Support for all services kinds (and sticky) in CRD

Co-authored-by: Jean-Baptiste Doumenjou <jb.doumenjou@gmail.com>
Co-authored-by: Julien Salleyron <julien.salleyron@gmail.com>

pkg/provider/kubernetes/crd/traefik/v1alpha1/service.go

@@ -0,0 +1,64 @@
+package v1alpha1
+
+import (
+	"github.com/containous/traefik/v2/pkg/config/dynamic"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// +genclient
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// TraefikService is the specification for a service (that an IngressRoute refers
+// to) that is usually not a terminal service (i.e. not a pod of servers), as
+// opposed to a Kubernetes Service. That is to say, it usually refers to other
+// (children) services, which themselves can be TraefikServices or Services.
+type TraefikService struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata"`
+
+	Spec ServiceSpec `json:"spec"`
+}
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// TraefikServiceList is a list of TraefikService resources.
+type TraefikServiceList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata"`
+
+	Items []TraefikService `json:"items"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// ServiceSpec defines whether a TraefikService is a load-balancer of services or a
+// mirroring service.
+type ServiceSpec struct {
+	Weighted  *WeightedRoundRobin `json:"weighted,omitempty"`
+	Mirroring *Mirroring          `json:"mirroring,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// Mirroring defines a mirroring service, which is composed of a main
+// load-balancer, and a list of mirrors.
+type Mirroring struct {
+	LoadBalancerSpec
+	Mirrors []MirrorService `json:"mirrors,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// MirrorService defines one of the mirrors of a Mirroring service.
+type MirrorService struct {
+	LoadBalancerSpec
+	Percent int `json:"percent,omitempty"`
+}
+
+// +k8s:deepcopy-gen=true
+
+// WeightedRoundRobin defines a load-balancer of services.
+type WeightedRoundRobin struct {
+	Services []Service       `json:"services,omitempty"`
+	Sticky   *dynamic.Sticky `json:"sticky,omitempty"`
+}