How can variables be set in a Terraform configuration?

In Terraform, variables can be set using a variety of methods to enhance flexibility and convenience in configurations. The first option highlights three primary ways to define these variables: through .tfvars files, command-line flags, or directly within the configuration files themselves.

Using .tfvars files is a standard practice for managing variable values separately from the main configuration, allowing for easy modification and organization, especially in larger projects. These files enable users to specify multiple values in a single place, maintaining cleaner and more manageable configurations.

Command-line flags provide an immediate method for overriding variable values at runtime. This allows users to pass in different values as needed without touching the existing configuration or .tfvars files, making it a rapidly adjustable option suitable for testing or one-time deployments.

Additionally, variables can be set directly in the Terraform configuration files, providing a straightforward approach for defining default values or initial configurations without the need for any external support files.

This combination of methods provides Terraform users with a robust framework for configuring their infrastructure in the way that best suits their workflow and requirements.