Load Balancer Configurator
FlaggedConfigures Nginx, HAProxy, and AWS ALB load balancers with health checks, SSL termination, and traffic routing rules.
$ Copy the SKILL.md file to your project's .claude/skills/ directory About This Skill
Load Balancer Configurator generates complete, production-tested load balancer configurations for the three most common scenarios: Nginx as a reverse proxy, HAProxy for TCP/HTTP load balancing, and AWS Application Load Balancer via Terraform.
Nginx Configuration
- Generates complete server blocks with:
- Upstream groups with load balancing algorithms (round-robin, least_conn, ip_hash)
- Health checks (`max_fails`, `fail_timeout`)
- SSL termination with modern cipher suites and HSTS
- Gzip compression and static asset caching
- Rate limiting integration (`limit_req_zone`)
- Proxy headers (`X-Real-IP`, `X-Forwarded-For`, `X-Forwarded-Proto`)
HAProxy Configuration
- Frontend binds with ACL rules
- Backend server groups with health checks
- Stick-tables for session persistence
- Admin socket for runtime server management
- Stats page configuration
AWS ALB (via Terraform)
- ALB resource with security groups
- Target group with configurable health check path, interval, and thresholds
- HTTPS listener with ACM certificate ARN
- HTTP → HTTPS redirect listener
- Path-based and host-based listener rules
- Target group attachments for EC2 instances or ECS services
Advanced Patterns
- Blue-Green Switching — weighted target groups for gradual traffic shift
- Canary Deployment — 5% → 10% → 50% → 100% traffic migration rules
- Sticky Sessions — cookie-based affinity for stateful applications
Use Cases
- Setting up Nginx as a reverse proxy and load balancer for multiple application instances
- Configuring HAProxy for high-availability database connection pooling
- Creating AWS ALB listener rules with path-based and host-based routing
- Implementing blue-green deployment traffic switching with weighted routing
Pros & Cons
Pros
- +Three load balancer technologies in one skill — Nginx, HAProxy, AWS ALB
- +SSL configuration uses modern cipher suites with HSTS
- +Blue-green and canary deployment patterns included
- +Terraform output for AWS ALB enables IaC workflow
Cons
- -Test all configuration changes in staging — incorrect routing can cause production downtime
- -SSL certificate provisioning must be done separately before configuration can be applied
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FAQ
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