Boundary can kinda do it. AppDynamics can but doesn't work well with over a couple of thousand nodes. Companies internally have built things to do this at the m

Boundary can kinda do it. AppDynamics can but doesn't work well with over a couple of thousand nodes. Companies internally have built things to do this at the method-depends-on-remote-service level to visualize/analyze up and down-stream dependencies but I haven't seen anything open source. I was thinking of doing the same at the Rack level for ruby apps.