openstack/diskimage-builder
Code Issues Proposed changes
d9bcde8a4d
diskimage-builder/elements/dracut-ramdisk
History
Ben Nemec 6377c723aa Allow elements to add drivers to dracut 
It is reasonable that elements may need to include additional
kernel modules in a dracut ramdisk.  This is done with the
--add-drivers option to dracut, but previously the value passed
was hard-coded.

This change allows an element to put a file containing its desired
drivers in a dracut-drivers.d directory, and the list there will
be added to the list of drivers added.  This functions in
essentially the same way as the binary-deps.d directory that
already exists for including additional executables in a ramdisk.

Change-Id: Ie892b908d36c175a469f7cde7dd803ad4b1942b6
2015-03-18 11:40:20 -05:00
..
binary-deps.d Remove duplicate binary-deps from dracut-ramdisk 2014-11-14 12:43:49 -06:00
dracut-drivers.d Allow elements to add drivers to dracut 2015-03-18 11:40:20 -05:00
environment.d Enable dracut deploy ramdisks 2014-10-17 21:44:09 -05:00
extra-data.d/scripts/module Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
install.d Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
post-install.d Allow elements to add drivers to dracut 2015-03-18 11:40:20 -05:00
element-deps Enable dracut deploy ramdisks 2014-10-17 21:44:09 -05:00
pkg-map Enable dracut deploy ramdisks 2014-10-17 21:44:09 -05:00
README.rst Allow elements to add drivers to dracut 2015-03-18 11:40:20 -05:00
source-repository-dracut Enable dracut deploy ramdisks 2014-10-17 21:44:09 -05:00

README.rst

dracut-ramdisk

Build Dracut-based ramdisks

This is an alternative to the ramdisk element that uses Dracut to provide the base system functionality instead of Busybox.

For elements that need additional drivers in the ramdisk image, a dracut-drivers.d feature is included that works in a similar fashion to the binary-deps.d feature. The element needing to add drivers should create a dracut-drivers.d directory and populate it with a single file listing all of the kernel modules it needs added to the ramdisk. Comments are not supported in this file. Note that these modules must be installed in the chroot first.

By default, the virtio, virtio_net, and virtio_blk modules are included so that ramdisks are able to function properly in a virtualized environment.