[Mageia-dev] RFC: Drop mkinitrd completely in favour of dracut.

Sat Dec 3 10:21:23 CET 2011

On Sat, 03 Dec 2011 01:05:31 -0500, Thomas Backlund <tmb at mageia.org> wrote:
+
+Fyi. On one of my cauldron installs, I have /usr in a lvm
+logical volume.  In order to get this to be bootable, I
+modified /etc/dracut.conf to have
+add_drivers+="dm_mod dm_crypt"
+and
+install_items+=(/bin/grep /lib/libpcre.so.0.0.1 /lib/libpcre.so.0 /lib/libdevmapper-event.so.1.02 /lib/libdevmapper.so.1.02 /lib/libreadline.so.6 /lib/libncurses.so.5 /sbin/lvm /lib/modules/3.1.4-server-1.mga2/kernel/drivers/md/dm-crypt.ko.gz /lib/modules/3.1.4-server-1.mga2/kernel/drivers/md/dm-mod.ko.gz /sbin/dmsetup /sbin/lsmod )
+
+I modified /usr/share/dracut/modules.d/98usrmount/mount-usr.sh to have ...
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+type info >/dev/null 2>&1 || . /lib/dracut-lib.sh
+type fsck_single >/dev/null 2>&1 || . /lib/fs-lib.sh
+
+mount_usr()
+{
+     local _dev _mp _fs _opts _rest _fs_found _ret _mount_point
+     if ! __fgrep "device-mapper" /proc/devices >/dev/null 2>&1 ; then
+        modprobe dm-mod >/dev/null 2>&1
+     fi
+     /sbin/lvm vgchange -a y --sysinit
+fsck_mount()
+(
+     # check, if we have to mount the filesystem
+     _fs_found=""
+     while read _dev _mp _fs _opts _rest; do
+         if [ "$_mp" = "/$_mount_point" ]; then
+             echo "$_dev $NEWROOT/$_mp $_fs ${_opts} $_rest"
+             _fs_found="1"
+             break
+         fi
+     done < "$NEWROOT/etc/fstab" >> /etc/fstab
+     if [ "x$_fs_found" != "x" ]; then
+         # we have to mount it
+         fsck_single "$_dev" "$_fs"
+         _ret=$?
+         echo $_ret >/run/initramfs/$_mount_point-fsck
+         if [ $_ret -ne 255 ]; then
+             info "Mounting /$_mount_point"
+             mount "$NEWROOT/$_mount_point" 2>&1 | vinfo
+         fi
+     fi
+)
+     _mount_point="usr"; fsck_mount
+     _mount_point="var"; fsck_mount
+     _mount_point="var/mnt"; fsck_mount
+     _mount_point="opt"; fsck_mount
+     _mount_point="tmp"; fsck_mount
+     _mount_point="home"; fsck_mount
+}
+
+mount_usr
+
+I initially only had the /usr being mounted, but found that when it
+got around to trying to mount the next lv, it would report that the
+mount timed out due to a dependency failure, but with no indication
+of why.  I ended up modifying the script to mount all of my lvm
+partitions, in the initramfs, to get it to work.
+
+Regards, Dave Hodgins
+
+