DifferenceHostDevicesByAlias given two slices of host-devices, according to Alias.Name, it returns a slice with host-devices that exists on the first slice and not exists on the second.

NewAddressPool creates an address pool based on the provided list of resources and the environment variables that correspond to it.

NewBestEffortAddressPool creates a pool that wraps a provided pool and allows `Pop` calls to always succeed (even when a resource is missing).