OpenStack Kolla project is an interesting project, however, it can be difficult to setup.  In the docs page of Kolla, there is no description of how to successfully deploy OpenStack using only 1 public interface and 1 private facing interface as shown in the Figure 1.  This type of setup is fairly standard as production clouds typically prefer all internal traffic between VM's/servers to be internal and not reach out to the world.  The internal switch could be multiple switches, perhaps a PXE switch, data at a 10G connection, management switch at 1G, etc. 
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Inside of their docs, there is an advanced configuration page, which does describe how the interfaces should be separated but assumes you'll be able to figure out the networking.  At first, I assumed that we could just assign an internal IP address for the internal network and external for the external and it would "just work."  This unfortunately does not work.  

The first attempt I did to fix this was to create aliases and in our /etc/network/interfaces file as show below while keeping our eno2 in tact as a static IP.  Unfortunately, Ansible interpretes virtual interfaces (shown in the image below) as eno1_1 and eno1_2 and for the next precheck looks to see if they are active, which only our eno1 and eno2 are, not the eno1_1 or eno1_2.  So this attempt failed as well.