feat: add opentelemetry

package.json

@@ -28,6 +28,11 @@
     "@nestjs/microservices": "^11.1.12",
     "@nestjs/platform-express": "^11.0.1",
     "@nestjs/swagger": "^11.2.5",
+    "@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",
     "@teacinema/common": "^1.0.0",
     "@teacinema/contracts": "^1.0.0",
     "@teacinema/passport": "^1.0.0",

src/main.ts

@@ -6,6 +6,7 @@ import cookieParser from 'cookie-parser'
 
 import { AppModule } from './core/app.module'
 import { getCorsConfig, swaggerConfig, validationPipe } from './core/config'
+import './observability/tracing'
 import { GrpcExceptionFilter } from './shared/filters'
 
 async function bootstrap() {

src/observability/tracing.ts

@@ -0,0 +1,26 @@
+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]: 'gateway-service'
+  }),
+  instrumentations: [
+    getNodeAutoInstrumentations({
+      '@opentelemetry/instrumentation-http': { enabled: true },
+      '@opentelemetry/instrumentation-express': { enabled: true },
+      '@opentelemetry/instrumentation-nestjs-core': { enabled: true },
+      '@opentelemetry/instrumentation-grpc': { enabled: true },
+    })
+  ]
+})
+
+otelSdk.start()