I found a reference patch but it's not merged yet. - https://review.opendev.org/c/openstack/kolla-ansible/+/863321  

On Sat, Jan 6, 2024 at 9:55 AM Satish Patel <satish.txt@gmail.com> wrote:
Folks,

I am trying to find a kolla-ansible doc related to how to implement trove in production with best practices. Especially when a guest-agent (running inside VM) talks to RPC service. 

How are other folks doing in their environments? In most cases RPC is an internal service and not visible to any guest VMs. Looking for some guidance.