For testing purposes I need to deploy systems from a custom ISO image.
I’ve tried using Grub2 to create a loopback from my custom image, a stock Ubuntu server image and a stock Debian image - none of which are able to successfully boot with a useable console.
I’ve thought of creating a RAMDisk to boot from as well, so I can use dd over SSH to write my image, from a remote source, directly to the block device. However, I am unable to get this to work.
My image is a modified version of the Proxmox Mail Gateway ISO, though the modifications can be made following a vanilla installation as well… I’ve been unable to get Proxmox’s stock image to boot.
At this point I’m at a loss for what to attempt next. Any suggestions?