f1e466a772
NestJS: disable incremental in 6 services tsconfig.json to fix dist not emitted when nest-cli deleteOutDir conflicts with tsc tsbuildinfo. classes/iam: import HealthModule in AppModule to fix /healthz 404. classes: rewrite HealthController to Drizzle getDb from TypeORM DI. teacher-bff: add /metrics endpoint for Prometheus scraping. infra: add node/mysql/redis exporters to observability profile. mysql-exporter v0.15.1 uses command-line flags not DATA_SOURCE_NAME. prometheus: enable web.enable-lifecycle for hot reload.
55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import { Controller, Get, HttpException, HttpStatus } from "@nestjs/common";
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import { sql } from "drizzle-orm";
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import { getDb } from "../../config/database.js";
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const SERVICE_NAME = "classes";
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/**
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* 健康检查端点。
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*
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* - GET /healthz：liveness，仅返回进程存活，不检查依赖。
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* - GET /readyz：readiness，检查 DB 连接，失败返回 503。
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*
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* 不需要鉴权，必须在路由白名单中放行。本控制器内容在 iam / core-edu /
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* content / msg / classes 五个 NestJS 服务中一致，仅 SERVICE_NAME 不同。
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*/
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@Controller()
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export class HealthController {
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@Get("healthz")
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liveness(): { status: string; service: string; timestamp: string } {
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return {
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status: "ok",
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service: SERVICE_NAME,
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timestamp: new Date().toISOString(),
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};
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}
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@Get("readyz")
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async readiness(): Promise<{
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status: string;
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service: string;
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timestamp: string;
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}> {
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try {
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const db = getDb();
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await db.execute(sql`SELECT 1`);
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return {
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status: "ok",
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service: SERVICE_NAME,
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timestamp: new Date().toISOString(),
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};
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} catch (error) {
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throw new HttpException(
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{
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status: "error",
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service: SERVICE_NAME,
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timestamp: new Date().toISOString(),
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error:
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error instanceof Error ? error.message : "database unreachable",
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},
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HttpStatus.SERVICE_UNAVAILABLE,
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);
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}
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}
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}
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