Ironic-boot-kernel-parameters

This is a reference script to passing kernel paramters to ironic localboot instance using configdrive. This only works with ubuntu image, so users should modify this script by their own 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')