Terraform
Write your cloud infrastructure as code. The industry-standard IaC tool — used by 90% of cloud teams.
What is Terraform, really?
Terraform lets you describe your AWS / Azure / GCP infrastructure in HCL (HashiCorp Configuration Language) and apply it with one command. Need a VPC, 3 EC2s, an RDS, an ALB and 12 IAM roles? That's 200 lines of Terraform — and you can spin up an identical copy in another region with one variable change.
Terraform replaced 'ClickOps' for serious cloud teams 5+ years ago. In 2026, writing Terraform is no longer optional — it's the baseline expectation for any cloud / DevOps role above L2.
At Cloudadhar we teach Terraform the way I write it in production: module-based, remote-state with locking, drift detection, policy-as-code with OPA / Sentinel, and a proper PR-driven workflow with terraform plan in CI.
What makes it special
- Single language for AWS, Azure, GCP, Kubernetes, Datadog, GitHub — 4,000+ providers
- Declarative — you describe the goal, Terraform figures out the order
- Plan-before-apply gives you a dry-run preview of every change
- State file is the brain — supports remote backends (S3, Azure Blob, GCS, Terraform Cloud)
- Modules let you package + reuse infrastructure patterns across teams
When you should reach for it
- You're spinning up cloud resources more than once
- You need identical dev / staging / prod environments
- You want every infra change to go through a Git PR
- You're scaling a team and want to delete tribal knowledge
- You're moving from one cloud to another (Terraform = abstraction layer)
A real Terraform story from production
“On one engagement we inherited an AWS account with 200+ resources created entirely through the console. Nobody knew what was costing what. We spent a month writing terraform import + refactoring into modules. Outcome: full IaC parity, a 22% monthly bill reduction (we found 18 idle RDS instances), and a clean PR-driven workflow. The CFO emailed asking what magic we'd done. The answer was 'terraform plan, every time'.”
— Gangadhar, 12+ yrs in production cloud
How to actually learn Terraform
- 1Install Terraform + write your first .tf file (an S3 bucket, an EC2)
- 2Learn variables, outputs, locals, data sources
- 3Move state to S3 + DynamoDB for locking (never commit state to Git)
- 4Refactor into modules — start with a 'vpc' module + 'app' module
- 5Multi-environment with workspaces OR per-env directories (we prefer the latter)
- 6Add terraform plan in CI (GitHub Actions / GitLab CI) — block PRs that destroy prod
- 7Pass the HashiCorp Terraform Associate (TA-004) cert
Want to learn Terraform production-style?
Live batches, 1:1 mentorship, hands-on labs in a real cloud account. No slideware. No fluff. Just the playbooks I use as a DevSecOps Lead.
