Add header control (#254)

pkg/ingress/kube/annotations/canary.go

@@ -106,6 +106,8 @@ func ApplyByWeight(canary, route *networking.HTTPRoute, canaryIngress *Ingress)
 	// We will process total weight in the end.
 	route.Route = append(route.Route, canary.Route[0])
 
+	// canary route use the header control applied on itself.
+	headerControl{}.ApplyRoute(canary, canaryIngress)
 	// Move route level to destination level
 	canary.Route[0].Headers = canary.Headers
 
@@ -166,6 +168,10 @@ func ApplyByHeader(canary, route *networking.HTTPRoute, canaryIngress *Ingress)
 		}
 	}
 
+	canary.Headers = nil
+	// canary route use the header control applied on itself.
+	headerControl{}.ApplyRoute(canary, canaryIngress)
+
 	// First add normal route cluster
 	canary.Route[0].FallbackClusters = append(canary.Route[0].FallbackClusters,
 		route.Route[0].Destination.DeepCopy())