GRPCRoute

[brianehlert]

As a user of NGF who uses the gRPC protocol for their applications
I want NGF to support routing gRPC traffic to my applications
So that I can use NGF for my gRPC traffic.

Background

As part of our expanding our Gateway API surface, we should support GRPC traffic. Feedback received from:
https://nginxcommunity.slack.com/archives/C03SXACMUBE/p1697132687059629

Acceptance Criteria

• The GRPCRoute specification is implemented in NGF according to core features listed here: https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.GRPCRoute
• Users can define a GRPCRoute that configures NGF to route gRPC traffic to upstreams.

Tasks

Beta Give feedback

1. GRPCRoute Hostnames and BackendRef #1765
   area/grpcroute/core enhancement refined size/extra-large +4
   
2. GRPCRoute Method Matching #1783
   area/grpcroute/core enhancement refined size/medium +4
   
3. GRPCRoute Header Matching #1790
   area/grpcroute/core enhancement refined size/medium +4
   
4. GRPCRouteFilter Request HTTPHeaderFilter for GRPCRouteRule #1766
   area/grpcroute/core enhancement refined size/small +4
   
5. GRPCRouteRule BackendRef Weight Traffic Splitting #1768
   area/grpcroute/core enhancement refined +3
   
6. Convert HTTP Responses to GRPC for GRPCRoute #1837
   enhancement refined +2
   
7. BackendTLSPolicy support for GRPCRoute #1838
   enhancement refined +2
   
8. Report the Number of GRPCRoutes in Product Telemetry #1839
   area/telemetry enhancement refined size/medium +4
   
9. Add mechanism for user to disable HTTP/2 if required #1858
   enhancement refined size/medium +3
   
10. Support ResponseHeaderModifier filter for GRPC Route #1935
    area/grpcroute enhancement refined size/extra-small +4
    

For Discussion

• What work can we split up?
• Intern?
• How much implementation can be reused from http route?

This is a test

[devcwm]

@mpstefan any update on this request? Can this be prioritized since many of the NGF real world implementation requires GRPCRoutes. This is a major blocker for us.

[mpstefan]

Hey @devcwm!

We will likely be refining this work next week Monday, so you'll see some real stories in this epic soon. It is one of our top priorities for 1.3. When the implementation is complete, you should be able to pull from edge to start using it, as we make sure that edge is stable as well (we just don't run our long running non-functional tests on it).

Keep an eye on this issue for updates!