F OpenNebula/one#7632: DS migration docs (#638)

This PR introduces a new section to Product > Workload Operation >
Virtual Machines > Instances for Virtual Machine Datastore Migration, with links in whats_new.md and the Storage System Overview.

Co-authored-by: Guillermo Ramos <gramos@opennebula.io>
(cherry picked from commit cc876c9)

Author: 2 people

content/product/cloud_system_administration/_index.md

@@ -1,7 +1,7 @@
 ---
 title: "Cloud System Administration"
 date: "2025-02-17"
-description: "Cloud System Administration involves management to achieve and maintain an effective control of your cloud infrastructure according to your specific needs. The guides in this section cover security, administration of resources, and leveraging usage forecasts for performance optimization and costs savings."
+description: "Cloud System Administration involves the management and control of your cloud infrastructure according to your specific needs. The guides in this section cover security, administration of resources, and leveraging usage forecasts for performance optimization and costs savings."
 categories:
 pageintoc: "111"
 tags:

content/product/cluster_configuration/storage_system/overview.md

@@ -30,13 +30,9 @@ Storage in OpenNebula is designed around the concept of datastores. A datastore
 
 {{< image path="/images/datastoreoverview.svg" alt="Overview of Storage Design based on Datastores" align="center" width="60%" mb="20px" border="false" >}}
 
-## Driver Types
-
-
-
 ## Storage portfolio
 
-| Use case                                                      | Description                                                                                            | Shared | Disk Format                    | Disk snapshots | VM snapshots | Storage migration | Fault tolerance | HV      | Availability |
+| Use case                                                      | Description                                                                                            | Shared | Disk Format                    | Disk snapshots | VM snapshots | [Storage migration]({{% relref "/product/virtual_machines_operation/virtual_machines/vm_instances/#virtual-machine-datastore-migration" %}}) | Fault tolerance | HV      | Availability |
 | --                                                            | --                                                                                                     | --     | --                             | --             | --           | --                | --              | --      | --           |
 | [Local storage]({{% relref "local_ds" %}})                    | Images stored in Front-end* and transferred to hosts via<br/>SSH on instantiation.                      | no     | raw/qcow2                      | yes            | yes          | poweroff/live     | no              | KVM/LXC | EE/CE        |
 | [NFS/NAS]({{% relref "nas_ds" %}})                            | Images stored in a NFS share, activated directly.                                                      | yes    | raw/qcow2                      | yes            | yes          | poweroff/live     | yes             | KVM/LXC | EE/CE        |
@@ -53,6 +49,8 @@ Storage in OpenNebula is designed around the concept of datastores. A datastore
 
 <sup>\*\*\*</sup> Images stored on the frontend just contain metadata. The filesystems to mount should be present and available on the hosts.
 
+For details on performing **datastore migrations**, refer to the [datastore migration section of the Virtual Machines Operation Documentation]({{% relref "product/virtual_machines_operation/virtual_machines/vm_instances/#virtual-machine-datastore-migration" %}}).
+
 ### Other storage options
 
 As an admin, restrict the usage of some storage options because these give low-level access to hosts and could become a serious security risk. Please read carefully the corresponding documentation before using them: