Description of problem: In case one wants to create a gluster based hyperconverged RHV setup but is limited to only 1 host, the installation will fail as there currently is a hard coded requirement of 3 replicas. This should be still the default but changeable by the user who explicitely wants to start with a 1 hypervisor setup but maybe later extend to a 2 or 3 node setup. Version-Release number of selected component (if applicable): How reproducible: Install RHV-H with underlying hyperconverged glusterfs. Actual results: Installation will not continue without specifying at least 3 hosts for gluster. Expected results: A warning like "this is not recommended and not supported" if only one host is specified for glusterfs, but still continues with setting up glusterfs. Additional info:
If you want to test, using ovirt-system-test (http://ovirt-system-tests.readthedocs.io/en/latest/index.html) . It provides a great-all-in-one, while using replica 3 as needed. I can run it on a 12GB RAM host.