Difference between revisions of "Ironic-boot-kernel-parameters"
(Created page with "#!/usr/bin/env python import os grub_file = '/etc/default/grub' kernel_parameters = ['quiet', 'splash'] grub_cmd = 'GRUB_CMDLINE_LINUX' old_grub_file = grub_file+'~' os.rena...") |
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| − | #!/usr/bin/env python | + | This is a reference script to passing kernel paramters to ironic localboot instance using configdrive. |
| − | import os | + | This only works with ubuntu image, so users should modify this script by their own use case: |
| + | |||
| + | #!/usr/bin/env python | ||
| + | import os | ||
| − | grub_file = '/etc/default/grub' | + | # Default grub2 config file in Ubuntu |
| − | kernel_parameters = ['quiet', 'splash'] | + | grub_file = '/etc/default/grub' |
| − | grub_cmd = 'GRUB_CMDLINE_LINUX' | + | # Add parameters here to pass to instance. |
| − | old_grub_file = grub_file+'~' | + | kernel_parameters = ['quiet', 'splash'] |
| − | os.rename(grub_file, old_grub_file) | + | grub_cmd = 'GRUB_CMDLINE_LINUX' |
| − | cmdline_existed = False | + | old_grub_file = grub_file+'~' |
| − | with open(grub_file, 'w') as writer, \ | + | 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.remove(old_grub_file) |
| − | os.system('update-grub') | + | os.system('update-grub') |
| − | os.system('reboot') | + | os.system('reboot') |
Revision as of 09:13, 25 May 2016
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')
