Load Balancer

A simple HTTP load balancer implemented in Go with round-robin distribution and automatic health checking.

Features

• Round-robin load balancing across multiple backend servers
• Automatic health checks (every 10 seconds)
• Instant failure detection and retry on next available backend
• Graceful handling when backends go down/come back up

Usage

go run main.go

The load balancer starts on port 8080 and distributes traffic to backends defined in main.go.

Testing

Start test backend servers:

cd testserver && go run main.go 8081
cd testserver && go run main.go 8082
cd testserver && go run main.go 8083

Send requests:

curl http://localhost:8080

How It Works

1. Receives incoming requests on port 8080
2. Selects next healthy backend using round-robin algorithm
3. Proxies request to selected backend
4. If backend fails, immediately tries next available backend
5. Health checks run every 10 seconds to detect recovered backends