89 lines
3.6 KiB
JavaScript
89 lines
3.6 KiB
JavaScript
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'use strict';
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const fs = require('fs');
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const path = require('path');
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/**
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* Egg.js 应用启动钩子 - AppBootHook
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* 表结构通过 migration/seeder 管理，不在启动时自动同步
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*/
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class AppBootHook {
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constructor(app) {
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this.app = app;
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}
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async willReady() {
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// 数据库表结构由 migration 管理，不在启动时自动 sync
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this.app.logger.info('[AppBoot] 服务启动完成');
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}
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/**
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* 进程就绪后，确保 app/public 下所有业务目录存在。
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*
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* 关键背景（生产踩坑）：
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* app/public/{works,answers,materials,tmp,...} 这类上传目录通常被 .gitignore 忽略，
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* 每次「整目录重新部署」(rsync --delete / 重新 clone) 都会被清空。
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* 若运行中的代码某条写入路径恰好没有即时 mkdir，就会 ENOENT → 上传失败 / 下载 404，
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* 且旧版 auth 中间件会把这类磁盘异常伪装成「401 登录过期」误导排查。
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* 此处统一在启动时把全部已知写入目录递归建好，作为永久兜底，
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* 与各处写入点的 fs.mkdirSync(recursive:true) 形成双保险。
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*/
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async didReady() {
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const publicDir = path.join(this.app.baseDir, 'app/public');
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const groups = ['zhongzhi', 'gaozhi', 'benke', 'jiaoshi'];
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// 需要按「目录/组别」创建的（组别子目录）
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const grouped = ['works', 'answers', 'materials', 'templates'];
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// 需要直接创建（无组别）的
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const flat = ['tmp', 'tmp/excel', 'tmp/zip', 'carousel', 'news'];
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const targets = [];
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for (const d of grouped) {
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for (const g of groups) targets.push(path.join(publicDir, d, g));
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}
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for (const d of flat) targets.push(path.join(publicDir, d));
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let created = 0;
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let existed = 0;
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for (const t of targets) {
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try {
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if (!fs.existsSync(t)) {
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fs.mkdirSync(t, { recursive: true });
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created++;
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} else {
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existed++;
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}
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} catch (e) {
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this.app.logger.error('[AppBoot] 创建上传目录失败', { target: t, message: e.message });
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}
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}
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this.app.logger.info(
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`[AppBoot] 上传目录就绪：已创建 ${created} 个，已存在 ${existed} 个（根: ${publicDir}）`
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);
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// 🔴 连接池容量自举断言（2026-08-13 推进 #16）：egg-cluster 按 os.cpus() 起多 worker，
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// 总连接数 ≈ worker 数 × pool.max。若超过 MySQL max_connections（默认 151），
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// 高峰期会偶发 "connection acquire timeout" / "too many connections"。
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// 启动期只做 WARN（不阻断启动），提醒运维调大 DB 或调小 DB_POOL_MAX。
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try {
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const os = require('os');
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const poolMax = parseInt(process.env.DB_POOL_MAX, 10) || 20;
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const rows = await this.app.model.query('SELECT @@max_connections AS m', { type: this.app.model.QueryTypes.SELECT });
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const dbMax = parseInt(rows && rows[0] && rows[0].m, 10) || 151;
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const workers = os.cpus().length;
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const estimated = workers * poolMax;
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if (estimated > dbMax) {
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this.app.logger.warn(
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`[AppBoot][pool] 预估总连接数 ${estimated} (${workers} workers × ${poolMax}) 超过 MySQL max_connections=${dbMax}，高峰期可能连接获取超时；建议调大 DB max_connections 或调小 DB_POOL_MAX`
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);
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} else {
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this.app.logger.info(`[AppBoot][pool] 连接池容量 OK：${estimated} (${workers} × ${poolMax}) ≤ MySQL max_connections=${dbMax}`);
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}
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} catch (e) {
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this.app.logger.warn('[AppBoot][pool] 连接数自举断言跳过（无法查询 MySQL）：' + (e && e.message));
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}
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}
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}
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module.exports = AppBootHook;
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