fix cartservice listen addr

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

kubernetes-manifests/cartservice.yaml

@@ -18,6 +18,8 @@ spec:
           value: "redis-cart:6379"
         - name: CART_SERVICE_PORT
           value: "7070"
+        - name: CART_SERVICE_ADDR
+          value: "127.0.0.1"
         resources:
           requests:
             cpu: 200m

src/frontend/rpc.go

@@ -77,7 +77,7 @@ func (fe *frontendServer) convertCurrency(ctx context.Context, money *pb.Money,
 }
 
 func (fe *frontendServer) getShippingQuote(ctx context.Context, items []*pb.CartItem, currency string) (*pb.Money, error) {
-	quote, err := pb.NewShippingServiceClient(fe.currencySvcConn).GetQuote(ctx,
+	quote, err := pb.NewShippingServiceClient(fe.shippingSvcConn).GetQuote(ctx,
 		&pb.GetQuoteRequest{
 			Address: nil,
 			Items:   items})