When using Infrastructure as Code tools such as Terraform, it is often necessary to retrieve output values from the provisioned resources after code execution.
One of the uses of these output values is that they can be used after execution by other programs. This is often the case when the execution of the Terraform configuration is integrated into a CI/CD pipeline.
For example, we can use these output values in a CI/CD pipeline that creates an Azure App Service with Terraform and also deploys the application to this Azure App Service. In this example, we can have the name of the App Service (web app type) as the output of the Terraform configuration. These output values are also very useful for transmitting information through modules, which we will see in detail in Chapter 5, Sharing Terraform Configuration with Modules.
In this recipe, we will learn how to implement output values in Terraform's configuration.
