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diskimage-builder/diskimage_builder/elements/bootloader
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Steve Baker 69bf654eba Add efibootmgr utility for UEFI boot menu management 
As of grub2 >= 2.02-95 calling grub2-install on an EFI partition will
fail with: "this utility cannot be used for EFI platforms because it
does not support UEFI Secure Boot." In the case of ironic deployments,
ironic-python-agent will call efibootmgr to set the local boot for
subsequent boots.

This change adds efibootmgr to the image as well so any other UEFI
menu changes can be made manually.

Change-Id: I765ded15da07d6227d1e337960e54ad0e0d6ca39
2021-03-05 10:00:49 +13:00
..
cleanup.d update grub cmdline to current kernel parameters 2020-06-14 00:39:42 -05:00
environment.d update grub cmdline to current kernel parameters 2020-06-14 00:39:42 -05:00
finalise.d bootloader: remove dangling grubenv links 2020-09-08 18:04:42 +10:00
pkg-map Add efibootmgr utility for UEFI boot menu management 2021-03-05 10:00:49 +13:00
README.rst update grub cmdline to current kernel parameters 2020-06-14 00:39:42 -05:00

README.rst 

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

Installs ``grub[2]`` on boot partition on the system. In case GRUB2 is
not available in the system, a fallback to Extlinux will happen. It's
also possible to enforce the use of Extlinux by exporting a
``DIB_EXTLINUX`` variable to the environment.

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``.