FYI..
This mockups are the enhancements to Gluster Management. We can enhance gluster by three ways from cockpit (Expand Cluster, Expand Volume and Create Volume)
1- Expand Cluster:
We can do this by configuring additional Hosts,Volumes,Bricks into cluster. (Packages is optional)
2- Create Volume:
This can be done by choosing Hosts and then configure Volume,Bricks.
Note: The validation is, the number of brick rows should be equivalent to number of volumes selected in Volumes screen, applicable for above two.
3- Expand Volume:
We can do this with existing volume.So User will choose already added Hosts,Volume and then configure brick.(here we don't have option for "Add Bricks")