feat(gateway-api): support GRPCRoute

[AlinsRan]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Documentation
• Refactor
• Chore
• CI/CD or Tests

What this PR does / why we need it:

The conformance-test of GRPCRoute has been integrated, which mainly covers basic functions.

apiVersion: gateway.networking.k8s.io/v1
date: "2025-09-22T06:40:34Z"
gatewayAPIChannel: experimental
gatewayAPIVersion: v1.3.0
implementation:
  contact: null
  organization: APISIX
  project: apisix-ingress-controller
  url: https://github.com/apache/apisix-ingress-controller.git
  version: v2.0.0
kind: ConformanceReport
mode: default
profiles:
- core:
    result: success
    statistics:
      Failed: 0
      Passed: 12
      Skipped: 0
  name: GATEWAY-GRPC
  summary: Core tests succeeded.
- core:
    failedTests:
    - HTTPRouteInvalidBackendRefUnknownKind
    result: failure
    skippedTests:
    - HTTPRouteHTTPSListener
    statistics:
      Failed: 1
      Passed: 31
      Skipped: 1
  extended:
    result: partial
    skippedTests:
    - HTTPRouteRedirectPortAndScheme
    statistics:
      Failed: 0
      Passed: 7
      Skipped: 1
    supportedFeatures:
    - GatewayAddressEmpty
    - GatewayPort8080
    - HTTPRouteDestinationPortMatching
    - HTTPRouteMethodMatching
    - HTTPRoutePortRedirect
    - HTTPRouteRequestMirror
    - HTTPRouteResponseHeaderModification
    - HTTPRouteSchemeRedirect
    unsupportedFeatures:
    - GatewayHTTPListenerIsolation
    - GatewayInfrastructurePropagation
    - GatewayStaticAddresses
    - HTTPRouteBackendProtocolH2C
    - HTTPRouteBackendProtocolWebSocket
    - HTTPRouteBackendRequestHeaderModification
    - HTTPRouteBackendTimeout
    - HTTPRouteHostRewrite
    - HTTPRouteParentRefPort
    - HTTPRoutePathRedirect
    - HTTPRoutePathRewrite
    - HTTPRouteQueryParamMatching
    - HTTPRouteRequestMultipleMirrors
    - HTTPRouteRequestPercentageMirror
    - HTTPRouteRequestTimeout
  name: GATEWAY-HTTP
  summary: Core tests failed with 1 test failures. Extended tests partially succeeded
    with 1 test skips.

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[Copilot]

Pull Request Overview

This PR adds support for GRPCRoute in the APISIX Ingress Gateway API implementation, enabling gRPC routing capabilities alongside existing HTTP routing.

Key changes:

• Complete GRPCRoute controller and translator implementation
• RBAC permission updates for GRPCRoute resource access
• E2E testing framework and test cases for GRPC backend validation
• Documentation updates reflecting GRPCRoute support status

Reviewed Changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
internal/controller/grpcroute_controller.go	New controller implementation handling GRPCRoute resource lifecycle and reconciliation
internal/adc/translator/grpcroute.go	Translator logic converting GRPCRoute specs to APISIX configuration
internal/adc/translator/httproute.go	Refactored common header matching and request mirror filtering functions
test/e2e/scaffold/grpc.go	Testing utilities for GRPC backend communication and validation
test/e2e/gatewayapi/grpcroute.go	E2E test cases covering GRPCRoute filters and functionality
test/e2e/framework/grpc.go	GRPC backend deployment framework for testing
config/rbac/role.yaml	Updated RBAC permissions to include GRPCRoute resources

Comments suppressed due to low confidence (2)

internal/adc/translator/grpcroute.go:1

• When header.Type is nil, matchType remains an empty string, which will cause HeaderMatchToVars to return an error for 'unknown header match type'. The default should be set to string(gatewayv1.HeaderMatchExact) to match Gateway API specification.

// Licensed to the Apache Software Foundation (ASF) under one

test/e2e/scaffold/grpc.go:1

• Typo in log message: 'grocroutes' should be 'grpcroutes'.

// Licensed to the Apache Software Foundation (ASF) under one or more

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[Copilot]

Pull Request Overview

Copilot reviewed 21 out of 21 changed files in this pull request and generated 2 comments.

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[ronething]

lgtm