Merge pull request #59293 from roycaihw/openapi_endpoint

Automatic merge from submit-queue (batch tested with PRs 60011, 59256, 59293, 60328, 60367). 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>.

Serve OpenAPI spec with single /openapi/v2 endpoint

**What this PR does / why we need it**:
We are deprecating format-separated endpoints (`/swagger.json`, `/swagger-2.0.0.json`, `/swagger-2.0.0.pb-v1`, `/swagger-2.0.0.pb-v1.gz`) for OpenAPI spec, and switching to a single `/openapi/v2` endpoint in Kubernetes 1.10. The design doc and deprecation process are tracked at: https://docs.google.com/document/d/19lEqE9lc4yHJ3WJAJxS_G7TcORIJXGHyq3wpwcH28nU

Requested format is specified by setting HTTP headers

header | possible values
-- | --
Accept | `application/json`, `application/com.github.proto-openapi.spec.v2@v1.0+protobuf`
Accept-Encoding | `gzip`

This PR changes dynamic_client (and kubectl as a result) to use the new endpoint. The old endpoints will remain in 1.10 and 1.11, and get removed in 1.12.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
action required: Deprecate format-separated endpoints for OpenAPI spec. Please use single `/openapi/v2` endpoint instead.
```

/sig api-machinery

Kubernetes-commit: d6153194d929ad6c036d5bbbf67a6f892e75feb5

vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured/zz_generated.deepcopy.go

@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package unstructured
 
@@ -35,9 +35,8 @@ func (in *Unstructured) DeepCopyInto(out *Unstructured) {
 func (in *Unstructured) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -51,7 +50,6 @@ func (in *UnstructuredList) DeepCopyInto(out *UnstructuredList) {
 func (in *UnstructuredList) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }

vendor/k8s.io/apimachinery/pkg/apis/meta/v1/zz_generated.deepcopy.go

@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by deepcopy-gen. Do not edit it manually!
+// Code generated by deepcopy-gen. DO NOT EDIT.
 
 package v1
 
@@ -57,9 +57,8 @@ func (in *APIGroup) DeepCopy() *APIGroup {
 func (in *APIGroup) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -90,9 +89,8 @@ func (in *APIGroupList) DeepCopy() *APIGroupList {
 func (in *APIGroupList) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -154,9 +152,8 @@ func (in *APIResourceList) DeepCopy() *APIResourceList {
 func (in *APIResourceList) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -190,9 +187,8 @@ func (in *APIVersions) DeepCopy() *APIVersions {
 func (in *APIVersions) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -252,9 +248,8 @@ func (in *DeleteOptions) DeepCopy() *DeleteOptions {
 func (in *DeleteOptions) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -294,9 +289,8 @@ func (in *ExportOptions) DeepCopy() *ExportOptions {
 func (in *ExportOptions) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -320,9 +314,8 @@ func (in *GetOptions) DeepCopy() *GetOptions {
 func (in *GetOptions) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -568,9 +561,8 @@ func (in *List) DeepCopy() *List {
 func (in *List) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -619,9 +611,8 @@ func (in *ListOptions) DeepCopy() *ListOptions {
 func (in *ListOptions) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new MicroTime.
@@ -643,8 +634,7 @@ func (in *ObjectMeta) DeepCopyInto(out *ObjectMeta) {
 		if *in == nil {
 			*out = nil
 		} else {
-			*out = new(Time)
-			(*in).DeepCopyInto(*out)
+			*out = (*in).DeepCopy()
 		}
 	}
 	if in.DeletionGracePeriodSeconds != nil {
@@ -847,9 +837,8 @@ func (in *Status) DeepCopy() *Status {
 func (in *Status) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }
 
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
@@ -915,6 +904,26 @@ func (in *Timestamp) DeepCopy() *Timestamp {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in Verbs) DeepCopyInto(out *Verbs) {
+	{
+		in := &in
+		*out = make(Verbs, len(*in))
+		copy(*out, *in)
+		return
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Verbs.
+func (in Verbs) DeepCopy() Verbs {
+	if in == nil {
+		return nil
+	}
+	out := new(Verbs)
+	in.DeepCopyInto(out)
+	return *out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *WatchEvent) DeepCopyInto(out *WatchEvent) {
 	*out = *in
@@ -936,7 +945,6 @@ func (in *WatchEvent) DeepCopy() *WatchEvent {
 func (in *WatchEvent) DeepCopyObject() runtime.Object {
 	if c := in.DeepCopy(); c != nil {
 		return c
-	} else {
-		return nil
 	}
+	return nil
 }

vendor/k8s.io/apimachinery/pkg/apis/meta/v1/zz_generated.defaults.go

@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// This file was autogenerated by defaulter-gen. Do not edit it manually!
+// Code generated by defaulter-gen. DO NOT EDIT.
 
 package v1