Variable Precedence & .tfvars: Who Wins the Override War? When Multiple Sources Compete for the Same Variable Terraform lets you set variable values from numerous sources simultaneously — defaults, files, command-line flags, environment variables. They don’t all have equal weight.…

Variables & Outputs: Making Configuration Reusable Hardcoded Configs Are Dead on Arrival A Terraform config with hardcoded values — a specific AMI ID, a specific instance type, a specific region — is a one-time-use script. It works for a lab…

Resources & Data Sources: The Building Blocks Two Fundamental Block Types — And They Solve Different Problems Everything you do in Terraform comes down to two block types. Understanding when to use each one — and what happens when you…

terraform fmt, validate & destroy — The Cleanup Crew terraform fmt — Why Formatting Matters More Than You Think HCL has an official canonical format. terraform fmt enforces it automatically — consistent indentation, aligned = signs, normalized whitespace. terraform fmt…

terraform plan & terraform apply — Reading the Diff Like a Pro terraform plan — The Safety Net You Should Never Skip Never run terraform apply without understanding what it’s about to do. terraform plan is the dry run —…