121 lines
4.4 KiB
ReStructuredText
121 lines
4.4 KiB
ReStructuredText
mkksiso
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=======
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:Authors:
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Brian C. Lane <bcl@redhat.com>
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``mkksiso`` is a tool for creating kickstart boot isos. In it's simplest form
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you can add a kickstart to a boot.iso and the kickstart will be executed when
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the iso is booted. If the original iso was created with EFI and Mac support the
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kickstart boot.iso will include this support as well.
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``mkksiso`` needs to be run as root, it depends on mounting the original iso
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and you need to be root to be able to do that.
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mkksiso cmdline arguments
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-------------------------
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Add a kickstart and files to an iso
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``usage: mkksiso [-h] [-a ADD_PATHS] [-c CMDLINE] [--debug] ks input_iso output_iso``
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Optional arguments
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^^^^^^^^^^^^^^^^^^
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-h, --help show this help message and exit
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-a ADD_PATHS, --add ADD_PATHS
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File or directory to add to ISO (may be used multiple
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times)
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-c CMDLINE, --cmdline CMDLINE
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Arguments to add to kernel cmdline
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--debug print debugging info
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Positional arguments
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^^^^^^^^^^^^^^^^^^^^
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:ks: Kickstart to add to the ISO
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:input_iso: ISO to modify
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:output_iso: Full pathname of iso to be created
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Create a kickstart boot.iso or DVD
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----------------------------------
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Create a kickstart like you normally would, kickstart documentation can be
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`found here <https://pykickstart.readthedocs.io/en/latest/>`_, including the
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``url`` and ``repo`` commands. If you are creating a DVD and only need the
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content on the DVD you can use the ``cdrom`` command to install without a
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network connection. Then run ``mkksiso`` like this::
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mkksiso /PATH/TO/KICKSTART /PATH/TO/ISO /PATH/TO/NEW-ISO
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This will create a new iso with the kickstart in the root directory, and the
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kernel cmdline will have ``inst.ks=...`` added to it so that it will be
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executed when the iso is booted (be careful not to boot on a system you don't
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want to wipe out! There will be no prompting).
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Adding package repos to a boot.iso
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----------------------------------
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You can add repo directories to the iso using ``--add /PATH/TO/REPO/``, make
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sure it contains the ``repodata`` directory by running ``createrepo_c`` on it
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first. In the kickstart you can refer to the directories (and files) on the iso
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using ``file:///run/install/repo/DIRECTORY/``. You can then use these repos in
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the kickstart like this::
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repo --name=extra-repo --baseurl=file:///run/install/repo/extra-repo/
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Run ``mkksiso`` like so::
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mkksiso --add /PATH/TO/REPO/ /PATH/TO/KICKSTART /PATH/TO/ISO /PATH/TO/NEW-ISO
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Create a liveimg boot.iso
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-------------------------
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You can use the kickstart `liveimg command
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<https://pykickstart.readthedocs.io/en/latest/kickstart-docs.html#liveimg>`_,
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to install a pre-generated disk image or tar to the system the iso is booting
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on.
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Create a disk image or tar with ``lorax-composer`` or ``livemedia-creator``,
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make sure the image includes tools expected by ``anaconda``, as well as the
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kernel and bootloader support. In ``lorax-composer`` use the ``liveimg-tar``
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image type. If you plan to install it to a UEFI machine make sure to include
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``grub2-efi`` and ``efibootmgr`` in the blueprint.
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Add the ``root.tar.xz`` file to the iso using ``--add /PATH/TO/ROOT.TAR.XZ``,
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and in the kickstart reference it with the ``liveimg`` command like this::
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liveimg --url=file:///run/install/repo/root.tar.xz
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It is also a good idea to use the ``--checksum`` argument to ``liveimg`` to be
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sure the file hasn't been corrupted::
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mkksiso --add /PATH/TO/root.tar.xz /PATH/TO/KICKSTART /PATH/TO/ISO /PATH/TO/NEW-ISO
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When this iso is booted it will execute the kickstart and install the liveimg
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contents to the system without any prompting.
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How it works
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------------
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``mkksiso`` first examines the system to make sure the tools it needs are installed,
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it will work with ``xorrisofs`` or ``mkisofs`` installed. It mounts the source iso,
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and copies the directories that need to be modified to a temporary directory.
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It then modifies the boot configuration files to include the ``inst.ks`` command,
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and checks to see if the original iso supports EFI. If it does it regenerates the
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EFI boot images with the new configuration, and then runs the available iso creation
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tool to add the new files and directories to the new iso. If the architecture is
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``x86_64`` it will also make sure the iso can be booted as an iso or from a USB
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stick (hybridiso).
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The last step is to update the iso checksums so that booting with test enabled
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will pass.
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