Infrastructure Automation
Terraform-managed AWS infrastructure for multi-environment deployments with full observability and zero-downtime deploys.
Overview
End-to-end infrastructure management using Terraform for a production SaaS platform. Covers three environments (dev, staging, production) with shared module patterns, remote state, and full CI/CD integration.
Design principles
State isolation. Each environment uses a separate Terraform workspace with remote state in S3 and DynamoDB locking. Prevents state corruption from concurrent runs.
Module reuse. Core infrastructure components (VPC, ECS cluster, RDS, ALB) are abstracted into reusable modules. Environment configs override only what differs, keeping duplication minimal.
Zero-downtime deploys. ECS services use rolling updates with health check grace periods. Blue/green capability at the ALB level for critical services requiring instant rollback.
Stack breakdown
- Compute: ECS Fargate — no server management, easy horizontal scaling
- Database: RDS PostgreSQL with automated backups and read replicas
- Networking: VPC with public/private subnets, NAT Gateway, Security Groups
- Secrets: AWS Secrets Manager integrated with ECS task definitions
- CI/CD: GitHub Actions runs
terraform planon PRs,applyon merge to main
Observability
CloudWatch dashboards, application-level metrics via a sidecar, and Slack alerting on deployment events and alarm state changes.