user www-data;
worker_processes auto;
worker_cpu_affinity auto;
pid /run/nginx.pid;
error_log /var/log/nginx/error.log;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 768;
}

http {
    sendfile on;
    tcp_nopush on;
    types_hash_max_size 2048;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    access_log /var/log/nginx/access.log;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;

    server {
        listen 80;
        server_name 192.168.11.28;
        root  /example/www;

        location /exercise {
            # Node.jsアプリケーションへリクエストを転送
            proxy_pass http://localhost:3000;

            # ヘッダー設定
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;

            # 接続元IPをヘッダーに追加
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }
    }
}

const http = require("http");

const server = http.createServer((req, res) => {

    // プロキシ環境下で実際のIPを取得する場合
    var forwarded_ip = '0.0.0.0';
    if (req.headers['x-forwarded-for']) {
        forwarded_ip = req.headers['x-forwarded-for'];
    };

    // 1. リクエストURLからベースURLを補ってURLオブジェクトを作成
    const baseURL = `http://${req.headers.host}`;
    const url = new URL(req.url, baseURL);
    const params = url.searchParams;

    res.writeHead(200, { 'Content-Type': 'text/plain; charset=utf-8' });
    res.write(`Remote IP Address: ${forwarded_ip}\n`);
    res.write(`Domain IP Address: ${req.headers.host}\n`);
    res.write(`Path: ${req.url}\n`);

    // 2.1 searchParams.get('キー名') でGETパラメータを取得
    const name = params.get('name'); // 例: ?name=taro なら "taro"
    const age = params.get('age');   // 例: ?age=20 なら "20"
    res.write(`名前: ${name}, 年齢: ${age}\n`);

    // 2.2 すべての引数名と値の一覧を取得する
    for (const [key, value] of params.entries()) {
        res.write(`${key}: ${value}\n`);
    }

   res.end();
});

server.listen(3000);

drwxrwxr-x 31 pi pi  4096 Oct 10 19:01 node_modules
-rw-rw-r--  1 pi pi    56 Oct 10 19:01 package.json
-rw-rw-r--  1 pi pi 12815 Oct 10 19:01 package-lock.json

$ cat package.json

{
  "devDependencies": {
    "nodemon": "^3.1.14"
  }
}

{
  "devDependencies": {
    "nodemon": "^3.1.14"
  },

  "scripts": {
    "start": "nodemon index.js"
  }

}

> start
> nodemon index.js

[nodemon] 3.1.14
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,cjs,json
[nodemon] starting `node index.js`

server {
    listen 443 ssl;
    server_name example.com;

    # SSL証明書と秘密鍵の設定
    ssl_certificate /path/to/fullchain.pem;
    ssl_certificate_key /path/to/privkey.pem;

    location / {
        proxy_pass http://localhost:3000; # Node.jsが動いているポート
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        
        # クライアントの実際のIPやプロトコル情報をNode.js側に伝えるヘッダー
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

module.exports = {
    apps : [
    {
        name: "Node.js script(3000)",
        script: "./index.js",
        cwd : '/example/www/exercise/',
        exec_mode: 'fork',
        instances: 1,
        max_memory_restart: '50M',
        // exec_mode: 'cluster',
        // instances: -1,
        // max_memory_restart: '500M',
        interpreter: '/usr/bin/node',
        env: {
            PORT: 3000,
            NODE_ENV: "local",
        }
    }
    ]
}

[PM2] Applying action restartProcessId on app [Node.js script(3000)](ids: [ 0 ])
[PM2] [Node.js script(3000)](0) ?
+----+---------------------+----------+------+-----------+----------+---------+
| id | name                | mode     | ?    | status    | cpu      | memory   |
+----+---------------------+----------+------+-----------+----------+---------+
| 0  | Node.js script(30… | fork     | 1    | online    | 0%       | 23.5mb   |
+----+---------------------+----------+------+-----------+----------+---------+
host metrics | cpu: 0.3% | ram usage: 8% |

[PM2] Spawning PM2 daemon with pm2_home=/root/.pm2
[PM2] PM2 Successfully daemonized
[PM2][WARN] Applications Node.js script(3000) not running, starting...
[PM2] App [Node.js script(3000)] launched (3 instances)
+----+---------------------+----------+------+-----------+----------+---------+
| id | name                | mode     | ?    | status    | cpu      | memory  |
+----+---------------------+----------+------+-----------+----------+---------+
| 0  | Node.js script(30… | cluster  | 0    | online    | 0%       | 48.1mb  |
| 1  | Node.js script(30… | cluster  | 0    | online    | 0%       | 46.6mb  |
| 2  | Node.js script(30… | cluster  | 0    | online    | 0%       | 43.3mb  |
+----+---------------------+----------+------+-----------+----------+---------+
host metrics | cpu: 0% | ram usage: 50.8% |

+----+----------------------+-----------+---------+---------+------+--------+----+--------+-----+--------+------+----------+
| id | name                 | namespace | version | mode    | pid  | uptime | ?  | status | cpu | mem    | user | watching |
+----+----------------------+-----------+---------+---------+------+--------+----+--------+-----+--------+------+----------+
| 0  | Node.js script(3000) | default   | N/A     | cluster | 2153 | 2m     | 0  | online | 0%  | 42.4mb | root | disabled |
| 1  | Node.js script(3000) | default   | N/A     | cluster | 2160 | 2m     | 0  | online | 0%  | 41.9mb | root | disabled |
| 2  | Node.js script(3000) | default   | N/A     | cluster | 2171 | 2m     | 0  | online | 0%  | 46.2mb | root | disabled |
+----+----------------------+-----------+---------+---------+------+--------+----+--------+-----+--------+------+----------+
host metrics | cpu: 0.7% | ram usage: 64.8% | disk: ? 0.037mb/s ? 0mb/s /snap/core24/1644 100% /snap/snapd/27407 100% |

pi@ns:~ $ sudo pm2 show 0
 Describing process with id 0 - name Node.js script(3000)
+--------------------+--------------------------------------------------+
| status             | online                                           |
| name               | Node.js script(3000)                             |
| namespace          | default                                          |
| version            | N/A                                              |
| restarts           | 0                                                |
| max memory restart | 524288000                                        |
| uptime             | 8m                                               |
| script path        | /example/www/exercise/index.js                   |
| script args        | N/A                                              |
| error log path     | /root/.pm2/logs/Node.js-script-3000--error-0.log |
| out log path       | /root/.pm2/logs/Node.js-script-3000--out-0.log   |
| pid path           | /root/.pm2/pids/Node.js-script-3000--0.pid       |
| interpreter        | /usr/bin/node                                    |
| interpreter args   | N/A                                              |
| script id          | 0                                                |
| exec cwd           | /example/www/exercise                            |
| exec mode          | fork_mode                                        |
| node.js version    | 20.20.2                                          |
| node env           | local                                            |
| watch & reload     | ?                                                |
| unstable restarts  | 0                                                |
| created at         | 2026-10-09T11:53:54.958Z                         |
+--------------------+--------------------------------------------------+
 Actions available
+------------------------+
| km:heapdump            |
| km:cpu:profiling:start |
| km:cpu:profiling:stop  |
| km:heap:sampling:start |
| km:heap:sampling:stop  |
+------------------------+
 Trigger via: pm2 trigger Node.js script(3000) 

 Code metrics value
+------------------------+-----------+
| Active requests        | 0         |
| Active handles         | 1         |
| Event Loop Latency     | 0.44 ms   |
| Event Loop Latency p95 | 1.29 ms   |
| Heap Size              | 6.32 MiB  |
| Heap Usage             | 78.72 %   |
| Used Heap Size         | 4.97 MiB  |
| HTTP Mean Latency      | 131 ms    |
| HTTP P95 Latency       | 131 ms    |
| HTTP                   | 0 req/min |
+------------------------+-----------+
 Divergent env variables from local env
+------------------------------------------------------------------+
| SUDO_COMMAND x /usr/local/bin/pm2 start /etc/nginx/pm2.config.js |
+------------------------------------------------------------------+

 Add your own code metrics: http://bit.ly/code-metrics
 Use `pm2 logs Node.js script(3000) [--lines 1000]` to display logs
 Use `pm2 env 0` to display environment variables
 Use `pm2 monit` to monitor CPU and Memory usage Node.js script(3000)

● pm2.service - PM2 process manager
     Loaded: loaded (/etc/systemd/system/pm2.service; enabled; preset: enabled)
     Active: activating (start) since Thu 2026-10-08 12:10:12 JST; 2s ago
        Job: 12260
 Invocation: 9b2d212827c14d80a70a824a3f01c21b
       Docs: https://pm2.keymetrics.io/
  Cntrl PID: 3449 (node)
      Tasks: 14 (limit: 806)
        CPU: 2.792s
     CGroup: /system.slice/pm2.service
             tq3449 node /usr/lib/node_modules/pm2/bin/pm2 /etc/nginx/pm2.config.js
             mq3456 /usr/bin/node /usr/lib/node_modules/pm2/lib/Daemon.js

Oct 08 12:10:12 ns.example.com systemd[1]: pm2.service: Scheduled restart job, restart counter is at 95.
Oct 08 12:10:12 ns.example.com systemd[1]: Starting pm2.service - PM2 process manager...
Oct 08 12:10:14 ns.example.com pm2[3449]: [PM2] Spawning PM2 daemon with pm2_home=/root/.pm2