Creating Production-Grade Infrastructure with Terraform

The Gap Between "It Works" and "It's Production-Ready" Day 16 of the 30-Day Terraform Challenge — and today I learned that my "working" infrastructure was nowhere near production-ready. I had a webserver cluster. It deployed. It served traffic. I was proud of it. Then I ran it against a production-grade checklist. The result was humbling. The Production-Grade Checklist I audited my infrastructure against 5 categories: Category Score What I Was Missing Structure 80% Some hardcoded values Reliability 60% No prevent_destroy , no wait timeouts Security 70% SSH open to world, no validation Observability 30% No consistent tags, no alarms Maintainability 90% Missing input validation The gap was significant. Here's how I closed it. Refactor 1: Consistent Tagging Before: Tags scattered across resources, inconsistent. tags = { Name = "${var.cluster_name}-instance" Environment = var . environment } After: Centralized tags with locals and merge() . locals { common_tags = { Environment = var . envi