Multi-layer routing

Co-authored-by: Romain <rtribotte@users.noreply.github.com>

pkg/provider/kubernetes/crd/traefikio/v1alpha1/ingressroute.go

@@ -19,6 +19,10 @@ type IngressRouteSpec struct {
 	// TLS defines the TLS configuration.
 	// More info: https://doc.traefik.io/traefik/v3.5/reference/routing-configuration/http/routing/router/#tls
 	TLS *TLS `json:"tls,omitempty"`
+	// ParentRefs defines references to parent IngressRoute resources for multi-layer routing.
+	// When set, this IngressRoute's routers will be children of the referenced parent IngressRoute's routers.
+	// More info: https://doc.traefik.io/traefik/v3.5/routing/routers/#parentrefs
+	ParentRefs []IngressRouteRef `json:"parentRefs,omitempty"`
 }
 
 // Route holds the HTTP route configuration.
@@ -211,6 +215,14 @@ type MiddlewareRef struct {
 	Namespace string `json:"namespace,omitempty"`
 }
 
+// IngressRouteRef is a reference to an IngressRoute resource.
+type IngressRouteRef struct {
+	// Name defines the name of the referenced IngressRoute resource.
+	Name string `json:"name"`
+	// Namespace defines the namespace of the referenced IngressRoute resource.
+	Namespace string `json:"namespace,omitempty"`
+}
+
 // +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 // +kubebuilder:storageversion

pkg/provider/kubernetes/crd/traefikio/v1alpha1/zz_generated.deepcopy.go

@@ -432,6 +432,22 @@ func (in *IngressRouteList) DeepCopyObject() runtime.Object {
 	return nil
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *IngressRouteRef) DeepCopyInto(out *IngressRouteRef) {
+	*out = *in
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new IngressRouteRef.
+func (in *IngressRouteRef) DeepCopy() *IngressRouteRef {
+	if in == nil {
+		return nil
+	}
+	out := new(IngressRouteRef)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *IngressRouteSpec) DeepCopyInto(out *IngressRouteSpec) {
 	*out = *in
@@ -452,6 +468,11 @@ func (in *IngressRouteSpec) DeepCopyInto(out *IngressRouteSpec) {
 		*out = new(TLS)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.ParentRefs != nil {
+		in, out := &in.ParentRefs, &out.ParentRefs
+		*out = make([]IngressRouteRef, len(*in))
+		copy(*out, *in)
+	}
 	return
 }