openstack/diskimage-builder
Code Issues Proposed changes
diskimage-builder/diskimage_builder/elements/bootloader
History
Andrei Nistor 0e5e358063 bootloader: make serial console configurable 
Currently, the serial console is hardcoded to ttyS0 in the bootloader
element.  This is a challenge for users that want to build images for
some baremetal servers. Supermicro servers, for example, use ttyS1 for
the serial over lan interface.

This patch adds a new environment variable DIB_BOOTLOADER_SERIAL_CONSOLE
that can be set to override the default.

Change-Id: Ie8173be8690ac0b7164ce9e5b66d3c1c18f844d6
2019-10-03 21:49:53 +00:00
..
cleanup.d
Use [[ for =~ matches
2017-08-28 17:01:03 +10:00
environment.d
bootloader: make serial console configurable
2019-10-03 21:49:53 +00:00
finalise.d
bootloader: make serial console configurable
2019-10-03 21:49:53 +00:00
pkg-map
Use x86 architeture specific grub2 packages for RHEL
2019-09-12 15:06:17 -04:00
README.rst
bootloader: make serial console configurable
2019-10-03 21:49:53 +00:00

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 vga=normal.
  • 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.