A resource pool is a set of virtual machines, containers, and storage devices. It is useful for permission
handling in cases where certain users should have controlled access to a specific set of resources, as it
allows for a single permission to be applied to a set of elements, rather than having to manage this on a
per-resource basis. Resource pools are often used in tandem with groups, so that the members of a group
have permissions on a set of machines and storage.