I want to preseed an Ubuntu 12.04 installer using a custom partitioning recipe. My disk layout is reasonably complex, and so is the recipe syntax itself. Hand-crafting such a recipe seems tedious and error prone.

Is there a tool to simply create a recipe from an existing disk, including its partitions and LVM configuration?


I have found no such tool and don't want to write one. What I did was to treat the expert recipes as standard text files that I edit online with ACE editor. Before sending the recipe to the preseed file in the mako template, I use this function to convert the text into a form ready for debconf.


This function could be expanded to allow you to put comments in the recipe if it is complex enough to need that.

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You can use Kickstart. An excerpt from https://gist.github.com/ludo/3652811 example:

bootloader --location=mbr
zerombr yes
clearpart --all --initlabel
part /boot --fstype=ext2 --size=64
part swap --size=1024
part / --fstype=ext4 --size=1 --grow
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I am not entirely sure about what you mean with "preseed". If you are talking about a KickStart or unattended install, one good tool for that is anaconda.

I have used it extensively for unattended installation of RedHatLinux. According to Debian Wiki it is supported at Debian also. Being ubuntu a Debian derivative it should be usable.

You control the partitions with command part.

The basic idea behind an unattended install is that you provide a kickstart config file and anaconda does all the work.

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