Sticky sessions?

[ezbaze]

I think this might be what you’re after:

Dynamic Request Routing

This should be helpfull as well:

How to set up session affinity with nginx for socket.io

TL;DR: you might not even need nginx, fly-replay will likely do what you want. This may turn out to be way simpler than you think. I have an application where requests have affinity - the details are quite different, but the result is the same. But first, let me back up. Request come into the fly network and are handled by one of our edge servers. We have no control over where the come in. We route those requests to the nearest server that you have deployed your application. The result is…