Revert "refactor(server): standarderlize metrics and trace with OTEL (#5054)"

This reverts commit 91efca107a.

packages/backend/server/src/index.ts

@@ -1,9 +1,22 @@
 /// <reference types="./global.d.ts" />
-import { start as startAutoMetrics } from './metrics';
-startAutoMetrics();
-
+import { MetricExporter } from '@google-cloud/opentelemetry-cloud-monitoring-exporter';
+import { TraceExporter } from '@google-cloud/opentelemetry-cloud-trace-exporter';
 import { NestFactory } from '@nestjs/core';
 import type { NestExpressApplication } from '@nestjs/platform-express';
+import {
+  CompositePropagator,
+  W3CBaggagePropagator,
+  W3CTraceContextPropagator,
+} from '@opentelemetry/core';
+import gql from '@opentelemetry/instrumentation-graphql';
+import { HttpInstrumentation } from '@opentelemetry/instrumentation-http';
+import ioredis from '@opentelemetry/instrumentation-ioredis';
+import { NestInstrumentation } from '@opentelemetry/instrumentation-nestjs-core';
+import socketIO from '@opentelemetry/instrumentation-socket.io';
+import { PeriodicExportingMetricReader } from '@opentelemetry/sdk-metrics';
+import { NodeSDK } from '@opentelemetry/sdk-node';
+import { BatchSpanProcessor } from '@opentelemetry/sdk-trace-node';
+import { PrismaInstrumentation } from '@prisma/instrumentation';
 import cookieParser from 'cookie-parser';
 import { static as staticMiddleware } from 'express';
 import graphqlUploadExpress from 'graphql-upload/graphqlUploadExpress.mjs';
@@ -15,6 +28,35 @@ import { serverTimingAndCache } from './middleware/timing';
 import { RedisIoAdapter } from './modules/sync/redis-adapter';
 
 const { NODE_ENV, AFFINE_ENV } = process.env;
+
+if (NODE_ENV === 'production') {
+  const traceExporter = new TraceExporter();
+  const tracing = new NodeSDK({
+    traceExporter,
+    metricReader: new PeriodicExportingMetricReader({
+      exporter: new MetricExporter(),
+    }),
+    spanProcessor: new BatchSpanProcessor(traceExporter),
+    textMapPropagator: new CompositePropagator({
+      propagators: [
+        new W3CBaggagePropagator(),
+        new W3CTraceContextPropagator(),
+      ],
+    }),
+    instrumentations: [
+      new NestInstrumentation(),
+      new ioredis.IORedisInstrumentation(),
+      new socketIO.SocketIoInstrumentation({ traceReserved: true }),
+      new gql.GraphQLInstrumentation({ mergeItems: true }),
+      new HttpInstrumentation(),
+      new PrismaInstrumentation(),
+    ],
+    serviceName: 'affine-cloud',
+  });
+
+  tracing.start();
+}
+
 const app = await NestFactory.create<NestExpressApplication>(AppModule, {
   cors: true,
   rawBody: true,