RFS-1, a provider for ZFS-HA (good known and experienced with HA-Cluster nexentastor), supports OmniOS and other ZFS derivatives.

HA-Napp-IT

HA-Napp-IT

Now napp-it can manage the RFS-1 High Availability-Cluster Plugin.

Offical announcement @napp-it website:

napp-it 16.08 pro edition
 Appliance security supports RSF-1 ports 1195 and 8020
 Comstar: create and delete raw LU
 new main menu HA Cluster with RSF-1 cluster settrings
  napp-it Pro: Support for RSF-1 Cluster

Link to napp-it changelog