What will occur if you run terraform plan without any configuration changes?

When you run terraform plan without any configuration changes, the command will analyze the current state of the infrastructure against the last applied configuration. Since no changes have been made to the configuration files, Terraform performs a comparison and finds that the existing configuration matches the current state in the state file.

As a result, it concludes that there are no updates or modifications needed. Therefore, it will report that no changes are necessary, confirming that the infrastructure is in the desired state according to the existing configuration. This outcome allows the user to validate that everything is in sync without making any alterations.

It's important to note that while this command does refresh the current state by reevaluating the existing infrastructure and its attributes, the significant outcome in this context is the lack of any resulting changes, which is why it is reported that no changes will be reported.