load-balancer-setup
Configure and deploy load balancers (HAProxy, AWS ELB/ALB/NLB) for distributing traffic, session management, and high availability.
What this skill does
# Load Balancer Setup
## Table of Contents
- [Overview](#overview)
- [When to Use](#when-to-use)
- [Quick Start](#quick-start)
- [Reference Guides](#reference-guides)
- [Best Practices](#best-practices)
## Overview
Deploy and configure load balancers to distribute traffic across multiple backend servers, ensuring high availability, fault tolerance, and optimal resource utilization across your infrastructure.
## When to Use
- Multi-server traffic distribution
- High availability and failover
- Session persistence and sticky sessions
- Health checking and auto-recovery
- SSL/TLS termination
- Cross-region load balancing
- API rate limiting at load balancer
- DDoS mitigation
## Quick Start
Minimal working example:
```conf
# /etc/haproxy/haproxy.cfg
global
log stdout local0
log stdout local1 notice
maxconn 4096
daemon
# Security
tune.ssl.default-dh-param 2048
ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256
ssl-default-bind-options ssl-min-ver TLSv1.2
defaults
log global
mode http
option httplog
option denylogin
option forwardfor
option http-server-close
# Timeouts
timeout connect 5000
timeout client 50000
timeout server 50000
// ... (see reference guides for full implementation)
```
## Reference Guides
Detailed implementations in the `references/` directory:
| Guide | Contents |
|---|---|
| [HAProxy Configuration](references/haproxy-configuration.md) | HAProxy Configuration |
| [AWS Application Load Balancer (CloudFormation)](references/aws-application-load-balancer-cloudformation.md) | AWS Application Load Balancer (CloudFormation) |
| [Load Balancer Health Check Script](references/load-balancer-health-check-script.md) | Load Balancer Health Check Script |
| [Load Balancer Monitoring](references/load-balancer-monitoring.md) | Load Balancer Monitoring |
## Best Practices
### ✅ DO
- Implement health checks
- Use connection pooling
- Enable session persistence when needed
- Monitor load balancer metrics
- Implement rate limiting
- Use multiple availability zones
- Enable SSL/TLS termination
- Implement graceful connection draining
### ❌ DON'T
- Allow single point of failure
- Skip health check configuration
- Mix HTTP and HTTPS without redirect
- Ignore backend server limits
- Over-provision without monitoring
- Cache sensitive responses
- Use default security groups
- Neglect backup load balancers
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