Example of adding sentry to an existing OTEL app

Author: AbhiPrasad

examples/esm-http-ts/index.ts

@@ -1,3 +1,26 @@
+import * as Sentry from "@sentry/node";
+import {
+  SentrySpanProcessor,
+  SentryPropagator,
+  SentrySampler,
+} from "@sentry/opentelemetry";
+
+// Make sure `Sentry.init` is called before any other OTEL code
+Sentry.init({
+  // fake DSN
+  dsn: "https://[email protected]/1337",
+  skipOpenTelemetrySetup: true,
+
+  beforeSendTransaction: (transaction) => {
+    // Log out transactions for debugging, don't send any data to Sentry
+    console.log(transaction);
+    return null;
+  },
+
+  // The SentrySampler will use this to determine which traces to sample
+  tracesSampleRate: 1.0,
+});
+
 import { registerInstrumentations } from '@opentelemetry/instrumentation';
 import { trace, DiagConsoleLogger, DiagLogLevel, diag } from '@opentelemetry/api';
 import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
@@ -10,21 +33,32 @@ import { Resource } from '@opentelemetry/resources';
 import { SEMRESATTRS_SERVICE_NAME } from '@opentelemetry/semantic-conventions';
 import http from 'http';
 
-diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.DEBUG);
+// Turn of OTEL debug logging in favour of Sentry debug logging
+// diag.setLogger(new DiagConsoleLogger(), DiagLogLevel.DEBUG);
+
+const sentryClient = Sentry.getClient();
+
 const tracerProvider = new NodeTracerProvider({
   resource: new Resource({
     [SEMRESATTRS_SERVICE_NAME]: 'esm-http-ts-example',
   }),
+  sampler: sentryClient ? new SentrySampler(sentryClient) : undefined,
 });
 const exporter = new ConsoleSpanExporter();
 const processor = new SimpleSpanProcessor(exporter);
+tracerProvider.addSpanProcessor(new SentrySpanProcessor());
 tracerProvider.addSpanProcessor(processor);
-tracerProvider.register();
+tracerProvider.register({
+  propagator: new SentryPropagator(),
+  contextManager: new Sentry.SentryContextManager(),
+});
 
 registerInstrumentations({
   instrumentations: [new HttpInstrumentation()],
 });
 
+Sentry.validateOpenTelemetrySetup();
+
 const hostname = '0.0.0.0';
 const port = 3000;