Open-Source DevOps · gruntwork-io

terragrunt

Terragrunt is an orchestration tool that sits on top of Terraform/OpenTofu, helping teams manage large-scale Infrastructure as Code deployments. It reduces boilerplate, manages state, and automates common IaC workflows across multiple environments and projects.

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Source: GitHub — github.com/gruntwork-io/terragrunt

9.7k

GitHub stars

1.2k

Forks

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	gruntwork-io/terragrunt
Owner	gruntwork-io
Primary language	Go
License	MIT — OSI-approved
Stars	9.7k
Forks	1.2k
Open issues	222
Latest release	v1.1.0 (2026-07-01)
Last updated	2026-07-08
Source	https://github.com/gruntwork-io/terragrunt

What terragrunt is

A Go-based CLI wrapper for Terraform/OpenTofu that provides DRY (Don't Repeat Yourself) configuration management, remote state handling, dependency orchestration, and multi-environment/multi-region deployment patterns. It executes Terraform under the hood while adding layers of orchestration and configuration inheritance.

Quickstart

Get the terragrunt source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/gruntwork-io/terragrunt.git2cd terragrunt3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Multi-Environment Infrastructure Scaling

Manage Terraform configurations across dev, staging, and production environments with minimal duplication. Terragrunt's configuration inheritance and remote state management reduce copy-paste and enforce consistency at scale.

Monorepo Infrastructure Organization

Structure large codebases with hundreds of Terraform modules across teams and services. Terragrunt handles dependency graphs, applies ordering, and enables granular permission boundaries without rewriting Terraform code.

Multi-Account Cloud Deployments

Orchestrate deployments across multiple AWS, GCP, or Azure accounts with centralized configuration. Terragrunt's remote backend management and environment variables simplify cross-account state and credential handling.

Implementation considerations

Terraform/OpenTofu must be installed and functioning; Terragrunt is not a replacement but a wrapper that requires the underlying tool to be operational.
State management strategy (S3, Azure Storage, Terraform Cloud) must be planned upfront; Terragrunt simplifies multi-backend configurations but migration from existing setups can be disruptive.
Team training required: developers need to understand Terragrunt's config inheritance model, `terragrunt.hcl` structure, and dependency graphs to avoid configuration errors.
CI/CD integration is critical; Terragrunt's apply/plan operations need to be wired into pipelines, requiring careful secrets/credentials handling and approval workflows.
Version pinning of Terraform/OpenTofu is enforced via Terragrunt config; ensure compatibility matrix is tested before upgrades across teams.

When to avoid it — and what to weigh

Terraform Not Already Adopted — Terragrunt adds orchestration on top of Terraform. If your team is still learning Terraform basics or evaluating IaC approaches, Terragrunt introduces additional abstraction that may delay adoption.
Small, Single-Environment Deployments — For simple, single-region or single-account infrastructure, Terragrunt's configuration layering and dependency management are overhead. Plain Terraform is simpler and sufficient.
Strict Vendor Lock-In Prevention — Terragrunt is tightly coupled to Terraform/OpenTofu workflows. If portability to other IaC tools (Pulumi, CloudFormation, Ansible) is a requirement, this introduces vendor lock.
Team Without Terraform Expertise — Terragrunt requires solid understanding of Terraform semantics, state management, and module design. Adding Terragrunt's configuration DSL (HCL) on top raises the skill floor.

License & commercial use

MIT License. Permissive, OSI-approved license allowing commercial use, modification, and distribution with no restrictions beyond attribution.

MIT license explicitly permits commercial use without restrictions. No license-based obstacles to using Terragrunt in proprietary or revenue-generating products. Review internal compliance policies for attribution requirements.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

Terragrunt does not handle secrets storage; it passes environment variables and credentials to Terraform. Ensure backend state (S3, etc.) is encrypted and access-controlled. Credentials must be sourced externally (CI/CD secrets, IAM roles, Vault). No built-in audit logging; rely on CloudTrail, backend-specific logging, and CI/CD audit trails. Code review of terragrunt.hcl files is critical as configuration errors can lead to unintended resource exposure or deletion.

Alternatives to consider

Plain Terraform with custom scripts

Lower abstraction layer; teams with simple multi-environment needs can achieve similar orchestration using shell scripts and Terraform workspaces without Terragrunt's overhead.

Pulumi (IaC in Python/Go/TS)

If organization prefers imperative IaC in general-purpose languages rather than HCL, Pulumi offers orchestration and modularity natively without wrapping another tool.

Terraform Cloud/Enterprise

HashiCorp's managed offering provides state management, runs, policy enforcement, and team collaboration without requiring Terragrunt; trade-off is SaaS dependency and cost.

Software development agency

Build on terragrunt with DEV.co software developers

Terragrunt simplifies multi-environment Terraform deployments. Our team can guide your implementation strategy, state migration, and CI/CD integration for enterprise infrastructure.

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terragrunt FAQ

Does Terragrunt replace Terraform?

No. Terragrunt is an orchestration wrapper that requires Terraform or OpenTofu to be installed. It simplifies configuration management and multi-environment deployments but executes Terraform under the hood.

Can we migrate from existing Terraform to Terragrunt gradually?

Yes. Terragrunt can wrap existing Terraform modules incrementally. You can start with a few modules and migrate others over time, though state backend changes should be carefully planned and tested.

What is the learning curve?

Requires solid Terraform knowledge (modules, providers, state). Terragrunt adds HCL configuration, dependency graphs, and inheritance patterns. Expect 1-2 weeks for a team new to both Terraform and Terragrunt.

Is Terragrunt suitable for small teams?

For simple, single-environment deployments, it adds overhead. Better suited for teams with multiple environments, projects, or regions where DRY configuration and orchestration provide clear value.

Software development & web development with DEV.co

Adopting terragrunt is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate open-source devops software in production.

Ready to scale your Infrastructure as Code?

Terragrunt simplifies multi-environment Terraform deployments. Our team can guide your implementation strategy, state migration, and CI/CD integration for enterprise infrastructure.

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