HashiCorp Terraform Certified Associate Preparation Guide/

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Use of Input Variables

Use of Input Variables

Learn how to define and use input variables.

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How to define input variables

Variables are defined in a Terraform configuration. We can supply values for those variables at runtime or set a default value for the variable to use. Terraform requires that we supply a default value for a variable at runtime if we haven’t already done so… Failing to supply a value will cause the relevant command to error out.

At its most basic, a variable can be defined with a name label and without any arguments:

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variable "aws_region" {}

Let’s define some more information about our aws_region:

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variable "aws_region" {
    type        = string
    default     = "us-east-1"
    description = "The AWS region to use for this configuration"
}

We defined what data type to expect (string) and what value to default to, and we gave a ...