AWS Auto-Scaling Infrastructure
Production-ready infrastructure with Terraform demonstrating AWS scaling patterns
┌─────────────────────────────────────────────────────────┐
│ VPC │
│ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Public Subnet │ │ Public Subnet │ │
│ │ AZ-1a │ │ AZ-1b │ │
│ │ ┌───────┐ │ │ ┌───────┐ │ │
Internet ──► ALB ──►│ │ │ EC2 │ │ │ │ EC2 │ │ │
│ │ └───────┘ │ │ └───────┘ │ │
│ └─────────────────┘ └─────────────────┘ │
│ │ │ │
│ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Private Subnet │ │ Private Subnet │ │
│ │ AZ-1a │ │ AZ-1b │ │
│ │ ┌───────┐ │ │ ┌───────┐ │ │
│ │ │ RDS │◄────┼───────┼───│ RDS │ │ │
│ │ │Primary│ │ │ │Standby│ │ │
│ │ └───────┘ │ │ └───────┘ │ │
│ └─────────────────┘ └─────────────────┘ │
└─────────────────────────────────────────────────────────┘
🌐 VPC Module
- Multi-AZ architecture
- Public & private subnets
- NAT Gateway
- VPC Flow Logs
⚖️ ALB Module
- Application Load Balancer
- Health checks
- S3 access logs
- Target groups
📈 ASG Module
- 6 scaling policies
- Launch templates
- Warm pools
- Instance refresh
🗄️ RDS Module
- MySQL 8.0
- Multi-AZ support
- Read replicas
- Performance Insights
Scaling Policies Implemented
| Policy Type | Description | Trigger |
|---|---|---|
| Target Tracking (CPU) | Maintains target CPU utilization | CPU at 70% |
| Target Tracking (ALB) | Scales based on request count | 1000 req/target |
| Step Scaling (Out) | Aggressive scale-out for spikes | CPU > 70%/80% |
| Step Scaling (In) | Gradual scale-in when idle | CPU < 30% |
| Scheduled Scaling | Time-based capacity changes | Business hours |
| Predictive Scaling | ML-based forecasting | Traffic patterns |
Quick Start
Validate configuration
terraform init && terraform validate
Preview infrastructure (no AWS account needed)
terraform plan -var-file="environments/dev/terraform.tfvars" -var="db_password=demo" -var="use_localstack=true"
Resources created
Plan: 49 to add, 0 to change, 0 to destroy