No automatic assembly is done anymore by default. You will have to
specify exactly what devices to assemble
("rd.md.uuid=" "rd.luks.uuid" ...)
or use "rd.auto=1" or "rd.auto" on the kernel command line.
For big servers with thousands of disks we don't want to assemble
everything by default (error prone, slow).
Some distros, including debian unstable with 2.6.30, still shop
style ide drivers and/or have important filesystems like ext3 as
modules.
This patch ensures that all test cases work on these configurations
by including the necessary modules and adding a simple udev rule
file that provides /dev/sd* symlinks for the case where old style
ide drivers are still in use.
Copy /etc/mdadm.conf to initramfs (even for non-hostonly) if
mdadmconf="yes" is set in dracut.conf or --mdadmconf is specified on the
dracut command line.
This was done, because there seems _no_ sane way to autoassemble md raid
arrays.
also moved rd_NO_MD to an udev ENV
init now has the following points to inject scripts:
/cmdline/*.sh
scripts for command line parsing
/pre-udev/*.sh
scripts to run before udev is started
/pre-trigger/*.sh
scripts to run before the main udev trigger is pulled
/initqueue/*.sh
runs in parallel to the udev trigger
Udev events can add scripts here with /sbin/initqueue.
If /sbin/initqueue is called with the "--onetime" option, the script
will be removed after it was run.
If /initqueue/work is created and udev >= 143 then this loop can
process the jobs in parallel to the udevtrigger.
If the udev queue is empty and no root device is found or no root
filesystem was mounted, the user will be dropped to a shell after
a timeout.
Scripts can remove themselves from the initqueue by "rm $job".
/pre-mount/*.sh
scripts to run before the root filesystem is mounted
NFS is an exception, because it has no device node to be created
and mounts in the udev events
/mount/*.sh
scripts to mount the root filesystem
NFS is an exception, because it has no device node to be created
and mounts in the udev events
If the udev queue is empty and no root device is found or no root
filesystem was mounted, the user will be dropped to a shell after
a timeout.
/pre-pivot/*.sh
scripts to run before the real init is executed and the initramfs
disappears
All processes started before should be killed here.
The behaviour of the dmraid module demonstrates how to use the new
mechanism. If it detects a device which is part of a raidmember from a
udev rule, it installs a job to scan for dmraid devices, if the udev
queue is empty. After a scan, it removes itsself from the queue.
We no longer require any user intervention when testing dracut on
a local block device in qemu, assuming everything passes. If things fail,
we still might need to manually kill things.
First, add a check script to 99base to ensure that it will load its
prerequisites.
Second, disable the udev magic dracut normally uses when generating
test images -- it was causing random failures when creating the test
root filesystem, presumably due to race conditions between the
rootfs creation scripts and udev.
Third, consolidate the rootfs creation scripts into one script.
There is no point loading every driver available when we are not testing
network functionality and qemu does not even support the stuff we were
loading. It just wastes time and space.
If we install copy-root as a mount hook, it will be run after the root fs
is mounted and it will make hte proc directory, allowing root filesystem
creation to finish without error.
Harald Hoyer