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m18-health-check/package.json

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+{
+  "name": "hololake-health",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "express": "^5.2.1"
+  }
+}

m18-health-check/server.js

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+const express = require('express');
+const os = require('os');
+
+const app = express();
+const PORT = 3000;
+
+// 记录服务器启动时间
+const SERVER_START_TIME = new Date();
+
+// 解析JSON请求体
+app.use(express.json());
+
+// ========== 数据存储 ==========
+let heartbeats = [];
+const patrolHistory = [];
+const alerts = [];
+const HEARTBEAT_TIMEOUT = 5 * 60 * 1000; // 5分钟
+
+// ========== 告警检查函数 ==========
+function checkAlerts(memPercent) {
+    let level = null;
+    let message = '';
+    
+    if (memPercent > 90) {
+        level = 'critical';
+        message = `内存使用率过高: ${memPercent}%`;
+    } else if (memPercent > 80) {
+        level = 'warning';
+        message = `内存使用率警告: ${memPercent}%`;
+    }
+    
+    if (level) {
+        const alert = {
+            timestamp: new Date().toISOString(),
+            level: level,
+            message: message,
+            memoryPercent: memPercent
+        };
+        alerts.push(alert);
+        
+        if (alerts.length > 20) {
+            alerts.shift();
+        }
+        
+        console.log(`[ALERT] ${level.toUpperCase()}: ${message}`);
+    }
+}
+
+// ========== 在线状态检查函数 ==========
+function checkOnlineStatus() {
+    const now = Date.now();
+    const onlineServices = [];
+    const offlineServices = [];
+    
+    const latestHeartbeats = {};
+    heartbeats.forEach(hb => {
+        const source = hb.service || 'unknown';
+        if (!latestHeartbeats[source] || new Date(hb.timestamp) > new Date(latestHeartbeats[source].timestamp)) {
+            latestHeartbeats[source] = hb;
+        }
+    });
+    
+    for (const [source, hb] of Object.entries(latestHeartbeats)) {
+        const hbTime = new Date(hb.timestamp).getTime();
+        const isOnline = (now - hbTime) < HEARTBEAT_TIMEOUT;
+        
+        const serviceInfo = {
+            source: source,
+            lastHeartbeat: hb.timestamp,
+            secondsAgo: Math.floor((now - hbTime) / 1000),
+            status: isOnline ? 'online' : 'offline'
+        };
+        
+        if (isOnline) {
+            onlineServices.push(serviceInfo);
+        } else {
+            offlineServices.push(serviceInfo);
+        }
+    }
+    
+    return { online: onlineServices, offline: offlineServices };
+}
+
+// ========== API路由 ==========
+
+// GET /api/health - 快速健康检查
+app.get('/api/health', (req, res) => {
+    res.json({
+        status: 'healthy',
+        timestamp: new Date().toISOString()
+    });
+});
+
+// GET /api/status - 详细系统状态
+app.get('/api/status', (req, res) => {
+    const totalMem = os.totalmem();
+    const freeMem = os.freemem();
+    const usedMem = totalMem - freeMem;
+    const memPercent = Math.round((usedMem / totalMem) * 100);
+    
+    checkAlerts(memPercent);
+    
+    res.json({
+        service: 'HoloLake Health Monitor',
+        version: '1.0.0',
+        status: 'running',
+        timestamp: new Date().toISOString(),
+        uptime: {
+            seconds: Math.floor((Date.now() - SERVER_START_TIME.getTime()) / 1000),
+            startedAt: SERVER_START_TIME.toISOString()
+        },
+        system: {
+            platform: os.platform(),
+            arch: os.arch(),
+            hostname: os.hostname(),
+            nodeVersion: process.version
+        },
+        memory: {
+            totalMB: Math.round(totalMem / 1024 / 1024),
+            usedMB: Math.round(usedMem / 1024 / 1024),
+            freeMB: Math.round(freeMem / 1024 / 1024),
+            usagePercent: memPercent + '%'
+        },
+        services: checkOnlineStatus()
+    });
+});
+
+// POST /api/heartbeat - 心跳上报
+app.post('/api/heartbeat', (req, res) => {
+    const heartbeat = {
+        timestamp: new Date().toISOString(),
+        service: req.body.service || 'unknown',
+        status: req.body.status || 'ok'
+    };
+    heartbeats.push(heartbeat);
+    
+    res.json({
+        received: true,
+        heartbeat: heartbeat
+    });
+});
+
+// GET /api/heartbeat/history - 查看心跳历史
+app.get('/api/heartbeat/history', (req, res) => {
+    res.json({
+        total: heartbeats.length,
+        heartbeats: heartbeats.slice(-20)
+    });
+});
+
+// GET /api/heartbeat/online - 查看在线服务
+app.get('/api/heartbeat/online', (req, res) => {
+    const status = checkOnlineStatus();
+    res.json({
+        timestamp: new Date().toISOString(),
+        onlineCount: status.online.length,
+        offlineCount: status.offline.length,
+        online: status.online,
+        offline: status.offline
+    });
+});
+
+// GET /api/patrol/history - 查看巡检历史
+app.get('/api/patrol/history', (req, res) => {
+    res.json({
+        total: patrolHistory.length,
+        patrols: patrolHistory
+    });
+});
+
+// GET /api/alerts - 查看告警历史
+app.get('/api/alerts', (req, res) => {
+    res.json({
+        total: alerts.length,
+        critical: alerts.filter(a => a.level === 'critical').length,
+        warning: alerts.filter(a => a.level === 'warning').length,
+        alerts: alerts
+    });
+});
+
+// GET / - 根路径欢迎页
+app.get('/', (req, res) => {
+    res.json({
+        service: 'HoloLake Health Check & Status Report',
+        version: '2.0.0',
+        endpoints: [
+            'GET /api/health - 快速健康检查',
+            'GET /api/status - 详细系统状态',
+            'POST /api/heartbeat - 心跳上报',
+            'GET /api/heartbeat/history - 心跳历史',
+            'GET /api/heartbeat/online - 在线服务',
+            'GET /api/patrol/history - 巡检历史',
+            'GET /api/alerts - 告警历史'
+        ]
+    });
+});
+
+// ========== 定时自动巡检 ==========
+setInterval(() => {
+    console.log('[PATROL] 开始定时巡检...');
+    
+    const totalMem = os.totalmem();
+    const freeMem = os.freemem();
+    const usedMem = totalMem - freeMem;
+    const memPercent = Math.round((usedMem / totalMem) * 100);
+    
+    const patrolRecord = {
+        timestamp: new Date().toISOString(),
+        memory: {
+            totalMB: Math.round(totalMem / 1024 / 1024),
+            usedMB: Math.round(usedMem / 1024 / 1024),
+            usagePercent: memPercent
+        },
+        uptime: Math.floor((Date.now() - SERVER_START_TIME.getTime()) / 1000),
+        heartbeatCount: heartbeats.length
+    };
+    
+    patrolHistory.push(patrolRecord);
+    if (patrolHistory.length > 50) {
+        patrolHistory.shift();
+    }
+    
+    checkAlerts(memPercent);
+    
+    console.log(`[PATROL] 巡检完成 - 内存使用: ${memPercent}%`);
+}, 60000);
+
+// 启动服务器
+app.listen(PORT, () => {
+    console.log('='.repeat(50));
+    console.log('🌊 HoloLake Health Check & Status Report');
+    console.log('📡 服务运行在: http://localhost:' + PORT);
+    console.log('💚 GET /api/health - 健康检查');
+    console.log('📊 GET /api/status - 系统状态');
+    console.log('💓 POST /api/heartbeat - 心跳上报');
+    console.log('🔄 定时巡检 - 每60秒');
+    console.log('🚨 异常告警 - 内存>80%');
+    console.log('⏰ 心跳超时 - 5分钟');
+    console.log('='.repeat(50));
+});