CSI inline volume support doc

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

@@ -1224,6 +1224,37 @@ Kubernetes component using the following feature gate flags:
 Learn how to
 [setup your PV/PVC with raw block volume support](/docs/concepts/storage/persistent-volumes/#raw-block-volume-support).
 
+#### CSI inline pod volume support
+
+{{< feature-state for_k8s_version="v1.13" state="alpha" >}}
+
+This feature is to enable CSI to be specified as an inline volume embedded
+within a pod similar to the following example:
+
+```yaml
+kind: Pod
+apiVersion: v1
+metadata:
+  name: my-csi-app
+spec:
+  containers:
+    - name: my-frontend
+      image: busybox
+      volumeMounts:
+      - mountPath: "/data"
+        name: my-csi-inline-vol
+      command: [ "sleep", "1000000" ]
+  volumes:
+    - name: my-csi-inline-vol
+      csi:
+        driver: csi-hostpath
+```
+
+```
+--feature-gates=CSIInlineVolume=true
+```
+
+
 ### Flexvolume
 
 Flexvolume is an out-of-tree plugin interface that has existed in Kubernetes