Support proxying HTTP/2 to backend applications

[codyaray]

We're looking for a PaaS which supports proxying HTTP/2 to the backend app to enable mobile support for gRPC. Deis supports terminating HTTP/2 at the router and opening an HTTP/1.1 connection to the app (#216) currently. The only L7 router that I know of which supports HTTP/2 to the backend is nghttpx (with --http2-bridge in v1.8 or backend=<ADDR>,<PORT>;;proto=h2;tls later). The other option is using a L4 load balancer to opaquely proxy the TCP stream. Felix says that the only tool he knows of to route to multiple TCP backends based on the SNI header is HAProxy.

[krancour]

For now, you can always skip the router for select applications by making your service "non-routable" and then also manually editing it to be of Type: LoadBalancer. Such an app will have it's own external load balancer (e.g. ELB or similar) and raw TCP will flow straight from there to your pods.

[codyaray]

Wait, so how does this work exactly? https://deis.com/blog/2016/grpc-on-workflow/

Is it because there's no external LB / routing is disabled? (We're looking for gRPC between mobile device and backend server.)

[bacongobbler]

The communication between the two apps is internal to the cluster. It doesn't go through the router.

[Cryptophobia]

This issue was moved to teamhephy/router#16