GRPCRoute: Not supported by HTTP Listener.

[parkjeongryul]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I want to use grpcroute with http listener, but It seems to be supported only by https listeners.
We need grpcroute with http listener, because our servers do not use TLS.

I think grpcroute of kong implementation is supported only with HTTPS protocol listener.

kubernetes-ingress-controller/internal/controllers/gateway/gateway_utils_test.go

Lines 33 to 42 in ee30642

	name: "only HTTPS protocol specified",
	listener: Listener{
	Protocol: HTTPSProtocolType,
	},
	expectedSupportedKinds: []gatewayv1beta1.RouteGroupKind{
	builder.NewRouteGroupKind().HTTPRoute().Build(),
	builder.NewRouteGroupKind().GRPCRoute().Build(),
	},
	resolvedRefsReason: gatewayv1beta1.ListenerReasonResolvedRefs,
	},

Kong implementation also needs to support grpcroute in http listener to pass conformance test.

https://github.com/kubernetes-sigs/gateway-api/pull/1884/files#diff-ebf60a20929a3769f60735ad57988fc4fafe3a7abd9aaa967ea8baf0a8408be3R1-R37

Expected Behavior

GRPCRoute should be supported by HTTP Listener.

Steps To Reproduce

1. Create gateway resource using http listener.
2. Create grpcroute resource referencing this gateway.

Ingress Controller logs

time="2023-05-03T11:18:25+09:00" level=info msg="processing grpcroute" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502
time="2023-05-03T11:18:25+09:00" level=info msg="checking deletion timestamp" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502
time="2023-05-03T11:18:25+09:00" level=info msg="retrieving GatewayClass and Gateway for route" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502
time="2023-05-03T11:18:25+09:00" level=info msg="checking if the grpcroute's gateways are ready" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502
time="2023-05-03T11:18:25+09:00" level=info msg="ensuring status contains Gateway associations" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502
time="2023-05-03T11:18:25+09:00" level=info msg="grpcroute not configured,requeueing" GatewayV1Alpha2GRPCRoute="{\"Namespace\":\"clous-jrpark-green-2304061502\",\"Name\":\"clous-search-grpc\"}" logger=controllers.GRPCRoute name=clous-search-grpc namespace=clous-jrpark-green-2304061502

Kong Ingress Controller version

v2.9.2

Kubernetes version

v1.23.15

Anything else?

No response

[parkjeongryul]

The kong grpcroute documentation says to use an http listener, but it doesn't seem to work in the code.

https://docs.konghq.com/kubernetes-ingress-controller/2.10.x/guides/using-ingress-with-grpc/

---

kubernetes-ingress-controller/internal/controllers/gateway/route_utils.go

Lines 390 to 393 in 8f031ed

	case *gatewayv1alpha2.GRPCRoute:
	if listener.Protocol != HTTPSProtocolType {
	return false
	}