Misc GRUB + boot related changes#27
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To match the behavior of our default ISO boot. Closes: #25
We switched to GRUB 2 for BIOS boot instead of isolinux in grml-live recently, see grml/grml-live#459 Now we no longer provide the expected files on our ISO any longer. Booting BIOS systems via PXE using grml-terminalserver on recent Grml ISOs now fails with: PXELINUX 6.04 PXE 20250811 Copyright (c) 1994-2015 H. Peter Anvin et al Failed to load ldlinux.c32 Boot failed: press a key to retry, or wait for reset... So point both isc-dhcp-server and dnsmasq at grub/i386-pc/core.0 for BIOS/legacy clients instead of pxelinux.0. The GRUB i386-pc netboot image is generated via grub-mknetdir (from grub2-common, requires grub-pc-bin for the i386-pc modules), and shares the same grub/grub.cfg already served to EFI clients. Generation is decided whether pxelinux.0 is present in the TFTP directory, which indicates that BIOS boot support is expected, regardless of how the terminalserver system itself booted. pxelinux.0 and pxelinux.cfg/default remain in the TFTP tree for backwards compatibility with clients that request pxelinux explicitly. While at it, also drop the legacy /lib/live/mount/medium and grml-live template fallback code paths from grub-pxelinux_config, keeping only the /run/live/medium path in use since December 2018. Closes: #26
Remove all pxelinux/syslinux installation and configuration code, now pxelinux.0, pxelinux.cfg/, boot.msg, logo.16, ISOLIN_PATH_, PXE_BOOT_MSG_, and PXE_BOOT_LOGO_ are all gone. The grub-pxelinux_config template gets renamed to grub-bios_config to reflect that GRUB now handles both BIOS and EFI network boot. The GRUB BIOS setup is handled depending on grub-pc-bin being present or not, which as expected skips the i386-pc setup on arm64. We drop the dependency on pxelinux, and add grub-pc-bin (as required by grub-mknetdir to generate grub/i386-pc/core.0) to Recommends, as we have an architecture all package.
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i think the problem here is a mismatch between what grml2usb expects and does and what the ISO provides and grml-terminalserver then copies. grml2usb always writes "multiboot" config, thus the grub config expects I think thats best fixed in grml2usb, either by adding vmlinuz, initrd copying to |
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Indeed. But what's strange is that even with the |
This needs further polishing and more thorough review yet, but it's initial working version for BIOS and EFI boot, AFAICT
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Alright, managed to get this initially working, at least for BIOS + EFI boot when booting |
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Addressing #26 (not yet ready though, messed up something about
/var/lib/tftpboot/boot/grub/grml*files which are missing and having wrong paths for kernel/initrd files then)