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DevOps Bootcamp · Lesson

Publishing Modules to a Registry

Share reusable Terraform modules across teams by versioning them in Git and publishing to the public or a private module registry.

Publishing Modules to a Registry is a free DevOps Bootcamp lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the DevOps Bootcamp learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Beyond Local Modules

Local modules live in a folder next to your config. To share modules across projects and teams you publish them to a module registry so consumers can pull them by name and version, just like a package manager.

Module Sources

The source argument decides where Terraform fetches a module from. Options include:

  • A local path
  • A Git repository
  • The Terraform public registry
  • A private registry in Terraform Cloud

Consuming a Registry Module

Registry modules use the format namespace/name/provider. Always pin a version for reproducible builds.

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "5.1.2"

  name = "my-vpc"
  cidr = "10.0.0.0/16"
}

Repository Naming Convention

The public registry requires a specific repo name: terraform-PROVIDER-NAME. For example a network module for AWS would live in a repo named terraform-aws-network.

Standard Module Structure

A publishable module follows a predictable layout so the registry can document it automatically.

terraform-aws-network/
  main.tf
  variables.tf
  outputs.tf
  README.md
  examples/
    basic/main.tf

Documenting Inputs

Each variable should have a description and ideally a type. The registry turns these into a documented inputs table automatically.

variable "cidr" {
  type        = string
  description = "The CIDR block for the VPC"
  default     = "10.0.0.0/16"
}

Versioning with Git Tags

The registry derives module versions from semantic version Git tags. Tagging a release is what makes a new version available to consumers.

git tag v1.0.0
git push origin v1.0.0

Pinning a Git Source Directly

You can skip the registry and reference a Git repo by URL, pinning to a tag with the ref query parameter.

module "network" {
  source = "git::https://github.com/acme/terraform-aws-network.git?ref=v1.0.0"
  cidr   = "10.0.0.0/16"
}

Private Registries

Terraform Cloud and Enterprise offer a private registry so internal modules stay confidential while still being discoverable by your organization with the same name/version workflow.

Semantic Versioning Constraints

Use version constraints to allow safe upgrades. The ~> operator allows patch and minor bumps but not breaking major changes.

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "~> 5.1"
}

Refreshing Module Versions

After changing a version constraint, run terraform init -upgrade to fetch the newest allowed version and update the lock file.

terraform init -upgrade

Quick Check

Check your grasp of module versioning.

Recap: Sharing Modules

You learned to publish and consume modules:

  • The terraform-PROVIDER-NAME repo naming rule.
  • Standard structure with documented inputs and outputs.
  • Git tags drive registry versions.
  • Version constraints like ~> keep upgrades safe.

Now your reusable modules can power every project in the org.

Frequently asked questions

Is the “Publishing Modules to a Registry” lesson free?

Yes — the full text of “Publishing Modules to a Registry” is free to read here on the web, and the DevOps Bootcamp course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the DevOps Bootcamp course, upgrade to CoddyKit PRO.

What will I learn in “Publishing Modules to a Registry”?

Share reusable Terraform modules across teams by versioning them in Git and publishing to the public or a private module registry. You practise DevOps Bootcamp with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start DevOps Bootcamp?

No prior experience is required. DevOps Bootcamp on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “Publishing Modules to a Registry” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this DevOps Bootcamp lesson?

Yes. Every DevOps Bootcamp lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Introduction to Terraform Modules
  2. Creating Reusable Modules
  3. Using Workspaces for Environments
  4. Publishing Modules to a Registry
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