Re: GRUB2 and mkstandalone for PXE Booting

[Andrei Borzenkov]

12.08.2016 23:05, Dan Powers пишет:
> Hello All,
> I have a question about grub-mkstandalone. Perhaps this is a Debian
> question but I thought I would start here. I am running version
> 2.02~beta2-22+deb8u1. I've been staring at the man page as well as digging
> through the help-grub archive and I can't seem to figure out how to do this
> right. I have been using pxelinux for some time so PXE / TFTP booting is
> not new for me, except for the UEFI / GRUB2 part.
> 
> 
> I am trying to make a standalone GRUB UEFI file for PXE booting with the
> command below. The grub.cfg file I am trying to use is specific for my PXE
> boot.
> 
> cd /home/dan/pxebuild/
> grub-mkstandalone -d /usr/lib/grub/x86_64-efi/ -O x86_64-efi
> --fonts="unicode" -o bootx64.efi grub.cfg
> 
> I then copy the output bootx64.efi to my tftp server and my laptop
> successfully loads the file via UEFI Onboard NIC(IPV4). When I PXE boot the
> file it just brings me to a prompt 'grub> '. If I type in 'ls (memdisk)/' I
> can see the grub.cfg file right there and I can load it with 'configfile
> (memdisk)/grub.cfg'. I would prefer to just have the grub.cfg file load
> automatically but I can't seem to tell 'grub-mkstandalone' to place the
> grub.cfg file in the correct path '(memdisk)/boot/grub/grub.cfg'.
> 

>From grub-mkstandalone --help

Graft point syntax (E.g. /boot/grub/grub.cfg=./grub.cfg) is accepted


> If I move my real /boot/grub/grub.cfg file out of the way temporarily and
> place my PXE grub.cfg file in it's place everything PXE boots as I expect.
> 
> mv /boot/grub/grub.cfg /boot/grub/grub.cfg.orig
> cp /home/dan/pxebuild/grub.cfg /boot/grub/grub.cfg
> grub-mkstandalone -d /usr/lib/grub/x86_64-efi/ -O x86_64-efi
> --fonts="unicode" -o bootx64.efi /boot/grub/grub.cfg
> rm /boot/grub/grub.cfg
> mv /boot/grub/grub.cfg.orig /boot/grub/grub.cfg
> 
> 
> I would rather not do the extra steps and was hoping I am just doing
> something wrong.
> 
> Thanks,
> Dan
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