Support for UEFI with Grub2

[christiantosta]

First off all, thanks for this great project!
Is it possible to add support for boot with UEFI/GPT and Grub2?

[Adphi]

Hi @christiantosta , thanks for the kind words!

d2vm can already produce a UEFI-bootable image with GRUB 2 using --bootloader=grub-efi.

That will create a FAT32 EFI System Partition on a GPT disk and install GRUB2 in EFI mode.

Let me know if you run into any issues!

[stuart11n]

FYI. grub2-install may throw this error:

grub2-install: error: This utility should not be used for EFI platforms because it does not support UEFI Secure Boot. If you really wish to proceed, invoke the --force option.
Make sure Secure Boot is disabled before proceeding.

I have no idea if this is distro or version specific (I'm building Rocky Linux VM on Fedora). I got around it with a change in grub-efi.go.

[Adphi]

Thanks @stuart11n for reporting this.

UEFI is not supported for CentOS and Rocky Linux isn’t officially on our support matrix, so you may run into issues like that one.
If you need CentOS / Rocky Linux support, pull requests are more than welcome!

[stuart11n]

Thanks @stuart11n for reporting this.

UEFI is not supported for CentOS and Rocky Linux isn’t officially on our support matrix, so you may run into issues like that one. If you need CentOS / Rocky Linux support, pull requests are more than welcome!

yeah it doesn't work :-)

I actually hit a similar issue to my first issue back in 2024:

#59

However, I got CentOS (and Rocky) working (BIOS mode), so I'll back-track and see if the issue in anyway similar.

[Raboo]

@Adphi Ok, Is there any historic context?
Someone tried to add support before and it failed because of some specific issue? Or simply just never tried to implement it?
Any advice on where to start for adding support?

[Raboo]

I started a draft PR #90. It's mostly vibe-coded since I'm not a go developer.. I was able to build an image. I am going to test some images before I make the draft into a real PR. But please have a look already to see if any feedback is needed.

[Raboo]

@Adphi PR is now ready for review.