Change boot/dietpi.txt on proxmox?

General Discussion
1

I’ve been using DietPi on some Pi3B+ for a while fine. I’ve found it really helpful to store boot/dietpi.txt files elsewhere for when I need to reinstall things.

I’ve now got a couple of mini pcs running Proxmox in a cluster, and I’d like to use the same approach of backing up the boot/dietpi.txt files so I can recreate VMs easily. However, I’m not sure how to go about modifying the boot/dietpi.txt file between the initial install and the first boot. With a Pi one can mount the sdcard after its been written to, but with with proxmox should I be mounting the virtual drive on a different vm to modify the boot/dietpi.txt file? Is there another approach I’m not considering?

2

In fact, VM images behave differently from RPi or other SBCs. The only options here are either to modify the image before writing it or to mount the virtual disk elsewhere afterward.