Hashicorp Configuration Language

External

• https://www.terraform.io/docs/configuration/index.html

Internal

• Terraform Concepts

Input Variable

variable "region" {
  default = "us-east-1"
}

To use the variable:

region= var.region

This is also an expression interpolation, prefixed with “var.”

Variables can be assigned in multiples way, and this is the descending order of precedence: • command-line flags (-var = ‘region=something’) • from a file (.tfvars, -var-file=…) terraform.tfvars or *.auto.tfvars in the current directory are automatically loaded. Multiple -var-file can be used. • From environment variables: TF_VAR_name. This can only be used for string variables. • UI Input • Variable defaults (“default” keyword).

Lists

https://learn.hashicorp.com/terraform/getting-started/variables#lists

Maps

https://learn.hashicorp.com/terraform/getting-started/variables#maps