Merge pull request #1 from honeycombio/GetBaggageWorking

Get baggage working

src/checkoutservice/go.mod

@@ -3,25 +3,21 @@ module github.com/GoogleCloudPlatform/microservices-demo/src/checkoutservice
 go 1.15
 
 require (
-	cloud.google.com/go v0.40.0
-	github.com/golang/protobuf v1.3.1
-	github.com/google/pprof v0.0.0-20190515194954-54271f7e092f // indirect
-	github.com/google/uuid v1.1.1
+	cloud.google.com/go v0.56.0
+	github.com/golang/protobuf v1.4.3
+	github.com/google/uuid v1.1.2
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/sirupsen/logrus v1.4.2
 	github.com/uber/jaeger-client-go v2.21.1+incompatible // indirect
-	go.opencensus.io v0.21.0
-	golang.org/x/net v0.0.0-20190628185345-da137c7871d7
-	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb // indirect
+	go.opencensus.io v0.22.3
+	go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.19.0
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.19.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.19.0
+	go.opentelemetry.io/otel v0.19.0
+	go.opentelemetry.io/otel/exporters/otlp v0.19.0
+	go.opentelemetry.io/otel/sdk v0.19.0
+	go.opentelemetry.io/otel/trace v0.19.0
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974
 	google.golang.org/api v0.29.0 // indirect
-	google.golang.org/appengine v1.6.1 // indirect
-	google.golang.org/genproto v0.0.0-20190708153700-3bdd9d9f5532 // indirect
-	google.golang.org/grpc v1.35.0
-	go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.17.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.17.0
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.17.0
-	go.opentelemetry.io/otel v0.17.0
-	go.opentelemetry.io/otel/exporters/otlp v0.17.0
-	go.opentelemetry.io/otel/sdk v0.17.0
-	go.opentelemetry.io/otel/trace v0.17.0
+	google.golang.org/grpc v1.36.0
 )

src/checkoutservice/main.go

@@ -25,12 +25,15 @@ import (
 	"github.com/sirupsen/logrus"
 	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/baggage"
 	"go.opentelemetry.io/otel/exporters/otlp"
 	"go.opentelemetry.io/otel/exporters/otlp/otlpgrpc"
 	"go.opentelemetry.io/otel/propagation"
 	"go.opentelemetry.io/otel/sdk/resource"
 	"go.opentelemetry.io/otel/sdk/trace"
 	"go.opentelemetry.io/otel/semconv"
+	tracebg "go.opentelemetry.io/otel/trace"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
@@ -97,10 +100,10 @@ func initOtelTracing(log logrus.FieldLogger) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	otel.SetTextMapPropagator(propagation.TraceContext{})
+	propagator := propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{})
+	otel.SetTextMapPropagator(propagator)
 	otel.SetTracerProvider(
 		trace.NewTracerProvider(
-			trace.WithConfig(trace.Config{DefaultSampler: trace.AlwaysSample()}),
 			trace.WithSpanProcessor(trace.NewBatchSpanProcessor(exporter)),
 			trace.WithResource(resource.NewWithAttributes(
 				semconv.ServiceNameKey.String("checkout"),
@@ -171,6 +174,19 @@ func (cs *checkoutService) PlaceOrder(ctx context.Context, req *pb.PlaceOrderReq
 	log.Infof("[PlaceOrder] user_id=%q user_currency=%q", req.UserId, req.UserCurrency)
 
 	orderID, err := uuid.NewUUID()
+
+	var (
+		sessionIDKey = attribute.Key("sessionid")
+		orderIDKey   = attribute.Key("orderid")
+	)
+
+	v := baggage.Value(ctx, sessionIDKey)
+	sessionID := v.AsString()
+
+	ctx = baggage.ContextWithValues(ctx, orderIDKey.String(orderID.String()))
+	span := tracebg.SpanFromContext(ctx)
+	span.SetAttributes(sessionIDKey.String(sessionID), orderIDKey.String(orderID.String()))
+
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed to generate order uuid")
 	}

src/frontend/go.mod

@@ -6,23 +6,23 @@ require (
 	cloud.google.com/go v0.56.0
 	contrib.go.opencensus.io/exporter/jaeger v0.2.0
 	contrib.go.opencensus.io/exporter/stackdriver v0.5.0
-	github.com/golang/protobuf v1.4.2
+	github.com/golang/protobuf v1.4.3
 	github.com/google/uuid v1.1.2
 	github.com/gorilla/mux v1.8.0
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/pkg/errors v0.8.1
 	github.com/sirupsen/logrus v1.4.2
 	github.com/uber/jaeger-client-go v2.21.1+incompatible // indirect
 	go.opencensus.io v0.22.3
-	go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.17.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.17.0
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.17.0
-	go.opentelemetry.io/otel v0.17.0
-	go.opentelemetry.io/otel/exporters/otlp v0.17.0
-	go.opentelemetry.io/otel/sdk v0.17.0
-	go.opentelemetry.io/otel/trace v0.17.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.19.0
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.19.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.19.0
+	go.opentelemetry.io/otel v0.19.0
+	go.opentelemetry.io/otel/exporters/otlp v0.19.0
+	go.opentelemetry.io/otel/sdk v0.19.0
+	go.opentelemetry.io/otel/trace v0.19.0
 	golang.org/x/net v0.0.0-20201021035429-f5854403a974
 	google.golang.org/api v0.29.0
-	google.golang.org/grpc v1.35.0
+	google.golang.org/grpc v1.36.0
 
 )

src/frontend/go.sum

@@ -77,6 +77,8 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -86,6 +88,7 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/martian v2.1.0+incompatible h1:/CP5g8u/VJHijgedC/Legn3BAbAaWPgecwXBIDzw5no=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
@@ -146,26 +149,52 @@ go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opentelemetry.io v0.1.0 h1:EANZoRCOP+A3faIlw/iN6YEWoYb1vleZRKm1EvH8T48=
 go.opentelemetry.io/contrib v0.17.0 h1:F9qs5F/A+BF7wvN9pXNHs67bsEyq0cCCwockpVJ1URk=
 go.opentelemetry.io/contrib v0.17.0/go.mod h1:G/EtFaa6qaN7+LxqfIAT3GiZa7Wv5DTBUzl5H4LY0Kc=
+go.opentelemetry.io/contrib v0.19.0 h1:x6Josyb/V+aDHg6IozzmZMaOhE+0Jb2NvEAM4/0Gftc=
+go.opentelemetry.io/contrib v0.19.0/go.mod h1:G/EtFaa6qaN7+LxqfIAT3GiZa7Wv5DTBUzl5H4LY0Kc=
 go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.17.0 h1:PeEGnH2KnFQg/91MbxyDitwJYcKe7LzDmUaNEilfSlE=
 go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.17.0/go.mod h1:CBgvL+tLQadhPvM+0egfGaUCBwTwlwPtGo6c0iDYSw0=
+go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.19.0 h1:QdGmjGP9SFqMrBpNNFlHFRBjAPtcrGb0Clfe6jJkA/I=
+go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux v0.19.0/go.mod h1:ze4w2zyQP+FvZjaahHaUVD7h4razLhDOsZD3qFKXc3c=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.17.0 h1:0mUDF2LbwX91ifi4pKM9KGj3GzdBoomkWMK03ZC3GOs=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.17.0/go.mod h1:N0jy1PN5H1oSGlyT8jODs2XuP6TRLnaf47QUj8GM5Po=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.19.0 h1:zekwSWkeZPKiEQo3tl82RVryxARMXbazgG6pLPzKgn0=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.19.0/go.mod h1:7wygtVHuEK+CYnKcZXn2/FNFW+xPMW0p9BcBXI7NzlU=
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.17.0/go.mod h1:c4YsdmxKHUj2fAHJQDQNtjG/+fGa4DcUNe+hdFgDjcE=
+go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.19.0/go.mod h1:7RDsakVbjb124lYDEjKuHTuzdqf04hLMEvPv/ufmqMs=
 go.opentelemetry.io/contrib/propagators v0.17.0/go.mod h1:b5jP8CtexBTADTeieiUpqQ/SV1IblFEIQYTNvmQavyc=
+go.opentelemetry.io/contrib/propagators v0.19.0/go.mod h1:4QOdZClXISU5S43xZxk5tYaWcpb+lehqfKtE6PK6msE=
 go.opentelemetry.io/otel v0.17.0 h1:6MKOu8WY4hmfpQ4oQn34u6rYhnf2sWf1LXYO/UFm71U=
 go.opentelemetry.io/otel v0.17.0/go.mod h1:Oqtdxmf7UtEvL037ohlgnaYa1h7GtMh0NcSd9eqkC9s=
+go.opentelemetry.io/otel v0.19.0 h1:Lenfy7QHRXPZVsw/12CWpxX6d/JkrX8wrx2vO8G80Ng=
+go.opentelemetry.io/otel v0.19.0/go.mod h1:j9bF567N9EfomkSidSfmMwIwIBuP37AMAIzVW85OxSg=
 go.opentelemetry.io/otel/exporters/otlp v0.17.0 h1:XLRaBlDNyLY+QlE4CDIJG+p90grYxNznbufFGphqJtE=
 go.opentelemetry.io/otel/exporters/otlp v0.17.0/go.mod h1:yf9oXQ8NaX2VgZmRvJjdYG+M4nVRdCBwxTeLGACg0c8=
+go.opentelemetry.io/otel/exporters/otlp v0.19.0 h1:ez8agFGbFJJgBU9H3lfX0rxWhZlXqurgZKL4aDcOdqY=
+go.opentelemetry.io/otel/exporters/otlp v0.19.0/go.mod h1:MY1xDqVxZmOlEYbMxUHLbg0uKlnmg4XSC6Qvh6XmPZk=
 go.opentelemetry.io/otel/metric v0.17.0 h1:t+5EioN8YFXQ2EH+1j6FHCKMUj+57zIDSnSGr/mWuug=
 go.opentelemetry.io/otel/metric v0.17.0/go.mod h1:hUz9lH1rNXyEwWAhIWCMFWKhYtpASgSnObJFnU26dJ0=
+go.opentelemetry.io/otel/metric v0.19.0 h1:dtZ1Ju44gkJkYvo+3qGqVXmf88tc+a42edOywypengg=
+go.opentelemetry.io/otel/metric v0.19.0/go.mod h1:8f9fglJPRnXuskQmKpnad31lcLJ2VmNNqIsx/uIwBSc=
 go.opentelemetry.io/otel/oteltest v0.17.0/go.mod h1:JT/LGFxPwpN+nlsTiinSYjdIx3hZIGqHCpChcIZmdoE=
+go.opentelemetry.io/otel/oteltest v0.19.0/go.mod h1:tI4yxwh8U21v7JD6R3BcA/2+RBoTKFexE/PJ/nSO7IA=
 go.opentelemetry.io/otel/sdk v0.17.0 h1:eHXQwanmbtSHM/GcJYbJ8FyyH/sT9a0e+1Z9ZWkF7Ug=
 go.opentelemetry.io/otel/sdk v0.17.0/go.mod h1:INs1PePjjF2hf842AXsxGTe5lH023QfLTZRFPiV/RUk=
+go.opentelemetry.io/otel/sdk v0.19.0 h1:13pQquZyGbIvGxBWcVzUqe8kg5VGbTBiKKKXpYCylRM=
+go.opentelemetry.io/otel/sdk v0.19.0/go.mod h1:ouO7auJYMivDjywCHA6bqTI7jJMVQV1HdKR5CmH8DGo=
 go.opentelemetry.io/otel/sdk/export/metric v0.17.0 h1:RKOa26LDq4JBRwUnWwY64ccc27v1rA20z0q71aq4WFs=
 go.opentelemetry.io/otel/sdk/export/metric v0.17.0/go.mod h1:G9SxRFvGmGpdmJ8TEXnTEnnRuR5p3cg/tRvWkA/XHvo=
+go.opentelemetry.io/otel/sdk/export/metric v0.19.0 h1:9A1PC2graOx3epRLRWbq4DPCdpMUYK8XeCrdAg6ycbI=
+go.opentelemetry.io/otel/sdk/export/metric v0.19.0/go.mod h1:exXalzlU6quLTXiv29J+Qpj/toOzL3H5WvpbbjouTBo=
 go.opentelemetry.io/otel/sdk/metric v0.17.0/go.mod h1:zAX55SrmDMpZwfQrz1PKIPbCP5beU+JPQTfNko01deo=
+go.opentelemetry.io/otel/sdk/metric v0.19.0/go.mod h1:t12+Mqmj64q1vMpxHlCGXGggo0sadYxEG6U+Us/9OA4=
 go.opentelemetry.io/otel/trace v0.17.0 h1:SBOj64/GAOyWzs5F680yW1ITIfJkm6cJWL2YAvuL9xY=
 go.opentelemetry.io/otel/trace v0.17.0/go.mod h1:bIujpqg6ZL6xUTubIUgziI1jSaUPthmabA/ygf/6Cfg=
+go.opentelemetry.io/otel/trace v0.19.0 h1:1ucYlenXIDA1OlHVLDZKX0ObXV5RLaq06DtUKz5e5zc=
+go.opentelemetry.io/otel/trace v0.19.0/go.mod h1:4IXiNextNOpPnRlI4ryK69mn5iC84bjBWZQA5DXz/qg=
+go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -286,6 +315,7 @@ golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -363,6 +393,8 @@ google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
 google.golang.org/grpc v1.35.0 h1:TwIQcH3es+MojMVojxxfQ3l3OF2KzlRxML2xZq0kRo8=
 google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.36.0 h1:o1bcQ6imQMIOpdrO3SWf2z5RV72WbDwdXuK0MDlc8As=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=

src/frontend/handlers.go

@@ -28,6 +28,9 @@ import (
 	"github.com/gorilla/mux"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/baggage"
+	"go.opentelemetry.io/otel/trace"
 
 	pb "github.com/GoogleCloudPlatform/microservices-demo/src/frontend/genproto"
 	"github.com/GoogleCloudPlatform/microservices-demo/src/frontend/money"
@@ -305,8 +308,22 @@ func (fe *frontendServer) placeOrderHandler(w http.ResponseWriter, r *http.Reque
 		ccCVV, _      = strconv.ParseInt(r.FormValue("credit_card_cvv"), 10, 32)
 	)
 
+	ctx := r.Context()
+
+	var (
+		sessionIDKey = attribute.Key("sessionid")
+		emailKey     = attribute.Key("email")
+		zipcodeKey   = attribute.Key("zipcode")
+		stateKey     = attribute.Key("state")
+		countryKey   = attribute.Key("country")
+	)
+
+	ctx = baggage.ContextWithValues(ctx, sessionIDKey.String(sessionID(r)))
+	span := trace.SpanFromContext(ctx)
+	span.SetAttributes(sessionIDKey.String(sessionID(r)), emailKey.String(email), zipcodeKey.Int64(zipCode), stateKey.String(state), countryKey.String(country))
+
 	order, err := pb.NewCheckoutServiceClient(fe.checkoutSvcConn).
-		PlaceOrder(r.Context(), &pb.PlaceOrderRequest{
+		PlaceOrder(ctx, &pb.PlaceOrderRequest{
 			Email: email,
 			CreditCard: &pb.CreditCardInfo{
 				CreditCardNumber:          ccNumber,

src/frontend/main.go

@@ -178,10 +178,11 @@ func initOtelTracing(log logrus.FieldLogger) {
 	if err != nil {
 		log.Fatal(err)
 	}
-	otel.SetTextMapPropagator(propagation.TraceContext{})
+	//otel.SetTextMapPropagator(propagation.TraceContext{})
+	propagator := propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{})
+	otel.SetTextMapPropagator(propagator)
 	otel.SetTracerProvider(
 		trace.NewTracerProvider(
-			trace.WithConfig(trace.Config{DefaultSampler: trace.AlwaysSample()}),
 			trace.WithSpanProcessor(trace.NewBatchSpanProcessor(exporter)),
 			trace.WithResource(resource.NewWithAttributes(
 				semconv.ServiceNameKey.String("frontend"),