Using VMware Hyperconvergence with vSAN

Use the power of Hyperconvergence with vSAN

Last updated 7th September 2022


Find out how to use the power of Hyperconvergence for your virtual machines with vSAN.

This guide explains how to set up VMware vSAN on OVHcloud Hosted Private Cloud.


The vSAN Data-At-Rest Encryption and vSAN Data-In-Transit Encryption encryption options are not supported by default on vSAN clusters. If you would like to implement these solutions, please contact your Technical Account Manager.

Encryption is still possible at the VM and its data level, as described in the guide Enabling VM Encryption with vSphere Native Key Provider.


What is vSAN?

vSAN is an object storage solution offered by VMware. It gathers a set of disks situated directly on your VMware hosts, and presents them as a single datastore. This is known as Software-Defined Storage or SDS. One of the advantages of vSAN is that it is fully integrated into vSphere, and can be managed directly from vCenter.

For full concept review and technical specifications, check out the Official VMware VSAN page

Setting up vSAN

Turn off vSphere HA

vSAN relies on the cluster’s high-availability features. Before you start any operation, you have to ensure that you have turned it off.

In the vSphere interface menu, go to the Hosts and Clusters dashboard.


On the left side, select your cluster, go in the Configure tab then vSphere Availability.
Click the Edit button.


Turn off vSphere HA and click OK.


Turn on vSAN Service

In the Cluster configuration menu, go down to vSAN / Services and click on Configure.


This guide is based on vSAN’s essential features so we will be using the default options.
All of our hosts are on the same site. We'll select Single site cluster and click Next.


We recommend using Deduplication and Compression to optimize storage.
Click Next.


The Claim disks window assigns avalaible disks to cache or capacity (see Official VMware VSAN page for explanation) depending on types and sizes. You can customize it to your need.
Click Next.


With three hosts, fault domain is set up automatically and a single failure will be tolerated.
Click Next.


Verify the settings in the summary window then click Finish.


Go back to the cluster configuration and turn vSphere HA back on.
Your datastore is visible in the storage section and available to use.


For performance and resilience reasons, VMware recommends not using more than 70% of the volume of a vSAN datastore.

Turn off vSAN

Before turning off vSAN, make sure to evacuate all of the virtual machines hosted on the datastore, or delete the machines you are no longer using. Click on the ‘Datastore’ tab, and check that there are no virtual machines set up on the vSAN datastore.


Delete disk groups.

To delete all of the vSAN configuration details for your disks, you need to delete the group of disks created by vSAN when you turned it on.
In the Cluster configuration menu, go down to vSAN / Disk Management.
For each disk group, click on ... then Remove.


You are given the option to migrate data. With an empty datastore, there is No data migration necessary.
Click on Remove.


Repeat for each of the nodes in the cluster, until the entire disk group has been cleared.
You can safely ignore error messages regarding the health of the disk group.

Turn off Services.

The same way you turned off the high-availability feature to set up vSAN, you will need to turn it off before you stop vSAN.


Once high-availability has been turned off, you can stop the vSAN service in the cluster properties by clicking Turn Off vSAN


Confirm by clicking ‘Turn Off’ in the next window.


vSan is now off.

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