feat: add opentelemetry

package.json

@@ -30,6 +30,11 @@
     "@nestjs/mapped-types": "*",
     "@nestjs/microservices": "^11.1.12",
     "@nestjs/platform-express": "^11.0.1",
+    "@opentelemetry/auto-instrumentations-node": "^0.72.0",
+    "@opentelemetry/exporter-trace-otlp-grpc": "^0.214.0",
+    "@opentelemetry/resources": "^2.6.1",
+    "@opentelemetry/sdk-node": "^0.214.0",
+    "@opentelemetry/semantic-conventions": "^1.40.0",
     "@prisma/adapter-pg": "^7.3.0",
     "@prisma/client": "^7.3.0",
     "@teacinema/common": "^1.0.0",

src/main.ts

@@ -4,6 +4,7 @@ import { NestFactory } from '@nestjs/core'
 import { createGrpcServer } from '@/infra/grpc/grpc.server'
 
 import { AppModule } from './app.module'
+import './observability/tracing'
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule)

src/observability/tracing.ts

@@ -0,0 +1,27 @@
+import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node'
+import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-grpc'
+import { resourceFromAttributes } from '@opentelemetry/resources'
+import { NodeSDK } from '@opentelemetry/sdk-node'
+import { ATTR_SERVICE_NAME } from '@opentelemetry/semantic-conventions'
+
+const traceExporter = new OTLPTraceExporter({
+  url: 'http://jaeger:4317'
+})
+
+const otelSdk = new NodeSDK({
+  traceExporter,
+  resource: resourceFromAttributes({
+    [ATTR_SERVICE_NAME]: 'auth-service'
+  }),
+  instrumentations: [
+    getNodeAutoInstrumentations({
+      '@opentelemetry/instrumentation-grpc': { enabled: true },
+      '@opentelemetry/instrumentation-http': { enabled: true },
+      '@opentelemetry/instrumentation-nestjs-core': { enabled: true },
+      '@opentelemetry/instrumentation-redis': { enabled: true },
+      '@opentelemetry/instrumentation-pg': { enabled: true }
+    })
+  ]
+})
+
+otelSdk.start()