openstack/diskimage-builder
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diskimage-builder/diskimage_builder/elements/bootloader
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Steve Baker 52e2965c21 Add DIB_SKIP_GRUB_PACKAGE_INSTALL for bootloader 
Some base images will be known to have the required grub packages
installed already so package installation can be skipped.

This is specifically for the case where the base image was built by dib,
and installing any packages is undesirable because repos are not set up.

Change-Id: I0beab9e93838845a0ee533c7e6c7a4980cadd9b3
2024-09-04 09:23:00 +12:00
..
environment.d Add DIB_SKIP_GRUB_PACKAGE_INSTALL for bootloader 2024-09-04 09:23:00 +12:00
finalise.d Add DIB_SKIP_GRUB_PACKAGE_INSTALL for bootloader 2024-09-04 09:23:00 +12:00
pkg-map Replace OpenSUSE Leap 15.3 to OpenSUSE Leap 15.5 2024-01-05 10:54:23 +01:00
README.rst Add DIB_SKIP_GRUB_PACKAGE_INSTALL for bootloader 2024-09-04 09:23:00 +12:00

README.rst

bootloader

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

Arguments

  • DIB_GRUB_TIMEOUT sets the grub menu timeout. It defaults to 1 seconds. Set this to 0 (no timeout) for fast boot times.
  • DIB_GRUB_TIMEOUT_STYLE sets the visibility of the grub menu. It defaults to hidden (or countdown as an alias). Set this to menu to display the menu and then wait for the timeout set by DIB_GRUB_TIMEOUT to expire before booting the default entry.
  • 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_USE_SERIAL_CONSOLE allows usage of a serial console to be disabled in the resulting image by setting to a value of False.
  • 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.
  • DIB_BOOTLOADER_VIRTUAL_TERMINAL sets the virtual terminal be used as a console. It defaults to tty0. When explicitly set to an empty string then no virtual terminal console kernel argument is added.
  • DIB_NO_TIMER_CHECK allows the default kernel argument, no_timer_check to be removed from the kernel command line when the value is set to False.
  • DIB_SKIP_GRUB_PACKAGE_INSTALL when set to True will not install any grub packages, and will assume all necessary packages are already installed.