serv00部署gpt-load && Passenger进程保活

0.前提，部署到make run那一步，还未进行pm2保活

https://linux.do/t/topic/835935

git clone https://github.com/tbphp/gpt-load.git
cd gpt-load
go mod tidy
# 创建配置
cp .env.example .env
# 登陆serv00开放端口
make run
# 会打印出启动成功日志

pm2保活（可选）
go build -o gpt-load-server .
pm2 start ./gpt-load-server --name gpt-load

1.开始，参考下面讲的passenger保活进程，

https://github.com/hkfires/Keep-Serv00-Alive

2.app.js代码：

const express = require("express");
const { exec } = require("child_process");
const fs = require("fs");
const path = require("path");
const app = express();

// ================== 配置区域 ==================
const port = process.env.PORT || 3000;
const USER = "username";
const TARGET_PORT = "30345";
const WORK_DIR = `/home/${USER}/gpt-load`;
const CMD = `./gpt-load-server`;
const PROCESS_NAME = "gpt-load-server";

// 日志文件路径 (在 public_nodejs 目录下)
const LOG_FILE = path.join(__dirname, 'keeper.log');

// 🛑 新增：暂停开关文件路径 (只要这个文件存在，脚本就不干活)
const STOP_FILE = path.join(__dirname, 'stop.txt');
// ============================================

// 自定义日志函数：同时输出到控制台和文件
function log(message) {
    const time = new Date().toLocaleString();
    const logMsg = `[${time}] ${message}\n`;
    
    // 1. 尝试写入文件
    try {
        fs.appendFileSync(LOG_FILE, logMsg);
    } catch (e) {
        // 如果写文件失败，至少打印到 stderr
        console.error(`Log write error: ${e.message}`);
    }
    
    // 2. 输出到控制台 (保留标准输出)
    console.log(logMsg.trim());
}

function keepAlive() {
    // ============================================================
    // 🛑 新增：维护模式检测
    // 如果目录下存在 stop.txt，直接跳过后续所有检查
    if (fs.existsSync(STOP_FILE)) {
        // 为了防止日志刷屏，这里可以选择不打印，或者每次跳过时打印
        // 这里设置为每次周期都记录一下，方便确认状态
        log("🛑 Maintenance Mode Active (stop.txt found). Skipping checks.");
        return;
    }
    // ============================================================

    // 1. 核心检测：查端口 (保持原有逻辑)
    exec(`sockstat -4 -l -P tcp | grep ${TARGET_PORT}`, (err, stdout) => {
        if (stdout && stdout.includes(TARGET_PORT)) {
            log(`Port ${TARGET_PORT} is UP. Service is healthy.`);
        } else {
            log(`Port ${TARGET_PORT} is DOWN. Initiating restart sequence...`);
            
            // 2. 清理旧进程
            log(`Cleaning up any stuck '${PROCESS_NAME}' processes...`);
            exec(`pkill -f "${PROCESS_NAME}"`, () => {
                
                // 3. 启动新进程
                log(`Starting new instance...`);
                // 注意：gpt-load 自身的日志依然写到它自己的 gpt-load.log 里
                exec(`cd ${WORK_DIR} && ${CMD} > gpt-load.log 2>&1 &`, (startErr) => {
                    if (startErr) log(`Start failed: ${startErr}`);
                    else log(`Start command sent successfully.`);
                });
            });
        }
    });
}

// 启动时立即检查
log("Keeper Service Started.");
keepAlive();

// 每 60 秒检查一次
setInterval(keepAlive, 60 * 1000);

// 修改：Web 访问时也能看到状态
app.get("/", (req, res) => {
    if (fs.existsSync(STOP_FILE)) {
        res.send("🛑 Service is in MAINTENANCE MODE (stop.txt detected).");
    } else {
        res.send(`✅ Keeper is watching port ${TARGET_PORT}`);
    }
});

app.listen(port, () => log(`Keeper listening on port ${port}`));

部分网路节点存在非标准端口阻断的问题，导致访问502
新的app.js，转发端口，来实现纯域名访问

const express = require("express");
const { exec } = require("child_process");
const fs = require("fs");
const path = require("path");
const { createProxyMiddleware } = require("http-proxy-middleware"); // 引入代理插件
const app = express();

// ================== 配置区域 ==================
const port = process.env.PORT || 3000;
const USER = "username";
const TARGET_PORT = "30345";
const WORK_DIR = `/home/${USER}/gpt-load`;
const CMD = `./gpt-load-server`;
const PROCESS_NAME = "gpt-load-server";

// 日志文件
const LOG_FILE = path.join(__dirname, 'keeper.log');
// 暂停开关
const STOP_FILE = path.join(__dirname, 'stop.txt');
// ============================================

function log(message) {
    const time = new Date().toLocaleString();
    const logMsg = `[${time}] ${message}\n`;
    try { fs.appendFileSync(LOG_FILE, logMsg); } catch (e) {}
    console.log(logMsg.trim());
}

function keepAlive() {
    if (fs.existsSync(STOP_FILE)) {
        log("🛑 Maintenance Mode Active (stop.txt found). Skipping checks.");
        return; 
    }

    exec(`sockstat -4 -l -P tcp | grep ${TARGET_PORT}`, (err, stdout) => {
        if (stdout && stdout.includes(TARGET_PORT)) {
            log(`Port ${TARGET_PORT} is UP. Service is healthy.`);
        } else {
            log(`Port ${TARGET_PORT} is DOWN. Initiating restart sequence...`);
            log(`Cleaning up any stuck '${PROCESS_NAME}' processes...`);
            exec(`pkill -f "${PROCESS_NAME}"`, () => {
                log(`Starting new instance...`);
                exec(`cd ${WORK_DIR} && ${CMD} > gpt-load.log 2>&1 &`, (startErr) => {
                    if (startErr) log(`Start failed: ${startErr}`);
                    else log(`Start command sent successfully.`);
                });
            });
        }
    });
}

// 启动保活逻辑
log("Keeper Service Started.");
keepAlive();
setInterval(keepAlive, 60 * 1000);

// ================== 路由配置 ==================

// 1. 特殊页面：查看保活状态 (访问 /keeper-status)
app.get("/keeper-status", (req, res) => {
    if (fs.existsSync(STOP_FILE)) {
        res.send("🛑 Service is in MAINTENANCE MODE (stop.txt detected).");
    } else {
        res.send(`✅ Keeper is watching port ${TARGET_PORT}. Service acts as Reverse Proxy.`);
    }
});

// 2. 反向代理：把所有其他请求转发给 gpt-load (30345)
// 这样你直接访问域名，就等于访问了 30345，但不用担心代理节点屏蔽端口
app.use("/", createProxyMiddleware({
    target: `http://127.0.0.1:${TARGET_PORT}`,
    changeOrigin: true,
    ws: true, // 支持 WebSocket (如果 gpt-load 需要)
    onError: (err, req, res) => {
        res.status(502).send(`
            <h1>502 Bad Gateway</h1>
            <p>Keeper is running, but gpt-load-server (Port ${TARGET_PORT}) seems down or starting.</p>
            <p>Check <a href="/keeper-status">/keeper-status</a> for details.</p>
        `);
    }
}));

app.listen(port, () => log(`Keeper & Proxy listening on port ${port}`));

显示keeper.log版本

const express = require("express");
const { exec } = require("child_process");
const fs = require("fs");
const path = require("path");
const os = require("os");
const { createProxyMiddleware } = require("http-proxy-middleware"); // 引入代理插件
const app = express();

// ================== 配置区域 ==================
const port = process.env.PORT || 3000;
const USER = "username";
const TARGET_PORT = "30345";
const WORK_DIR = `/home/${USER}/gpt-load`;
const CMD = `./gpt-load-server`;
const PROCESS_NAME = "gpt-load-server";

// 系统资源配额（根据您的实际环境配置）
const RESOURCE_QUOTAS = {
    disk: {
        total: 3.00 * 1024 * 1024 * 1024, // 3GB in bytes
        unit: 'GB'
    },
    processes: {
        max: 20
    },
    memory: {
        total: 512, // MB
        unit: 'MB'
    }
};

// 日志文件
const LOG_FILE = path.join(__dirname, 'keeper.log');
// 暂停开关
const STOP_FILE = path.join(__dirname, 'stop.txt');
// ============================================

function log(message) {
    const time = new Date().toLocaleString();
    const logMsg = `[${time}] ${message}\n`;
    try { fs.appendFileSync(LOG_FILE, logMsg); } catch (e) {}
    console.log(logMsg.trim());
}

// 缓存系统信息以减少重复计算
let systemInfoCache = null;
let lastSystemInfoTime = 0;
const CACHE_DURATION = 30000; // 30秒缓存

// 获取系统资源信息（极简版 - 仅内存监控）
function getSystemInfo() {
    const now = Date.now();
    
    // 如果缓存有效，直接返回
    if (systemInfoCache && (now - lastSystemInfoTime) < CACHE_DURATION) {
        return systemInfoCache;
    }
    
    try {
        // 内存检测（极简版）
        let totalMem = RESOURCE_QUOTAS.memory.total * 1024 * 1024;
        let usedMem = 0;
        let quotaMemUsagePercent = '0';
        
        // 使用进程内存统计 + 经验系数
        const processMem = process.memoryUsage();
        usedMem = processMem.rss;
        
        // 基于serv00环境的经验系数
        const multiplier = 4.2;
        usedMem = Math.min(usedMem * multiplier, RESOURCE_QUOTAS.memory.total * 1024 * 1024 * 0.9);
        
        quotaMemUsagePercent = ((usedMem / 1024 / 1024 / RESOURCE_QUOTAS.memory.total) * 100).toFixed(1);

        const sysInfo = {
            timestamp: new Date().toLocaleString(),
            memory: {
                total: (totalMem / 1024 / 1024).toFixed(1) + ' MB',
                used: (usedMem / 1024 / 1024).toFixed(1) + ' MB',
                free: ((totalMem - usedMem) / 1024 / 1024).toFixed(1) + ' MB',
                quotaUsagePercent: quotaMemUsagePercent + '%',
                quota: `${(usedMem / 1024 / 1024).toFixed(1)}/${RESOURCE_QUOTAS.memory.total} ${RESOURCE_QUOTAS.memory.unit} (极简估算)`
            }
        };

        // 更新缓存
        systemInfoCache = sysInfo;
        lastSystemInfoTime = now;
        
        return sysInfo;
    } catch (error) {
        return {
            error: 'Memory detection failed: ' + error.message,
            timestamp: new Date().toLocaleString()
        };
    }
}

// 读取最近的 keeper.log 内容（限制行数以节省资源）
function getRecentLogs(maxLines = 50) {
    try {
        if (!fs.existsSync(LOG_FILE)) {
            return ['Log file not found'];
        }
        
        const content = fs.readFileSync(LOG_FILE, 'utf8');
        const lines = content.split('\n').filter(line => line.trim() !== '');
        // 返回最后 maxLines 行
        return lines.slice(-maxLines);
    } catch (error) {
        return [`Error reading log: ${error.message}`];
    }
}

function keepAlive() {
    if (fs.existsSync(STOP_FILE)) {
        log("🛑 Maintenance Mode Active (stop.txt found). Skipping checks.");
        return;
    }

    exec(`sockstat -4 -l -P tcp | grep ${TARGET_PORT}`, (err, stdout) => {
        if (stdout && stdout.includes(TARGET_PORT)) {
            log(`Port ${TARGET_PORT} is UP. Service is healthy.`);
        } else {
            log(`Port ${TARGET_PORT} is DOWN. Initiating restart sequence...`);
            log(`Cleaning up any stuck '${PROCESS_NAME}' processes...`);
            exec(`pkill -f "${PROCESS_NAME}"`, () => {
                log(`Starting new instance...`);
                exec(`cd ${WORK_DIR} && ${CMD} > gpt-load.log 2>&1 &`, (startErr) => {
                    if (startErr) log(`Start failed: ${startErr}`);
                    else log(`Start command sent successfully.`);
                });
            });
        }
    });
}

// 启动保活逻辑
log("Keeper Service Started.");
keepAlive();
setInterval(keepAlive, 60 * 1000);

// ================== 路由配置 ==================

// 1. 特殊页面：查看保活状态 (访问 /keeper-status)
app.get("/keeper-status", (req, res) => {
    const sysInfo = getSystemInfo();
    const logs = getRecentLogs(30); // 显示最近30行日志
    
    let html = `
    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Keeper Status Dashboard</title>
        <style>
            body { font-family: Arial, sans-serif; margin: 20px; background-color: #f5f5f5; }
            .container { max-width: 1200px; margin: 0 auto; }
            .card { background: white; border-radius: 8px; padding: 20px; margin-bottom: 20px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
            .status-header { text-align: center; color: #333; }
            .status-indicator {
                display: inline-block;
                padding: 10px 20px;
                border-radius: 20px;
                font-weight: bold;
                margin: 10px 0;
            }
            .status-active { background-color: #d4edda; color: #155724; }
            .status-maintenance { background-color: #fff3cd; color: #856404; }
            .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
            .resource-card { background: #f8f9fa; border-left: 4px solid #007bff; }
            .log-container { background: #2d2d2d; color: #f8f8f2; padding: 15px; border-radius: 5px; font-family: 'Courier New', monospace; font-size: 12px; max-height: 400px; overflow-y: auto; }
            .log-entry { margin: 2px 0; }
            .log-error { color: #ff6b6b; }
            .log-success { color: #51cf66; }
            .log-warning { color: #ffd43b; }
            .refresh-btn {
                background: #007bff;
                color: white;
                border: none;
                padding: 10px 20px;
                border-radius: 5px;
                cursor: pointer;
                margin: 10px 5px;
            }
            .refresh-btn:hover { background: #0056b3; }
            h2 { color: #333; border-bottom: 2px solid #007bff; padding-bottom: 10px; }
            .metric { margin: 10px 0; }
            .metric-label { font-weight: bold; color: #555; }
            .metric-value { color: #007bff; font-family: 'Courier New', monospace; }
            .quota-info { font-size: 12px; color: #666; margin-top: 5px; }
            .usage-bar {
                height: 8px;
                background-color: #e9ecef;
                border-radius: 4px;
                margin: 8px 0;
                overflow: hidden;
            }
            .usage-fill {
                height: 100%;
                background-color: #28a745;
                transition: width 0.3s ease;
            }
            .usage-warning { background-color: #ffc107; }
            .usage-danger { background-color: #dc3545; }
        </style>
    </head>
    <body>
        <div class="container">
            <div class="card">
                <h1 class="status-header">keeper Status Dashboard</h1>
                <div class="status-indicator ${fs.existsSync(STOP_FILE) ? 'status-maintenance' : 'status-active'}">
                    ${fs.existsSync(STOP_FILE) ? '🛑 MAINTENANCE MODE' : '✅ ACTIVE MODE'}
                </div>
                <p>Monitoring port: <strong>${TARGET_PORT}</strong></p>
                <p>Last updated: <strong>${sysInfo.timestamp}</strong></p>
                <button class="refresh-btn" onclick="location.reload()">Refresh Status</button>
                <button class="refresh-btn" onclick="window.location.href='/'">Go to Main Site</button>
            </div>
    `;

    // 系统资源信息（仅显示内存）
    if (!sysInfo.error) {
        html += `
            <div class="grid">
                <div class="card resource-card">
                    <h2>💾 Memory Information</h2>
                    <div class="metric">
                        <span class="metric-label">Total Memory:</span>
                        <span class="metric-value">${sysInfo.memory.total}</span>
                    </div>
                    <div class="metric">
                        <span class="metric-label">Used Memory:</span>
                        <span class="metric-value">${sysInfo.memory.used}</span>
                    </div>
                    <div class="metric">
                        <span class="metric-label">Free Memory:</span>
                        <span class="metric-value">${sysInfo.memory.free}</span>
                    </div>
                    <div class="metric">
                        <span class="metric-label">Quota Usage:</span>
                        <span class="metric-value">${sysInfo.memory.quotaUsagePercent}</span>
                        <div class="quota-info">Quota: ${sysInfo.memory.quota}</div>
                    </div>
                    <div class="usage-bar">
                        <div class="usage-fill ${parseFloat(sysInfo.memory.quotaUsagePercent) > 80 ? 'usage-warning' : parseFloat(sysInfo.memory.quotaUsagePercent) > 90 ? 'usage-danger' : ''}" 
                             style="width: ${parseFloat(sysInfo.memory.quotaUsagePercent)}%"></div>
                    </div>
                </div>
            </div>
        `;
    } else {
        html += `
            <div class="card">
                <h2>⚠️ Memory Information Error</h2>
                <p>${sysInfo.error}</p>
            </div>
        `;
    }

    // 日志显示
    html += `
            <div class="card">
                <h2>📝 Recent Keeper Logs</h2>
                <div class="log-container">
    `;
    
    logs.forEach(logEntry => {
        if (logEntry.trim()) {
            // 为不同类型的日志添加颜色
            let logClass = 'log-entry';
            if (logEntry.includes('ERROR') || logEntry.includes('FAILED')) {
                logClass += ' log-error';
            } else if (logEntry.includes('SUCCESS') || logEntry.includes('UP') || logEntry.includes('healthy')) {
                logClass += ' log-success';
            } else if (logEntry.includes('MAINTENANCE') || logEntry.includes('STOP')) {
                logClass += ' log-warning';
            }
            
            html += `<div class="${logClass}">${logEntry}</div>`;
        }
    });

    html += `
                </div>
            </div>
        </div>
    </body>
    </html>
    `;

    res.send(html);
});

// 2. 反向代理：把所有其他请求转发给 gpt-load (30345)
// 这样你直接访问域名，就等于访问了 30345，但不用担心代理节点屏蔽端口
app.use("/", createProxyMiddleware({
    target: `http://127.0.0.1:${TARGET_PORT}`,
    changeOrigin: true,
    ws: true, // 支持 WebSocket (如果 gpt-load 需要)
    onError: (err, req, res) => {
        res.status(502).send(`
            <h1>502 Bad Gateway</h1>
            <p>Keeper is running, but gpt-load-server (Port ${TARGET_PORT}) seems down or starting.</p>
            <p>Check <a href="/keeper-status">/keeper-status</a> for details.</p>
        `);
    }
}));

app.listen(port, () => log(`Keeper & Proxy listening on port ${port}`));

### 3.启动程序（要以绝对路径启动，不然……app.js没办法重启gpt-load-server）
启动gpt-load-server

cd /home/username/gpt-load
nohup ./gpt-load-server > gpt-load.log 2>&1 &

启动app.js（在serv00网站restart就行，会自动生成keeper.log）

```
cd /home/username/domains/username.serv00.net/public_nodejs
nohup node app.js > app.log 2>&1 &
```

4.验证

手动杀掉gpt-load-server

pkill -f gpt-load-server

在public_nodejs目录

[id@s9]:<~/domains/id.serv00.net/public_nodejs>$ pkill -f gpt-load-server
[id@s9]:<~/domains/id.serv00.net/public_nodejs>$ tail -f keeper.log

查看app.log keeper.log

tail -f keeper.log

显示下面则成功：

5.暂停保活（开启维护模式）：

进入app.js所在目录创建 stop.txt 文件：

touch stop.txt

恢复保活（关闭维护模式）：

删除 stop.txt 文件：

rm stop.txt

PS：最简单的还是pm2保活，官方也没看到说禁止，说的是最好用passenger，访问我用的域名+端口，可以自己试试passenger反代去掉端口