Infrastructure as code (IaC)

Infrastructure as Code is a transformative approach to IT management that treats servers, networks, and databases as if they were software. Instead of manually logging into cloud consoles or physical servers to change settings, engineers write code that describes the desired state of the infrastructure. Tools like Terraform or CloudFormation then read this code and automatically provision the necessary resources. This ensures that environments (such as development, staging, and production) are identical.

By using IaC, organizations gain the benefits of version control for their hardware setups. Every change to the infrastructure is documented in a code commit, providing a clear audit trail and the ability to roll back to a previous state if something goes wrong. This programmability also enables "immutable infrastructure," where instead of patching old servers, new ones are spun up from a clean code definition and the old ones are decommissioned. This reduces configuration drift and significantly increases the speed and reliability of deploying complex, multi-tiered applications.