Add support for TCP (in kubernetes CRD)

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

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

@@ -0,0 +1,58 @@
+package v1alpha1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// IngressRouteTCPSpec is a specification for a IngressRouteTCPSpec resource.
+type IngressRouteTCPSpec struct {
+	Routes      []RouteTCP `json:"routes"`
+	EntryPoints []string   `json:"entryPoints"`
+	TLS         *TLSTCP    `json:"tls,omitempty"`
+}
+
+// RouteTCP contains the set of routes.
+type RouteTCP struct {
+	Match    string       `json:"match"`
+	Services []ServiceTCP `json:"services,omitempty"`
+}
+
+// TLSTCP contains the TLS certificates configuration of the routes. To enable
+// Let's Encrypt, use an empty TLS struct, e.g. in YAML:
+//
+// tls: {} # inline format
+//
+// tls:
+//   secretName: # block format
+type TLSTCP struct {
+	// SecretName is the name of the referenced Kubernetes Secret to specify the
+	// certificate details.
+	SecretName  string `json:"secretName"`
+	Passthrough bool   `json:"passthrough"`
+}
+
+// ServiceTCP defines an upstream to proxy traffic.
+type ServiceTCP struct {
+	Name string `json:"name"`
+	Port int32  `json:"port"`
+}
+
+// +genclient
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// IngressRouteTCP is an Ingress CRD specification.
+type IngressRouteTCP struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata"`
+
+	Spec IngressRouteTCPSpec `json:"spec"`
+}
+
+// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
+
+// IngressRouteTCPList is a list of IngressRoutes.
+type IngressRouteTCPList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata"`
+	Items           []IngressRouteTCP `json:"items"`
+}