Hashicorp Configuration Language
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External
Internal
Overview
Block
Interpolation Expression
Input Variable
variable "region" {
default = "us-east-1"
}
To use the variable:
region= var.region
This is also an interpolation expression, 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).