Update OTLP exporters to use HTTP instead of gRPC

src/ad/Dockerfile

@@ -1,3 +1,6 @@
+# run from repo root
+# docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/tokaplan/demo-ad:1.0.0 --push -f ./src/ad/Dockerfile .
+
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
@@ -22,14 +25,14 @@ RUN ./gradlew installDist -PprotoSourceDir=./proto
 
 FROM eclipse-temurin:21-jre
 
-ARG OTEL_JAVA_AGENT_VERSION
-ARG _JAVA_OPTIONS
+# ARG OTEL_JAVA_AGENT_VERSION
+# ARG _JAVA_OPTIONS
 
 WORKDIR /usr/src/app/
 
 COPY --from=builder /usr/src/app/ ./
-ADD --chmod=644 https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$OTEL_JAVA_AGENT_VERSION/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
-ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
+# ADD --chmod=644 https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$OTEL_JAVA_AGENT_VERSION/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
+# ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
 
 EXPOSE ${AD_PORT}
 ENTRYPOINT [ "./build/install/opentelemetry-demo-ad/bin/Ad" ]

src/ad/build.gradle

@@ -48,7 +48,6 @@ dependencies {
                 "io.grpc:grpc-netty:${grpcVersion}",
                 "io.grpc:grpc-services:${grpcVersion}",
                 "io.opentelemetry:opentelemetry-api",
-                "io.opentelemetry:opentelemetry-sdk",
                 "io.opentelemetry.instrumentation:opentelemetry-instrumentation-annotations",
                 "org.apache.logging.log4j:log4j-core:2.25.2",
                 "dev.openfeature.contrib.providers:flagd:0.11.17",

src/ad/src/main/java/oteldemo/AdService.java

@@ -12,7 +12,6 @@
 import io.grpc.protobuf.services.*;
 import io.grpc.stub.StreamObserver;
 import io.opentelemetry.api.GlobalOpenTelemetry;
-import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.api.baggage.Baggage;
 import io.opentelemetry.api.common.AttributeKey;
 import io.opentelemetry.api.common.Attributes;

src/cart/src/Dockerfile

@@ -1,3 +1,6 @@
+# run from repo root
+# docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/tokaplan/demo-cart:1.0.0 --push -f ./src/cart/src/Dockerfile .
+
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 # Copyright 2021 Google LLC

src/cart/src/Program.cs

@@ -18,6 +18,7 @@
 using OpenFeature;
 using OpenFeature.Hooks;
 using OpenFeature.Contrib.Providers.Flagd;
+using OpenTelemetry;
 
 var builder = WebApplication.CreateBuilder(args);
 string valkeyAddress = builder.Configuration["VALKEY_ADDR"];
@@ -27,9 +28,7 @@
     Environment.Exit(1);
 }
 
-builder.Logging
-    .AddOpenTelemetry(options => options.AddOtlpExporter())
-    .AddConsole();
+builder.Logging.AddConsole();
 
 builder.Services.AddSingleton<ICartStore>(x =>
 {
@@ -61,23 +60,22 @@
         .AddHostDetector();
 
 builder.Services.AddOpenTelemetry()
+    .UseOtlpExporter()
     .ConfigureResource(appResourceBuilder)
     .WithTracing(tracerBuilder => tracerBuilder
         .AddSource("OpenTelemetry.Demo.Cart")
         .AddRedisInstrumentation(
             options => options.SetVerboseDatabaseStatements = true)
         .AddAspNetCoreInstrumentation()
         .AddGrpcClientInstrumentation()
-        .AddHttpClientInstrumentation()
-        .AddOtlpExporter())
+        .AddHttpClientInstrumentation())
     .WithMetrics(meterBuilder => meterBuilder
         .AddMeter("OpenTelemetry.Demo.Cart")
         .AddMeter("OpenFeature")
         .AddProcessInstrumentation()
         .AddRuntimeInstrumentation()
         .AddAspNetCoreInstrumentation()
-        .SetExemplarFilter(ExemplarFilterType.TraceBased)
-        .AddOtlpExporter());
+        .SetExemplarFilter(ExemplarFilterType.TraceBased));
 builder.Services.AddGrpc();
 builder.Services.AddGrpcHealthChecks()
     .AddCheck("Sample", () => HealthCheckResult.Healthy());

src/cart/src/cart.csproj

@@ -16,19 +16,19 @@
 
   <ItemGroup>
     <!-- Keeping Grpc.AspNetCore* to 2.67 due to https://github.com/grpc/grpc/issues/38538 -->
-    <PackageReference Include="Grpc.AspNetCore" Version="2.67.0" />
-    <PackageReference Include="Grpc.AspNetCore.HealthChecks" Version="2.67.0" />
-    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.11.2" />
-    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.11.2" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.11.1" />
+    <PackageReference Include="Grpc.AspNetCore" Version="2.71.0" />
+    <PackageReference Include="Grpc.AspNetCore.HealthChecks" Version="2.71.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.13.1" />
+    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.13.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.13.0" />
     <PackageReference Include="OpenTelemetry.Instrumentation.GrpcNetClient" Version="1.11.0-beta.2" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.11.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.13.0" />
     <PackageReference Include="OpenTelemetry.Instrumentation.Process" Version="1.11.0-beta.2" />
     <PackageReference Include="OpenTelemetry.Instrumentation.StackExchangeRedis" Version="1.11.0-beta.2" />
-    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.11.1" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.13.0" />
     <PackageReference Include="OpenTelemetry.Resources.Container" Version="1.11.0-beta.2" />
     <PackageReference Include="OpenTelemetry.Resources.Host" Version="1.11.0-beta.2" />
-    <PackageReference Include="StackExchange.Redis" Version="2.8.31" />
+    <PackageReference Include="StackExchange.Redis" Version="2.9.32" />
     <PackageReference Include="OpenFeature.Contrib.Providers.Flagd" Version="0.3.4" />
     <PackageReference Include="OpenFeature" Version="2.9.0" />
     <PackageReference Include="OpenFeature.Hosting" Version="2.9.0" />

src/checkout/Dockerfile

@@ -1,3 +1,6 @@
+# run from repo root
+# docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/tokaplan/demo-checkout:1.0.0 --push -f ./src/checkout/Dockerfile .
+
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 

src/checkout/go.mod

@@ -13,9 +13,9 @@ require (
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0
 	go.opentelemetry.io/contrib/instrumentation/runtime v0.63.0
 	go.opentelemetry.io/otel v1.38.0
-	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.14.0
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.38.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.38.0
 	go.opentelemetry.io/otel/log v0.14.0
 	go.opentelemetry.io/otel/sdk v1.38.0
 	go.opentelemetry.io/otel/sdk/log v0.14.0

src/checkout/go.sum

@@ -129,14 +129,14 @@ go.opentelemetry.io/contrib/instrumentation/runtime v0.63.0 h1:PeBoRj6af6xMI7qCu
 go.opentelemetry.io/contrib/instrumentation/runtime v0.63.0/go.mod h1:ingqBCtMCe8I4vpz/UVzCW6sxoqgZB37nao91mLQ3Bw=
 go.opentelemetry.io/otel v1.38.0 h1:RkfdswUDRimDg0m2Az18RKOsnI8UDzppJAtj01/Ymk8=
 go.opentelemetry.io/otel v1.38.0/go.mod h1:zcmtmQ1+YmQM9wrNsTGV/q/uyusom3P8RxwExxkZhjM=
-go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0 h1:OMqPldHt79PqWKOMYIAQs3CxAi7RLgPxwfFSwr4ZxtM=
-go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0/go.mod h1:1biG4qiqTxKiUCtoWDPpL3fB3KxVwCiGw81j3nKMuHE=
-go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0 h1:vl9obrcoWVKp/lwl8tRE33853I8Xru9HFbw/skNeLs8=
-go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0/go.mod h1:GAXRxmLJcVM3u22IjTg74zWBrRCKq8BnOqUVLodpcpw=
+go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.14.0 h1:QQqYw3lkrzwVsoEX0w//EhH/TCnpRdEenKBOOEIMjWc=
+go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.14.0/go.mod h1:gSVQcr17jk2ig4jqJ2DX30IdWH251JcNAecvrqTxH1s=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.38.0 h1:Oe2z/BCg5q7k4iXC3cqJxKYg0ieRiOqF0cecFYdPTwk=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.38.0/go.mod h1:ZQM5lAJpOsKnYagGg/zV2krVqTtaVdYdDkhMoX6Oalg=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0 h1:GqRJVj7UmLjCVyVJ3ZFLdPRmhDUp2zFmQe3RHIOsw24=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.38.0/go.mod h1:ri3aaHSmCTVYu2AWv44YMauwAQc0aqI9gHKIcSbI1pU=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0 h1:lwI4Dc5leUqENgGuQImwLo4WnuXFPetmPpkLi2IrX54=
-go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0/go.mod h1:Kz/oCE7z5wuyhPxsXDuaPteSWqjSBD5YaSdbxZYGbGk=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.38.0 h1:aTL7F04bJHUlztTsNGJ2l+6he8c+y/b//eR0jjjemT4=
+go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.38.0/go.mod h1:kldtb7jDTeol0l3ewcmd8SDvx3EmIE7lyvqbasU3QC4=
 go.opentelemetry.io/otel/log v0.14.0 h1:2rzJ+pOAZ8qmZ3DDHg73NEKzSZkhkGIua9gXtxNGgrM=
 go.opentelemetry.io/otel/log v0.14.0/go.mod h1:5jRG92fEAgx0SU/vFPxmJvhIuDU9E1SUnEQrMlJpOno=
 go.opentelemetry.io/otel/metric v1.38.0 h1:Kl6lzIYGAh5M159u9NgiRkmoMKjvbsKtYRwgfrA6WpA=

src/checkout/main.go

@@ -35,9 +35,9 @@ import (
 	"go.opentelemetry.io/contrib/instrumentation/runtime"
 	"go.opentelemetry.io/otel"
 	otelcodes "go.opentelemetry.io/otel/codes"
-	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
-	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
-	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
+	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
 	"go.opentelemetry.io/otel/propagation"
 
 	sdklog "go.opentelemetry.io/otel/sdk/log"
@@ -87,9 +87,9 @@ func initResource() *sdkresource.Resource {
 func initTracerProvider() *sdktrace.TracerProvider {
 	ctx := context.Background()
 
-	exporter, err := otlptracegrpc.New(ctx)
+	exporter, err := otlptracehttp.New(ctx)
 	if err != nil {
-		logger.Error(fmt.Sprintf("new otlp trace grpc exporter failed: %v", err))
+		logger.Error(fmt.Sprintf("new otlp trace http exporter failed: %v", err))
 	}
 	tp := sdktrace.NewTracerProvider(
 		sdktrace.WithBatcher(exporter),
@@ -103,9 +103,9 @@ func initTracerProvider() *sdktrace.TracerProvider {
 func initMeterProvider() *sdkmetric.MeterProvider {
 	ctx := context.Background()
 
-	exporter, err := otlpmetricgrpc.New(ctx)
+	exporter, err := otlpmetrichttp.New(ctx)
 	if err != nil {
-		logger.Error(fmt.Sprintf("new otlp metric grpc exporter failed: %v", err))
+		logger.Error(fmt.Sprintf("new otlp metric http exporter failed: %v", err))
 	}
 
 	mp := sdkmetric.NewMeterProvider(
@@ -119,7 +119,7 @@ func initMeterProvider() *sdkmetric.MeterProvider {
 func initLoggerProvider() *sdklog.LoggerProvider {
 	ctx := context.Background()
 
-	logExporter, err := otlploggrpc.New(ctx)
+	logExporter, err := otlploghttp.New(ctx)
 	if err != nil {
 		return nil
 	}

src/fraud-detection/Dockerfile

@@ -1,3 +1,6 @@
+# run from repo root
+# docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/tokaplan/demo-fraud-detection:1.0.0 --push -f ./src/fraud-detection/Dockerfile .
+
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
@@ -18,8 +21,8 @@ FROM gcr.io/distroless/java17-debian12:nonroot
 ARG OTEL_JAVA_AGENT_VERSION
 WORKDIR /usr/src/app/
 
-ADD --chmod=644 https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$OTEL_JAVA_AGENT_VERSION/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
-ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
+# ADD --chmod=644 https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v$OTEL_JAVA_AGENT_VERSION/opentelemetry-javaagent.jar /usr/src/app/opentelemetry-javaagent.jar
+# ENV JAVA_TOOL_OPTIONS=-javaagent:/usr/src/app/opentelemetry-javaagent.jar
 
 COPY --from=builder /usr/src/app/build/libs/fraud-detection-1.0-all.jar fraud-detection-1.0-all.jar
 

src/fraud-detection/build.gradle.kts

@@ -38,8 +38,6 @@ dependencies {
     implementation("io.grpc:grpc-netty:${grpcVersion}")
     implementation("io.grpc:grpc-services:${grpcVersion}")
     implementation("io.opentelemetry:opentelemetry-api:1.55.0")
-    implementation("io.opentelemetry:opentelemetry-sdk:1.55.0")
-    implementation("io.opentelemetry:opentelemetry-extension-annotations:1.18.0")
     implementation("org.apache.logging.log4j:log4j-core:2.25.2")
     implementation("org.slf4j:slf4j-api:2.0.17")
     implementation("com.google.protobuf:protobuf-kotlin:${protobufVersion}")

src/frontend/Dockerfile

@@ -1,3 +1,6 @@
+# run from repo root
+# docker buildx build --platform linux/amd64,linux/arm64 -t appmonitoring.azurecr.io/demo-frontend:1.0.0 --push -f ./src/frontend/Dockerfile .
+
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
@@ -53,8 +56,6 @@ COPY --from=deps /app/node_modules/ node_modules/
 
 COPY ./src/frontend/public/ public/
 
-COPY ./src/frontend/utils/telemetry/Instrumentation.js Instrumentation.js
-
 EXPOSE ${FRONTEND_PORT}
 
-CMD ["--require=./Instrumentation.js", "server.js"]
+CMD ["server.js"]

src/frontend/README.md

@@ -6,6 +6,41 @@ by two layers.
 1. Client side application. Which renders the components for the OTEL webstore.
 2. API layer. Connects the client to the backend services by exposing REST endpoints.
 
+## OpenTelemetry Instrumentation
+
+The frontend application has been configured to **not bundle the OpenTelemetry SDK**. Instead, it relies on external instrumentation attached at runtime via environment variables.
+
+### Server-Side (Node.js/Next.js)
+
+To enable OpenTelemetry on the Node.js server:
+
+**Option 1: Using environment variables**
+```shell
+export OTEL_SERVICE_NAME=frontend
+export OTEL_EXPORTER_OTLP_ENDPOINT=http://otel-collector:4318
+export OTEL_TRACES_EXPORTER=otlp
+export OTEL_METRICS_EXPORTER=otlp
+export OTEL_LOGS_EXPORTER=otlp
+npm run start
+```
+
+**Option 2: Using Node.js auto-instrumentation**
+```shell
+node --require @opentelemetry/auto-instrumentations-node/register server.js
+```
+
+**Option 3: Via Docker with environment variables**
+Set the environment variables in your `docker-compose.yml` or deployment configuration.
+
+### Client-Side (Browser)
+
+Browser-side instrumentation requires:
+- OpenTelemetry JavaScript SDK loaded via a `<script>` tag
+- Browser extension or RUM solution
+- Proxy-injected instrumentation
+
+The application uses OpenTelemetry API calls that will only emit signals when an external SDK is present.
+
 ## Build Locally
 
 By running `docker compose up` at the root of the project you'll have access to the

src/frontend/package.json

@@ -3,9 +3,9 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "NODE_OPTIONS='--require ./utils/telemetry/Instrumentation.js' next dev",
+    "dev": "next dev",
     "build": "next build",
-    "start": "node --require ./Instrumentation.js server.js",
+    "start": "node server.js",
     "lint": "next lint",
     "cy:open": "cypress open",
     "grpc:generate": "mkdir -p ./protos && protoc -I ./pb  --plugin=./node_modules/.bin/protoc-gen-ts_proto --ts_proto_opt=esModuleInterop=true --ts_proto_out=./protos --ts_proto_opt=outputServices=grpc-js demo.proto"

src/frontend/pages/_app.tsx

@@ -8,7 +8,6 @@ import CurrencyProvider from '../providers/Currency.provider';
 import CartProvider from '../providers/Cart.provider';
 import { ThemeProvider } from 'styled-components';
 import Theme from '../styles/Theme';
-import FrontendTracer from '../utils/telemetry/FrontendTracer';
 import SessionGateway from '../gateways/Session.gateway';
 import { OpenFeatureProvider, OpenFeature } from '@openfeature/react-sdk';
 import { FlagdWebProvider } from '@openfeature/flagd-web-provider';
@@ -25,7 +24,6 @@ declare global {
 }
 
 if (typeof window !== 'undefined') {
-  FrontendTracer();
   if (window.location) {
     const session = SessionGateway.getSession();