Is it possible to have a web dyno that runs simple web server listening on a chosen port, that's not accessible from the outside world, but is addressable from all other dyno's (web & worker) in the app?
Basically, I have a web app with several web and worker dynos, and they all need to perform certain lookups. I want to run a server with a simple API that performs lookups and returns the response. Ideally it want's to be running in the same environment as the other dynos because it's getting called very frequently (hundreds of times/sec at peak processing).
Is this something that could be supported in Heroku? If not, any idea how this type of thing could be achieved?