[apisix] Implement router interface and observer interface

Signed-off-by: Gallardot <tttick@163.com>

pkg/apis/flagger/v1beta1/canary.go

@@ -80,6 +80,10 @@ type CanarySpec struct {
 	// +optional
 	IngressRef *LocalObjectReference `json:"ingressRef,omitempty"`
 
+	// Reference to APISIX route resource
+	// +optional
+	RouteRef *LocalObjectReference `json:"routeRef,omitempty"`
+
 	// Reference to Gloo Upstream resource. Upstream config is copied from
 	// the referenced upstream to the upstreams generated by flagger.
 	// +optional

pkg/apis/flagger/v1beta1/provider.go

@@ -1,6 +1,7 @@
 package v1beta1
 
 const (
+	ApisixProvider     string = "apisix"
 	AppMeshProvider    string = "appmesh"
 	LinkerdProvider    string = "linkerd"
 	IstioProvider      string = "istio"

pkg/apis/flagger/v1beta1/zz_generated.deepcopy.go

@@ -458,6 +458,11 @@ func (in *CanarySpec) DeepCopyInto(out *CanarySpec) {
 		*out = new(LocalObjectReference)
 		**out = **in
 	}
+	if in.RouteRef != nil {
+		in, out := &in.RouteRef, &out.RouteRef
+		*out = new(LocalObjectReference)
+		**out = **in
+	}
 	if in.UpstreamRef != nil {
 		in, out := &in.UpstreamRef, &out.UpstreamRef
 		*out = new(CrossNamespaceObjectReference)