How to Set Up Nginx as a Reverse Proxy Server for PM2 on Rocky Linux 9

To Set Up Nginx as a Reverse Proxy Server for PM2 on Rocky Linux 9, follow the steps below.

Step 1 : Update

sudo dnf update

Step 2 : Install Nginx

sudo dnf install nginx

Step 3 : Create a New Configuration for the App (example.com)

Create a new Nginx configuration file for your app, for example, /etc/nginx/conf.d/example.com.conf, and add the following content:

server {
    listen 80;
    server_name example.com www.example.com;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        
        proxy_pass http://localhost:your_pm2_app_port;
        proxy_redirect off;
        proxy_read_timeout 240s;
    }
}

Replace your_pm2_app_port with the actual port your PM2 app is running on.

Step 4 : Test the Configuration

sudo nginx -t

If the test is successful, you will see a message indicating that the configuration file syntax is okay.

Step 5 : Restart Nginx

sudo systemctl restart nginx

Step 6 : If SELinux is Enabled, Allow Nginx to Connect to the Network

sudo setsebool -P httpd_can_network_connect true

Step 7 : Visit the Domain to Verify the Results

Open a web browser and navigate to your domain (e.g., http://example.com). Ensure that the application is accessible through Nginx.

Congratulations! You have successfully set up Nginx as a reverse proxy server for your PM2 app on Rocky Linux 9.