Infer type of transport from service port name

[bobbytables]

The Istio project does this and I think it's a nice feature. Basically if you define a port with a prefix of http, it sets the codec to http1.1 for the envoy cluster / endpoints.

If you specify grpc for the port name, it infers http2 and sets it accordingly. I think this is much nice than the annotation that you must add to the services as you may have ports that are http and grpc accordingly.

Basically:

apiVersion: v1
kind: Service
metadata:
  name: sessions-grpc-gateway
  namespace: applications
spec:
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    load-balancer-sessions: 'true'
  sessionAffinity: None
  type: ClusterIP

The port http would automatically be assigned http1.1, whereas if it were set to grpc or http2 then we could automatically set that codec to http2 too.

[davecheney]

Thank you for this suggestion. I can't promise I can get too it soon, but I think this is possible to add in a backward compatible way with the current annotation.