[ovirt-users] configuring gluster volumes/bricks from ovirt ??

hi, i'm trying to get into this gluster thing with oVirt and added a 2 node gluster cluster to my oVirt 4.1 data center (just for testing, i know it can't have HA with 2 nodes). provisioning of the storage hosts did apparently work and my storage cluster seems to be operational. i have very little understanding of glusterfs right know, but what i think i am missing in the interface is a way to configure volumes/bricks on my gluster cluster/hosts so i can use them for storage domains (i want to use a "managed gluster volume"), the drop down "Gluster" in "New domain" is empty. all i could find for storage specific UI was the "Services" tab for the storage cluster which is empty. i'm not using a hyperconverged/self-hosted setup, my engine is located on a dedicated server and i used iSCSI storage for data master domain. my hosts (for hypervisors and gluster storage) where installed on top of centos7, not using oVirt Node. does my setup make sense (it's only for testing)? do i have to configure gluster hosts manually? do i need more than 2 storage hosts when i want to configure gluster with ovirt (in hyperconverged setup 3 hosts are mandatory)? do i need oVirt Node/cockpit on the storage hosts to do further configuration? thanks a lot for reading matthias