NGINX PM2 VPS: Build a reliable application service cluster architecture

NGINX PM2 VPS: To build a reliable application service cluster architecture, specific code examples are required

Foreword:
With the rapid development of the Internet, application development and server Deployment is becoming increasingly important. Building a reliable application service cluster architecture is the key to ensuring application performance and availability. In this article, we will introduce how to use NGINX, PM2 and VPS to build a reliable application service cluster architecture, and provide specific code examples.

Part One: Overview

Before we begin, let us first understand the concepts of NGINX, PM2 and VPS.

1. NGINX (pronounced "engine X") is a high-performance open source HTTP and reverse proxy server. It is capable of handling high traffic and provides good performance and reliability.
2. PM2 is a modern Node.js application process manager. It allows you to run and manage multiple Node.js applications in a background manner and provides features such as logging, monitoring, and automatic restart.
3. VPS stands for Virtual Private Server and is a virtual server based on cloud technology. It can provide similar functionality as a physical server but is more flexible and scalable.

Now that we understand these concepts, let’s move on to see how they fit together to build a reliable application service cluster architecture.

Part 2: Configuring NGINX

First, we need to configure NGINX as the load balancer of our application service cluster. Open the NGINX configuration file and add the following configuration:

http {
    upstream app_servers {
        server 127.0.0.1:3000;
        server 127.0.0.1:3001;
        server 127.0.0.1:3002;
    }
    
    server {
        listen 80;
        
        location / {
            proxy_pass http://app_servers;
        }
    }
}

In the above configuration, we defined an upstream block named "app_servers", which contains the IP address and port number of the application server. We then used the "proxy_pass" directive in the main server block to forward requests to these application servers.

After saving and closing the NGINX configuration file, restart the NGINX service to make the configuration take effect.

Part 3: Use PM2 to manage Node.js applications

Next, we need to use PM2 to manage our Node.js applications. After installing PM2, open a terminal and go to your application directory, run the following command to start the application:

pm2 start app.js -i max

In the above command, "app.js" is the entry file for your Node.js application , while "-i max" will create as many Node.js instances as possible to handle the request.

After starting the application, you can use the following command to view the status of the application:

pm2 list

In this way, you can ensure that the application is always running and can be accessed via PM2 Manage and monitor them.

Part 4: Configuring VPS

Finally, we need to configure the VPS to support our application service cluster. On the VPS, we need to install NGINX and PM2 and deploy our application to the VPS.

The method of installing NGINX and PM2 on the VPS is similar to the method of installing them locally. You can install it by following the steps provided in the official documentation.

Once the installation is complete, you will need to update NGINX's configuration file to point to the IP address and port number of your VPS. Then run the following command to start your application:

pm2 start app.js -i max

In this way, your application will run in a clustered manner on the VPS, with NGINX acting as a load balancer to manage the traffic.

Conclusion:

By combining NGINX, PM2 and VPS, we can build a reliable application service cluster architecture to provide high performance and reliability. With NGINX as a load balancer, we can distribute requests evenly from multiple application servers. Using PM2 to manage Node.js applications ensures that the application is always running and has monitoring and automatic restart capabilities. Finally, by deploying applications on VPS, we can provide high reliability and scalability application services.

I hope this article is helpful in building a reliable application service cluster architecture and provides some practical code examples. By leveraging NGINX, PM2, and VPS, you can better manage and scale your applications to meet growing user demands. I wish your application will run smoothly under the cluster architecture!

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