jkooe
cb468df7da
scripts/startup-guard.mjs + scripts/lib/startup-guard-core.mjs（新增）： - 被控端启动连续失败 N 次（默认 3）自动从 LKG 指纹匹配的备份恢复入口脚本 - 30s 启动宽限期 + 端口探活，避免计划内重启与 supervisor 重启撞车被误计数 - 无 LKG / 无指纹匹配只记日志放行，绝不擦除 install-dir - 恢复成功或服务已就绪均归零失败计数；被控端启动成功后 resetStartupGuardState 归零 （apps/agent/src/index.ts 为本任务对 agent 的唯一改动点） 三端 supervisor 接入： - Windows install.ps1：计划任务包一层 guard，RestartCount 3→10（保证阈值可达） - Linux install-linux.sh：systemd unit 的 ExecStart 包一层 guard - macOS launchd：无安装器，docs/DEVELOPMENT.md §7.4 给出完整接法 docs：DELIVERY-PIPELINE §6 由「不做自动回滚」收窄为 「手动 rollback + 看门狗自动恢复 + 边界明示」，附录 C 同步； DEVELOPMENT.md 新增 §7.4 三端 supervisor 接入说明。
459 lines
16 KiB
JavaScript
459 lines
16 KiB
JavaScript
#!/usr/bin/env node
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/**
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* 启动看门狗（startup-guard.mjs）—— 被控端「启动连续失败 N 次」自动从 LKG 恢复。
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*
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* ## 为什么需要（决策 R-1，ARCH A-P0-6）
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* `nodeagent rollback` 是 RPC 命令：被控端**完全起不来时没有监听可连**，CLI 无能为力。
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* 本脚本补上这条链路：外层 supervisor（Windows 计划任务 / Linux systemd /
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* macOS launchd）每次拉起被控端都先过本守卫；启动连续失败达到阈值时，
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* 自动用 LKG 记录 + 备份指纹匹配恢复入口文件，再放行启动。
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*
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* ## 裸环境铁律
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* **零项目依赖、不 import 项目内模块**（连 @nodeagent/* 都不碰）——
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* 它要在被控端的裸环境里跑：只依赖 Node ≥22 内置模块 + 同目录的
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* `lib/startup-guard-core.mjs`（纯函数，也无依赖）。分发时两个文件必须
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* 保持相对位置一起拷贝（见 install-linux.sh / install.ps1 / pack.mjs）。
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*
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* ## 用法
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* node scripts/startup-guard.mjs \
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* --data-dir <数据目录> --lkg-dir <备份所在目录> --install-dir <安装目录> \
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* [--entry agent.mjs] [--threshold 3] [--port 8765] \
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* -- <被看守的完整启动命令...>
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*
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* ## 行为契约（与 supervisor 的退出码约定）
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* - 退出 0：服务已由别的实例提供 / 干净停止 / 本守卫被要求停；
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* - 退出非 0：启动失败（已计数）或运行期退出 —— supervisor 据此重启，
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* 重启后本守卫重新读计数，达到阈值即执行 LKG 恢复。
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*
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* ## 安全边界（写进 DELIVERY-PIPELINE §6 的明示）
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* - **无 LKG / 无指纹匹配的备份 → 记日志后放行，绝不擦除 install-dir**；
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* - agent.mjs 自身损坏到 Node 都无法解析、或 Node 运行时缺失时，
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* 本守卫同样无法运行 —— 那种场景只能带外恢复（附录 C）。
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*/
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import { createHash } from 'node:crypto';
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import { spawn } from 'node:child_process';
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import {
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closeSync, existsSync, mkdirSync, openSync, readFileSync, readdirSync, readSync, statSync, writeFileSync,
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} from 'node:fs';
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import { basename, join, resolve } from 'node:path';
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import net from 'node:net';
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import { fileURLToPath } from 'node:url';
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import {
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STARTUP_GRACE_MS,
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backupNameRegex,
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decideAfterExit,
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decideRestore,
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initialState,
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planRestore,
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readState,
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zeroFailures,
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} from './lib/startup-guard-core.mjs';
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// ---------- 路径与状态 ----------
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const LKG_FILE = 'agent-lkg.json';
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const HASH_CHUNK = 512 * 1024;
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/** 状态文件路径：<data-dir>/state/startup-state.json */
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export function statePath(dataDir) {
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return join(dataDir, 'state', 'startup-state.json');
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}
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/** 读失败计数；文件缺失/损坏按 0（不猜、不拒绝服务）。 */
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export function readStateFile(dataDir) {
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try {
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const p = statePath(dataDir);
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if (!existsSync(p)) return initialState();
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return readState(readFileSync(p, 'utf8'));
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} catch {
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return initialState();
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}
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}
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/** 写失败计数（含目录创建）；失败返回 false（不抛——计数丢了下次重新数）。 */
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export function writeState(dataDir, state) {
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try {
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mkdirSync(join(dataDir, 'state'), { recursive: true });
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writeFileSync(statePath(dataDir), `${JSON.stringify(state, null, 2)}\n`, 'utf8');
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return true;
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} catch {
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return false;
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}
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}
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/** 追加一行 JSONL 日志：<data-dir>/logs/startup-guard.log（失败静默——日志不拦路）。 */
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export function appendGuardLog(dataDir, obj) {
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try {
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mkdirSync(join(dataDir, 'logs'), { recursive: true });
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const line = `${JSON.stringify({ ts: new Date().toISOString(), ...obj })}\n`;
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writeFileSync(join(dataDir, 'logs', 'startup-guard.log'), line, { flag: 'a' });
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} catch {
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/* 日志失败不影响启动 */
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}
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}
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// ---------- LKG 与备份 ----------
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/** 读 LKG 记录（<data-dir>/agent-lkg.json）；缺失/损坏返回 null。 */
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export function readLkgRecord(dataDir) {
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try {
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const p = join(dataDir, LKG_FILE);
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if (!existsSync(p)) return null;
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const rec = JSON.parse(readFileSync(p, 'utf8'));
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if (!rec || typeof rec.hash !== 'string' || !rec.hash) return null;
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return rec;
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} catch {
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return null;
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}
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}
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/** 流式计算文件 sha256（分块读，不吃内存）。 */
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export function hashFileSync(p) {
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const fd = openSync(p, 'r');
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try {
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const h = createHash('sha256');
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const buf = Buffer.alloc(HASH_CHUNK);
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for (;;) {
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const n = readSync(fd, buf, 0, buf.length, null);
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if (n === 0) break;
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h.update(buf.subarray(0, n));
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}
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return h.digest('hex');
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} finally {
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closeSync(fd);
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}
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}
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/**
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* 枚举备份候选：<lkg-dir> 下 `<entry>.bak` / `<entry>.bak-<ts>`，按 mtime 新→早。
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*
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* 与 CLI rollback 的 backupNameRegex 同口径（tests 有跨端一致性守卫）：
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* deploy 固定名 + selfupdate 时间戳名两套命名都要认。
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*/
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export function listBackupCandidates(lkgDir, entryName) {
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const re = backupNameRegex(entryName);
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let items;
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try {
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items = readdirSync(lkgDir, { withFileTypes: true });
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} catch {
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return [];
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}
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const out = [];
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for (const it of items) {
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if (!it.isFile() || !re.test(it.name)) continue;
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try {
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const st = statSync(join(lkgDir, it.name));
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out.push({ path: join(lkgDir, it.name), name: it.name, mtime: st.mtimeMs, size: st.size });
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} catch {
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/* 单个文件 stat 失败就跳过 */
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}
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}
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out.sort((a, b) => b.mtime - a.mtime);
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return out;
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}
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/**
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* 从 LKG 恢复入口文件（达到阈值时调用）。
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*
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* 流程：读 LKG → 枚举备份 → 流式指纹匹配（hash_full 全量优先，老记录 12 位前缀回落）
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* → 命中则**就地覆写** install-dir/<entry>（同 selfupdate 姿势：不 rename，
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* Windows 上 rename 会被占用的文件/杀软挡下，真机教训）→ 写后校验。
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*
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* 安全边界：无 LKG / 无候选 / 无匹配 / 读失败 → 原样返回不恢复，
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* **绝不清空或部分擦写 install-dir**。任何异常都吞掉返回 error ——
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* 守卫自己坏掉时也要放行启动，不能把「恢复」变成「致人死亡」。
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*
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* @returns {{restored: boolean, backup: string|null, reason: string, entry?: string,
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* hash?: string, candidates?: string[]}}
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*/
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export function restoreFromLkg({ dataDir, lkgDir, installDir, entry }) {
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try {
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const lkg = readLkgRecord(dataDir);
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if (!lkg) return { restored: false, backup: null, reason: 'no-lkg' };
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const want = lkg.hash_full ?? lkg.hash;
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const entryName = entry || basename(lkg.script_path || '') || 'agent.mjs';
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const cands = listBackupCandidates(lkgDir, entryName);
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if (cands.length === 0) return { restored: false, backup: null, reason: 'no-candidates', entry: entryName };
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const hashed = [];
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for (const c of cands) {
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try {
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hashed.push({ path: c.path, hash: hashFileSync(c.path), mtime: c.mtime });
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} catch {
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/* 跳过读不了的候选 */
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}
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}
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const picked = planRestore(hashed, want);
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if (!picked) {
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return {
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restored: false,
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backup: null,
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reason: 'no-match',
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entry: entryName,
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candidates: hashed.map((h) => `${h.path} ${h.hash.slice(0, 12)}`),
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};
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}
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const target = join(installDir, entryName);
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const buf = readFileSync(picked.path);
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writeFileSync(target, buf);
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// 写后校验：目标内容必须等于备份内容（防写一半/被杀软改坏）
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const after = hashFileSync(target);
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if (after !== picked.hash) {
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return { restored: false, backup: picked.path, reason: 'verify-failed', entry: entryName };
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}
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return { restored: true, backup: picked.path, hash: picked.hash, entry: entryName, bytes: buf.length };
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} catch (err) {
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return { restored: false, backup: null, reason: `error: ${err instanceof Error ? err.message : String(err)}` };
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}
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}
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// ---------- 端口探活 ----------
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/**
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* 解析被控端端口：--port 参数优先，否则读 <data-dir>/agent.json 的 port 字段。
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* 都没有（如 Hub 模式不监听本地端口）→ null，此时跳过所有端口判断。
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*/
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export function resolvePort(dataDir, portArg) {
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if (Number.isInteger(portArg) && portArg > 0 && portArg < 65536) return portArg;
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try {
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const p = join(dataDir, 'agent.json');
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if (existsSync(p)) {
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const cfg = JSON.parse(readFileSync(p, 'utf8'));
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const n = Number(cfg.port);
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if (Number.isInteger(n) && n > 0 && n < 65536) return n;
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}
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} catch {
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/* 忽略：端口未知就不做端口判断 */
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}
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return null;
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}
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/**
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* 端口是否已被服务（TCP 能连上即算，不做协议握手 —— 只要「有人在听」）。
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*
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* 用途有两个，都指向同一目的「别添乱」：
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* ① 启动前：服务已由别的实例提供 → 本守卫直接退出 0，不再 spawn（避免撞车）；
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* ② 子进程死后：服务已由别的实例接管 → 不算启动失败（撞车输的那次不算）。
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*/
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export function serviceUp(port, host = '127.0.0.1', timeoutMs = 500) {
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if (!port) return Promise.resolve(false);
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return new Promise((done) => {
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const s = net.connect({ host, port });
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const finish = (v) => {
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s.destroy();
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done(v);
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};
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s.setTimeout(timeoutMs, () => finish(false));
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s.once('connect', () => finish(true));
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s.once('error', () => finish(false));
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});
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}
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// ---------- 参数解析 ----------
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/**
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* 解析守卫自己的参数（纯函数，可单测）。
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* `--` 之后的所有 token 原样作为「被看守的完整启动命令」。
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*/
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export function parseGuardArgs(argv) {
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const sep = argv.indexOf('--');
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const own = sep >= 0 ? argv.slice(0, sep) : argv.slice();
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const out = {
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dataDir: '',
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lkgDir: '',
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installDir: '',
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entry: '',
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threshold: 3,
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port: null,
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cmd: sep >= 0 ? argv.slice(sep + 1) : [],
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help: false,
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};
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for (let i = 0; i < own.length; i += 1) {
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const a = own[i];
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const take = () => {
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const v = own[i + 1];
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if (v === undefined || v.startsWith('--')) throw new Error(`参数 ${a} 缺少取值`);
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i += 1;
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return v;
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};
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switch (a) {
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case '--data-dir': out.dataDir = take(); break;
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case '--lkg-dir': out.lkgDir = take(); break;
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case '--install-dir': out.installDir = take(); break;
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case '--entry': out.entry = take(); break;
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case '--threshold': out.threshold = Number(take()); break;
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case '--port': out.port = Number(take()); break;
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case '-h': case '--help': out.help = true; break;
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default: throw new Error(`未知参数: ${a}`);
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}
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}
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return out;
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}
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const USAGE = '用法: node startup-guard.mjs --data-dir <目录> --install-dir <目录> [--lkg-dir <目录>] ' +
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'[--entry agent.mjs] [--threshold 3] [--port 8765] -- <启动命令...>';
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// ---------- 主流程 ----------
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/**
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* 看守一个子进程直到它退出，并按 decideAfterExit 的决策处理计数与退出码。
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* （spawn / 信号转发都在这里；IO 之外的判断全部在 core 纯函数里。）
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*/
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async function supervise(opts, port) {
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const [cmdName, ...cmdArgs] = opts.cmd;
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const child = spawn(cmdName, cmdArgs, { stdio: 'inherit', cwd: opts.installDir, env: process.env });
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let stopping = false;
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const forwardSignal = (sig) => {
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stopping = true;
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if (child.exitCode === null && child.signalCode === null) {
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try {
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child.kill(sig);
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} catch {
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/* 已退出 */
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}
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// 兜底：子进程不理信号就强杀（守卫不能陪着赖着不走）
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setTimeout(() => {
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if (child.exitCode === null && child.signalCode === null) {
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try {
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child.kill('SIGKILL');
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} catch {
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/* 已退出 */
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}
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}
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}, 10_000).unref();
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}
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};
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process.on('SIGTERM', () => forwardSignal('SIGTERM'));
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process.on('SIGINT', () => forwardSignal('SIGINT'));
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const startedAt = Date.now();
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const exit = await new Promise((done) => {
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child.on('exit', (code, signal) => done({ code, signal }));
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child.on('error', (err) => {
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// spawn 本身失败（命令不存在等）= 启动期失败，按 code=1 计数
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appendGuardLog(opts.dataDir, { action: 'spawn-error', error: err.message });
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done({ code: 1, signal: null });
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});
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});
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const livedMs = Date.now() - startedAt;
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const up = await serviceUp(port);
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const decision = decideAfterExit({
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code: exit.code,
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signal: exit.signal,
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livedMs,
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stopping,
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serviceUp: up,
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state: readStateFile(opts.dataDir),
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nowIso: new Date().toISOString(),
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});
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appendGuardLog(opts.dataDir, {
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action: 'child-exit',
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code: exit.code,
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signal: exit.signal,
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lived_ms: livedMs,
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counted: decision.counted,
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persist: decision.persist,
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reason: decision.reason,
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service_up: up,
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failures: decision.state.failures,
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grace_ms: STARTUP_GRACE_MS,
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});
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if (decision.persist) writeState(opts.dataDir, decision.state);
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console.error(
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`[startup-guard] 子进程退出（code=${exit.code ?? 'null'} signal=${exit.signal ?? 'null'}，` +
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`存活 ${Math.round(livedMs / 1000)}s，${decision.reason}，失败计数 ${decision.state.failures}）`,
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);
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return decision.exitCode;
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}
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async function main() {
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let opts;
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try {
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opts = parseGuardArgs(process.argv.slice(2));
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} catch (err) {
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console.error(`[startup-guard] ${err instanceof Error ? err.message : String(err)}\n${USAGE}`);
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return 2;
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}
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if (opts.help) {
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console.log(USAGE);
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return 0;
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}
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if (!opts.dataDir || !opts.installDir || opts.cmd.length === 0) {
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console.error(`[startup-guard] 缺少必要参数（--data-dir / --install-dir / -- 启动命令）\n${USAGE}`);
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return 2;
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}
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if (!Number.isInteger(opts.threshold) || opts.threshold < 1) {
|
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console.error(`[startup-guard] --threshold 需为正整数，收到: ${opts.threshold}`);
|
||
return 2;
|
||
}
|
||
const lkgDir = opts.lkgDir || opts.installDir;
|
||
const port = resolvePort(opts.dataDir, opts.port);
|
||
const dataDir = opts.dataDir;
|
||
|
||
// ① 服务已由别的实例提供（撞车/接管场景）→ 使命达成，不再 spawn
|
||
if (await serviceUp(port)) {
|
||
appendGuardLog(dataDir, { action: 'already-up', port, reason: 'service-up' });
|
||
console.error(`[startup-guard] 端口 ${port} 已被服务，本实例不重复启动`);
|
||
return 0;
|
||
}
|
||
|
||
// ② 读失败计数；达到阈值 → 尝试从 LKG 恢复（无 LKG/无匹配 → 放行，不动 install-dir）
|
||
let state = readStateFile(dataDir);
|
||
if (decideRestore(state, opts.threshold)) {
|
||
const r = restoreFromLkg({ dataDir, lkgDir, installDir: opts.installDir, entry: opts.entry });
|
||
appendGuardLog(dataDir, {
|
||
action: 'restore',
|
||
failures: state.failures,
|
||
threshold: opts.threshold,
|
||
restored: r.restored,
|
||
backup: r.backup,
|
||
entry: r.entry,
|
||
reason: r.reason,
|
||
candidates: r.candidates,
|
||
});
|
||
if (r.restored) {
|
||
state = zeroFailures(new Date().toISOString());
|
||
writeState(dataDir, state);
|
||
console.error(`[startup-guard] 已从 LKG 恢复入口: ${r.backup} → ${join(opts.installDir, r.entry)}（失败计数归零）`);
|
||
} else {
|
||
console.error(`[startup-guard] 未执行恢复（${r.reason}）—— 按原状尝试启动`);
|
||
}
|
||
}
|
||
|
||
// ③ 看守启动命令（退出码契约见文件头）
|
||
console.error(`[startup-guard] 看守中: ${opts.cmd.join(' ')}（阈值 ${opts.threshold}，当前失败 ${state.failures} 次）`);
|
||
appendGuardLog(dataDir, {
|
||
action: 'spawn',
|
||
cmd: opts.cmd,
|
||
failures: state.failures,
|
||
threshold: opts.threshold,
|
||
port,
|
||
});
|
||
return supervise(opts, port);
|
||
}
|
||
|
||
// ---------- 入口 ----------
|
||
|
||
const isMain = (() => {
|
||
try {
|
||
const self = resolve(fileURLToPath(import.meta.url));
|
||
const argv1 = process.argv[1] ? resolve(process.argv[1]) : '';
|
||
return !!argv1 && self === argv1;
|
||
} catch {
|
||
return false;
|
||
}
|
||
})();
|
||
|
||
if (isMain) {
|
||
main()
|
||
.then((code) => process.exit(code))
|
||
.catch((err) => {
|
||
// 守卫自身崩溃：放行一次（不让守卫成为启动瓶颈），但留下证据
|
||
console.error(`[startup-guard] 守卫自身异常（已放行）: ${err instanceof Error ? err.message : String(err)}`);
|
||
process.exit(0);
|
||
});
|
||
}
|