Any network engineers willing to help work through an issue for dinner or drinks?

I'm way out of my element.I'm the technical co-founder of a cloud data analytics vendor. We host in our own cloud. We need access to our clients' cloud hosted or data center database servers. Most of these database servers are network private (rightfully so).Here's a roundup of what I see as requirements:1. The desire is to provide a binary or Docker image to install on an OS instance somewhere with line of sight to the database servers and have it "just work" with virtually no client intervention.2. The binary or Docker image needs to be accessible from select IP addresses from our cloud and ONLY those IP addresses.3. The binary or Docker image needs to proxy by some name to the database servers.4. Ideally, the entire configuration - our own IP addresses, the service names in use, and the database server IP addresses to resolve to - are all configurable from our cloud.I looked at nginx but configuration modification requires SIGHUP, which is obviously not in our cloud. Apache mod_proxy looks the same.Traefik may be promising but it looks like Marathon is the best fit for configuration and then we have to figure out Mesos.I know this is a lot to ask, but any reading materials to follow up on? Or even open source packages that do this? Or even better, is anyone willing to work this out in real-time? If in the San Francisco area, I'll buy dinner and drinks!