Cloud Advanced

Terraform Modules¶

TerraformModulesIaC 3 min read

Reusable Terraform modules. Structure, registry and best practices.

Custom Module¶

# modules/vpc/main.tf
variable "cidr" { default = "10.0.0.0/16" }
resource "aws_vpc" "main" {
  cidr_block = var.cidr
  tags = { Name = var.name }
}
output "vpc_id" { value = aws_vpc.main.id }

# Usage
module "vpc" {
  source = "./modules/vpc"
  cidr   = "10.0.0.0/16"
  name   = "production"
}

Registry Modules¶

module "eks" {
  source  = "terraform-aws-modules/eks/aws"
  version = "~> 20.0"
  cluster_name    = "my-cluster"
  cluster_version = "1.29"
}

Summary¶

Modules = DRY principle for infrastructure. Use registry modules where possible, custom ones for specific logic.

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