +03:00
Maksim Syomochkin	22d4eb71a4	add logger	2025-11-24 10:33:44 +03:00