Cilium Feature Proposal

The first cut for Gateway API was done in #21749, however, we have a couple of follow-up tasks to support more features from Gateway API upstream.

This issue is to track the work of implementing different HTTP Filters such as RequestRedirect, URLRewrite, RequestMirror, etc.

Propose Solutions

Goals

Users can fully use all the HTTP filters in Gateway API spec with Cilium.

Tasks

• Filters (only RequestHeaderModifier is implemented currently)
  • RequestRedirect done in gateway-api: Bump version to v0.6.0 #22680
  • ResponseHeaderFilter done in gateway-api: Bump version to v0.6.0 #22680
  • URLRewrite
  • RequestMirror
  • ExtensionRef
• Make sure we have enough coverage for these filters. In addition to unit tests, we might need to add our own e2e tests as the current upstream Conformance test didn't have any. The best is to contribute back upstream.
• Update Getting Started Guide documentation