What Is Infrastructure as Code?

What Is IaC?

Infrastructure as Code (IaC) is the practice of managing cloud infrastructure — servers, networks, databases, load balancers — through machine-readable definition files, NOT manual clicking or ad-hoc scripts.

Instead of logging into Azure Portal to click Create a Virtual Machine, you write:

resource "azurerm_virtual_network" "main" {
  name          = "my-network"
  address_space = ["10.0.0.0/16"]
  location      = "East US"
}

And run terraform apply to provision it.

Why IaC?

Manual vs IaC

Your Turn!

Write down which parts of your infrastructure setup process are currently manual. For each one, describe what the IaC equivalent would look like.