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

To set up Nginx as a reverse proxy server for PM2 on CentOS Stream 10, follow the steps below.

Step 1 : Begin by updating your system to ensure all packages are up to date. Use the following command:

sudo dnf update -y

Step 2 : Install Nginx on your server by running:

sudo dnf install nginx -y

Start and enable the Nginx service:

sudo systemctl start nginx
sudo systemctl enable nginx

Step 3 : Allow HTTP and HTTPS traffic through the firewall by running the following commands:

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

Step 4 : Create a new Nginx configuration file for your app. Replace example.com with your domain name:

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

Add the following content, replacing example.com and 127.0.0.1:3000 with your actual domain and PM2 app port:

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

Save and close the file.

Step 5 : Before restarting Nginx, test the configuration to ensure there are no syntax errors:

sudo nginx -t

If the output shows no errors, proceed to the next step.

Step 6 : Reload Nginx to apply the changes:

sudo systemctl restart nginx

Step 7 : If SELinux is enabled on your system, allow Nginx to connect to your PM2 application by running:

sudo setsebool -P httpd_can_network_connect true

Step 8 : Verify the Setup

Visit your domain (http://example.com) in a web browser to check if your application is accessible through Nginx.

Congratulations! You have successfully set up Nginx as a reverse proxy server for PM2 on CentOS Stream 10.