I'm upgrading from 2 host w/ attached storage to 3-host HCI w/Gluster.  What is the procedure for this?  Is export domain depreciated?

1. Shut down and export all VMs - Do I use export domain?  Or is the "Backup Domain" the newer method?

2. Detach domains from cluster and wipe hosts

3. Build HCI cluster, setup gluster bricks/vols

4. Attach backup domain and import VMs

Thanks!

Vincent