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Keno Fischer
c7e8cffcb2
The current documentation for using OpenWRT on Mellanox Spectrum switches (https://openwrt.org/toh/mellanox/spectrum) suggests reflashing the entire harddrive from the recovery USB. This is not the most friendly way to install a new OS on these switches. From factory, they come with ONIE (Open Network Install Environment), which is a linux-based preboot environment for fetching an OS image from the network and installing it on disk. The installer is a self-executing bash script that executes inside the ONIE environment. The installer is expected to preserve the ONIE partition for use as recovery environement. To be a better citizen on these platforms, it would be preferrable to provide OpenWRT as an ONIE-compatible installer. This PR adds an ONIE_INSTALLER_IMAGES build option that produces an ONIE compatible .bin. The generated .bin follows the ONIE demo installer pattern [1]: it creates a new GPT partition labelled OPENWRT-ROOT on the ONIE install device, formats ext4, extracts the OpenWrt rootfs and kernel into it, installs GRUB into the existing UEFI ESP under bootloader-id "OpenWrt", and adds a NVRAM boot entry via efibootmgr. ONIE-BOOT is preserved so ONIE rescue remains available. Tested with the config at [2] on a Mellanox Spectrum SN3800 to produce a booting OpenWRT install. [1] https://github.com/opencomputeproject/onie/demo/installer/grub-arch/install.sh [2] https://gist.github.com/Keno/abc8c5b72645e73fadd1ff0d9616b23d Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> Signed-off-by: Keno Fischer <keno@juliahub.com> Link: https://github.com/openwrt/openwrt/pull/23062 Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>