HTTP 404 with Nodejs app on ubuntu 18.04 AWS 伺服器，執行 Nginx 反向

Question

经过全面测试后，我已经将我的 Nodejs (10.16( 应用程序迁移到运行 Nginx (17.4( 反向代理的 AWS ubuntu 18.04。我遇到的问题是前端 React Native 请求有 http 404。这是我前端的日志输出：

[12:50:39] I | ReactNativeJS ▶︎ 'response in signup: ', { type: 'default',
│ status: 404,  //<<<=== Server Not Found
│ ok: false,
│ statusText: undefined,
│ headers:
│ { map:
│ { connection: 'keep-alive',
│ 'content-length': '153',
│ 'content-type': 'text/html',
│ date: 'Wed, 09 Oct 2019 19:50:40 GMT',
│ server: 'nginx/1.17.4' } },  //<<<=== Nginx 
│ url: 'http://my-aws-public-ip/api/users/signup', //<<<=== request URL

以下是使用node index.js在 ubuntu 服务器上启动应用程序后的日志输出：

Listening on port 3000...
Executing (default): SELECT 1+1 AS result
DB connection has been established successfully.

此处，服务器正在侦听端口3000，并且已成功建立数据库连接。

这是/etc/nginx/sites-available/下default的nginx代理配置文件：

$cat /etc/nginx/sites-available/default
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://127.0.0.1:3000;
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;
}
}

以下是nodejs应用程序中的db.js：

const Sql = require("sequelize");
const db = new Sql('emps', 'postgres', `${process.env.DB_PASSWORD}`, {
host: 'localhost',
dialect: 'postgres',
port:5432,
} );
db
.authenticate()
.then(() => {
console.log('DB connection has been established successfully.');
})
.catch(err => {
console.error('Unable to connect to the database:', err);
});
module.exports = db;

以下是索引的结尾.js：

server.listen(port, () => {  //port=3000
//logger('info', `Listening on port ${port}...`);
console.log(`env var: ${process.env.jwtPrivateKey}`)
console.log(`Listening on port ${port}...`);
});

这是routes.js：

module.exports = function(app, io) {
app.use(helmet());
app.use(compression());
app.use(express.json());
app.use('/api/events', events);
app.use('/api/messages', messages);
app.use('/api/users', users);
app.use('/api/groups', groups);
app.use('/api/contacts', contacts);
app.use('/api/groupmembers', groupmembers);
app.use('/api/sms', smsverif);
app.use(error);
}

在 AWS 安全组上，将为所有流量打开入站TCP port 80, 22, 443 and 3000。导致 http 404 的配置中缺少什么？

Answer 1

试试这个 nginx 的配置

server {
listen 80;
server_name localhost your-aws-public-ip default_server;
location / {
proxy_pass http://127.0.0.1:3000;
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;
}
}

Answer 2

事实证明，在/etc/nginx/nginx.conf中，缺少一个include /etc/nginx/sites-available/*。反向代理配置必须首先包含在nginx.conf中。