Persistent Storage: Note about disks on AWS (hitachienergy#2998)

docs/home/howto/kubernetes/PERSISTENT_STORAGE.md

@@ -68,9 +68,9 @@ Sample configuration files that can be used in Epiphany `configuration/rook`:
 
 More informations about Rook with Ceph storage may be found in the official Rook [documentation](https://rook.io/docs/rook/v1.8/).
 
-### Create disks for Rook/Ceph Cluster Storage - Azure
+#### Create disks for Rook/Ceph Cluster Storage - Azure
 
-To create Rook/Ceph Cluster Storage on Azure first you need to add empty disk resource to Kubernetes cluster in key `specification.additional_disks`.
+To create Rook/Ceph Cluster Storage on Azure first you need to add empty disk resource to Kubernetes cluster in key `specification.additional_disks`, under `kind: infrastructure/virtual-machine` for configuration of kubernetes node machine:
 
 ```yaml
 ---
@@ -90,6 +90,32 @@ specification:
 
 #### Create disks for Rook/Ceph Cluster Storage - AWS
 
+To define additional empty disk resources for Rook/Ceph Cluster Storage on AWS, use `specification.disks.additional_disks` under `kind: infrastructure/virtual-machine` for configuration of kubernetes node machine:
+```yaml
+---
+kind: infrastructure/virtual-machine
+title: Virtual Machine Infra
+provider: aws
+name: kubernetes-node-machine
+specification:
+  disks:
+    additional_disks:
+      - volume_type: gp2
+        volume_size: 64
+        delete_on_termination: false
+        encrypted: true
+```
+Currently Epiphany support the following parameters for `additional_disks` specification: 
+- device_name
+- volume_type
+- volume_size
+- encrypted
+- delete_on_termination
+- tags
+
+More information about AWS block devices and its parameters: [ebs_block_device](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance#ebs_block_device)
+
+
 #### Create disks for Rook/Ceph Cluster Storage - On Prem
 
 ### Azure