mirror of
git://sourceware.org/git/lvm2.git
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lvm2create_initrd submitted by Jeff Layton <jtlayton@poochiereds.net>
sourced from http://poochiereds.net/svn/lvm2/
This commit is contained in:
Alasdair Kergon
parent
30bab85be1
commit
8c670f8349
@ -1,5 +1,6 @@
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Version 2.00.17 -
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=============================
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Add lvm2create_initrd script from http://poochiereds.net/svn/lvm2/
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Fix rounding of large diplayed sizes.
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Suppress decimal point when using units of sectors/bytes.
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Additional kernel target checks before pvmove & snapshot creation.
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6
scripts/lvm2create_initrd/Makefile
Normal file
6
scripts/lvm2create_initrd/Makefile
Normal file
@ -0,0 +1,6 @@
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all:
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echo "Nothing to do for make all"
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manpage:
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pod2man --center="create LVM2 initrd" --name='lvm2create_initrd' --section=8 -r 'lvm2create_initrd' ./lvm2create_initrd.pod > lvm2create_initrd.8
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40
scripts/lvm2create_initrd/README
Normal file
40
scripts/lvm2create_initrd/README
Normal file
@ -0,0 +1,40 @@
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http://poochiereds.net/svn/lvm2/
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This is the lvm2create_initrd script written by Miguel Cabeca, with some small
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modifications by myself.
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Here are some other requirements and tips for using it:
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1) this script uses busybox on the initrd image, hence busybox needs to be
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installed when you create your initrd.
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2) Make sure /etc/lvm/lvm.conf is set up correctly before running this. In
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particular, if you're using LVM on RAID, make sure that you have a filter that
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excludes the RAID component devices (this may not be necessary with the latest
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patch by Luca Berra, but it doesn't hurt).
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3) This initrd image does not support modules. If you need to plug in any
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kernel modules during the initrd phase, then you'll need to hand-modify the
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image.
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4) The generated initrd image supports an 'lvm2rescue' mode as well. If you add
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the parameter 'lvmrescue' on the kernel command line, it will run a shell at
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the end of the initrd 'init' script. This can be helpful when trying to fix a
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corrupt root volume or root LVM2 volume group.
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5) No userspace md tools are installed, so if you're using LVM on RAID, then
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you'll probably want to mark your RAID partitions as type 'fd' so that the
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kernel will start them automagically (or hand-modify the image).
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6) I'm not sure if devfs will work with this or not. udev, however does work,
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and is recommended. Because the dm-* devices use dynamically allocated major
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and minor numbers, kernel upgrades and the like can renumber your devices. To
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fix this, you need to run a 'vgscan --mknodes' prior to fscking and mounting
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your rootfs. Doing this with a static /dev creates a problem though -- you
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will be modifying the root filesystem before it has been fsck'ed. udev gets
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around this by mounting a ramdisk over /dev, but you'll probably need to add
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a startup script that creates devices in /dev. The lvm2udev script in this
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directory is an example of such a beast.
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--
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Jeffrey Layton <jtlayton@poochiereds.net>
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476
scripts/lvm2create_initrd/lvm2create_initrd
Normal file
476
scripts/lvm2create_initrd/lvm2create_initrd
Normal file
@ -0,0 +1,476 @@
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#!/bin/bash
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#
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# lvm2create_initrd
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#
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# Miguel Cabeca
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# cabeca (at) ist (dot) utl (dot) pt
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#
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# Inspiration to write this script came from various sources
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#
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# Original LVM lvmcreate_initrd: ftp://ftp.sistina.com/pub/LVM/1.0/
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# Kernel initrd.txt: http://www.kernel.org/
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# EVMS INSTALL.initrd & linuxrc: http://evms.sourceforge.net/
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# Jeffrey Layton's lvm2create_initrd: http://poochiereds.net/svn/lvm2create_initrd/
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# Christophe Saout's initrd & linuxrc: http://www.saout.de/misc/
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#
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# This script was only tested with kernel 2.6 with everything required to boot
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# the root filesystem built-in (not as modules). Ex: SCSI or IDE, RAID, device mapper
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# It does not support devfs as it is deprecated in the 2.6 kernel series
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#
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# It needs lvm2 tools, busybox, pivot_root, MAKEDEV
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#
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# It has been tested on Debian sid (unstable) only
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#
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# Changelog
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# 26/02/2004 Initial release -- Miguel Cabeca
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# 27/02/2004 Removed the BUSYBOXSYMLINKS var. The links are now determined at runtime.
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# some changes in init script to call a shell if something goes wrong. -- Miguel Cabeca
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# 19/04/2004 Several small changes. Pass args to init so single user mode works. Add some
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# PATH entries to /sbin/init shell script so chroot works without /usr mounted. Remove
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# mkdir /initrd so we don't cause problems if root filesystem is corrupted. -- Jeff Layton
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# 15/05/2004 initial support for modules, create lvm.conf from lvm dumpconfig, other cleanups -- Jeff Layton
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#
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# Copyright Miguel Cabeca, Jeffrey Layton, 2004
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# $Id$
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TMPMNT=/tmp/mnt.$$
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DEVRAM=/tmp/initrd.$$
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# set defaults
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BINFILES=${BINFILES:-"/lib/lvm-200/lvm /bin/bash /bin/busybox /sbin/pivot_root"}
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BASICDEVICES=${BASICDEVICES:-"std consoleonly fd"}
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BLOCKDEVICES=${BLOCKDEVICES:-"md hda hdb hdc hdd sda sdb sdc sdd"}
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MAKEDEV=${MAKEDEV:-"debian"}
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# Uncomment this if you want to disable automatic size detection
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#INITRDSIZE=4096
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PATH=/bin:/sbin:/usr/bin:/usr/sbin:$PATH
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usage () {
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echo "Create an initial ramdisk image for LVM2 root filesystem"
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echo "$cmd: [-h] [-v] [-c lvm.conf] [-m modulelist] [-e extrafiles] -r [raiddevs] [-R mdadm.conf] [-M style] [kernel version]"
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echo " -h|--help print this usage message"
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echo " -v|--verbose verbose progress messages"
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echo " -c|--lvmconf path to lvm.conf (/etc/lvm/lvm.conf)"
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echo " -m|--modules modules to copy to initrd image"
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echo " -e|--extra extra files to add to initrd"
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echo " -r|--raid raid devices to start in initrd"
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echo " -R|--raidconf location of mdadm.conf file to include"
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echo " -M|--makedev set MAKEDEV type (debian or redhat)"
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}
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verbose () {
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[ "$VERBOSE" ] && echo "`echo $cmd | tr '[a-z0-9/_]' ' '` -- $1" || true
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}
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cleanup () {
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[ "`mount | grep $DEVRAM`" ] && verbose "unmounting $DEVRAM" && umount $DEVRAM
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[ -f $DEVRAM ] && verbose "removing $DEVRAM" && rm $DEVRAM
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[ -d $TMPMNT ] && verbose "removing $TMPMNT" && rmdir $TMPMNT
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verbose "exit with code $1"
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exit $1
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}
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trap "
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verbose 'Caught interrupt'
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echo 'Bye bye...'
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cleanup 1
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" 1 2 3 15
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create_init () {
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cat << 'INIT' > $TMPMNT/sbin/init
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#!/bin/bash
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# include in the path some dirs from the real root filesystem
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# for chroot, blockdev
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PATH="/sbin:/bin:/usr/sbin:/usr/bin:/lib/lvm-200:/initrd/bin:/initrd/sbin"
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PRE="initrd:"
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do_shell(){
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/bin/echo
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/bin/echo "*** Entering LVM2 rescue shell. Exit shell to continue booting. ***"
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/bin/echo
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/bin/bash
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}
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echo "$PRE Remounting / read/write"
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mount -t ext2 -o remount,rw /dev/ram0 /
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# We need /proc for device mapper
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echo "$PRE Mounting /proc"
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mount -t proc none /proc
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# plug in modules listed in /etc/modules
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if [ -f /etc/modules ]; then
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echo -n "$PRE plugging in kernel modules:"
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cat /etc/modules |
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while read module; do
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echo -n " $module"
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modprobe $module
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done
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echo '.'
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fi
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# start raid devices if raid_autostart file exists
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if [ -f /etc/raid_autostart ]; then
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if [ ! -f /etc/mdadm/mdadm.conf ]; then
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mdoptions='--super-minor=dev'
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fi
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cat /etc/raid_autostart|
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while read dev; do
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echo "Starting RAID device $dev"
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/sbin/mdadm --assemble $dev $mdoptions
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done
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fi
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# Create the /dev/mapper/control device for the ioctl
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# interface using the major and minor numbers that have been allocated
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# dynamically.
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echo -n "$PRE Finding device mapper major and minor numbers "
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MAJOR=$(sed -n 's/^ *\([0-9]\+\) \+misc$/\1/p' /proc/devices)
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MINOR=$(sed -n 's/^ *\([0-9]\+\) \+device-mapper$/\1/p' /proc/misc)
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if test -n "$MAJOR" -a -n "$MINOR" ; then
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mkdir -p -m 755 /dev/mapper
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mknod -m 600 /dev/mapper/control c $MAJOR $MINOR
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fi
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echo "($MAJOR,$MINOR)"
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# Device-Mapper dynamically allocates all device numbers. This means it is possible
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# that the root volume specified to LILO or Grub may have a different number when the
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# initrd runs than when the system was last running. In order to make sure the
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# correct volume is mounted as root, the init script must determine what the
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# desired root volume name is by getting the LVM2 root volume name from the kernel command line. In order for
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# this to work correctly, "lvm2root=/dev/Volume_Group_Name/Root_Volume_Name" needs to be passed
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# to the kernel command line (where Root_Volume_Name is replaced by your actual
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# root volume's name.
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for arg in `cat /proc/cmdline`; do
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echo $arg | grep '^lvm2root=' > /dev/null
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if [ $? -eq 0 ]; then
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rootvol=${arg#lvm2root=}
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break
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fi
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done
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echo "$PRE Activating LVM2 volumes"
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# run a shell if we're passed lvm2rescue on commandline
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grep lvm2rescue /proc/cmdline 1>/dev/null 2>&1
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if [ $? -eq 0 ]; then
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lvm vgchange --ignorelockingfailure -P -a y
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do_shell
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else
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lvm vgchange --ignorelockingfailure -a y
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fi
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echo "$PRE Mounting root filesystem $rootvol ro"
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mkdir /rootvol
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if ! mount -t auto -o ro $rootvol /rootvol; then
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echo "\t*FAILED*";
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do_shell
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fi
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echo "$PRE Umounting /proc"
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umount /proc
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echo "$PRE Changing roots"
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cd /rootvol
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if ! pivot_root . initrd ; then
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echo "\t*FAILED*"
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do_shell
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fi
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echo "$PRE Proceeding with boot..."
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exec chroot . /bin/sh -c "umount /initrd; blockdev --flushbufs /dev/ram0 ; exec /sbin/init $*" < dev/console > dev/console 2>&1
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INIT
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chmod 555 $TMPMNT/sbin/init
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}
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# create lvm.conf file from dumpconfig. Just use filter options
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create_lvmconf () {
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echo 'devices {' > $TMPMNT/etc/lvm/lvm.conf
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lvm dumpconfig | grep 'filter=' >> $TMPMNT/etc/lvm/lvm.conf
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echo '}' >> $TMPMNT/etc/lvm/lvm.conf
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}
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#
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# Main
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#
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cmd=`basename $0`
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VERSION=`uname -r`
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while [ $# -gt 0 ]; do
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case $1 in
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-h|--help) usage; exit 0;;
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-v|--verbose) VERBOSE="y";;
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-c|--lvmconf) LVMCONF=$2; shift;;
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-m|--modules) MODULES=$2; shift;;
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-e|--extra) EXTRAFILES=$2; shift;;
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-r|--raid) RAID=$2; shift;;
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-R|--raidconf) RAIDCONF=$2; shift;;
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-M|--makedev) MAKEDEV=$2; shift;;
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[2-9].[0-9]*.[0-9]*) VERSION=$1;;
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*) echo "$cmd -- invalid option '$1'"; usage; exit 0;;
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esac
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shift
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done
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INITRD=${INITRD:-"/boot/initrd-lvm2-$VERSION.gz"}
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echo "$cmd -- make LVM initial ram disk $INITRD"
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echo ""
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if [ -n "$RAID" ]; then
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BINFILES="$BINFILES /sbin/mdadm"
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RAIDCONF=${RAIDCONF:-"/etc/mdadm/mdadm.conf"}
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if [ -r $RAIDCONF ]; then
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EXTRAFILES="$EXTRAFILES $RAIDCONF"
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else
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echo "$cmd -- WARNING: No $RAIDCONF! Your RAID device minor numbers must match their superblock values!"
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fi
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fi
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# add modprobe if we declared any modules
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if [ -n "$MODULES" ]; then
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BINFILES="$BINFILES /sbin/modprobe /sbin/insmod /sbin/rmmod"
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fi
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for a in $BINFILES $EXTRAFILES; do
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if [ ! -r "$a" ] ; then
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echo "$cmd -- ERROR: you need $a"
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exit 1;
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fi;
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done
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# Figure out which shared libraries we actually need in our initrd
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echo "$cmd -- finding required shared libraries"
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verbose "BINFILES: `echo $BINFILES`"
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LIBFILES=`ldd $BINFILES 2>/dev/null | awk '{if (/=>/) { print $3 }}' | sort -u`
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if [ $? -ne 0 ]; then
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echo "$cmd -- ERROR figuring out needed shared libraries"
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exit 1
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fi
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verbose "Shared libraries needed: `echo $LIBFILES`"
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INITRDFILES="$BINFILES $LIBFILES $MODULES $EXTRAFILES"
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# tack on stuff for modules if we declared any and the files exist
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if [ -n "$MODULES" ]; then
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if [ -f "/etc/modprobe.conf" ]; then
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INITRDFILES="$INITRDFILES /etc/modprobe.conf"
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fi
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if [ -f "/lib/modules/modprobe.conf" ]; then
|
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INITRDFILES="$INITRDFILES /lib/modules/modprobe.conf"
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fi
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fi
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# Calculate the the size of the ramdisk image.
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# Don't forget that inodes take up space too, as does the filesystem metadata.
|
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echo "$cmd -- calculating initrd filesystem parameters"
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if [ -z "$INITRDSIZE" ]; then
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echo "$cmd -- calculating loopback file size"
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verbose "finding size"
|
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INITRDSIZE="`du -Lck $INITRDFILES | tail -1 | cut -f 1`"
|
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verbose "minimum: $INITRDSIZE kB for files + inodes + filesystem metadata"
|
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INITRDSIZE=`expr $INITRDSIZE + 512` # enough for ext2 fs + a bit
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fi
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echo "$cmd -- making loopback file ($INITRDSIZE kB)"
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verbose "using $DEVRAM as a temporary loopback file"
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dd if=/dev/zero of=$DEVRAM count=$INITRDSIZE bs=1024 > /dev/null 2>&1
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if [ $? -ne 0 ]; then
|
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echo "$cmd -- ERROR creating loopback file"
|
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cleanup 1
|
||||
fi
|
||||
|
||||
echo "$cmd -- making ram disk filesystem"
|
||||
verbose "mke2fs -F -m0 -L LVM-$VERSION $DEVRAM $INITRDSIZE"
|
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[ "$VERBOSE" ] && OPT_Q="" || OPT_Q="-q"
|
||||
mke2fs $OPT_Q -F -m0 -L LVM-$VERSION $DEVRAM $INITRDSIZE
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR making ram disk filesystem"
|
||||
echo "$cmd -- ERROR you need to use mke2fs >= 1.14 or increase INITRDSIZE"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
verbose "creating mountpoint $TMPMNT"
|
||||
mkdir $TMPMNT
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR making $TMPMNT"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
echo "$cmd -- mounting ram disk filesystem"
|
||||
verbose "mount -o loop $DEVRAM $TMPMNT"
|
||||
mount -oloop $DEVRAM $TMPMNT
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR mounting $DEVRAM on $TMPMNT"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
verbose "creating basic set of directories in $TMPMNT"
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||||
(cd $TMPMNT; mkdir bin dev etc lib proc sbin var)
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR creating directories in $TMPMNT"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
# Add some /dev files. We have to handle different types of MAKEDEV invocations
|
||||
# here, so this is rather messy.
|
||||
RETCODE=0
|
||||
echo "$cmd -- adding required /dev files"
|
||||
verbose "BASICDEVICES: `echo $BASICDEVICES`"
|
||||
verbose "BLOCKDEVICES: `echo $BLOCKDEVICES`"
|
||||
[ "$VERBOSE" ] && OPT_Q="-v" || OPT_Q=""
|
||||
case "$MAKEDEV" in
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||||
debian)
|
||||
(cd $TMPMNT/dev; /dev/MAKEDEV $OPT_Q $BASICDEVICES $BLOCKDEVICES)
|
||||
RETCODE=$?
|
||||
;;
|
||||
redhat)
|
||||
(cd $TMPMNT/dev; /dev/MAKEDEV $OPT_Q -d $TMPMNT/dev -m 2)
|
||||
RETCODE=$?
|
||||
;;
|
||||
*)
|
||||
echo "$cmd -- ERROR: $MAKEDEV is not a known MAKEDEV style."
|
||||
RETCODE=1
|
||||
;;
|
||||
esac
|
||||
|
||||
|
||||
if [ $RETCODE -ne 0 ]; then
|
||||
echo "$cmd -- ERROR adding /dev files"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
|
||||
# copy necessary files to ram disk
|
||||
echo "$cmd -- copying initrd files to ram disk"
|
||||
[ "$VERBOSE" ] && OPT_Q="-v" || OPT_Q="--quiet"
|
||||
verbose "find \$INITRDFILES | cpio -pdmL $OPT_Q $TMPMNT"
|
||||
find $INITRDFILES | cpio -pdmL $OPT_Q $TMPMNT
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR cpio to ram disk"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
|
||||
echo "$cmd -- creating symlinks to busybox"
|
||||
shopt -s extglob
|
||||
[ "$VERBOSE" ] && OPT_Q="-v" || OPT_Q=""
|
||||
BUSYBOXSYMLINKS=`busybox 2>&1| awk '/^Currently defined functions:$/ {i++;next} i'|tr ',\t\n' ' '`
|
||||
for link in ${BUSYBOXSYMLINKS//@(linuxrc|init|busybox)}; do
|
||||
ln -s $OPT_Q busybox $TMPMNT/bin/$link;
|
||||
done
|
||||
shopt -u extglob
|
||||
|
||||
echo "$cmd -- creating new $TMPMNT/sbin/init"
|
||||
create_init
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR creating init"
|
||||
cleanup
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# copy LVMCONF into place or create a stripped down one from lvm dumpconfig
|
||||
mkdir -p $TMPMNT/etc/lvm
|
||||
if [ -n "$LVMCONF" ]; then
|
||||
echo "$cmd -- copying $LVMCONF to $TMPMNT/etc/lvm/lvm.conf"
|
||||
if [ -f "$LVMCONF" ]; then
|
||||
cp $LVMCONF $TMPMNT/etc/lvm/lvm.conf
|
||||
else
|
||||
echo "$cmd -- ERROR: $LVMCONF does not exist!"
|
||||
cleanup
|
||||
exit 1
|
||||
fi
|
||||
else
|
||||
echo "$cmd -- creating new $TMPMNT/etc/lvm/lvm.conf"
|
||||
create_lvmconf
|
||||
fi
|
||||
|
||||
if [ -n "$RAID" ]; then
|
||||
RAIDLIST="$TMPMNT/etc/raid_autostart"
|
||||
echo "$cmd -- creating $RAIDLIST file."
|
||||
for device in $RAID; do
|
||||
echo $device >> $RAIDLIST
|
||||
done
|
||||
fi
|
||||
|
||||
# create modules.dep and /etc/modules files if needed
|
||||
if [ -n "$MODULES" ]; then
|
||||
echo "$cmd -- creating $MODDIR/modules.dep file and $TMPMNT/etc/modules"
|
||||
depmod -b $TMPMNT $VERSION
|
||||
for module in $MODULES; do
|
||||
basename $module | sed 's/\.k\{0,1\}o$//' >> $TMPMNT/etc/modules
|
||||
done
|
||||
fi
|
||||
|
||||
verbose "removing $TMPMNT/lost+found"
|
||||
rmdir $TMPMNT/lost+found
|
||||
|
||||
echo "$cmd -- ummounting ram disk"
|
||||
umount $DEVRAM
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR umounting $DEVRAM"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
echo "$cmd -- creating compressed initrd $INITRD"
|
||||
verbose "dd if=$DEVRAM bs=1k count=$INITRDSIZE | gzip -9"
|
||||
dd if=$DEVRAM bs=1k count=$INITRDSIZE 2>/dev/null | gzip -9 > $INITRD
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$cmd -- ERROR creating $INITRD"
|
||||
cleanup 1
|
||||
fi
|
||||
|
||||
|
||||
cat << FINALTXT
|
||||
--------------------------------------------------------
|
||||
Your initrd is ready in $INITRD
|
||||
|
||||
Don't forget to set root=/dev/ram0 in kernel parameters
|
||||
Don't forget to set lvm2root=/dev/VG/LV in kernel parameters, where LV is your root volume
|
||||
If you use lilo try adding/modifying an entry similar to this one in lilo.conf:
|
||||
|
||||
image=/boot/vmlinuz-lvm2-$VERSION
|
||||
label="ramdisk_LVM"
|
||||
initrd=/boot/initrd-lvm2-$VERSION.gz
|
||||
append="root=/dev/ram0 lvm2root=/dev/system/root <other parameters>"
|
||||
|
||||
If using grub try adding/modifying an entry similar to this one in menu.lst
|
||||
|
||||
title ramdisk LVM
|
||||
kernel /boot/vmlinuz-lvm2-$VERSION root=/dev/ram0 lvm2root=/dev/system/root <other parameters>
|
||||
initrd /boot/initrd-lvm2-$VERSION.gz
|
||||
|
||||
You can also pass lvm2rescue to the kernel to get a shell
|
||||
--------------------------------------------------------
|
||||
FINALTXT
|
||||
|
||||
cleanup 0
|
||||
|
||||
281
scripts/lvm2create_initrd/lvm2create_initrd.8
Normal file
281
scripts/lvm2create_initrd/lvm2create_initrd.8
Normal file
@ -0,0 +1,281 @@
|
||||
.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.14
|
||||
.\"
|
||||
.\" Standard preamble:
|
||||
.\" ========================================================================
|
||||
.de Sh \" Subsection heading
|
||||
.br
|
||||
.if t .Sp
|
||||
.ne 5
|
||||
.PP
|
||||
\fB\\$1\fR
|
||||
.PP
|
||||
..
|
||||
.de Sp \" Vertical space (when we can't use .PP)
|
||||
.if t .sp .5v
|
||||
.if n .sp
|
||||
..
|
||||
.de Vb \" Begin verbatim text
|
||||
.ft CW
|
||||
.nf
|
||||
.ne \\$1
|
||||
..
|
||||
.de Ve \" End verbatim text
|
||||
.ft R
|
||||
.fi
|
||||
..
|
||||
.\" Set up some character translations and predefined strings. \*(-- will
|
||||
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
|
||||
.\" double quote, and \*(R" will give a right double quote. | will give a
|
||||
.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used to
|
||||
.\" do unbreakable dashes and therefore won't be available. \*(C` and \*(C'
|
||||
.\" expand to `' in nroff, nothing in troff, for use with C<>.
|
||||
.tr \(*W-|\(bv\*(Tr
|
||||
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
|
||||
.ie n \{\
|
||||
. ds -- \(*W-
|
||||
. ds PI pi
|
||||
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
|
||||
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
|
||||
. ds L" ""
|
||||
. ds R" ""
|
||||
. ds C` ""
|
||||
. ds C' ""
|
||||
'br\}
|
||||
.el\{\
|
||||
. ds -- \|\(em\|
|
||||
. ds PI \(*p
|
||||
. ds L" ``
|
||||
. ds R" ''
|
||||
'br\}
|
||||
.\"
|
||||
.\" If the F register is turned on, we'll generate index entries on stderr for
|
||||
.\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index
|
||||
.\" entries marked with X<> in POD. Of course, you'll have to process the
|
||||
.\" output yourself in some meaningful fashion.
|
||||
.if \nF \{\
|
||||
. de IX
|
||||
. tm Index:\\$1\t\\n%\t"\\$2"
|
||||
..
|
||||
. nr % 0
|
||||
. rr F
|
||||
.\}
|
||||
.\"
|
||||
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
|
||||
.\" way too many mistakes in technical documents.
|
||||
.hy 0
|
||||
.if n .na
|
||||
.\"
|
||||
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
|
||||
.\" Fear. Run. Save yourself. No user-serviceable parts.
|
||||
. \" fudge factors for nroff and troff
|
||||
.if n \{\
|
||||
. ds #H 0
|
||||
. ds #V .8m
|
||||
. ds #F .3m
|
||||
. ds #[ \f1
|
||||
. ds #] \fP
|
||||
.\}
|
||||
.if t \{\
|
||||
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
|
||||
. ds #V .6m
|
||||
. ds #F 0
|
||||
. ds #[ \&
|
||||
. ds #] \&
|
||||
.\}
|
||||
. \" simple accents for nroff and troff
|
||||
.if n \{\
|
||||
. ds ' \&
|
||||
. ds ` \&
|
||||
. ds ^ \&
|
||||
. ds , \&
|
||||
. ds ~ ~
|
||||
. ds /
|
||||
.\}
|
||||
.if t \{\
|
||||
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
|
||||
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
|
||||
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
|
||||
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
|
||||
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
|
||||
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
|
||||
.\}
|
||||
. \" troff and (daisy-wheel) nroff accents
|
||||
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
|
||||
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
|
||||
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
|
||||
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
|
||||
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
|
||||
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
|
||||
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
|
||||
.ds ae a\h'-(\w'a'u*4/10)'e
|
||||
.ds Ae A\h'-(\w'A'u*4/10)'E
|
||||
. \" corrections for vroff
|
||||
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
|
||||
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
|
||||
. \" for low resolution devices (crt and lpr)
|
||||
.if \n(.H>23 .if \n(.V>19 \
|
||||
\{\
|
||||
. ds : e
|
||||
. ds 8 ss
|
||||
. ds o a
|
||||
. ds d- d\h'-1'\(ga
|
||||
. ds D- D\h'-1'\(hy
|
||||
. ds th \o'bp'
|
||||
. ds Th \o'LP'
|
||||
. ds ae ae
|
||||
. ds Ae AE
|
||||
.\}
|
||||
.rm #[ #] #H #V #F C
|
||||
.\" ========================================================================
|
||||
.\"
|
||||
.IX Title "lvm2create_initrd 8"
|
||||
.TH lvm2create_initrd 8 "2004-06-05" "lvm2create_initrd" "create LVM2 initrd"
|
||||
.SH "NAME"
|
||||
lvm2create_initrd \- create initrd image for booting to root\e\-on\e\-LVM2
|
||||
.SH "SYNOPSIS"
|
||||
.IX Header "SYNOPSIS"
|
||||
\&\fBlvm2create_initrd\fR [ \fB\-h|\-\-help\fR ] [ \fB\-v|\-\-verbose\fR ] [ \fB\-c|\-\-lvmconf\fR \fI/path/to/lvm.conf\fR ] [ \fB\-m|\-\-modules\fR "\fImodule1 module2 ...\fR" ] [ \fB\-e|\-\-extra\fR "\fIfile1 file2 ...\fR" ] [ \fB\-r|\-\-raid\fR "\fI/dev/md1 /dev/md2 ...\fR" ]
|
||||
[ \fB\-R|\-\-raidconf\fR \fI/path/to/mdadm.conf\fR ] [ \fB\-M|\-\-makedev\fR \fIstyle\fR ]
|
||||
.SH "DESCRIPTION"
|
||||
.IX Header "DESCRIPTION"
|
||||
lvm2create_initrd creates an initial ramdisk (initrd) image suitable for booting to system that has an \s-1LVM2\s0 volume as its root filesystem.
|
||||
.PP
|
||||
To boot to such a setup, you'll
|
||||
either need a bootloader that understands \s-1LVM2\s0 volumes, or you'll need a
|
||||
filesystem on a regular volume to act as a boot partition (typically mounted
|
||||
on /boot).
|
||||
.PP
|
||||
The resulting initrd image is fairly full\-featured. It can harbor and load
|
||||
kernel modules, start \s-1MD\s0 devices, and boot to a shell to perform rescue
|
||||
operations.
|
||||
.Sh "Booting to your initrd Image:"
|
||||
.IX Subsection "Booting to your initrd Image:"
|
||||
The filesystem image created is an ext2fs filesystem, hence your kernel must have
|
||||
ext2fs built into it statically in order to boot to the image.
|
||||
.PP
|
||||
Once you create your initrd image, you must pass the correct options to the kernel when
|
||||
you boot using it. Your kernel command line should look something like this:
|
||||
.PP
|
||||
\&\fBroot=/dev/ram0 lvm2root=/dev/rootvg/root [ lvm2rescue ]\fR
|
||||
.PP
|
||||
of course there may be other options.
|
||||
.IP "\fBroot=/dev/ram0\fR" 4
|
||||
.IX Item "root=/dev/ram0"
|
||||
This option is required. It tells the kernel that the root filesystem should initially
|
||||
be set to the ramdisk (/dev/ram0).
|
||||
.IP "\fBlvm2root=/dev/rootvg/root\fR" 4
|
||||
.IX Item "lvm2root=/dev/rootvg/root"
|
||||
This option is also required. It tells the initrd image which \s-1LVM2\s0 device the root filesystem is located on.
|
||||
.IP "\fBlvm2rescue\fR" 4
|
||||
.IX Item "lvm2rescue"
|
||||
Causes the initrd image to run a shell prior to mounting the root filesystem. This is
|
||||
helpful in disaster situations where your initrd image is accessable, but there is
|
||||
a problem with the root filesystem (corrupted image, incorrect device setup, etc.). This
|
||||
option is (of course) optional.
|
||||
.SH "OPTIONS"
|
||||
.IX Header "OPTIONS"
|
||||
Most of parameters that can be set via command-line options can also be set
|
||||
via environment variables. Options specified on the command-line always take
|
||||
precedence.
|
||||
.IP "\fB\-h|\-\-help\fR" 4
|
||||
.IX Item "-h|--help"
|
||||
Display short help text and exit. If used, other options are ignored.
|
||||
.IP "\fB\-v|\-\-verbose\fR" 4
|
||||
.IX Item "-v|--verbose"
|
||||
Turn on extra verbosity for debugging, etc.
|
||||
.IP "\fB\-c|\-\-lvmconf\fR \fI/path/to/lvm.conf\fR" 4
|
||||
.IX Item "-c|--lvmconf /path/to/lvm.conf"
|
||||
Specify an lvm.conf file to include in the image. This is useful if you have
|
||||
special device filters or other options you wish to use during the initrd
|
||||
stage. If this option is not
|
||||
included, then a lvm.conf file is created that contains only the current
|
||||
device filter from an \fBlvm dumpconfig\fR. This can also be set via the \fB$LVMCONF\fR
|
||||
environment variable.
|
||||
.ie n .IP "\fB\-m|\-\-modules\fR ""\fI/path/to/module1.ko /path/to/module2.ko ...\fR""" 4
|
||||
.el .IP "\fB\-m|\-\-modules\fR ``\fI/path/to/module1.ko /path/to/module2.ko ...\fR''" 4
|
||||
.IX Item "-m|--modules ""/path/to/module1.ko /path/to/module2.ko ..."""
|
||||
Specify modules to include and plug in during the initrd phase. This option
|
||||
takes a quoted, space-separated list of modules. Full pathnames are required.
|
||||
These modules are loaded into the kernel early in the initrd phase of the boot
|
||||
process. The current modprobe.conf file is also copied to the initrd image
|
||||
as well. This can also be specified via the \fB$MODULES\fR environment variable.
|
||||
.ie n .IP "\fB\-e|\-\-extra\fR ""\fI/path/to/file1 /path/to/file2 ...\fR""" 4
|
||||
.el .IP "\fB\-e|\-\-extra\fR ``\fI/path/to/file1 /path/to/file2 ...\fR''" 4
|
||||
.IX Item "-e|--extra ""/path/to/file1 /path/to/file2 ..."""
|
||||
Extra files that should be included in the initrd image. These files will be
|
||||
copied to the same location in the initrd image that they are in the current
|
||||
filesystem. Again full pathnames are required. This can also be specified via
|
||||
the \fB$EXTRAFILES\fR environment variable.
|
||||
.ie n .IP "\fB\-r|\-\-raid\fR ""\fI/dev/md1 /dev/md2...\fR""" 4
|
||||
.el .IP "\fB\-r|\-\-raid\fR ``\fI/dev/md1 /dev/md2...\fR''" 4
|
||||
.IX Item "-r|--raid ""/dev/md1 /dev/md2..."""
|
||||
\&\s-1RAID\s0 devices to be started prior to scanning for \s-1LVM2\s0 volume groups. If this
|
||||
option is used then then \fBmdadm\fR program must be installed. This can also be
|
||||
specified via the \fB$RAID\fR environment variable.
|
||||
.ie n .IP "\fB\-R|\-\-raidconf\fR ""\fI/path/to/mdadm.conf\fR""" 4
|
||||
.el .IP "\fB\-R|\-\-raidconf\fR ``\fI/path/to/mdadm.conf\fR''" 4
|
||||
.IX Item "-R|--raidconf ""/path/to/mdadm.conf"""
|
||||
Location of a mdadm.conf file to include. If this is not specified, then no
|
||||
files are included, and any devices specified with the \fB\-r\fR option above
|
||||
must have minor numbers that match their superblock values. This can also be
|
||||
specified via the \fB$RAIDCONF\fR environment variable.
|
||||
.IP "\fB\-M|\-\-makedev\fR \fIstyle\fR" 4
|
||||
.IX Item "-M|--makedev style"
|
||||
Set \s-1MAKEDEV\s0 invocation style. The script currently supports 2 styles of
|
||||
\&\s-1MAKEDEV\s0 programs \fIdebian\fR and \fIredhat\fR. The default is \fIdebian\fR. Set
|
||||
to \fIredhat\fR if using the RedHat/Fedora binary \s-1MAKEDEV\s0 program. Please send
|
||||
a bug report to maintainer if your distrib doesn't work with any of the
|
||||
current options.
|
||||
.SH "ENVIRONMENT VARIABLES"
|
||||
.IX Header "ENVIRONMENT VARIABLES"
|
||||
Most of the options to this script can be set via environment variables. In
|
||||
situations where both are set, then the command-line options take precedence.
|
||||
.IP "\fB$LVMCONF\fR" 4
|
||||
.IX Item "$LVMCONF"
|
||||
Same as \-c option.
|
||||
.IP "\fB$MODULES\fR" 4
|
||||
.IX Item "$MODULES"
|
||||
Same as \-m option.
|
||||
.IP "\fB$EXTRAFILES\fR" 4
|
||||
.IX Item "$EXTRAFILES"
|
||||
Same as \-e option.
|
||||
.IP "\fB$RAID\fR" 4
|
||||
.IX Item "$RAID"
|
||||
Same as \-r option.
|
||||
.IP "\fB$RAIDCONF\fR" 4
|
||||
.IX Item "$RAIDCONF"
|
||||
Same as \-R option.
|
||||
.IP "\fB$MAKEDEV\fR" 4
|
||||
.IX Item "$MAKEDEV"
|
||||
Same as \-M option.
|
||||
.IP "\fB$BASICDEVICES\fR" 4
|
||||
.IX Item "$BASICDEVICES"
|
||||
Overrides the default value of \f(CW$BASICDEVICES\fR in the script (which is \*(L"std consoleonly fd\*(R"). These values are passed to the \fB\s-1MAKEDEV\s0\fR program to create device
|
||||
entries in the initrd image.
|
||||
.IP "\fB$BLOCKDEVICES\fR" 4
|
||||
.IX Item "$BLOCKDEVICES"
|
||||
Overrides the default value of \f(CW$BLOCKDEVICES\fR in the script (which is \*(L"md hda hdb hdc hdd sda sdb sdc sdd\*(R"). This value is passed to the \fB\s-1MAKEDEV\s0\fR program to
|
||||
create device entries in the initrd image.
|
||||
.IP "\fB$BINFILES\fR" 4
|
||||
.IX Item "$BINFILES"
|
||||
Overrides the default value of \f(CW$BINFILES\fR (which is \*(L"/lib/lvm\-200/lvm /bin/bash /bin/busybox /sbin/pivot_root\*(R"). The difference between using this and adding
|
||||
a file to the \f(CW$EXTRAFILES\fR list above is that libraries that these depend upon are also included. You can still use \f(CW$EXTRAFILES\fR to achieve the same effect, but
|
||||
you must resolve library dependencies youself.
|
||||
.IP "\fB$INITRDSIZE\fR" 4
|
||||
.IX Item "$INITRDSIZE"
|
||||
Force a particular size for your initrd image. The default is to total up the size of
|
||||
the included files and to add 512K as a buffer.
|
||||
.SH "BUGS"
|
||||
.IX Header "BUGS"
|
||||
I don't like having to specify a \-M option to set the \s-1MAKEDEV\s0 style, but I know
|
||||
of no way to reliably detect what type of \s-1MAKEDEV\s0 is being used. We'll probably
|
||||
have to add other \s-1MAKEDEV\s0 styles in the future as this script is tested on
|
||||
other distributions.
|
||||
.SH "AUTHORS"
|
||||
.IX Header "AUTHORS"
|
||||
The script was originally written by Miguel Cabeca, with significant
|
||||
improvements by Jeffrey Layton. Comments, bug reports and patches should be
|
||||
sent to Jeffrey Layton at \fBjtlayton@poochiereds.net\fR.
|
||||
.SH "SEE ALSO"
|
||||
.IX Header "SEE ALSO"
|
||||
\&\fB\s-1MAKEDEV\s0\fR(8), \fBmdadm\fR(8), \fBbusybox\fR(8), \fBlvm.conf\fR(5)
|
||||
187
scripts/lvm2create_initrd/lvm2create_initrd.pod
Normal file
187
scripts/lvm2create_initrd/lvm2create_initrd.pod
Normal file
@ -0,0 +1,187 @@
|
||||
=head1 NAME
|
||||
|
||||
lvm2create_initrd - create initrd image for booting to root\-on\-LVM2
|
||||
|
||||
=head1 SYNOPSIS
|
||||
|
||||
B<lvm2create_initrd> [ B<-h|--help> ] [ B<-v|--verbose> ] [ B<-c|--lvmconf> I</path/to/lvm.conf> ] [ B<-m|--modules> "I<module1 module2 ...>" ] [ B<-e|--extra> "I<file1 file2 ...>" ] [ B<-r|--raid> "I</dev/md1 /dev/md2 ...>" ]
|
||||
[ B<-R|--raidconf> I</path/to/mdadm.conf> ] [ B<-M|--makedev> I<style> ]
|
||||
|
||||
=head1 DESCRIPTION
|
||||
|
||||
lvm2create_initrd creates an initial ramdisk (initrd) image suitable for booting to system that has an LVM2 volume as its root filesystem.
|
||||
|
||||
To boot to such a setup, you'll
|
||||
either need a bootloader that understands LVM2 volumes, or you'll need a
|
||||
filesystem on a regular volume to act as a boot partition (typically mounted
|
||||
on /boot).
|
||||
|
||||
The resulting initrd image is fairly full-featured. It can harbor and load
|
||||
kernel modules, start MD devices, and boot to a shell to perform rescue
|
||||
operations.
|
||||
|
||||
=head2 Booting to your initrd Image:
|
||||
|
||||
The filesystem image created is an ext2fs filesystem, hence your kernel must have
|
||||
ext2fs built into it statically in order to boot to the image.
|
||||
|
||||
Once you create your initrd image, you must pass the correct options to the kernel when
|
||||
you boot using it. Your kernel command line should look something like this:
|
||||
|
||||
B<root=/dev/ram0 lvm2root=/dev/rootvg/root [ lvm2rescue ]>
|
||||
|
||||
of course there may be other options.
|
||||
|
||||
=over
|
||||
|
||||
=item B<root=/dev/ram0>
|
||||
|
||||
This option is required. It tells the kernel that the root filesystem should initially
|
||||
be set to the ramdisk (/dev/ram0).
|
||||
|
||||
=item B<lvm2root=/dev/rootvg/root>
|
||||
|
||||
This option is also required. It tells the initrd image which LVM2 device the root filesystem is located on.
|
||||
|
||||
=item B<lvm2rescue>
|
||||
|
||||
Causes the initrd image to run a shell prior to mounting the root filesystem. This is
|
||||
helpful in disaster situations where your initrd image is accessable, but there is
|
||||
a problem with the root filesystem (corrupted image, incorrect device setup, etc.). This
|
||||
option is (of course) optional.
|
||||
|
||||
=back
|
||||
|
||||
=head1 OPTIONS
|
||||
|
||||
Most of parameters that can be set via command-line options can also be set
|
||||
via environment variables. Options specified on the command-line always take
|
||||
precedence.
|
||||
|
||||
=over
|
||||
|
||||
=item B<-h|--help>
|
||||
|
||||
Display short help text and exit. If used, other options are ignored.
|
||||
|
||||
=item B<-v|--verbose>
|
||||
|
||||
Turn on extra verbosity for debugging, etc.
|
||||
|
||||
=item B<-c|--lvmconf> I</path/to/lvm.conf>
|
||||
|
||||
Specify an lvm.conf file to include in the image. This is useful if you have
|
||||
special device filters or other options you wish to use during the initrd
|
||||
stage. If this option is not
|
||||
included, then a lvm.conf file is created that contains only the current
|
||||
device filter from an B<lvm dumpconfig>. This can also be set via the B<$LVMCONF>
|
||||
environment variable.
|
||||
|
||||
=item B<-m|--modules> "I</path/to/module1.ko /path/to/module2.ko ...>"
|
||||
|
||||
Specify modules to include and plug in during the initrd phase. This option
|
||||
takes a quoted, space-separated list of modules. Full pathnames are required.
|
||||
These modules are loaded into the kernel early in the initrd phase of the boot
|
||||
process. The current modprobe.conf file is also copied to the initrd image
|
||||
as well. This can also be specified via the B<$MODULES> environment variable.
|
||||
|
||||
=item B<-e|--extra> "I</path/to/file1 /path/to/file2 ...>"
|
||||
|
||||
Extra files that should be included in the initrd image. These files will be
|
||||
copied to the same location in the initrd image that they are in the current
|
||||
filesystem. Again full pathnames are required. This can also be specified via
|
||||
the B<$EXTRAFILES> environment variable.
|
||||
|
||||
=item B<-r|--raid> "I</dev/md1 /dev/md2...>"
|
||||
|
||||
RAID devices to be started prior to scanning for LVM2 volume groups. If this
|
||||
option is used then then B<mdadm> program must be installed. This can also be
|
||||
specified via the B<$RAID> environment variable.
|
||||
|
||||
=item B<-R|--raidconf> "I</path/to/mdadm.conf>"
|
||||
|
||||
Location of a mdadm.conf file to include. If this is not specified, then no
|
||||
files are included, and any devices specified with the B<-r> option above
|
||||
must have minor numbers that match their superblock values. This can also be
|
||||
specified via the B<$RAIDCONF> environment variable.
|
||||
|
||||
=item B<-M|--makedev> I<style>
|
||||
|
||||
Set MAKEDEV invocation style. The script currently supports 2 styles of
|
||||
MAKEDEV programs I<debian> and I<redhat>. The default is I<debian>. Set
|
||||
to I<redhat> if using the RedHat/Fedora binary MAKEDEV program. Please send
|
||||
a bug report to maintainer if your distrib doesn't work with any of the
|
||||
current options.
|
||||
|
||||
=back
|
||||
|
||||
=head1 ENVIRONMENT VARIABLES
|
||||
|
||||
Most of the options to this script can be set via environment variables. In
|
||||
situations where both are set, then the command-line options take precedence.
|
||||
|
||||
=over
|
||||
|
||||
=item B<$LVMCONF>
|
||||
|
||||
Same as -c option.
|
||||
|
||||
=item B<$MODULES>
|
||||
|
||||
Same as -m option.
|
||||
|
||||
=item B<$EXTRAFILES>
|
||||
|
||||
Same as -e option.
|
||||
|
||||
=item B<$RAID>
|
||||
|
||||
Same as -r option.
|
||||
|
||||
=item B<$RAIDCONF>
|
||||
|
||||
Same as -R option.
|
||||
|
||||
=item B<$MAKEDEV>
|
||||
|
||||
Same as -M option.
|
||||
|
||||
=item B<$BASICDEVICES>
|
||||
|
||||
Overrides the default value of $BASICDEVICES in the script (which is "std consoleonly fd"). These values are passed to the B<MAKEDEV> program to create device
|
||||
entries in the initrd image.
|
||||
|
||||
=item B<$BLOCKDEVICES>
|
||||
|
||||
Overrides the default value of $BLOCKDEVICES in the script (which is "md hda hdb hdc hdd sda sdb sdc sdd"). This value is passed to the B<MAKEDEV> program to
|
||||
create device entries in the initrd image.
|
||||
|
||||
=item B<$BINFILES>
|
||||
|
||||
Overrides the default value of $BINFILES (which is "/lib/lvm-200/lvm /bin/bash /bin/busybox /sbin/pivot_root"). The difference between using this and adding
|
||||
a file to the $EXTRAFILES list above is that libraries that these depend upon are also included. You can still use $EXTRAFILES to achieve the same effect, but
|
||||
you must resolve library dependencies youself.
|
||||
|
||||
=item B<$INITRDSIZE>
|
||||
|
||||
Force a particular size for your initrd image. The default is to total up the size of
|
||||
the included files and to add 512K as a buffer.
|
||||
|
||||
=back
|
||||
|
||||
=head1 BUGS
|
||||
|
||||
I don't like having to specify a -M option to set the MAKEDEV style, but I know
|
||||
of no way to reliably detect what type of MAKEDEV is being used. We'll probably
|
||||
have to add other MAKEDEV styles in the future as this script is tested on
|
||||
other distributions.
|
||||
|
||||
=head1 AUTHORS
|
||||
|
||||
The script was originally written by Miguel Cabeca, with significant
|
||||
improvements by Jeffrey Layton. Comments, bug reports and patches should be
|
||||
sent to Jeffrey Layton at S<B<jtlayton@poochiereds.net>>.
|
||||
|
||||
=head1 SEE ALSO
|
||||
|
||||
B<MAKEDEV>(8), B<mdadm>(8), B<busybox>(8), B<lvm.conf>(5)
|
||||
33
scripts/lvm2create_initrd/lvm2udev
Normal file
33
scripts/lvm2create_initrd/lvm2udev
Normal file
@ -0,0 +1,33 @@
|
||||
#!/bin/sh
|
||||
|
||||
# $Id$
|
||||
|
||||
# simple startup script to create lvm2 devices if /dev is a mountpoint, there
|
||||
# are active dm- devices, and an executable /sbin/vgscan.
|
||||
|
||||
# this script is licensed under GPLv2.
|
||||
# See http://www.gnu.org/licenses/gpl.html
|
||||
|
||||
case $1 in
|
||||
start)
|
||||
# is /dev a mountpoint?
|
||||
mountpoint -q /dev
|
||||
DEVMNTPOINT=$?
|
||||
|
||||
# check to see if there are active dm entries under /sys
|
||||
ls /sys/block/dm-*/dev 1>/dev/null 2>&1
|
||||
ACTIVEDMDEVS=$?
|
||||
|
||||
# mknodes if conditions are right
|
||||
if [ $DEVMNTPOINT -eq 0 -a $ACTIVEDMDEVS -eq 0 -a -x /sbin/vgscan ]; then
|
||||
/sbin/vgscan --mknodes --ignorelockingfailure
|
||||
fi
|
||||
;;
|
||||
stop)
|
||||
exit 0
|
||||
;;
|
||||
*)
|
||||
echo "usage:"
|
||||
echo " $0 start|stop"
|
||||
;;
|
||||
esac
|
||||
Loading…
Reference in New Issue
Block a user