NGINX PM2 VPS: Build a high-performance web server

NGINX PM2 VPS: Building a high-performance web server

In recent years, with the development of the Internet, the performance requirements of web servers have become higher and higher. To meet these needs, developers continue to explore new technologies and tools. In this article, we will introduce how to use NGINX, PM2 and VPS to build a high-performance web server, with specific code examples.

1. NGINX
   NGINX is a high-performance web server and reverse proxy server. It is designed to handle large numbers of concurrent connections with excellent performance. Compared with the traditional Apache server, NGINX is more lightweight and can handle more concurrent requests.

Before installing NGINX, we need to ensure that Node.js and npm have been installed on the VPS. It can be installed through the following command:

sudo apt update
sudo apt install nodejs
sudo apt install npm

After installing Node.js and npm, we can use npm to install PM2, which is a process manager for managing Node.js applications. You can use the following command to install:

sudo npm install pm2 -g

2. PM2
   PM2 can help us manage and monitor Node.js applications. It can automatically restart the application, ensuring that the application can continue to run if it crashes. In addition, PM2 also provides logging and process monitoring functions.

Suppose we already have a Node.js application, and the entry file of the application is app.js. We can run the application using PM2 using the following command:

pm2 start app.js

By running the above command, we can ensure that the Node.js application runs automatically after the server starts and has the ability to automatically restart.

3. NGINX configuration reverse proxy
   In order to forward all requests to the Node.js application, we need to add a reverse proxy in the NGINX configuration. First, we need to edit the NGINX configuration file, which can be edited with the following command:

   sudo nano /etc/nginx/nginx.conf

In the configuration file, we need to add the following content:

http {
    server {
        listen 80;
        server_name your_domain.com;

        location / {
            proxy_pass http://localhost: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;
        }
    }
}

In the above In the configuration, we forward all requests to the local port 3000, which is the port where our Node.js application runs.

After completing the configuration, you can restart NGINX with the following command:

sudo service nginx restart

Now, we have successfully configured NGINX as a reverse proxy and can use PM2 to manage our Node.js application program.

Summary
In this article, we introduced how to use NGINX, PM2 and VPS to build a high-performance web server. By using NGINX as a reverse proxy, concurrent connections can be better managed and provide better performance. In addition, by using PM2 we can ensure that our Node.js application can automatically recover after a server crash.

I hope this article is helpful to you and can help you build a high-performance web server. If you have any questions about the code examples or need more guidance, feel free to ask in the comments.

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