Multi-site/Multi-server

I currently have a single OpenHAB server that handles two remote locations connected by IPSec. Each location has it’s own z-wave gateway by means of a Raspberry Pi. The single OpenHAB server is using rfc2217 to connect to each Raspberry Pi. It works so long as the Internet at both locations is functioning.

I would like to have an OpenHAB server instance at each location, but still be able to manage my things as if it were one.

Is such a setup possible?

Look at Remote openHAB - Bindings | openHAB and MQTT Event Bus [4.0.0.0;4.9.9.9] for two options.