Documenting FlexVolume Resize alpha feature.

kubernetes · Nov 27, 2018 · d97fdbe · d97fdbe
1 parent e24a059
commit d97fdbe
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/content/en/docs/concepts/storage/persistent-volumes.md b/content/en/docs/concepts/storage/persistent-volumes.md
@@ -192,6 +192,7 @@ the following types of volumes:
 * Azure File
 * Azure Disk
 * Portworx
+* FlexVolumes
 
 You can only expand a PVC if its storage class's `allowVolumeExpansion` field is set to true.
 
@@ -227,8 +228,17 @@ kubectl describe pvc <pvc_name>
 
 If the `PersistentVolumeClaim` has the status `FileSystemResizePending`, it is safe to recreate the pod using the PersistentVolumeClaim.
 
+FlexVolumes allow resize if the driver is set with the `RequiresFSResize` capability to true. 
+The FlexVolume can be resized on pod restart. 
+
 #### Resizing an in-use PersistentVolumeClaim
 
+Expanding in-use PVCs for FlexVolumes is added in release 1.13. To enable this feature use  `ExpandInUsePersistentVolumes` and `ExpandPersistentVolumes` feature gates. The `ExpandPersistentVolumes` feature gate is already enabled by default. If the `ExpandInUsePersistentVolumes` is set, FlexVolume can be resized online without pod restart. 
+
+{{< note >}}
+**Note:** FlexVolume resize is possible only when the underlying driver supports resize.
+{{< /note >}}
+
 {{< feature-state for_k8s_version="v1.11" state="alpha" >}}
 
 Expanding in-use PVCs is an alpha feature. To use it, enable the `ExpandInUsePersistentVolumes` feature gate.