Add resource detection to checkout service (open-telemetry#662)

CHANGELOG.md

@@ -166,5 +166,7 @@ significant modifications will be credited to OpenTelemetry Authors.
 ([#648](https://github.com/open-telemetry/opentelemetry-demo/pull/648))
 * Add Jaeger-SPM-Config
 ([#655](https://github.com/open-telemetry/opentelemetry-demo/pull/655))
+* Add resource detectors to checkout service
+([#662](https://github.com/open-telemetry/opentelemetry-demo/pull/662))
 * Add resource detectors to cart service
 ([#663](https://github.com/open-telemetry/opentelemetry-demo/pull/663))

docs/services/checkoutservice.md

@@ -22,6 +22,7 @@ func initTracerProvider() *sdktrace.TracerProvider {
     }
     tp := sdktrace.NewTracerProvider(
         sdktrace.WithBatcher(exporter),
+        sdktrace.WithResource(initResource()),
     )
     otel.SetTracerProvider(tp)
     otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))

src/checkoutservice/main.go

@@ -23,6 +23,7 @@ import (
 	"net/http"
 	"os"
 	"strconv"
+	"sync"
 	"time"
 
 	"go.opentelemetry.io/otel/attribute"
@@ -41,6 +42,7 @@ import (
 	"go.opentelemetry.io/otel/metric/global"
 	"go.opentelemetry.io/otel/propagation"
 	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
+	sdkresource "go.opentelemetry.io/otel/sdk/resource"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
@@ -56,6 +58,8 @@ import (
 
 var log *logrus.Logger
 var tracer trace.Tracer
+var resource *sdkresource.Resource
+var initResourcesOnce sync.Once
 
 func init() {
 	log = logrus.New()
@@ -71,6 +75,23 @@ func init() {
 	log.Out = os.Stdout
 }
 
+func initResource() *sdkresource.Resource {
+	initResourcesOnce.Do(func() {
+		extraResources, _ := sdkresource.New(
+			context.Background(),
+			sdkresource.WithOS(),
+			sdkresource.WithProcess(),
+			sdkresource.WithContainer(),
+			sdkresource.WithHost(),
+		)
+		resource, _ = sdkresource.Merge(
+			sdkresource.Default(),
+			extraResources,
+		)
+	})
+	return resource
+}
+
 func initTracerProvider() *sdktrace.TracerProvider {
 	ctx := context.Background()
 
@@ -80,6 +101,7 @@ func initTracerProvider() *sdktrace.TracerProvider {
 	}
 	tp := sdktrace.NewTracerProvider(
 		sdktrace.WithBatcher(exporter),
+		sdktrace.WithResource(initResource()),
 	)
 	otel.SetTracerProvider(tp)
 	otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
@@ -94,7 +116,10 @@ func initMeterProvider() *sdkmetric.MeterProvider {
 		log.Fatalf("new otlp metric grpc exporter failed: %v", err)
 	}
 
-	mp := sdkmetric.NewMeterProvider(sdkmetric.WithReader(sdkmetric.NewPeriodicReader(exporter)))
+	mp := sdkmetric.NewMeterProvider(
+		sdkmetric.WithReader(sdkmetric.NewPeriodicReader(exporter)),
+		sdkmetric.WithResource(initResource()),
+	)
 	global.SetMeterProvider(mp)
 	return mp
 }