The container(s) that control the auto exposure of ports to the ELB when services are created … is that something that is available in a repo or a “Granny’s secret sauce” type thing?
No, I’m afraid it’s not currently public. I don’t think we’ve made final plans, but it may show up as we make progress on Infrakit: https://blog.docker.com/2016/10/introducing-infrakit-an-open-source-toolkit-for-declarative-infrastructure/
Please let us know if you have questions about how the loadbalancer management works or if you have ideas for improving it.