Learn Terraform from Scratch - 2025

Learn how to pass credentials to providers like AWS, GCP, or Kubernetes using provider authentication configurations, environment variables, or files, avoiding hard-coded secrets.

Learn to use additional options in Terraform commands, concatenate local values with prefixes or suffixes, ensure unique resource names, and run targeted apply or destroy with auto-approve.

Learn how Terraform's resource lifecycle controls create, destroy, and replacement behavior. Use lifecycle blocks like create_before_destroy and prevent_destroy to safely rename resources and retain or replace them as needed.

Learn how Terraform state locking works with an S3 backend, using DynamoDB for a lock table to prevent concurrent changes, and how to manage, initialize, and release locks.

Discover built-in Terraform functions across numeric, string, and list categories, including upper and lower transforms. Test them in the Terraform console for real-world naming and data handling.

Explore Terraform variables using the variable block, define descriptions, types, and defaults, and reference them as var.name in code, comparing with locals and understanding dynamic input during plan.

Use a conditional statement in Terraform to create dynamic bucket names and counts based on environment variables. The ternary style chooses values for prod and non prod.

Master terraform validate to catch syntax errors before init, plan, or apply, and use terraform format with --recursive to format code across nested folders for better linting.

Learn to debug Terraform code by setting TF_LOG to trace, debug, or error, export logs with TF_LOG_PATH, and diagnose plan outputs and expired credentials.