openstack/diskimage-builder
Code Issues Proposed changes
diskimage-builder/diskimage_builder/elements/bootloader/README.rst
Steve Baker d56dd56881 Allow custom console=tty0 argument 
The bootloader element now has variable
DIB_BOOTLOADER_VIRTUAL_TERMINAL to customize or suppress the
console=tty0 kernel argument.

This is proposed to allow console=tty0 to be removed entirely as it is
causing significant performance degredation in DPDK environments.

Change-Id: Iba2ee5b8a6b4acdd236a770550dffd29c784ce11
Related: rhbz#2179366
2023-04-11 17:15:12 +12:00

847 B
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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.
  • 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.