I configured a dhcp and tftp server, for my tests, I used at first time, syslinux to boot over PXE network successfully.
Now I want to use grub instead of syslinux to boot, in order to do that, I issued the command
grub-mknetdir --net-directory=<my_tftp_root_dir>, and modified the file to be served in
PXE boot works but I am always getting the error about
root variable unset, and I get into grub rescue mode.
If I manually issue the commands:
set root=(tftp,10.50.1.10) set prefix=(tftp,10.50.1.10) insmod normal normal
Then I can correctly see the grub.cfg menu entries and boot whatever is there..
But I want that to be done automatically and get the grub menu without manual intervention.
Already drove myself crazy reading without any positive feedback, so I am out of ideas of how to set, both root and prefix so grub can start correctly.
Thanks for any suggestions/hints, this PXE thing is a new world to me yet.
EDIT: Playing around, the best thing I could do is to generate again the image with:
grub-mkimage -O i386-pc-pxe --output /warehouse/TFTProot/boot/grub/i386-pc/core.0 --prefix='(tftp,10.50.1.10)/boot/grub' pxe tftp
And don't rely on the autogenerated one, but isn't there any better solution than to regenerate it manually? As
grub-mknetdir generates it already.