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Integrating with GRUB

This section describes the Yocto configuration needed to integrate with the GRUB bootloader, which is most commonly used on x86 based systems.

Enabling GRUB

You can enable Mender integration with GRUB by turning on the mender-grub feature using MENDER_FEATURES_ENABLE. For instance, in your local.conf:

MENDER_FEATURES_ENABLE_append = " mender-grub"

If the architecture is x86 or x86-64, and the mender-full class is inherited, then the mender-grub feature is already on by default. See the documentation on features for more information.

BIOS based systems

If using GRUB, Mender by default assumes that the system is using the UEFI boot standard. For systems using BIOS based booting, the mender-bios feature should also be enabled using MENDER_FEATURES_ENABLE.

The mender-bios feature was introduced in the meta-mender sumo branch, corresponding to the Yocto Project 2.5 sumo release, and is not available in earlier branches.