Add OTEL

main.go

@@ -12,12 +12,16 @@ import (
 	"context"
 	"os"
 	"os/signal"
+	"time"
 
 	"github.com/rs/zerolog"
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/codes"
 	"golang.org/x/sys/unix"
 
 	"gitea.libretechconsulting.com/rmcguire/go-http-server-with-otel/pkg/config"
 	"gitea.libretechconsulting.com/rmcguire/go-http-server-with-otel/pkg/logging"
+	"gitea.libretechconsulting.com/rmcguire/go-http-server-with-otel/pkg/observability"
 )
 
 func main() {
@@ -32,8 +36,27 @@ func main() {
 
 	cfg := config.MustFromCtx(ctx)
 	ctx = logging.MustInitLogging(ctx)
-
 	l := zerolog.Ctx(ctx)
+
+	// Set up OTEL
+	opts := make([]observability.Option, 0)
+	if cfg.Logging.Level == "trace" {
+		opts = append(opts, observability.EnableStdoutExporter)
+	}
+	shutdown := observability.Init(ctx, opts...)
+	defer func() {
+		shutdownCtx, cncl := context.WithTimeout(context.Background(), 30*time.Second)
+		defer cncl()
+		shutdown(shutdownCtx)
+	}()
+
+	// Begin Server init
+	tracer := otel.Tracer(cfg.Name)
+	_, initSpan := tracer.Start(ctx, "init")
+
+	// TODO: HTTP Server
+
+	// App Ready
 	l.Trace().Any("config", *cfg).Send()
 	l.Info().
 		Str("name", cfg.Name).
@@ -41,6 +64,9 @@ func main() {
 		Str("logLevel", cfg.Logging.Level).
 		Msg("app initialized")
 
+	initSpan.SetStatus(codes.Ok, "")
+	initSpan.End()
+
 	<-ctx.Done()
 }