Terraform

Terraform is a free and open-source infrastructure as code automation tool, to provision, change, and version resources on any environment.

Project Homepage: Terraform by HashiCorp Documentation: Documentation | Terraform by HashiCorp TF Registry: Terraform Registry

Format and Validate

COMMAND	DESCRIPTION
terraform fmt	Reformat your configuration in the standard style
terraform validate	Check whether the configuration is valid
## Initialize Working Directory
COMMAND	DESCRIPTION
---	---
terraform init	Prepare your working directory for other commands
## Plan, Deploy and Cleanup
COMMAND	DESCRIPTION
---	---
terraform apply --auto-approve	Create or update infrastructure without confirmation prompt
terraform destroy --auto-approve	Destroy previously-created infrastructure without confirmation prompt
terraform plan -out plan.out	Output the deployment plan to plan.out
terraform apply plan.out	Use the plan.out to deploy infrastructure
terraform plan -destroy	Outputs a destroy plan
terraform apply -target=aws_instance.myinstance	Only apply/deploy changes to targeted resource
terraform apply -var myregion=us-east-1	Pass a variable via CLI while applying a configuration
terraform apply -lock=true	Lock the state file so it can't be modified
terraform apply refresh=false	Do not reconcile state file with real-world resources
terraform apply --parallelism=5	Number of simultaneous resource operations
terraform refresh	Reconcile the state in Terraform state file with real-world resources
terraform providers	Get informatino about providers used in the current configuration
## Workspaces
COMMAND	DESCRIPTION
---	---
terraform workspace new myworkspace	Create a new workspace
terraform workspace select default	Change to a workspace
terraform workspace list	List all workspaces
## State Manipulation
COMMAND	DESCRIPTION
---	---
terraform state show aws_instance.myinstance	Show details stored in the Terraform state file
terraform state pull > terraform.tfstate	Output Terraform state to a file
terraform state mv aws_iam_role.my_ssm_role module.mymodule	Move a resource tracked via state to different module
terraform state replace-provider hashicorp/aws registry.custom.com/aws	Replace an existing provider with another
terraform state list	List all resources tracked in the Terraform state file
terraform state rm aws_instance.myinstance	Unmanage a resource, delete it from the Terraform state file
## Import and Outputs
COMMAND	DESCRIPTION
---	---
terraform import resourcetype.myresource <id>	Import a Resource
terraform output	List all outputs
terraform output <output>	List a specific output
terraform output -json	List all outputs in JSON format
## Terraform Cloud
COMMAND	DESCRIPTION
---	---
terraform login	Login to Terraform Cloud with an API token
terraform logou	Logout from Terraform Cloud

Import existing resources