Thanks a mill for the pointers. my grub2 was looking for regexp.mod in /EFI/BOOT/x86_64-efi/regexp.mod
and not finding it.
Aug 30 17:21:13 foremantest in.tftpd[13860]: RRQ from 192.168.178.172 filename /grub2/grub.cfg
Aug 30 17:21:13 foremantest in.tftpd[13861]: RRQ from 192.168.178.172 filename /EFI/BOOT/x86_64-efi/regexp.mod
Aug 30 17:21:13 foremantest in.tftpd[13861]: sending NAK (1, File not found) to 192.168.178.172
Aug 30 17:21:13 foremantest in.tftpd[13862]: RRQ from 192.168.178.172 filename /grub2/grub.cfg-01------
Once I created that folder structure and copied the file there the regex worked
Aug 30 17:23:38 foremantest in.tftpd[13984]: RRQ from 192.168.178.172 filename /grub2/grub.cfg
Aug 30 17:23:38 foremantest in.tftpd[13985]: RRQ from 192.168.178.172 filename /EFI/BOOT/x86_64-efi/regexp.mod
Aug 30 17:23:38 foremantest in.tftpd[13986]: RRQ from 192.168.178.172 filename /grub2/grub.cfg-01-f4-4d-30-60-d1-fd
and fdi is now successfully registering the discovery in foreman
Bit of a hack, but it’s working. Now to figure out why my grub wants that file/folder structure…
thanks again!