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diskimage-builder/diskimage_builder/elements/bootloader
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Steve Baker 97f940ace5 Support grubby and the Bootloader Spec 
Fedora 30 and RHEL-8.2 onwards support the Bootloader Spec and use grubby
to manage kernel menu entries and kernel arguments.
https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault

This change detects if this is a BLS enabled environment, and uses
grubby to set kernel arguments on all kernel entries if it is.

Change-Id: I2701260d54cf6bc79f1ac765b512d99d799e8c43
2021-09-13 09:32:53 +12:00
..
environment.d update grub cmdline to current kernel parameters 2020-06-14 00:39:42 -05:00
finalise.d Support grubby and the Bootloader Spec 2021-09-13 09:32:53 +12:00
pkg-map Do not uninstall non-installed packages 2021-05-25 23:32:16 -05:00
README.rst bootloader: remove extlinux/syslinux path 2021-05-13 10:33:06 +10:00

README.rst 

==========
bootloader
==========

Installs ``grub[2]`` on boot partition on the system.

Arguments
=========

* ``DIB_GRUB_TIMEOUT`` sets the ``grub`` menu timeout.  It defaults to
  5 seconds.  Set this to 0 (no timeout) for fast boot times.

* ``DIB_BOOTLOADER_DEFAULT_CMDLINE`` sets parameters that are appended
  to the ``GRUB_CMDLINE_LINUX_DEFAULT`` values in ``grub.cfg``
  configuration. It defaults to ``nofb nomodeset gfxpayload=text``.

* ``DIB_BOOTLOADER_SERIAL_CONSOLE`` sets the serial device to be
  used as a console. It defaults to ``hvc0`` for PowerPC, 
  ``ttyAMA0,115200`` for ARM64, otherwise ``ttyS0,115200``.