For storage, current the Rancher Longhorn is integrated into Harvester. Due to the complexity of storage, Harvester does not support others at the moment.
For multi distinc datacenters, could you describe more details.
At the view of Harvester, if the infrustructure (e.g. network connectivity and latency) meets requirements, Harvester will cover different areas.
When multi datacenters have related requiments to Harvester, we may check and discuss them one by one.