ING-876: Fixed potential panic due to nil tracer.

cmd/gateway/main.go

@@ -25,13 +25,11 @@ import (
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 	"go.opentelemetry.io/otel/exporters/prometheus"
-	"go.opentelemetry.io/otel/metric"
 	"go.opentelemetry.io/otel/propagation"
 	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
 	"go.opentelemetry.io/otel/sdk/resource"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
-	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -105,8 +103,8 @@ func initTelemetry(
 	enableMetrics bool,
 	traceEverything bool,
 ) (
-	trace.TracerProvider,
-	metric.MeterProvider,
+	*sdktrace.TracerProvider,
+	*sdkmetric.MeterProvider,
 	error,
 ) {
 	res, err := resource.New(ctx,

go.mod

@@ -35,7 +35,6 @@ require (
 	go.opentelemetry.io/otel/metric v1.28.0
 	go.opentelemetry.io/otel/sdk v1.28.0
 	go.opentelemetry.io/otel/sdk/metric v1.28.0
-	go.opentelemetry.io/otel/trace v1.28.0
 	go.uber.org/zap v1.27.0
 	golang.org/x/exp v0.0.0-20240716175740-e3f259677ff7
 	golang.org/x/mod v0.19.0
@@ -82,6 +81,7 @@ require (
 	github.com/spf13/cast v1.6.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	go.etcd.io/etcd/client/pkg/v3 v3.5.14 // indirect
+	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect