OpenTofu & Terragrunt: From zero to migration from Terraform

Explore OpenTofu, an open source infrastructure as code tool forked from Terraform under free license, backed by Linux Foundation projects, offering provider support, secure API-driven provisioning, and state tracking.

Install OpenTofu on macOS via Homebrew or GitHub releases, then extract binary, move to /usr/local/bin, chmod +x, and verify with tofu --version.

Install OpenTofu on linux arm64 by using snap or downloading a release from the official OpenTofu GitHub releases; extract, copy the binary to /usr/bin, chmod +x, and verify with -V.

Learn OpenTofu syntax (hcl) for infrastructure as code by building blocks, variables, and expressions that connect resources like AWS SSM parameters, with comment styles and template mixing.

Explore the OpenTofu workflow, including providers and core commands (init, plan, apply, destroy, fmt, console), and how OpenTofu interacts with vendor APIs to manage resources.

Explore OpenTofu data types and values, from strings and booleans to lists, maps, and objects, plus any and null, and learn how variables, data blocks, and resources connect with providers.

OpenTofu's null resource enables local or remote script execution when a shell isn't enough, with provisioners and depends_on to orchestrate actions and create a local file from an SSM parameter.

Leverage OpenTofu built-in functions and dynamic resource creation to conditionally deploy resources with count and dynamic blocks. Master inputs, depends_on, and outputs to build scalable, well-formatted infrastructure.

Use OpenTofu to create an AWS EC2 instance with a data source and aws_instance resource, configure security groups, bootstrap nginx, and store the public IP in SSM parameter for access.

Explore open tofu backend configuration to store the state file remotely, avoiding local state risks, with backends such as AWS S3, Azure Blob, GCP storage, and DynamoDB for concurrency control.

Create an S3 bucket and a DynamoDB table in AWS to store and lock the Terraform state for OpenTofu. Configure the backend and run init to migrate the state securely.

Explore OpenTofu's modular structure to organize infrastructure code into reusable models and provision security groups, EC2, parameter store, and RDS quickly.

Reuse modular OpenTofu models to quickly duplicate and customize infrastructure for a second application named live, updating security groups, the SSM parameter, and outputs.

Install terragrunt on macOS by downloading the Darwin Arm64 binary from the release page or via Homebrew. Copy the binary to /usr/local/bin, rename it terragrunt, and grant execute with chmod.

Install Terragrunt on Linux using Homebrew for a quick setup. Alternatively, download the Linux binary from the GitHub releases page, copy it to /usr/bin, chmod +x, and run Terragrunt.

Implement Terragrunt with OpenTofu across regions, configure the backend with S3 and DynamoDB, use environment and backend YAML files, and apply hooks for plan and apply during migration from Terraform.

See how Terragrunt reuses OpenTofu scripts to duplicate infrastructure across AWS regions, centralize state in S3, and control deployment order with dependencies and mock outputs.

Learn how to migrate Terraform configurations to OpenTofu, verify compatibility, back up state, and perform apply and destroy with tofu and Terragrunt, ensuring seamless AWS resource provisioning.