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How to bootstrap ESXi compute only node and connect to vSAN HCI Mesh?

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After documenting the process for bootstrapping vSAN Express Storage Architecture (ESA) using my Intel NUC 12 Pro, I was looking for an easier way to share my physical vSAN storage, which is powered by a single Supermicro E200-8D, to other physical ESXi hosts for testing purposes.

I had recently been playing with the vSAN HCI Mesh feature, which was launched back in 2020, as I was running out of spare NVMe devices when needing to test different physical hardware kits. While my use case for the storage is typically short lived, it means I do not have to play musical chairs with the limited number of NVMe devices I have installed in the various kits I have.

The vSphere UI in vCenter Server already provides a very simple workflow to mount a remote vSAN storage on an ESXi compute-only node, but I was also looking at this from a bootstrapping point of view and what if vCenter Server was not deployed or even available? Could I still make this work? After a bit of trial and error, I was able to figure out this can be accomplished by using a series of ESXCLI commands!

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How to bootstrap vSAN Express Storage Architecture (ESA) on unsupported hardware?

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I was recently chatting with a fellow colleague who asked an interesting question about the memory overhead between running vSAN Original Storage Architecture (OSA) versus the new vSAN Express Storage Architecture (ESA) from a VMware Homelab perspective. I honestly did not know the answer as I am only using vSAN OSA for my personal homelab. I was curious myself, especially its implicationn on small form factor (SFF) systems which typically max at out 64GB of memory.

Today, vSAN ESA is only officially supported when using vSAN ESA Ready Nodes which are all listed in the vSAN ESA HCL and the minimum amount of memory is 512GB. For the best possible experience and supported configurations, customers should only use approved vSAN ESA hardware and the use of any other systems will not yield the same benefits nor outcomes. As an aside, a fantastic resource for all things vSAN ESA can be found on the vSAN ESA TechZone page, which I highly recommend bookmarking as there is a lot of in-depth technical resources and collateral.

Disclaimer: This is not officially supported by VMware and is purely for educational purposes, use at your own risk.

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Enabling vSAN 8 Express Storage Architecture (ESA) using Nested ESXi

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To get the full benefits and support of the new vSAN 8 Express Storage Architecture (ESA), you will need modern hardware from the official vSAN ESA Ready Node HCL. However, from an education and learning point of view, you may want to explore some of the VSAN ESA workflows and easiest way to do that, well you probably know the answer .... it is using Nested ESXi of course!

With my recently published vSphere and vSAN 8 Lab Deployment Script, you can use that as the base and the Nested ESXi 8.0 IA Virtual Appliance to setup vSAN 8 ESA using virtual hardware 😀


There are only a couple of things to be aware of prior to setting up vSAN ESA using Nested ESXi.

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