From 3b3343bdb57831fe2041b0f77a54cb26066aaf32 Mon Sep 17 00:00:00 2001
From: Tim Wundenberg <tim@wundenbergs.de>
Date: Tue, 17 Jun 2025 13:20:13 +0200
Subject: [PATCH] fix(observabillity): set service.name resource on metrics and
 traces

---
 internal/otel.go | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/internal/otel.go b/internal/otel.go
index 67c45bf..eed14e1 100644
--- a/internal/otel.go
+++ b/internal/otel.go
@@ -59,7 +59,7 @@ func setupOTelSDK(ctx context.Context) (func(context.Context) error, error) {
 	}
 
 	// Set up trace provider.
-	tracerProvider, err := newTracerProvider(ctx)
+	tracerProvider, err := newTracerProvider(ctx, resources)
 	if err != nil {
 		handleErr(ctx, err)
 		return nil, err
@@ -68,7 +68,7 @@ func setupOTelSDK(ctx context.Context) (func(context.Context) error, error) {
 	otel.SetTracerProvider(tracerProvider)
 
 	// Set up meter provider.
-	meterProvider, err := newMeterProvider(ctx)
+	meterProvider, err := newMeterProvider(ctx, resources)
 	if err != nil {
 		handleErr(ctx, err)
 		return nil, err
@@ -95,7 +95,7 @@ func newPropagator() propagation.TextMapPropagator {
 	)
 }
 
-func newTracerProvider(ctx context.Context) (*trace.TracerProvider, error) {
+func newTracerProvider(ctx context.Context, resource *resource.Resource) (*trace.TracerProvider, error) {
 	exp, err := otlptracegrpc.New(
 		ctx,
 		otlptracegrpc.WithEndpoint(otelEndpoint),
@@ -105,10 +105,13 @@ func newTracerProvider(ctx context.Context) (*trace.TracerProvider, error) {
 		return nil, err
 	}
 
-	return trace.NewTracerProvider(trace.WithBatcher(exp)), nil
+	return trace.NewTracerProvider(
+		trace.WithBatcher(exp),
+		trace.WithResource(resource),
+	), nil
 }
 
-func newMeterProvider(ctx context.Context) (*metric.MeterProvider, error) {
+func newMeterProvider(ctx context.Context, resource *resource.Resource) (*metric.MeterProvider, error) {
 	exp, err := otlpmetricgrpc.New(
 		ctx,
 		otlpmetricgrpc.WithInsecure(),
@@ -118,9 +121,9 @@ func newMeterProvider(ctx context.Context) (*metric.MeterProvider, error) {
 	}
 
 	return metric.NewMeterProvider(
-		metric.WithReader(
-			metric.NewPeriodicReader(
-				exp, metric.WithInterval(15*time.Second)))), nil
+		metric.WithReader(metric.NewPeriodicReader(exp, metric.WithInterval(15*time.Second))),
+		metric.WithResource(resource),
+	), nil
 }
 
 func newLoggerProvider(ctx context.Context, resource *resource.Resource) (*log.LoggerProvider, error) {