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What is Terraform?

An open-source tool for provisioning and managing cloud infrastructure using declarative configuration files.

Terraform by HashiCorp uses HCL (HashiCorp Configuration Language) to define infrastructure across multiple cloud providers. You describe the desired state, and Terraform figures out the steps to achieve it.

Key concepts include providers (AWS, Azure, GCP), resources, state management, modules (reusable configurations), and plan/apply workflow. Terraform state tracks what infrastructure exists and manages changes safely.

Related Terms

Infrastructure Drift
The divergence between the actual state of infrastructure and its defined desired state, caused by manual changes or untracked modifications.
Artifact
A packaged, versioned output of a build process — such as a Docker image, JAR file, or compiled binary — ready for deployment.
CI/CD
Continuous Integration and Continuous Deployment — automated practices for building, testing, and deploying code changes.
Continuous Deployment
A practice where every code change that passes automated tests is automatically deployed to production.
Feature Flag
A technique that allows enabling or disabling features in production without deploying new code, enabling safe rollouts and A/B testing.
Configuration Management
The practice of systematically managing and maintaining consistent server configurations across infrastructure.
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