Revert v1.17 release changes on v1.16 branch (#18123)

This reverts commits:
  1131f8603e.
  cf5b8b200c.
  75de70a431.
  dff2f7b960.
  cf925bb688.
  ffd1363c0e.
  87a2cafb20.
  ffe259d6f2.

content/en/docs/reference/access-authn-authz/admission-controllers.md

@@ -172,20 +172,7 @@ event requests. The cluster admin can specify event rate limits by:
  * Referencing an `EventRateLimit` configuration file from the file provided to the API
    server's command line flag `--admission-control-config-file`:
 
-{{< tabs name="eventratelimit_example" >}}
-{{% tab name="apiserver.config.k8s.io/v1" %}}
 ```yaml
-apiVersion: apiserver.config.k8s.io/v1
-kind: AdmissionConfiguration
-plugins:
-- name: EventRateLimit
-  path: eventconfig.yaml
-...
-```
-{{% /tab %}}
-{{% tab name="apiserver.k8s.io/v1alpha1" %}}
-```yaml
-# Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1
 apiVersion: apiserver.k8s.io/v1alpha1
 kind: AdmissionConfiguration
 plugins:
@@ -193,8 +180,6 @@ plugins:
   path: eventconfig.yaml
 ...
 ```
-{{% /tab %}}
-{{< /tabs >}}
 
 There are four types of limits that can be specified in the configuration:
 
@@ -255,20 +240,7 @@ imagePolicy:
 
 Reference the ImagePolicyWebhook configuration file from the file provided to the API server's command line flag `--admission-control-config-file`:
 
-{{< tabs name="imagepolicywebhook_example1" >}}
-{{% tab name="apiserver.config.k8s.io/v1" %}}
 ```yaml
-apiVersion: apiserver.config.k8s.io/v1
-kind: AdmissionConfiguration
-plugins:
-- name: ImagePolicyWebhook
-  path: imagepolicyconfig.yaml
-...
-```
-{{% /tab %}}
-{{% tab name="apiserver.k8s.io/v1alpha1" %}}
-```yaml
-# Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1
 apiVersion: apiserver.k8s.io/v1alpha1
 kind: AdmissionConfiguration
 plugins:
@@ -276,44 +248,22 @@ plugins:
   path: imagepolicyconfig.yaml
 ...
 ```
-{{% /tab %}}
-{{< /tabs >}}
 
 Alternatively, you can embed the configuration directly in the file:
 
-{{< tabs name="imagepolicywebhook_example2" >}}
-{{% tab name="apiserver.config.k8s.io/v1" %}}
 ```yaml
-apiVersion: apiserver.config.k8s.io/v1
-kind: AdmissionConfiguration
-plugins:
-- name: ImagePolicyWebhook
-  configuration:
-    imagePolicy:
-      kubeConfigFile: <path-to-kubeconfig-file>
-      allowTTL: 50
-      denyTTL: 50
-      retryBackoff: 500
-      defaultAllow: true
-```
-{{% /tab %}}
-{{% tab name="apiserver.k8s.io/v1alpha1" %}}
-```yaml
-# Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1
 apiVersion: apiserver.k8s.io/v1alpha1
 kind: AdmissionConfiguration
 plugins:
 - name: ImagePolicyWebhook
   configuration:
     imagePolicy:
-      kubeConfigFile: <path-to-kubeconfig-file>
+      kubeConfigFile: /path/to/file
       allowTTL: 50
       denyTTL: 50
       retryBackoff: 500
       defaultAllow: true
 ```
-{{% /tab %}}
-{{< /tabs >}}
 
 The ImagePolicyWebhook config file must reference a [kubeconfig](/docs/concepts/cluster-administration/authenticate-across-clusters-kubeconfig/) formatted file which sets up the connection to the backend. It is required that the backend communicate over TLS.
 
@@ -491,11 +441,8 @@ and kubelets will not be allowed to modify labels with that prefix.
   * `kubernetes.io/arch`
   * `kubernetes.io/os`
   * `beta.kubernetes.io/instance-type`
-  * `node.kubernetes.io/instance-type`
   * `failure-domain.beta.kubernetes.io/region`
   * `failure-domain.beta.kubernetes.io/zone`
-  * `topology.kubernetes.io/region`
-  * `topology.kubernetes.io/zone`
   * `kubelet.kubernetes.io/`-prefixed labels
   * `node.kubernetes.io/`-prefixed labels
 
@@ -542,20 +489,7 @@ podNodeSelectorPluginConfig:
 
 Reference the `PodNodeSelector` configuration file from the file provided to the API server's command line flag `--admission-control-config-file`:
 
-{{< tabs name="podnodeselector_example1" >}}
-{{% tab name="apiserver.config.k8s.io/v1" %}}
 ```yaml
-apiVersion: apiserver.config.k8s.io/v1
-kind: AdmissionConfiguration
-plugins:
-- name: PodNodeSelector
-  path: podnodeselector.yaml
-...
-```
-{{% /tab %}}
-{{% tab name="apiserver.k8s.io/v1alpha1" %}}
-```yaml
-# Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1
 apiVersion: apiserver.k8s.io/v1alpha1
 kind: AdmissionConfiguration
 plugins:
@@ -563,8 +497,6 @@ plugins:
   path: podnodeselector.yaml
 ...
 ```
-{{% /tab %}}
-{{< /tabs >}}
 
 #### Configuration Annotation Format
 `PodNodeSelector` uses the annotation key `scheduler.alpha.kubernetes.io/node-selector` to assign node selectors to namespaces.

content/en/docs/reference/access-authn-authz/extensible-admission-controllers.md

@@ -184,48 +184,24 @@ the webhooks. There are three steps to complete the configuration.
   (yes, the same schema that's used by kubectl), so the field name is
   `kubeConfigFile`. Here is an example admission control configuration file:
 
-{{< tabs name="admissionconfiguration_example1" >}}
-{{% tab name="apiserver.config.k8s.io/v1" %}}
-```yaml
-apiVersion: apiserver.config.k8s.io/v1
-kind: AdmissionConfiguration
-plugins:
-- name: ValidatingAdmissionWebhook
-  configuration:
-    apiVersion: apiserver.config.k8s.io/v1
-    kind: WebhookAdmissionConfiguration
-    kubeConfigFile: "<path-to-kubeconfig-file>"
-- name: MutatingAdmissionWebhook
-  configuration:
-    apiVersion: apiserver.config.k8s.io/v1
-    kind: WebhookAdmissionConfiguration
-    kubeConfigFile: "<path-to-kubeconfig-file>"
-```
-{{% /tab %}}
-{{% tab name="apiserver.k8s.io/v1alpha1" %}}
-```yaml
-# Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1
-apiVersion: apiserver.k8s.io/v1alpha1
-kind: AdmissionConfiguration
-plugins:
-- name: ValidatingAdmissionWebhook
-  configuration:
-    # Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1, kind=WebhookAdmissionConfiguration
-    apiVersion: apiserver.config.k8s.io/v1alpha1
-    kind: WebhookAdmission
-    kubeConfigFile: "<path-to-kubeconfig-file>"
-- name: MutatingAdmissionWebhook
-  configuration:
-    # Deprecated in v1.17 in favor of apiserver.config.k8s.io/v1, kind=WebhookAdmissionConfiguration
-    apiVersion: apiserver.config.k8s.io/v1alpha1
-    kind: WebhookAdmission
-    kubeConfigFile: "<path-to-kubeconfig-file>"
-```
-{{% /tab %}}
-{{< /tabs >}}
+    ```yaml
+    apiVersion: apiserver.k8s.io/v1alpha1
+    kind: AdmissionConfiguration
+    plugins:
+    - name: ValidatingAdmissionWebhook
+      configuration:
+        apiVersion: apiserver.config.k8s.io/v1alpha1
+        kind: WebhookAdmission
+        kubeConfigFile: "<path-to-kubeconfig-file>"
+    - name: MutatingAdmissionWebhook
+      configuration:
+        apiVersion: apiserver.config.k8s.io/v1alpha1
+        kind: WebhookAdmission
+        kubeConfigFile: "<path-to-kubeconfig-file>"
+    ```
 
-For more information about `AdmissionConfiguration`, see the
-[AdmissionConfiguration schema](https://github.com/kubernetes/kubernetes/blob/v1.17.0/staging/src/k8s.io/apiserver/pkg/apis/apiserver/v1/types.go#L27).
+The schema of `admissionConfiguration` is defined
+[here](https://github.com/kubernetes/kubernetes/blob/v1.13.0/staging/src/k8s.io/apiserver/pkg/apis/apiserver/v1alpha1/types.go#L27).
 See the [webhook configuration](#webhook-configuration) section for details about each config field.
 
 * In the kubeConfig file, provide the credentials: