diskimage-builder/diskimage_builder/elements/bootloader/README.rst
Yolanda Robla 11275c212b Send custom parameters in bootloader to GRUB_CMDLINE
Depending on the types of deployment (security, nfv...) some extra
kernel flags are needed on the images. This change exposes the
DIB_BOOTLOADER_DEFAULT_CMDLINE parameter, defaulting to the
existing 'nofb nomodeset vga=normal', that will allow to modify
these boot params.

Change-Id: I67d191fa5ca44a57f776cb9739a02dd71212969c
Closes-Bug: #1668890
2017-03-08 15:43:46 +01:00

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==========
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_CMD_LINE`` sets the CMDLINE parameters that
are appended to the grub.cfg configuration. It defaults to
'nofb nomodeset vga=normal'