Learn TERRAGRUNT with Real Code Examples

Terragrunt is designed to reduce boilerplate Terraform code by enabling reusable modules and configurations.

Supports managing Terraform remote state backends automatically, including locking and versioning.

Facilitates multi-environment setups (dev, staging, production) with shared modules and variables.

Integrates seamlessly with Terraform CLI and modules.

Enables orchestration of Terraform commands across multiple modules in the correct dependency order.

Terragrunt.hcl - central configuration file for modules

Include blocks - reusing configurations across modules

Dependencies - define module execution order

Remote state configuration - automatic backend setup

Hooks - pre- and post-Terraform command scripts

Terragrunt.hcl - main configuration file

Include blocks - for shared settings and variables

Dependencies - declare inter-module relationships

Remote state - backend configuration for Terraform

Hooks - scripts executed pre- and post-Terraform commands

Live/ - environment-specific configurations (dev, staging, prod)

Modules/ - reusable Terraform modules

terragrunt.hcl - central configuration per module/environment

Hooks/ - optional pre/post scripts

README.md documenting setup and usage

Organize Terraform modules per service/component

Create terragrunt.hcl for each module/environment

Configure remote state and backend settings

Define dependencies between modules if needed

Run `terragrunt apply` to provision resources

Beginner: Single module deployment

Intermediate: Multi-module deployment with shared configs

Advanced: Multi-environment orchestration with dependencies

Expert: Complex infrastructure pipelines with hooks

Architect: Enterprise-grade, DRY, multi-cloud deployments

Terragrunt vs Terraform -> Terragrunt orchestrates & DRYs Terraform

Terragrunt vs Pulumi -> Declarative vs code-based infrastructure

Terragrunt vs Ansible -> Provisioning automation vs configuration management

Terragrunt vs CDK -> Infrastructure-as-code vs programmatic provisioning

Terragrunt vs Atlantis -> CI/CD automation vs GitOps integration

2016 - Terragrunt first released by Gruntwork

2017 - Introduced multi-environment inheritance

2018 - Added hooks and dependency blocks

2019 - Improved remote state automation and locking

2021 - Integration best practices with Terraform 0.14+

2023 - Latest Terragrunt enhancements for module orchestration and CI/CD

Terragrunt.hcl - configuration file

Include - reuse configs across modules

Dependency - order module execution

Hook - pre/post Terraform command script

Remote state - centralized Terraform state storage