Feat: add telemetry

.gitignore

@@ -4,3 +4,4 @@ gralias
 store.json
 config.toml
 gralias.db
+traces.log

docker-compose.yml

@@ -0,0 +1,7 @@
+version: '3.8'
+services:
+  jaeger:
+    image: jaegertracing/all-in-one:latest
+    ports:
+      - "6831:6831/udp"
+      - "16686:16686"

go.mod

@@ -12,6 +12,19 @@ require (
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/felixge/httpsnoop v1.0.4 // 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/pmezard/go-difflib v1.0.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.62.0 // indirect
+	go.opentelemetry.io/otel v1.37.0 // indirect
+	go.opentelemetry.io/otel/exporters/jaeger v1.17.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0 // indirect
+	go.opentelemetry.io/otel/metric v1.37.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.37.0 // indirect
+	go.opentelemetry.io/otel/trace v1.37.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -4,8 +4,17 @@ github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg
 github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
+github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
+github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
 github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/jmoiron/sqlx v1.4.0 h1:1PLqN7S1UYp5t4SrVVnt4nUVNemrDAtxlulVe+Qgm3o=
 github.com/jmoiron/sqlx v1.4.0/go.mod h1:ZrZ7UsYB/weZdl2Bxg6jCRO9c3YHl8r3ahlKmRT4JLY=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
@@ -19,6 +28,24 @@ github.com/rs/xid v1.6.0 h1:fV591PaemRlL6JfRxGDEPl69wICngIQ3shQtzfy2gxU=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
+go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.62.0 h1:Hf9xI/XLML9ElpiHVDNwvqI0hIFlzV8dgIr35kV1kRU=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.62.0/go.mod h1:NfchwuyNoMcZ5MLHwPrODwUF1HWCXWrL31s8gSAdIKY=
+go.opentelemetry.io/otel v1.37.0 h1:9zhNfelUvx0KBfu/gb+ZgeAfAgtWrfHJZcAqFC228wQ=
+go.opentelemetry.io/otel v1.37.0/go.mod h1:ehE/umFRLnuLa/vSccNq9oS1ErUlkkK71gMcN34UG8I=
+go.opentelemetry.io/otel/exporters/jaeger v1.17.0 h1:D7UpUy2Xc2wsi1Ras6V40q806WM07rqoCWzXu7Sqy+4=
+go.opentelemetry.io/otel/exporters/jaeger v1.17.0/go.mod h1:nPCqOnEH9rNLKqH/+rrUjiMzHJdV1BlpKcTwRTyKkKI=
+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0 h1:SNhVp/9q4Go/XHBkQ1/d5u9P/U+L1yaGPoi0x+mStaI=
+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.37.0/go.mod h1:tx8OOlGH6R4kLV67YaYO44GFXloEjGPZuMjEkaaqIp4=
+go.opentelemetry.io/otel/metric v1.37.0 h1:mvwbQS5m0tbmqML4NqK+e3aDiO02vsf/WgbsdpcPoZE=
+go.opentelemetry.io/otel/metric v1.37.0/go.mod h1:04wGrZurHYKOc+RKeye86GwKiTb9FKm1WHtO+4EVr2E=
+go.opentelemetry.io/otel/sdk v1.37.0 h1:ItB0QUqnjesGRvNcmAcU0LyvkVyGJ2xftD29bWdDvKI=
+go.opentelemetry.io/otel/sdk v1.37.0/go.mod h1:VredYzxUvuo2q3WRcDnKDjbdvmO0sCzOvVAiY+yUkAg=
+go.opentelemetry.io/otel/trace v1.37.0 h1:HLdcFNbRQBE2imdSEgm/kwqmQj1Or1l/7bW6mxVK7z4=
+go.opentelemetry.io/otel/trace v1.37.0/go.mod h1:TlgrlQ+PtQO5XFerSPUYG0JSgGyryXewPGyayAWSBS0=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

main.go

@@ -6,6 +6,7 @@ import (
 	"gralias/crons"
 	"gralias/handlers"
 	"gralias/repos"
+	"gralias/telemetry"
 	"log/slog"
 	"net/http"
 	"os"
@@ -56,8 +57,11 @@ func getContentType(path string) string {
 
 func ListenToRequests(port string) *http.Server {
 	mux := http.NewServeMux()
+	var handler http.Handler = mux
+	handler = handlers.LogRequests(handlers.GetSession(handler))
+	handler = telemetry.OtelMiddleware(handler)
 	server := &http.Server{
-		Handler: handlers.LogRequests(handlers.GetSession(mux)),
+		Handler: handler,
 		Addr:    ":" + port,
 		// ReadTimeout:  time.Second * 5, // does this timeout conflict with sse connection?
 		WriteTimeout: 0, // sse streaming
@@ -96,6 +100,8 @@ func ListenToRequests(port string) *http.Server {
 }
 
 func main() {
+	shutdown := telemetry.InitTracer()
+	defer shutdown()
 	// Setup graceful shutdown
 	stop := make(chan os.Signal, 1)
 	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)

telemetry/telemetry.go

@@ -0,0 +1,59 @@
+package telemetry
+
+import (
+	"context"
+	"log"
+	"net/http"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/jaeger"
+	"go.opentelemetry.io/otel/sdk/resource"
+	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+// newJaegerExporter creates a new Jaeger exporter.
+func newJaegerExporter() (sdktrace.SpanExporter, error) {
+	return jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint("http://localhost:14268/api/traces")))
+}
+
+// NewTracerProvider creates a new tracer provider.
+func NewTracerProvider(exp sdktrace.SpanExporter) *sdktrace.TracerProvider {
+	res := resource.NewWithAttributes(
+		semconv.SchemaURL,
+		semconv.ServiceName("gralias"),
+		semconv.ServiceVersion("v0.1.0"),
+	)
+
+	tracerProvider := sdktrace.NewTracerProvider(
+		sdktrace.WithSampler(sdktrace.AlwaysSample()),
+		sdktrace.WithResource(res),
+		sdktrace.WithBatcher(exp),
+	)
+	return tracerProvider
+}
+
+// OtelMiddleware wraps the provided http.Handler with OpenTelemetry tracing.
+func OtelMiddleware(handler http.Handler) http.Handler {
+	return otelhttp.NewHandler(handler, "http.server")
+}
+
+func InitTracer() func() {
+	exp, err := newJaegerExporter()
+	if err != nil {
+		log.Fatalf("failed to create exporter: %v", err)
+	}
+
+	tp := NewTracerProvider(exp)
+	otel.SetTracerProvider(tp)
+
+	return func() {
+		if err := tp.Shutdown(context.Background()); err != nil {
+			log.Printf("Error shutting down tracer provider: %v", err)
+		}
+		if err := exp.Shutdown(context.Background()); err != nil {
+			log.Printf("Error shutting down exporter: %v", err)
+		}
+	}
+}