|
|
|
|
dracut
|
|
|
|
|
====
|
|
|
|
|
|
|
|
|
|
dracut is an event driven initramfs infrastructure.
|
|
|
|
|
|
|
|
|
|
[](.github/CODE_OF_CONDUCT.md)
|
|
|
|
|
[](https://github.com/dracutdevs/dracut/actions?query=workflow%3AFedora-32)
|
|
|
|
|
[](https://github.com/dracutdevs/dracut/actions?query=workflow%3AFedora-33)
|
|
|
|
|
[](https://github.com/dracutdevs/dracut/actions?query=workflow%3AFedora-latest)
|
|
|
|
|
|
|
|
|
|
dracut (the tool) is used to create an initramfs image by copying tools
|
|
|
|
|
and files from an installed system and combining it with the
|
|
|
|
|
dracut framework, usually found in /usr/lib/dracut/modules.d.
|
|
|
|
|
|
|
|
|
|
Unlike other implementations, dracut hard-codes as little
|
|
|
|
|
as possible into the initramfs. The initramfs has
|
|
|
|
|
(basically) one purpose in life -- getting the rootfs mounted so that
|
|
|
|
|
we can transition to the real rootfs. This is all driven off of
|
|
|
|
|
device availability. Therefore, instead of scripts hard-coded to do
|
|
|
|
|
various things, we depend on udev to create device nodes for us and
|
|
|
|
|
then when we have the rootfs's device node, we mount and carry on.
|
|
|
|
|
This helps to keep the time required in the initramfs as little as
|
|
|
|
|
possible so that things like a 5 second boot aren't made impossible as
|
|
|
|
|
a result of the very existence of an initramfs.
|
|
|
|
|
|
|
|
|
|
Most of the initramfs generation functionality in dracut is provided by a bunch
|
|
|
|
|
of generator modules that are sourced by the main dracut script to install
|
|
|
|
|
specific functionality into the initramfs. They live in the modules.d
|
|
|
|
|
subdirectory, and use functionality provided by dracut-functions to do their
|
|
|
|
|
work.
|
|
|
|
|
|
|
|
|
|
Currently dracut lives on github.com and kernel.org.
|
|
|
|
|
|
|
|
|
|
The tarballs can be found here:
|
|
|
|
|
http://www.kernel.org/pub/linux/utils/boot/dracut/
|
|
|
|
|
ftp://ftp.kernel.org/pub/linux/utils/boot/dracut/
|
|
|
|
|
|
|
|
|
|
Git:
|
|
|
|
|
https://github.com/dracutdevs/dracut.git
|
|
|
|
|
http://git.kernel.org/?p=boot/dracut/dracut.git
|
|
|
|
|
|
|
|
|
|
Project Documentation:
|
|
|
|
|
http://www.kernel.org/pub/linux/utils/boot/dracut/dracut.html
|
|
|
|
|
|
|
|
|
|
Project Wiki:
|
|
|
|
|
http://dracut.wiki.kernel.org
|
|
|
|
|
|
|
|
|
|
See the github issue tracker for things which still need to be done and HACKING.md
|
|
|
|
|
for some instructions on how to get started. There is also a mailing list
|
|
|
|
|
that is being used for the discussion -- initramfs@vger.kernel.org.
|
|
|
|
|
It is a typical vger list, send mail to majordomo@vger.kernel.org with body
|
|
|
|
|
of 'subscribe initramfs email@host.com'
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Licensed under the GPLv2
|
