Cheat Sheet: Essential Terraform Commands

Terraform is an open-source infrastructure as code (IaC) tool that allows you to define and manage cloud and on-premises infrastructure using human-readable configuration files.

Key Features:

1. Infrastructure as Code (IaC): Manage infrastructure using code, rather than manual processes or GUIs.
2. Declarative Configuration: Define desired state, and Terraform handles the creation and updates.
3. Multi-Cloud Support: Supports various cloud providers (AWS, Azure, Google Cloud, etc.) and on-premises infrastructure.
4. Modular and Reusable: Break down configurations into modules for reuse and easier management.
5. State Management: Tracks infrastructure state, enabling efficient updates and rollbacks.
6. Collaboration: Supports team collaboration through version control systems like Git.

Benefits:

1. Version Control: Track infrastructure changes and collaborate with teams.
2. Consistency: Ensure consistent infrastructure across environments and deployments.
3. Efficiency: Automate provisioning and updates, reducing manual errors.
4. Flexibility: Supports multiple cloud providers and infrastructure types.

Common Use Cases:

1. Cloud Infrastructure: Manage cloud resources (e.g., VMs, databases, networks).
2. DevOps: Automate infrastructure provisioning for CI/CD pipelines.
3. Disaster Recovery: Create and manage disaster recovery environments.

---

Essential Terraform Commands

Setup and Initialization

Initialize a Terraform working directory:

terraform init

Check Terraform version:

terraform version

Configuration and Planning

Check configuration files for syntax errors:

terraform validate

Generate and show an execution plan:

terraform plan

Generate and show a destruction plan:

terraform plan -destroy

Apply and Destroy

Execute the actions proposed in a Terraform plan:

terraform apply

Execute without prompting for approval:

terraform apply -auto-approve

Destroy Terraform-managed infrastructure:

terraform destroy