chore(examples/mysql): modernize this example

- drop Jaeger from examples (given open-telemetry/opentelemetry-specification#3551)
- update otel-collector-contib version and switch from logging to debug exporter (lifted from open-telemetry#2441)
- various other small fixes to get the README steps basically working

examples/mysql/README.md

@@ -1,6 +1,6 @@
 # Overview
 
-OpenTelemetry MySQL Instrumentation allows the user to automatically collect trace data and metrics and export them to the backend of choice (we can use Zipkin, Jaeger or Grafana for this example), to give observability to distributed systems.
+OpenTelemetry MySQL Instrumentation allows the user to automatically collect trace data and metrics and export them to the backend of choice (we can use Zipkin or Grafana for this example), to give observability to distributed systems.
 
 This is a modification of the HTTP example that executes multiple parallel requests that interact with a MySQL server backend using the `mysql` npm module. The example displays traces using multiple connection methods.
 
@@ -20,13 +20,11 @@ npm install
 ```
 
 Setup [Zipkin Tracing](https://zipkin.io/pages/quickstart.html)
-or
-Setup [Jaeger Tracing](https://www.jaegertracing.io/docs/latest/getting-started/#all-in-one)
 
 In case you want to see also metrics:
 
 1. Go to `docker` folder
-2. Run `docker compose up`. This will set up Zipkin, Jaeger, otel collector, Prometheus and Grafana.
+2. Run `docker compose up`. This will set up Zipkin, otel collector, Prometheus and Grafana.
 3. To see your metrics, go to `http://localhost:3000/`.
 
 ## Run the Application
@@ -54,29 +52,6 @@ Go to Zipkin with your browser <http://localhost:9411/zipkin/traces/(your-trace-
 
 <p align="center"><img alt="Zipkin UI with trace" src="./images/zipkin-ui.png?raw=true"/></p>
 
-### Jaeger
-
-- Run the server
-
-   ```sh
-   # from this directory
-   npm run jaeger:server
-   ```
-
-- Run the client
-
-   ```sh
-   # from this directory
-   npm run jaeger:client
-   ```
-
-#### Jaeger UI
-
-The `jaeger:server` script should output the `traceid` in the terminal (e.g `traceid: 4815c3d576d930189725f1f1d1bdfcc6`).
-Go to Jaeger with your browser <http://localhost:16686/trace/(your-trace-id)> (e.g <http://localhost:16686/trace/4815c3d576d930189725f1f1d1bdfcc6>)
-
-<p align="center"><img alt="Jaeger UI with trace" src="images/jaeger-ui.png?raw=true"/></p>
-
 ## Useful links
 
 - For more information on OpenTelemetry, visit: <https://opentelemetry.io/>

examples/mysql/docker/collector/otel-collector-config.yaml

@@ -9,18 +9,13 @@ exporters:
     const_labels:
       label1: value1
 
-  logging:
-    loglevel: debug
+  debug:
+    verbosity: detailed
 
   zipkin:
     endpoint: "http://zipkin-all-in-one:9411/api/v2/spans"
     format: proto
 
-  jaeger:
-    endpoint: jaeger-all-in-one:14250
-    tls:
-      insecure: true
-
 processors:
   batch:
 
@@ -37,8 +32,8 @@ service:
     traces:
       receivers: [otlp]
       processors: [batch]
-      exporters: [logging]
+      exporters: [debug]
     metrics:
       receivers: [otlp]
       processors: [batch]
-      exporters: [logging, prometheus]
+      exporters: [debug, prometheus]

examples/mysql/docker/docker-compose.yaml

@@ -1,9 +1,9 @@
-version: "2"
 services:
 
 # mysql
   mysql:
     image: mysql:5.7
+    platform: linux/amd64
     command: --init-file /etc/mysql/init.sql
     volumes:
         - ./mysql/init.sql:/etc/mysql/init.sql
@@ -12,26 +12,18 @@ services:
     ports:
       - "3306:3306"
 
-# Jaeger
-
-  jaeger-all-in-one:
-    image: jaegertracing/all-in-one:latest
-    ports:
-      - "16686:16686"
-      - "14268"
-      - "14250"
-
 # Zipkin
 
   zipkin-all-in-one:
     image: openzipkin/zipkin:latest
+    platform: linux/amd64
     ports:
       - "9411:9411"
 
 # Collector
 
   otel-collector:
-    image: otel/opentelemetry-collector-contrib:0.61.0
+    image: otel/opentelemetry-collector-contrib:0.111.0
     command: ["--config=/etc/otel-collector-config.yaml", ""]
     volumes:
       - ./collector/otel-collector-config.yaml:/etc/otel-collector-config.yaml
@@ -43,7 +35,6 @@ services:
       - "4317:4317"   # OTLP gRPC receiver
       - "55679:55679" # zpages extension
     depends_on:
-      - jaeger-all-in-one
       - zipkin-all-in-one
 
 # Prometheus

examples/mysql/package.json

@@ -9,8 +9,6 @@
     "docker:stop": "docker stop example-mysql && docker rm example-mysql",
     "zipkin:server": "cross-env EXPORTER=zipkin ts-node src/server.ts",
     "zipkin:client": "cross-env EXPORTER=zipkin ts-node src/client.ts",
-    "jaeger:server": "cross-env EXPORTER=jaeger ts-node src/server.ts",
-    "jaeger:client": "cross-env EXPORTER=jaeger ts-node src/client.ts",
     "compile": "tsc -p ."
   },
   "repository": {
@@ -32,15 +30,15 @@
   },
   "dependencies": {
     "@opentelemetry/api": "^1.0.0",
-    "@opentelemetry/exporter-jaeger": "^1.0.0",
+    "@opentelemetry/exporter-metrics-otlp-grpc": "^0.48.0",
     "@opentelemetry/exporter-zipkin": "^1.0.0",
     "@opentelemetry/instrumentation": "^0.48.0",
     "@opentelemetry/instrumentation-http": "^0.48.0",
     "@opentelemetry/instrumentation-mysql": "^0.31.0",
     "@opentelemetry/sdk-trace-base": "^1.0.0",
     "@opentelemetry/sdk-trace-node": "^1.0.0",
     "@opentelemetry/semantic-conventions": "^1.27.0",
-    "@opentelemetry/exporter-metrics-otlp-grpc": "^0.48.0",
+    "@types/node": "^18.18.14",
     "mysql": "^2.18.1"
   },
   "homepage": "https://github.com/open-telemetry/opentelemetry-js/tree/main/examples/mysql#readme",

examples/mysql/src/server.ts

@@ -52,7 +52,6 @@ function handleRequest(request: any, response: any) {
   // display traceid in the terminal
   const traceId = currentSpan?.spanContext().traceId;
   console.log(`traceid: ${traceId}`);
-  console.log(`Jaeger URL: http://localhost:16686/trace/${traceId}`);
   console.log(`Zipkin URL: http://localhost:9411/zipkin/traces/${traceId}`);
   try {
     const body = [];

examples/mysql/src/tracer.ts

@@ -3,7 +3,6 @@
 import opentelemetry from '@opentelemetry/api';
 import { NodeTracerProvider } from '@opentelemetry/sdk-trace-node';
 import { SimpleSpanProcessor } from '@opentelemetry/sdk-trace-base';
-import { JaegerExporter } from '@opentelemetry/exporter-jaeger';
 import { ZipkinExporter } from '@opentelemetry/exporter-zipkin';
 import { registerInstrumentations } from '@opentelemetry/instrumentation';
 import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
@@ -38,8 +37,6 @@ export const setupTracing = (serviceName: string) => {
 
   if (EXPORTER.toLowerCase().startsWith('z')) {
     tracerProvider.addSpanProcessor(new SimpleSpanProcessor(new ZipkinExporter()));
-  } else {
-    tracerProvider.addSpanProcessor(new SimpleSpanProcessor(new JaegerExporter()));
   }
 
   // Initialize the OpenTelemetry APIs to use the NodeTracerProvider bindings