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🚀 NGINX Load Balancer Configuration

📌 Overview​

This configuration sets up NGINX as a load balancer to distribute traffic among multiple backend servers.

🛠️ Configuration​

http {
    upstream backend {
        server backend1.example.com:80;  # 🖥️ Backend Server 1
        server backend2.example.com:80;  # 🖥️ Backend Server 2
        server backend3.example.com:80;  # 🖥️ Backend Server 3
    }

    server {
        listen 80;
        server_name example.com;  # 🌎 Your Domain

        location / {
            proxy_pass http://backend;  # 🔀 Load Balancing to Backends
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }
}

✅ Testing the Load Balancer​

1⃣ Check NGINX Configuration​

Run the following command to ensure there are no syntax errors:

nginx -t

If everything is correct, you should see:

nginx: configuration file /etc/nginx/nginx.conf test is successful

2⃣ Restart NGINX​

Apply the changes by restarting NGINX:

systemctl restart nginx  # For Linux (systemd)
service nginx restart    # Alternative method

3⃣ Verify Load Balancing​

Use curl or a browser to send requests:

curl -I http://example.com

Refresh multiple times to see different responses from backend servers.

4⃣ Check Logs​

Monitor logs to verify traffic distribution:

tail -f /var/log/nginx/access.log

🚀 Your NGINX Load Balancer is now ready!