Sorry that I missed this earlier, but I think this should be rather:

```
service_host = <%= @keystone_host %>
service_port = <%= @keystone_service_port %>
auth_host = <%= @keystone_host %>
auth_port = <%= @keystone_admin_port %>
auth_uri = <%= @keystone_protocol %>://<%= @keystone_host %>:<%= @keystone_service_port %>/v2.0
```

But I'm actually unsure if we really need to provide all those options _and_ auth_uri or if the latter would be actually sufficient...