Graduate BlockVolume feature to beta (#10100)

Author: Matthew Wong

content/en/docs/concepts/storage/persistent-volumes.md

@@ -310,11 +310,12 @@ Currently, storage size is the only resource that can be set or requested.  Futu
 ### Volume Mode
 
 {{< feature-state for_k8s_version="v1.9" state="alpha" >}}
+{{< feature-state for_k8s_version="v1.13" state="beta" >}}
 
-To enable this feature, enable the `BlockVolume` feature gate on the apiserver, controller-manager and the kubelet.
+The `BlockVolume` feature gate is enabled by default as of v1.13 on the apiserver, controller-manager and kubelet.
 
 Prior to Kubernetes 1.9, all volume plugins created a filesystem on the persistent volume.
-Now, you can set the value of `volumeMode` to `raw` to use a raw block device, or `filesystem`
+Now, you can set the value of `volumeMode` to `block` to use a raw block device, or `filesystem`
 to use a filesystem. `filesystem` is the default if the value is omitted. This is an optional API
 parameter.
 
@@ -541,9 +542,9 @@ spec:
 ## Raw Block Volume Support
 
 {{< feature-state for_k8s_version="v1.9" state="alpha" >}}
+{{< feature-state for_k8s_version="v1.13" state="beta" >}}
 
-To enable support for raw block volumes, enable the `BlockVolume` feature gate on the
-apiserver, controller-manager and the kubelet.
+The `BlockVolume` feature gate is enabled by default as of v1.13 on the apiserver, controller-manager and kubelet.
 
 The following volume plugins support raw block volumes, including dynamic provisioning where
 applicable.
@@ -562,6 +563,8 @@ applicable.
 Support for the additional plugins was added in 1.10.
 {{< /note >}}
 
+`PersistentVolumeClaims` can only be bound to `PersistentVolumes` with the same `volumeMode.`
+
 ### Persistent Volumes using a Raw Block Volume
 ```yaml
 apiVersion: v1
@@ -619,28 +622,6 @@ spec:
 **Note:** When adding a raw block device for a Pod, we specify the device path in the container instead of a mount path.
 {{< /note >}}
 
-### Binding Block Volumes
-
-If a user requests a raw block volume by indicating this using the `volumeMode` field in the `PersistentVolumeClaim` spec, the binding rules differ slightly from previous releases that didn't consider this mode as part of the spec.
-Listed is a table of possible combinations the user and admin might specify for requesting a raw block device. The table indicates if the volume will be bound or not given the combinations:
-Volume binding matrix for statically provisioned volumes:
-
-| PV volumeMode | PVC volumeMode  | Result           |
-| --------------|:---------------:| ----------------:|
-|   unspecified | unspecified     | BIND             |
-|   unspecified | Block           | NO BIND          |
-|   unspecified | Filesystem      | BIND             |
-|   Block       | unspecified     | NO BIND          |
-|   Block       | Block           | BIND             |
-|   Block       | Filesystem      | NO BIND          |
-|   Filesystem  | Filesystem      | BIND             |
-|   Filesystem  | Block           | NO BIND          |
-|   Filesystem  | unspecified     | BIND             |
-
-{{< note >}}
-**Note:** Only statically provisioned volumes are supported for alpha release. Administrators should take care to consider these values when working with raw block devices.
-{{< /note >}}
-
 ## Volume Snapshot and Restore Volume from Snapshot Support
 
 {{< feature-state for_k8s_version="v1.12" state="alpha" >}}

content/en/docs/concepts/storage/volumes.md

@@ -571,7 +571,6 @@ metadata:
 spec:
   capacity:
     storage: 100Gi
-  # volumeMode field requires BlockVolume Alpha feature gate to be enabled.
   volumeMode: Filesystem
   accessModes:
   - ReadWriteOnce
@@ -594,8 +593,7 @@ the Kubernetes scheduler to correctly schedule Pods using local volumes to the
 correct node.
 
 PersistentVolume `volumeMode` can now be set to "Block" (instead of the default
-value "Filesystem") to expose the local volume as a raw block device. The
-`volumeMode` field requires `BlockVolume` Alpha feature gate to be enabled.
+value "Filesystem") to expose the local volume as a raw block device.
 
 When using local volumes, it is recommended to create a StorageClass with
 `volumeBindingMode` set to `WaitForFirstConsumer`. See the