add tracing

cmd/observ.go

@@ -9,21 +9,47 @@ import (
 	"github.com/go-chi/chi/middleware"
 	"github.com/go-chi/chi/v5"
 	"github.com/juju/zaputil/zapctx"
+	"go.opentelemetry.io/otel"
 	"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"
 )
 
+const (
+	TRACER_NAME = "go_test"
+)
+
+var tracer = otel.Tracer(TRACER_NAME)
+
 func someFunc(ctx context.Context) {
+	_, span := tracer.Start(ctx, "someFunc")
+	defer span.End()
+
 	logger := zapctx.Logger(ctx)
 	time.Sleep(1 * time.Second)
 	logger.Info("Hi from SomeFunc")
 }
 
 func main() {
+	ctx := context.Background()
 	logger, err := logger.GetLogger(false)
 	if err != nil {
 		panic(err)
 	}
+
+	shutdown, err := InstallExportPipeline()
+	if err != nil {
+		logger.Fatal(err.Error())
+	}
+	defer func() {
+		if err := shutdown(ctx); err != nil {
+			logger.Fatal(err.Error())
+		}
+	}()
+
 	r := chi.NewRouter()
 
 	logger = logger.With(zap.Any("someKey", "someValue"))
@@ -34,8 +60,15 @@ func main() {
 		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) {
-		ctx := zapctx.WithLogger(r.Context(), logger)
+		ctxLocal, span := tracer.Start(r.Context(), "main")
+		defer span.End()
+		counter.Inc()
+		ctx := zapctx.WithLogger(ctxLocal, logger)
 		someFunc(ctx)
 		_, err := w.Write([]byte("welcome"))
 		if err != nil {
@@ -43,6 +76,9 @@ func main() {
 		}
 	})
 
+	http.Handle("/metrics", promhttp.Handler())
+	go http.ListenAndServe(":9000", nil) //nolint:errcheck
+
 	logger.Info("Server started")
 	http.ListenAndServe(":8080", r) //nolint:errcheck
 }

cmd/otel.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"time"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+	"go.opentelemetry.io/otel/propagation"
+	"go.opentelemetry.io/otel/sdk/resource"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+)
+
+func InstallExportPipeline() (func(context.Context) error, error) {
+	traceClient := otlptracegrpc.NewClient(
+		otlptracegrpc.WithInsecure(),
+		otlptracegrpc.WithEndpoint("127.0.0.1:4317"),
+	)
+	sctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	traceExp, err := otlptrace.New(sctx, traceClient)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("creating stdout exporter: %w", err)
+	}
+
+	res, err := resource.New(context.Background(),
+		resource.WithFromEnv(),
+		resource.WithProcess(),
+		resource.WithTelemetrySDK(),
+		resource.WithHost(),
+		resource.WithAttributes(
+			semconv.ServiceNameKey.String("go_test"),
+		),
+	)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	tracerProvider := sdktrace.NewTracerProvider(
+		sdktrace.WithBatcher(traceExp),
+		sdktrace.WithResource(res),
+	)
+	otel.SetTracerProvider(tracerProvider)
+	otel.SetTextMapPropagator(propagation.TraceContext{})
+
+	return tracerProvider.Shutdown, nil
+}

deployment/compose.yml

@@ -0,0 +1,49 @@
+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
+
+  otel-collector:
+    image: otel/opentelemetry-collector:latest
+    container_name: otel-collector
+    command: ["--config=/etc/otel-collector-config.yaml"]
+    volumes:
+      - ./otel/otel-collector-config.yaml:/etc/otel-collector-config.yaml
+    ports:
+      - "4317:4317"  # OTLP gRPC receiver
+    depends_on:
+      - jaeger
+
+  jaeger:
+    image: jaegertracing/all-in-one:latest
+    container_name: jaeger
+    environment:
+      - COLLECTOR_OTLP_ENABLED=true
+      - COLLECTOR_OTLP_GRPC_HOST-PORT=:4317
+      - COLLECTOR_OTLP_GRPC_HOST_PORT=:4317
+    ports:
+      - "16686:16686"
+      # - "4317:4317"
+
+volumes:
+  prom_data:

deployment/grafana/datasource.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+
+datasources:
+- name: Prometheus
+  type: prometheus
+  url: http://prometheus:9090 
+  isDefault: true
+  access: proxy
+  editable: true
+- name: Jaeger
+  type: jaeger
+  url: http://jaeger:16686

deployment/otel/otel-collector-config.yaml

@@ -0,0 +1,19 @@
+receivers:
+  otlp:
+    protocols:
+      grpc:
+        endpoint: 0.0.0.0:4317
+processors:
+exporters:
+  otlp:
+    endpoint: "http://jaeger:4317"
+    tls:
+      insecure: true
+  debug:
+    verbosity: detailed
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      processors: []
+      exporters: [otlp]

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

go.mod

@@ -5,11 +5,39 @@ go 1.24.1
 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.opentelemetry.io/otel v1.38.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0
+	go.opentelemetry.io/otel/sdk v1.38.0
 	go.uber.org/zap v1.27.1
 	moul.io/chizap v1.0.3
 )
 
 require (
-	github.com/juju/zaputil v0.0.0-20190326175239-ef53049637ac // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/go-logr/logr v1.4.3 // indirect
+	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // 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.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/otel/metric v1.38.0 // indirect
+	go.opentelemetry.io/otel/trace v1.38.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.7.1 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	golang.org/x/net v0.43.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250825161204-c5933d9347a5 // indirect
+	google.golang.org/grpc v1.75.0 // indirect
+	google.golang.org/protobuf v1.36.8 // indirect
 )

go.sum

@@ -1,38 +1,95 @@
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@@ -48,6 +105,8 @@ go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
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+go.yaml.in/yaml/v2 v2.4.2 h1:DzmwEr2rDGHl7lsFgAHxmNz/1NlQ7xLIrlN2h5d1eGI=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -60,6 +119,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
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 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -69,9 +130,13 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -80,8 +145,19 @@ golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
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