It still under development, unless you know how to work with source (LBAAS Driver Compile) then you maybe need to let it refine a bit. It was just released in liberty.....:
Major milestone: Octavia Version 0.5
Description: First generally usable release of Octavia. Delivers load balancing services on multiple Nova VMs or containers. Single, centralized command and control (not scalable).
OpenStack release target: Liberty
Neutron-LBaaS progress:
Flavor support
TLS support
Updated horizon UI
Octavia driver for Neutron LBaaS