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Getting Started with Terraform - Second Edition by Kirill Shirinkin

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Using root module outputs

We already know that even our template.tf file is a module, named root module. And as with any module, it also has outputs. There is a terraform output command that retrieves outputs from your configuration. You can use it with modules, as well as with the main template. Let's first create our MightyTrousers module with terraform apply (you can remove the CrazyFoods module from template.tf for now, just to avoid extra AWS costs).

After the application is complete, run the terraform output command with the module name specified:

$> terraform output -module=mighty_trousers hostname 
ip-10-0-1-181.eu-central-1.compute.internal 

As an exercise, add the output to template.tf, it will get its value from the module output, ...

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