Support mirroring request body

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>
Co-authored-by: Julien Salleyron <julien.salleyron@gmail.com>

pkg/provider/kubernetes/crd/kubernetes_http.go

@@ -240,8 +240,9 @@ func (c configBuilder) buildMirroring(ctx context.Context, tService *v1alpha1.Tr
 
 	conf[id] = &dynamic.Service{
 		Mirroring: &dynamic.Mirroring{
-			Service: fullNameMain,
-			Mirrors: mirrorServices,
+			Service:     fullNameMain,
+			Mirrors:     mirrorServices,
+			MaxBodySize: tService.Spec.Mirroring.MaxBodySize,
 		},
 	}
 

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

@@ -44,7 +44,8 @@ type ServiceSpec struct {
 // load-balancer, and a list of mirrors.
 type Mirroring struct {
 	LoadBalancerSpec
-	Mirrors []MirrorService `json:"mirrors,omitempty"`
+	MaxBodySize *int64
+	Mirrors     []MirrorService `json:"mirrors,omitempty"`
 }
 
 // +k8s:deepcopy-gen=true

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

@@ -749,6 +749,11 @@ func (in *MirrorService) DeepCopy() *MirrorService {
 func (in *Mirroring) DeepCopyInto(out *Mirroring) {
 	*out = *in
 	in.LoadBalancerSpec.DeepCopyInto(&out.LoadBalancerSpec)
+	if in.MaxBodySize != nil {
+		in, out := &in.MaxBodySize, &out.MaxBodySize
+		*out = new(int64)
+		**out = **in
+	}
 	if in.Mirrors != nil {
 		in, out := &in.Mirrors, &out.Mirrors
 		*out = make([]MirrorService, len(*in))

pkg/provider/kv/kv_test.go

@@ -56,6 +56,7 @@ func Test_buildConfiguration(t *testing.T) {
 		"traefik/http/services/Service01/loadBalancer/servers/0/url":                                 "foobar",
 		"traefik/http/services/Service01/loadBalancer/servers/1/url":                                 "foobar",
 		"traefik/http/services/Service02/mirroring/service":                                          "foobar",
+		"traefik/http/services/Service02/mirroring/maxBodySize":                                      "42",
 		"traefik/http/services/Service02/mirroring/mirrors/0/name":                                   "foobar",
 		"traefik/http/services/Service02/mirroring/mirrors/0/percent":                                "42",
 		"traefik/http/services/Service02/mirroring/mirrors/1/name":                                   "foobar",
@@ -635,7 +636,8 @@ func Test_buildConfiguration(t *testing.T) {
 				},
 				"Service02": {
 					Mirroring: &dynamic.Mirroring{
-						Service: "foobar",
+						Service:     "foobar",
+						MaxBodySize: func(v int64) *int64 { return &v }(42),
 						Mirrors: []dynamic.MirrorService{
 							{
 								Name:    "foobar",