Ironic-local-boot-kernel-parameters-script

This is an reference script to pass kernel parameters to ironic local boot instances by using configdrive. This only works with Ubuntu image and users should modify this script to fit their use case:

#!/usr/bin/env python import os # Default grub2 config file in Ubuntu grub_file = '/etc/default/grub' # Add parameters here to pass to instance. kernel_parameters = ['quiet', 'splash'] grub_cmd = 'GRUB_CMDLINE_LINUX' old_grub_file = grub_file+'~' os.rename(grub_file, old_grub_file) cmdline_existed = False with open(grub_file, 'w') as writer, \ open(old_grub_file, 'r') as reader: for line in reader: key = line.split('=')[0] if key == grub_cmd: #If there is already some value: if line.strip[-1] == '"':                     line = line.strip[:-1] + ' ' + ' '.join(kernel_parameters) + '"' cmdline_existed = True writer.write(line) if not cmdline_existed: line = grub_cmd + '=' + '"' + ' '.join(kernel_parameters) + '"' writer.write(line) os.remove(old_grub_file) os.system('update-grub') os.system('reboot')