2) Exactly. I have pointed out this ticket. When do you think it will be available and in which version?
3) Unfortunately, I have not found any document where setting authentication other than IP based is described. I would like to set it through openstack and by hand. Is it possible?
5) Of course it is great that most features do not require any specific OpenStack integration. I just wanted to describe those that need it. It mostly shows what needs to be done in Openstack.