AlmaLinux 10

How to Set Up Nginx as a Reverse Proxy Server for PM2 on AlmaLinux 10

To set up Nginx as a reverse proxy server for PM2 on AlmaLinux 10, configure Nginx to forward incoming HTTP requests to a Node.js application managed by PM2.

Step 1 : Update system packages.

sudo dnf update -y

Step 2 : Install Nginx using the package manager.

sudo dnf install nginx -y

Enable and start the Nginx service:

sudo systemctl enable nginx
sudo systemctl start nginx

Step 3 : Allow HTTP and HTTPS traffic through the firewall.

sudo firewall-cmd --permanent --add-service=http
sudo firewall-cmd --permanent --add-service=https
sudo firewall-cmd --reload

Step 4 : Create a new server block configuration for the application domain.

sudo nano /etc/nginx/conf.d/example.com.conf

Example configuration:

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:3000;
        proxy_redirect off;
        proxy_read_timeout 240s;
    }
}

Save and close the file.

Step 5 : Test the Nginx configuration for syntax errors.

sudo nginx -t

Step 6 : Apply the new configuration.

sudo systemctl restart nginx

Step 7 : If SELinux is enabled, allow Nginx to connect to the Node.js application.

sudo setsebool -P httpd_can_network_connect true

Step 8 : Open a browser and access the domain:

http://example.com

The application managed by PM2 should now be accessible through Nginx.

Congratulations, you have successfully set up Nginx as a reverse proxy server for PM2 on AlmaLinux 10.