Usage: ./dracut-catimages [OPTION]... <initramfs> <base image>
[<image>...]
Creates initial ramdisk image by concatenating several images from the
command
line and /boot/dracut/
-f, --force Overwrite existing initramfs file.
-i, --imagedir Directory with additional images to add
(default: /boot/dracut/)
-o, --overlaydir Overlay directory, which contains files that
will be used to create an additional image
--nooverlay Do not use the overlay directory
--noimagedir Do not use the additional image directory
-h, --help This message
--debug Output debug information of the build process
-v, --verbose Verbose output during the build process
--kernel-only
only install kernel drivers and firmware files
--no-kernel
do not install kernel drivers and firmware files
All kernel module related install commands moved from "install"
to "installkernel".
For "--kernel-only" all installkernel scripts of the specified
modules are used, regardless of any checks, so that all modules
which might be needed by any dracut generic image are in.
The basic idea is to create two images. One image with the kernel
modules and one without. So if the kernel changes, you only have
to replace one image.
Grub and the kernel can handle multiple images, so grub entry can
look like this:
title Fedora (2.6.29.5-191.fc11.i586)
root (hd0,0)
kernel /vmlinuz-2.6.29.5-191.fc11.i586 ro rhgb quiet
initrd /initrd-20090722.img
initrd /initrd-kernel-2.6.29.5-191.fc11.i586.img
initrd /initrd-config.img
initrd-20090722.img
the image provided by the initrd rpm
one old backup version is kept like with the kernel
initrd-kernel-2.6.29.5-191.fc11.i586.img
the image provided by the kernel rpm
initrd-config.img
optional image with local configuration files
"make gitrpm" creates an rpm from the last git checkin
"make rpm" creates an rpm for the version tagged with $VERSION
"make dist" creates a tarball for the version tagged with $VERSION
If we purport to test booting to an md raid, we may as well test it.
We do not need the plymouth module and the normal crypt module to include
duplicate functionality.
The switch_root shell script did not work with bash-4.0-2, because
"exec" gets the real path of the executable which is then
"/sysroot/lib/ld-linux.so.2" instread of "./lib/ld-linux.so.2".
Also the required chroot binary might live in /usr/bin, which can
be mounted later.
Here is the switch_root code from nash, which can be stripped down
further, but which works.
>From f1b1e4f8694104f007e4483c36b0bf40a5760167 Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Date: Wed, 4 Mar 2009 13:41:07 +0100
Subject: [PATCH] replace switch_root shell script with binary
The switch_root shell script did not work with bash-4.0-2, because
"exec" gets the real path of the executable which is then
"/sysroot/lib/ld-linux.so.2" instead of "./lib/ld-linux.so.2".
Also the required chroot binary might live in /usr/bin, which can
be mounted later.
Here is the switch_root code from nash, which can be stripped down
further, but which works.
rules, hooks and modules are installed in $(DESTDIR)/usr/libexec/dracut/
instead of their corresponding sub-directories.
This patch fixes this.
--
Makefile | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
Modules are now responsible for loading their hooks into the initrd.
This should be all the structure we need to make it easy for things
to integrate with dracut -- now to document and test it all.
We can use sh -c to accomplish the same goal
Also move cat back on to the list of debugging tools -- all the files we were
using it on in the initrd can use read to accomplish the same goal.
Any script placed in /pre-udev will be sourced just before udev starts
device scanning and loading.
Any script placed in /pre-mount will be sourced just before we try to
mount a root filesystem.
Any script placed in /pre-pivot will be sourced just before we switch to the
new root filesystem.
These hooks should be the minimum needed to add back plymouth and deal with
more advanced filesysem mounting needs (multipath, iscsi, nfs, nbd, etc.)
Harald Hoyer