Manual cloud configuration through web consoles is an anti-pattern that guarantees configuration drift and security vulnerabilities. Infrastructure as Code (IaC) using Terraform or the open-source OpenTofu foundation ensures declarative, repeatable, and peer-reviewed cloud deployments.
State File Management & Security
The state file is the crown jewel of your IaC architecture, recording every resource ID and sensitive secret. Never commit state files to Git. Store them in encrypted S3/GCS buckets with mandatory state locking via DynamoDB to prevent race conditions.
5 Rules of Modular IaC Design
- Atomic Module Scoping: Keep modules focused on single infrastructure domains (e.g., VPC, EKS Cluster, RDS Database).
- Strict Semantic Versioning: Pin third-party provider and internal module versions to avoid unexpected breaking changes during CI runs.
- Automated Security Scanning: Integrate Trivy and Checkov into Pull Request workflows to catch open security groups and unencrypted disks before deployment.