terraform Concepts
Step-by-step explanations, real-world issues, and simplified understanding. Master every angle — from foundational concepts to real-world troubleshooting.
What we cover
Interactive guides & progressions
In-depth technical readings
Run Terraform safely in production — automating plan and apply through GitHub Actions and Atlantis, managing secrets, detecting drift, and applying governance at scale.
Platform terminology defined
Written guides that show you how to apply this concept in real projects.
Key words used in this concept — explained simply, no jargon.
A Terraform provider is a plugin that gives Terraform the ability to create, read, update, and delete resources in a specific platform — such as AWS, GCP, Azure, or GitHub. Each provider translates your HCL configuration into real API calls for that platform.
A Terraform resource is a block of HCL configuration that declares one piece of infrastructure — like an EC2 instance, an S3 bucket, or a DNS record. Terraform creates, updates, and deletes the real-world object to match the resource declaration.
The terraform.tfstate file is a JSON file that Terraform uses to track the real-world infrastructure it has created. It maps each resource in your configuration to its actual ID in the cloud provider — like an EC2 instance ID or an S3 bucket name.
The terraform plan command shows you exactly what Terraform will create, change, or destroy before it does anything. It reads your configuration files, compares them to the current state file, and prints a diff — giving you a safe preview before you apply.
Terraform in Production — CI/CD, Secrets, and Governance covers a variety of key topic guides, including: Terraform CI/CD — Automating Plan and Apply with GitHub Actions, Atlantis — Pull Request Automation for Terraform Teams, Terraform Drift Detection — Finding and Fixing Infrastructure That Changed. Run Terraform safely in production — automating plan and apply through GitHub Actions and Atlantis, managing secrets, detecting drift, and applying governance at scale.
Terraform in Production — CI/CD, Secrets, and Governance is a core learning conceptual pillar mapped within the terraform engineering hub of the DevOps Network.
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