Terragrunt is a popular open-source command line tool written in Go that provides additional features and simplifies the usage of Terraform, an infrastructure-as-code tool. It acts as a thin wrapper for Terraform, offering a higher-level abstraction and adding useful functionalities.
It helps in organizing and managing multiple Terraform configurations, modules, and remote state files, making it easier to work with large-scale projects. Terragrunt automates repetitive tasks and enforces best practices, enhancing the maintainability and reusability of Terraform codebases.
One significant feature is the ability to create reusable infrastructure templates, or "stacks." Stacks allow you to define common infrastructure components and configurations that can be applied across multiple projects. This promotes standardization and consistency across environments.
Terragrunt also offers state locking to prevent potential concurrent access issues when multiple users are working on the same infrastructure. This helps avoid conflicts and ensures the integrity of the Terraform state files.
It supports dependency management between Terraform modules, allowing you to define dependencies explicitly. This ensures proper execution order and reduces the possibility of resource creation errors.
Terragrunt integrates seamlessly with popular version control systems like Git, enabling collaboration and version tracking for infrastructure changes. It promotes the usage of Infrastructure as Code (IaC) principles and improves collaboration between development and operations teams.
It supports an extensive set of configuration options, including remote state configuration, input variables, and output capturing from Terraform runs. These options offer flexibility and customization for various deployment scenarios.
Terragrunt also simplifies the process of running multiple Terraform commands across different directories and environments. Complex operations such as destroy, apply, and plan can be executed with ease and consistency.
The tool includes rigorous error handling and logging capabilities, making it easier to diagnose and troubleshoot issues during infrastructure provisioning.
Terragrunt has an active community and regular updates, ensuring ongoing improvements, bug fixes, and new feature additions. It is widely adopted by organizations to streamline their Terraform workflows and enhance infrastructure management.
List of commands for terragrunt:
terragrunt:tldr:0c810 terragrunt: Generate and show an execution plan.$ terragrunt plantry on your machineexplain this command
terragrunt:tldr:0fc09 terragrunt: Show module output values.$ terragrunt outputtry on your machineexplain this command
terragrunt:tldr:681e1 terragrunt: Show current deployment (from state).$ terragrunt showtry on your machineexplain this command
terragrunt:tldr:731e6 terragrunt: Build or change infrastructure.$ terragrunt applytry on your machineexplain this command
terragrunt:tldr:b82c1 terragrunt: Build or change infrastructure from a tree of Terragrunt modules (stack).$ terragrunt run-all applytry on your machineexplain this command
terragrunt:tldr:e4e6f terragrunt: Destroy Terraform-managed infrastructure.$ terragrunt destroytry on your machineexplain this command