Infrastructure as a Code¶

Infrastructure as a Code Defined¶

Provisioning infrastructure through software to achieve consistent and predictable environments

Core Concepts¶

Defined in code
Stored in source control
Declarative or imperative
Idempotent and consistent
Push or pull

Declarative vs Imperative¶

Terraform is a declarative approach to deploying infrastructure as code

# Make me a taco
food taco "bean-taco" {
ingredients = [
"beans", "cheese", "lettace", "salsa"
]
}

Idempotence and Consistency¶

If you haven't changed anything about your configuration and you apply it again to the same environment, nothing will change in the environment, because your defined configuration matches the reality of the infrastructure that exists.

Push or Pull¶

Terraform is a push-type model, the configuration that terraform has is getting pushed to the target environment.

IaC Benefits¶

Automated deployment
Consistent environment
Repeatable process
Reusable components
Documented architecture