78 lines
2.8 KiB
TypeScript
78 lines
2.8 KiB
TypeScript
import "reflect-metadata";
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import { NestFactory } from "@nestjs/core";
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import { AppModule } from "./app.module.js";
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import { GlobalErrorFilter } from "./shared/errors/global-error.filter.js";
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import { initTracer, shutdownTracer } from "./shared/observability/tracer.js";
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import { env } from "./config/env.js";
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import { logger } from "./shared/observability/logger.js";
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import { checkEsConnection } from "./config/elasticsearch.js";
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import { grpcMicroserviceOptions } from "./config/grpc.js";
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import { metricsRegistry } from "./shared/observability/metrics.js";
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import type { Request, Response } from "express";
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/**
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* msg 服务启动入口。
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*
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* 仲裁依据：
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* - M1：gRPC 50056 启用（connectMicroservice）
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* - HTTP REST 3007 + gRPC 50056 双协议入口
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* - enableShutdownHooks()：NestJS 自动处理 SIGTERM/SIGINT → onApplicationShutdown
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*
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* 启动流程：
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* 1. initTracers()：OpenTelemetry 链路追踪
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* 2. checkEsConnection()：ES 探活（降级安全，不阻断启动）
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* 3. NestFactory.create(AppModule)：创建 app，触发 onModuleInit
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* - LifecycleService.onModuleInit：connectKafka + outboxPublisher.start
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* - KafkaConsumerService.onModuleInit：connectKafka + consumer.run
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* 4. connectMicroservice(grpcMicroserviceOptions)：注册 gRPC 服务
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* 5. startAllMicroservices()：启动 gRPC 50056
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* 6. listen(PORT)：启动 HTTP REST 3007
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*/
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async function bootstrap(): Promise<void> {
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initTracer();
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// ES 探活：未配置或失败时进入降级模式，不阻断启动。
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await checkEsConnection();
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const app = await NestFactory.create(AppModule, {
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logger: ["log", "error", "warn"],
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});
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app.useGlobalFilters(new GlobalErrorFilter());
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app.enableShutdownHooks();
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// 注册 gRPC 微服务（50056）
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app.connectMicroservice(grpcMicroserviceOptions);
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// Prometheus 指标端点：不鉴权，供 Prometheus 抓取。
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app.getHttpAdapter().get("/metrics", async (_req: Request, res: Response) => {
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res.set("Content-Type", metricsRegistry.contentType);
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res.end(await metricsRegistry.metrics());
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});
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// 启动 gRPC 微服务 + HTTP 服务
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await app.startAllMicroservices();
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await app.listen(env.PORT);
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logger.info(
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{ httpPort: env.PORT, grpcPort: env.GRPC_PORT },
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"Msg service started (HTTP + gRPC)",
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);
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// 兜底信号处理：enableShutdownHooks 已处理 SIGTERM/SIGINT，
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// 此处仅确保进程退出（防止悬挂连接阻塞退出）。
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const shutdown = async (signal: string): Promise<void> => {
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logger.info({ signal }, "Shutting down gracefully...");
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await app.close();
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await shutdownTracer();
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process.exit(0);
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};
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process.on("SIGTERM", () => void shutdown("SIGTERM"));
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process.on("SIGINT", () => void shutdown("SIGINT"));
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}
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void bootstrap().catch((err: unknown) => {
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logger.error({ err }, "Failed to start msg service");
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process.exit(1);
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});
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