How can a DevOps Engineer expose values from a child module that defines AWS VPC resources to the CLI?

To expose values from a child module so that they can be accessed from the command line interface (CLI), outputs must be defined in the child module. However, for these outputs to be accessible at the parent module level, the parent module also needs to define outputs that reference the specific outputs from the child module. This approach ensures that the values are propagated up and can be utilized or displayed when running Terraform commands from the CLI, such as terraform output.

By defining outputs in both the child module and the parent module, the values can be effectively extracted and presented to the user or utilized in further configurations. The outputs in the child module provide the necessary data, while the outputs in the parent module create an entry point for accessing that data from the CLI.

This structured approach promotes modularity in Terraform configurations, allowing child modules to encapsulate specific resource configurations while enabling the parent module to aggregate and expose these configurations as needed.