Merge pull request #56004 from caesarxuchao/admission-v1beta1

Automatic merge from submit-queue (batch tested with PRs 56128, 56004, 56083, 55833, 56042). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Graduate the admission and admissionregistration (webhook part) API to v1beta1

ref: kubernetes/features#492

Most changes are mechanical. Please take a look at the commit message to see if the commit is worth reviewing.

```release-note
Action required:
The `admission/v1alpha1` API has graduated to `v1beta1`. Please delete your existing webhooks before upgrading the cluster, and update your admission webhooks to use the latest API, because the API has backwards incompatible changes.
The webhook registration related part of the `admissionregistration` API has graduated to `v1beta1`. Please delete your existing configurations before upgrading the cluster, and update your configuration file to use the latest API.
```

Kubernetes-commit: 4cafc5459bf987d2476efd0a4c17158a158887a3

vendor/k8s.io/apimachinery/pkg/api/meta/BUILD

@@ -34,6 +34,7 @@ go_library(
         "firsthit_restmapper.go",
         "help.go",
         "interfaces.go",
+        "lazy.go",
         "meta.go",
         "multirestmapper.go",
         "priority.go",

vendor/k8s.io/apimachinery/pkg/api/meta/lazy.go

@@ -0,0 +1,121 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package meta
+
+import (
+	"sync"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// lazyObject defers loading the mapper and typer until necessary.
+type lazyObject struct {
+	loader func() (RESTMapper, runtime.ObjectTyper, error)
+
+	lock   sync.Mutex
+	loaded bool
+	err    error
+	mapper RESTMapper
+	typer  runtime.ObjectTyper
+}
+
+// NewLazyObjectLoader handles unrecoverable errors when creating a RESTMapper / ObjectTyper by
+// returning those initialization errors when the interface methods are invoked. This defers the
+// initialization and any server calls until a client actually needs to perform the action.
+func NewLazyObjectLoader(fn func() (RESTMapper, runtime.ObjectTyper, error)) (RESTMapper, runtime.ObjectTyper) {
+	obj := &lazyObject{loader: fn}
+	return obj, obj
+}
+
+// init lazily loads the mapper and typer, returning an error if initialization has failed.
+func (o *lazyObject) init() error {
+	o.lock.Lock()
+	defer o.lock.Unlock()
+	if o.loaded {
+		return o.err
+	}
+	o.mapper, o.typer, o.err = o.loader()
+	o.loaded = true
+	return o.err
+}
+
+var _ RESTMapper = &lazyObject{}
+var _ runtime.ObjectTyper = &lazyObject{}
+
+func (o *lazyObject) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	if err := o.init(); err != nil {
+		return schema.GroupVersionKind{}, err
+	}
+	return o.mapper.KindFor(resource)
+}
+
+func (o *lazyObject) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {
+	if err := o.init(); err != nil {
+		return []schema.GroupVersionKind{}, err
+	}
+	return o.mapper.KindsFor(resource)
+}
+
+func (o *lazyObject) ResourceFor(input schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	if err := o.init(); err != nil {
+		return schema.GroupVersionResource{}, err
+	}
+	return o.mapper.ResourceFor(input)
+}
+
+func (o *lazyObject) ResourcesFor(input schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
+	if err := o.init(); err != nil {
+		return []schema.GroupVersionResource{}, err
+	}
+	return o.mapper.ResourcesFor(input)
+}
+
+func (o *lazyObject) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
+	if err := o.init(); err != nil {
+		return nil, err
+	}
+	return o.mapper.RESTMapping(gk, versions...)
+}
+
+func (o *lazyObject) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
+	if err := o.init(); err != nil {
+		return nil, err
+	}
+	return o.mapper.RESTMappings(gk, versions...)
+}
+
+func (o *lazyObject) ResourceSingularizer(resource string) (singular string, err error) {
+	if err := o.init(); err != nil {
+		return "", err
+	}
+	return o.mapper.ResourceSingularizer(resource)
+}
+
+func (o *lazyObject) ObjectKinds(obj runtime.Object) ([]schema.GroupVersionKind, bool, error) {
+	if err := o.init(); err != nil {
+		return nil, false, err
+	}
+	return o.typer.ObjectKinds(obj)
+}
+
+func (o *lazyObject) Recognizes(gvk schema.GroupVersionKind) bool {
+	if err := o.init(); err != nil {
+		return false
+	}
+	return o.typer.Recognizes(gvk)
+}

vendor/k8s.io/apimachinery/pkg/api/meta/meta.go

@@ -89,7 +89,7 @@ func ListAccessor(obj interface{}) (List, error) {
 		}
 		return nil, errNotList
 	default:
-		panic(fmt.Errorf("%T does not implement the List interface", obj))
+		return nil, errNotList
 	}
 }
 

vendor/k8s.io/apimachinery/pkg/api/meta/unstructured.go

@@ -21,8 +21,24 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 )
 
+// InterfacesForUnstructuredConversion returns VersionInterfaces suitable for
+// dealing with unstructured.Unstructured objects and supports conversion
+// from typed objects (provided by parent) to untyped objects.
+func InterfacesForUnstructuredConversion(parent VersionInterfacesFunc) VersionInterfacesFunc {
+	return func(version schema.GroupVersion) (*VersionInterfaces, error) {
+		if i, err := parent(version); err == nil {
+			return &VersionInterfaces{
+				ObjectConvertor:  i.ObjectConvertor,
+				MetadataAccessor: NewAccessor(),
+			}, nil
+		}
+		return InterfacesForUnstructured(version)
+	}
+}
+
 // InterfacesForUnstructured returns VersionInterfaces suitable for
-// dealing with unstructured.Unstructured objects.
+// dealing with unstructured.Unstructured objects. It will return errors for
+// other conversions.
 func InterfacesForUnstructured(schema.GroupVersion) (*VersionInterfaces, error) {
 	return &VersionInterfaces{
 		ObjectConvertor:  &unstructured.UnstructuredObjectConverter{},