upgrade crd version from v1beta1 to v1 (#161)

Author: Shi Wang

pkg/controller/loadbalancer.go

@@ -31,7 +31,7 @@ import (
 	"github.com/caicloud/loadbalancer-controller/pkg/provider"
 	"github.com/caicloud/loadbalancer-controller/pkg/proxy"
 
-	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
+	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
@@ -130,14 +130,17 @@ func (lbc *LoadBalancerController) Run(workers int, stopCh <-chan struct{}) {
 
 // ensure loadbalancer tpr initialized
 func (lbc *LoadBalancerController) ensureResource() error {
+	// set x-kubernetes-preserve-unknown-fields to true, stops the API server
+	// decoding step from pruning fields which are not specified
+	// in the validation schema.
+	xPreserveUnknownFields := true
 	crd := &apiextensions.CustomResourceDefinition{
 		ObjectMeta: metav1.ObjectMeta{
 			Name: "loadbalancers." + lbapi.GroupName,
 		},
 		Spec: apiextensions.CustomResourceDefinitionSpec{
-			Group:   lbapi.GroupName,
-			Version: lbapi.SchemeGroupVersion.Version,
-			Scope:   apiextensions.NamespaceScoped,
+			Group: lbapi.GroupName,
+			Scope: apiextensions.NamespaceScoped,
 			Names: apiextensions.CustomResourceDefinitionNames{
 				Plural:   "loadbalancers",
 				Singular: "loadbalancer",
@@ -147,26 +150,40 @@ func (lbc *LoadBalancerController) ensureResource() error {
 					"lb",
 				},
 			},
-			AdditionalPrinterColumns: []apiextensions.CustomResourceColumnDefinition{
+			Versions: []apiextensions.CustomResourceDefinitionVersion{
 				{
-					Name:     "VIP",
-					Type:     "string",
-					JSONPath: ".spec.providers.*.vip",
-				},
-				{
-					Name:     "VIPS",
-					Type:     "string",
-					JSONPath: ".spec.providers.*.vips",
-				},
-				{
-					Name:     "NODES",
-					Type:     "string",
-					JSONPath: ".spec.nodes.names",
+					Name: lbapi.SchemeGroupVersion.Version,
+					AdditionalPrinterColumns: []apiextensions.CustomResourceColumnDefinition{
+						{
+							Name:     "VIP",
+							Type:     "string",
+							JSONPath: ".spec.providers.*.vip",
+						},
+						{
+							Name:     "VIPS",
+							Type:     "string",
+							JSONPath: ".spec.providers.*.vips",
+						},
+						{
+							Name:     "NODES",
+							Type:     "string",
+							JSONPath: ".spec.nodes.names",
+						},
+					},
+					Schema: &apiextensions.CustomResourceValidation{
+						OpenAPIV3Schema: &apiextensions.JSONSchemaProps{
+							Type: "object",
+							// x-kubernetes-preserve-unknown-fields
+							XPreserveUnknownFields: &xPreserveUnknownFields,
+						},
+					},
+					Served:  true,
+					Storage: true,
 				},
 			},
 		},
 	}
-	_, err := lbc.client.Apiextensions().ApiextensionsV1beta1().CustomResourceDefinitions().Create(crd)
+	_, err := lbc.client.Apiextensions().ApiextensionsV1().CustomResourceDefinitions().Create(crd)
 
 	if errors.IsAlreadyExists(err) {
 		log.Info("Skip the creation for CustomResourceDefinition LoadBalancer because it has already been created")