allowedLocations property

A list of allowed location names represented by internal URLs.

Each location can be a region or a zone. Only one region or multiple zones in one region is supported now. For example, ["regions/us-central1"] allow VMs in any zones in region us-central1. ["zones/us-central1-a", "zones/us-central1-c"] only allow VMs in zones us-central1-a and us-central1-c. All locations end up in different regions would cause errors. For example, ["regions/us-central1", "zones/us-central1-a", "zones/us-central1-b", "zones/us-west1-a"] contains 2 regions "us-central1" and "us-west1". An error is expected in this case.