How do I move a VM from Scale to CORE

[hypercoffeedude]

Hey everyone, I have two servers running TrueNAS in a home environment. My main server has TrueNAS-13.0-U1 and my backup server is on TrueNAS-SCALE-22.02-RC.2. I have decided to stick with core and I need to move a VM from SCALE to CORE. What is the best way to accomplish this? I know I could probably do this with Clonezilla, but is there a simpler way?

 

[c77dk]

I haven't tried it (did a reinstall back to CORE instead), but you might want to look into zfs send/zfs receive of the zvol. And then recreate VM using the zvol as storage

 

[hypercoffeedude]

I haven't tried it (did a reinstall back to CORE instead), but you might want to look into zfs send/zfs receive of the zvol. And then recreate VM using the zvol as storage

Thank you, I had not thought of that. I took a snapshot of my VMs, then did a zfs send/recv over netcat and had great success with one of them. I was running a Home Assistant VM which booted right up (uefi) after the move, and a second VM for running Docker images (Legacy BIOS) that did not boot. I am not sure how to get a VM that was set up for Legacy BIOS to boot properly on CORE. I tried selecting GRUB as opposed to UEFI, but it just gives me an error.

Code:

Call Error
[EFAULT] Unable to find boot device for '5_Docker' domain

 

[Samuel Tai]

VM GRUB boot on Core is quite finicky.

grub boot HOW-TO

There was very little documentation on how to create a VM that boots from GRUB in the GUI. I had to go digging in /usr/local/lib/python3.7/site-packages/middlewared/plugins/vm.py to figure out how to do this successfully. I found there are 2 required parameters that aren't accessible from the...

www.truenas.com

There are 2 properties that aren't available from the UI, only via API. Also, a GRUB VM can't boot from a zvol, only from a RAW file; you can achieve this by using dd to copy from the zvol to a RAW file, and creating a RAW file device for the VM.