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import io | |
import pathlib | |
import pycdlib | |
ubuntu = pathlib.Path('ubuntu-22.04.1-live-server-amd64.iso') | |
new_iso_path = pathlib.Path('ubuntu-22.04.1-live-server-amd64-auto.iso') | |
iso = pycdlib.PyCdlib() | |
iso.open(ubuntu) | |
extracted = io.BytesIO() | |
iso.get_file_from_iso_fp(extracted, iso_path='/BOOT/GRUB/GRUB.CFG;1') | |
extracted.seek(0) | |
data = extracted.read() | |
print(data.decode()) | |
new = data.replace(b' ---', b'quiet autoinstall ds=nocloud\;s=/cdrom/nocloud/ ---') | |
print(new.decode()) | |
iso.rm_file(iso_path='/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg') | |
iso.add_fp(io.BytesIO(new), len(new), '/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg') | |
iso.add_directory('/NOCLOUD', rr_name='nocloud') | |
user_data = b"""#cloud-config | |
autoinstall: | |
version: 1 | |
identity: | |
hostname: ubuntu-server | |
password: "$6$exDY1mhS4KUYCE/2$zmn9ToZwTKLhCw.b4/b.ZRTIZM30JZ4QrOQ2aOXJ8yk96xpcCof0kxKwuX1kqLG/ygbJ1f8wxED22bTL4F46P0" | |
username: ubuntu | |
""" | |
iso.add_fp(io.BytesIO(user_data), len(user_data), '/NOCLOUD/USER_DATA;1', rr_name='user-data') | |
iso.add_fp(io.BytesIO(b''), len(b''), '/NOCLOUD/META_DATA;1', rr_name='meta-data') | |
iso.write(new_iso_path) | |
iso.close() |
import io | |
import pathlib | |
import pycdlib | |
ubuntu = pathlib.Path('ubuntu-22.04.1-live-server-amd64.iso') | |
new_iso = pathlib.Path('ubuntu-22.04.1-live-server-amd64-auto.iso') | |
iso = pycdlib.PyCdlib() | |
iso.open(ubuntu) | |
extracted = io.BytesIO() | |
iso.get_file_from_iso_fp(extracted, iso_path='/BOOT/GRUB/GRUB.CFG;1') | |
extracted.seek(0) | |
data = extracted.read() | |
print(data.decode()) | |
new = data.replace(b' ---', b'quiet autoinstall ---').replace(b'timeout=30', b'timeout=1') | |
print(new.decode()) | |
iso.rm_file(iso_path='/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg') | |
iso.add_fp(io.BytesIO(new), len(new), '/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg') | |
iso.write(new_iso) | |
iso.close() |
import io | |
import pathlib | |
import pycdlib | |
new_iso = pathlib.Path('ubuntu-22.04-auto.iso') | |
iso = pycdlib.PyCdlib() | |
iso.new(rock_ridge='1.09', vol_ident='CIDATA') | |
user_data = b"""#cloud-config | |
autoinstall: | |
version: 1 | |
identity: | |
hostname: ubuntu-server | |
password: "$6$exDY1mhS4KUYCE/2$zmn9ToZwTKLhCw.b4/b.ZRTIZM30JZ4QrOQ2aOXJ8yk96xpcCof0kxKwuX1kqLG/ygbJ1f8wxED22bTL4F46P0" | |
username: ubuntu | |
""" | |
iso.add_fp(io.BytesIO(user_data), len(user_data), '/USERDATA;1', rr_name='user-data') | |
iso.add_fp(io.BytesIO(b''), len(b''), '/METADATA;1', rr_name='meta-data') | |
iso.write(new_iso) | |
iso.close() |
For changing the grub menu, just do a complete replacement of it, you can delete menu points, and edit timeout parameters if needed.
Example untested:
import io
import pathlib
import pycdlib
ubuntu = pathlib.Path('ubuntu-22.04.1-live-server-amd64.iso')
new_iso = pathlib.Path('ubuntu-22.04.1-live-server-amd64-auto.iso')
iso = pycdlib.PyCdlib()
iso.open(ubuntu)
extracted = io.BytesIO()
iso.get_file_from_iso_fp(extracted, iso_path='/BOOT/GRUB/GRUB.CFG;1')
extracted.seek(0)
data = """YOUR GRUB CFG FILE HERE
"""
iso.rm_file(iso_path='/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg')
iso.add_fp(io.BytesIO(data), len(data), '/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg')
iso.write(new_iso)
iso.close()
Great work, any chance you can add in the md5 process to remove the verification issue from the edit of grub and to just plain remove the enforced check?
Clear out the md5sum.txt file to cancel install verification of files.
iso.rm_file(iso_path='/md5sum.txt;1', rr_name='md5sum.txt')
iso.add_fp(io.BytesIO("", len(""), '/md5sum.txt;1', rr_name='md5sum.txt')
You could edit the md5 sum of grub in that file if you felt like it for real verification..
Thanks, I personally don't require a verification check. I just happened to notice during the process it was failing validation from the change to the grub.cfg. Thanks for posting the additional content to disable the check and thanks for your work! Made my life easier that's for sure :)
Made some modifications to disable the verifications for future reference.
import io
import pathlib
import pycdlib
ubuntu = pathlib.Path('ubuntu-20.04.5-live-server-amd64.iso')
new_iso = pathlib.Path('ubuntu-20.04.5-live-server-amd64-auto.iso')
iso = pycdlib.PyCdlib()
iso.open(ubuntu)
extracted = io.BytesIO()
iso.get_file_from_iso_fp(extracted, iso_path='/BOOT/GRUB/GRUB.CFG;1')
extracted.seek(0)
data = extracted.read()
print(data.decode())
new = data.replace(b'Install Ubuntu Server', b'Autoinstall Ubuntu Server - Disabled Verfification').replace(b' ---', b'quiet autoinstall fsck.mode=skip ---').replace(b'timeout=30', b'timeout=1')
print(new.decode())
iso.rm_file(iso_path='/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg')
iso.add_fp(io.BytesIO(new), len(new), '/BOOT/GRUB/GRUB.CFG;1', rr_name='grub.cfg')
iso.write(new_iso)
iso.close()
@porala you can try to edit boot/grub/grub.cfg , update the timeout parameter