Web Servers with HAProxy for Failover

Two web servers will be load-balanced using HAProxy.

Prerequisites

Two web servers with static IPs.
HAProxy installed on a load balancer server.

Step-by-Step Guide

Step 1: Install Apache or Nginx on Web Servers

1. Install Apache or Nginx:

sudo apt install apache2 -y

Step 2: Install and Configure HAProxy on the Load Balancer

1. Install HAProxy:

sudo apt install haproxy -y

2. Configure HAProxy:

sudo nano /etc/haproxy/haproxy.cfg

HAProxy Configuration:

frontend http_front
    bind *:80
    default_backend web_servers

backend web_servers
    balance roundrobin
    server web1 <WEB1_IP>:80 check
    server web2 <WEB2_IP>:80 check backup

3. Restart HAProxy:

sudo systemctl restart haproxy

Step 3: Verify HAProxy Load Balancing and Failover

1. Shut down one of the web servers to confirm that traffic fails over to the other.

Clusters