??? example "Extended Support Feature"
As of v1.0.0, the Request Mirroring feature is an Extended feature, and
requires implementations to support the `HTTPRouteRequestMirror` feature.
The HTTPRoute resource allows you to mirror HTTP requests to another backend using filters. This guide shows how to use this feature.
Mirrored requests will must only be sent to one single destination endpoint within this backendRef, and responses from this backend MUST be ignored by the Gateway.
Request mirroring is particularly useful in blue-green deployment. It can be used to assess the impact on application performance without impacting responses to clients in any way.
{% include 'standard/http-request-mirroring/httproute-mirroring.yaml' %}In this example, all requests are forwarded to service foo-v1 on port 8080,
and they are also forwarded to service foo-v2 on port 8080, but responses
are only generated from service foo-v1.