Backend & systems·Deployment, release and rollback
you change the load balancer by editing a file and opening a pull request, not by clicking around in a console.
Infrastructure as code
Also calledIaC, Terraform
Declaring infrastructure in version-controlled files applied by tooling. It gives review, history, and the ability to recreate an environment. The gap to watch is between declared and actual state: manual changes make the next apply either a no-op that lies or a surprise that reverts something load-bearing.