Integrating Infrastructure as Code with CI/CD#

Running Terraform locally works for one person. It breaks down when multiple people (or agents) modify infrastructure concurrently, when changes need review before applying, and when environments (dev/staging/prod) need synchronized promotion. CI/CD pipelines solve this by making the plan-review-apply cycle automated, auditable, and safe.

This article covers the patterns for integrating Terraform into CI/CD — from the basic plan-on-PR flow to multi-directory monorepos with dependency ordering and environment promotion.