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Packer reference for PhotonOS Arm NFS Virtual Appliance using OVF properties for ESXi-Arm

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In case the title was not descriptive enough, I was curious if I could build an Arm Virtual Appliance (OVA) using OVF properties that would allow for all sorts of interesting guest customizations which I have blogged about before here, here, here and here using x86 PhotonOS as a reference implementation. My idea for this actually pre-dated the release of the ESXi on Arm Fling, but it was only until recently with support for VMware Tools for Photon OS Arm, was I able to finally piece together this solution.

It was also neat to see that I could build an Arm OVA using x86 tooling (Packer and OVFTool) which ran on my desktop and you simply needed an ESXi-Arm host. This really goes to show the level of compatibility from a management and vSphere API point of view that an ESXi-Arm host behaves just like a standard x86 ESXi host!

To demonstrate a more interesting use case than just basic network customization for the ?first? Arm OVA, I thought it would be useful to setup a simple NFS appliance that would take input from the user such the size of the exported volume (default 60GB) and then the name of the mount point. Upon first boot up, there is a guest customization script that would read in the OVF properties and configure the networking, OS password and NFS server configuration which you can certainly use to host your Arm VMs.

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Full OVA/OVF property support coming to Terraform provider for vSphere

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Terraform is one of the most popular Infrastructure as Code (IaC) tool out there today and it should come as no surprise there is Terraform provider for vSphere which many of our customers have been using. In fact, VMware just recently released a couple more new providers (here and here) supporting VMware Cloud on AWS and NSX-T solutions respectively.

Although I have used Terraform and the vSphere provider in the past, it has not been my tool of choice for automation as it still lacks a number of basic vSphere capabilities which I require on a regular basis. The most common one being the ability to deploy a Virtual Appliance (OVA/OVF) which has been my biggest barrier and I know this has been a highly requested feature from the community as well.

In early May of this year, I noticed that v1.18 of the vSphere provider finally added support for OVA/OVF deployment and I was pretty excited to give this a try and may even have been the first to kick the tires on this feature? Although OVA/OVF support was added, it looks like support for customizing OVF properties which is commonly included as part of an OVA/OVF would only possible if you are cloning from an existing imported OVA/OVF image. One of the most common use case is to import an OVF/OVA from either your local computer or from a URL and it looks like this use case was not possible.

I filed two Github issues, one for supporting OVF properties for initial OVA/OVF deployment and another regarding a bug I ran into when importing OVA/OVF from a remote URL. Just yesterday, I got the good news that my feature request has been completed and I was given an early drop of the vSphere provider to try out this feature. I may have also hinted to the Engineering team to use my popular Nested ESXi Appliance OVA as a reference test implementation as I knew this was something many customers will want to deploy 🙂

UPDATE (11/05/21) - Thanks to Ryan Johnson, it looks like there has been some changes to the Terraform Provider for vSphere in how to deploy OVF/OVA. I've gone ahead an updated the example below to reflect these changes, it certainly looks a bit more verbose than before, which is a bit unfortunate from readability standpoint.

UPDATE (06/23/20) - Support for OVA/OVF properties is now available as part of 1.20 of the Terraform Provider for vSphere

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Packer reference for building PhotonOS Virtual Appliance using OVF properties 

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I was introduced to HashiCorp Packer several years back by Timo  Tsugliani, who if you are not following on Twitter, you are missing a TON of really useful nuggets which this guys shares both VMware/IT related and cool stuff. I am constantly learning about new things things from Timo and this guys is just a wealth of knowledge if you get the chance to work with him. At the time, I had played with Packer for a bit but did not have an actual use case for it, so I mostly forgot about it.

Fast forward a few years later and with recent projects like the vCenter Event Broker Appliance (VEBA) Fling, I have really spent time learning about Packer in greater depth and I now realize how powerful Packer is for building various artifacts including VMware-based templates that is not only easy but consistently from source control.  It took me awhile to get to the aha moment but now I use Packer for so many different things to help simplify my life.

With the recent open sourcing of our VEBA Fling which includes the use of PhotonOS and Packer, I was reminded of a blog series that I did earlier on how to build your own Linux and/or Windows Virtual Appliance using OVF properties (Part 1, Part 2 and Part 3). I realized it would have been useful to have an actual reference implementation on building a very simple PhotonOS Virtual Appliance that exercises some basic OVF properties so folks could quickly get started beyond the manual steps that were documented.  I was also motivated by a chat I had with Luc Dekens (Godfather of PowerCLI) last week on some of the Automation he was trying to with PhotonOS and I figured this might be something he and others could also benefit from.

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