[CentOS] Booting from an ISO file in a XFS /boot partition

Thu Apr 8 09:30:23 UTC 2021
Leon Fauster <leonfauster at googlemail.com>

On 08.04.21 11:16, Gestió Servidors wrote:
> Hi,
> I want to boot with a customized iPXE iso boot file from my GRUB2 menu. My system is running CentOS-7, with /boot formated as XFS filesystem. After copying my iPXE.iso into /boot, I have created a custom GRUB2 file in /etc/grub.d/40_custom like this:
> menuentry "iPXE" {
>                 set isofile="/ipxe.iso"
>                 loopback loop (hd0,1)$isofile
>                 linux16 (loop)/ipxe.lkrn
> }
> After regenerating grub2.cfg with "grub2-mkconfig -o /etc/grub2.cfg ,  I have rebooted my system, I have chosen "iPXE" entry, but system doesn't boot. I receive this error:
> error: file '/ipxe.iso' not found.
> Starting /ipxe.iso...
> error: no server is specified.
> Press any key to continue...
> However, in another similar system that runs /boot in EXT4 filesystem, that ISO file boots perfectly with the same configuration, so it seems the problem is with XFS.
> Could you help me?

Just guessing - loading the grub module for xfs is missing?