I am having the same issue from CLI and trying to use existing gluster storage (server1:/gluster_bricks/engine). Error: [ INFO ] TASK [Add glusterfs storage domain] [ ERROR ] Error: Fault reason is "Operation Failed". Fault detail is "[Failed to fetch Gluster Volume List]". HTTP response code is 400. [ ERROR ] fatal: [localhost]: FAILED! => {"changed": false, "deprecations": [{"msg": "The 'ovirt_storage_domains' module is being renamed 'ovirt_storage_domain'", "version": 2.8}], "msg": "Fault reason is \"Operation Failed\". Fault detail is \"[Failed to fetch Gluster Volume List]\". HTTP response code is 400."} Please specify the storage you would like to use (glusterfs, iscsi, fc, nfs)[nfs]: If you found a solution can you please share. thanks,