livrare lot 2

backend/services/orchestration-layer/didiFramework/src/config/otel.ts

@@ -0,0 +1,44 @@
+/**
+ * OpenTelemetry instrumentation — auto-instrumentat pe Express, HTTP, pg, redis, ioredis.
+ * Trimite trace-uri la OTel Collector → Jaeger.
+ *
+ * Activează cu env var OTEL_ENABLED=true (off implicit ca să nu impacteze cold start).
+ */
+
+import { NodeSDK } from '@opentelemetry/sdk-node';
+import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node';
+import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
+import { Resource } from '@opentelemetry/resources';
+import { SemanticResourceAttributes } from '@opentelemetry/semantic-conventions';
+
+const SERVICE_NAME = process.env.OTEL_SERVICE_NAME || 'didi-framework';
+const ENDPOINT = process.env.OTEL_EXPORTER_OTLP_ENDPOINT || 'http://didi-otel-collector:4318/v1/traces';
+
+let sdk: NodeSDK | null = null;
+
+export function startOtel() {
+  if (process.env.OTEL_ENABLED !== 'true') return;
+  if (sdk) return;
+
+  sdk = new NodeSDK({
+    resource: new Resource({
+      [SemanticResourceAttributes.SERVICE_NAME]: SERVICE_NAME,
+      [SemanticResourceAttributes.SERVICE_VERSION]: process.env.SERVICE_VERSION || '1.0.0',
+    }),
+    traceExporter: new OTLPTraceExporter({ url: ENDPOINT }),
+    instrumentations: [
+      getNodeAutoInstrumentations({
+        '@opentelemetry/instrumentation-fs': { enabled: false },
+      }),
+    ],
+  });
+  sdk.start();
+  // eslint-disable-next-line no-console
+  console.log(`[otel] started, exporting to ${ENDPOINT} as ${SERVICE_NAME}`);
+}
+
+process.on('SIGTERM', () => {
+  if (sdk) {
+    sdk.shutdown().finally(() => process.exit(0));
+  }
+});