How do you consume a versioned module from a VCS or the Terraform Registry?

Difficulty: unrated

Source: bregman-arie/devops-exercises by Arie Bregman

Answer

module "vpc" {
  source  = "git::https://github.com/org/infra-modules.git//vpc?ref=v1.2.3"
  cidr    = "10.0.0.0/16"
  azs     = ["us-east-1a", "us-east-1b"]
}

For registry modules, use version constraints (for example version = ">= 1.2.0, < 2.0.0").
Always pin module versions to keep plans reproducible and review upstream releases before upgrading.
Prefer tags or immutable SHAs for VCS sources to guarantee repeatable builds.