#!/bin/sh## $Id: Raid1.in,v 1.5 2002/04/16 13:39:12 lars Exp $# # Raid1#      Description: Manages a software Raid1 device on a shared storage medium.#  Original Author: Eric Z. Ayers (eric.ayers@compgen.com)# Original Release: 25 Oct 2000#          Support: linux-ha-dev@lists.tummy.com#     RAID patches: http://people.redhat.com/mingo/raid-patches/# Word to the Wise: http://lwn.net/2000/0810/a/raid-faq.php3#  Sympathetic Ear: mailto:linux-raid@vger.kernel.org## usage: $0 <raidtab_config_file> <md_dev_name> {start|stop|status}## in /etc/ha.d/haresources, use a line such as:# nodea  10.0.0.170 Raid1::/etc/raidtab.md0::/dev/md0 Filesystem::/dev/md0::/data1::ext2## This script assumes you are running the so-called RAID v.90 patches vs.# the Linux 2.2 kernel (distributed with RedHat 6.2).   I have not used # kernel version 2.4.   ## The "start" arg starts up the raid device# The "stop" arg stops it.  NOTE: all filesystems must be unmounted#  and no processes should be accessing the device.# The "status" arg just prints out whether the device is running or not## # DISCLAIMER: Use at your own risk!##  Besides all of the usual legalese that accompanies free software, #  I will warn you that I do not yet use this kind of setup (software RAID #  over shared storage) in production, and I have reservations about doing so.##  The linux md driver/scsi drivers under Raid 0.90 and kernel version 2.2 #  do not behave well when a drive is in the process of going bad.  #  The kernel slows down, but doesn't completely crash.  This is about the #  worst possible thing that could happen in an un-attended HA type #  environment.  (Once the system is rebooted, the sofware raid stuff works #  like a champ.)  #  My other reservation has to do with the interation of RAID recovery with #  journaling filesystems and other parts of the kernel.  Subscribe to #  linux-raid@vger.kernel.org  for other opinions and possible solutions.##  -EZA 25 Oct 2000 # # SETUP:## You might need to pass the command line parameter: raid=noautodetect # in an HA environment so that the kernel doesn't automatically start# up your raid partitions when you boot the node.  This means that it isn't# going to work to use RAID for the system disks and the shared disks.## 0) partition the disks to use for RAID.  Use normal Linux partition #     types, not the RAID autodetect type for your partitions.# 1) Create /etc/raidtab.md?  on both systems (see example file below)# 2) Initialize your raid partition with #     /sbin/mkraid --configfile /etc/raidtab.md? /dev/md?# 3) Format your filesystem#     mke2fs /dev/md0  # for ext2fs... a journaling filesystem would be nice# 3) Create the mount point on both systems.#     DO NOT add your raid filesystem to /etc/fstab# 4) copy this script (to /etc/rc.d/init.d if you wish) and edit it to#    reflect your desired settings.# 5) Modify the heartbeat 'haresources' setup file# 6) unmount the filesystem and stop the raid device with 'raidstop'# 7) fire up heartbeat!## # EXAMPLE config file /etc/raidtab.md0# This file must exist on both machines!##  raiddev		    /dev/md0#  raid-level		    1#  nr-raid-disks		    2#  chunk-size		    64k#  persistent-superblock	    1#  #nr-spare-disks	    0#    device	    /dev/sda1#    raid-disk     0#    device	    /dev/sdb1#    raid-disk     1#unset LC_ALL; export LC_ALLunset LANGUAGE; export LANGUAGEprefix=@prefix@exec_prefix=@exec_prefix@. @sysconfdir@/ha.d/shellfuncs# Utilities used by this scriptMODPROBE=@MODPROBE@FSCK=@FSCK@FUSER=@FUSER@RAIDSTART=@RAIDSTART@MOUNT=@MOUNT@UMOUNT=@UMOUNT@RAIDSTOP=@RAIDSTOP@check_util () {    if [ ! -x "$1" ] ; then	ha_log "ERROR: setup problem: Couldn't find utility $1"	exit 1    fi}usage() {cat <<-EOT;	usage: $0 <raidtab_config_file> <md_dev_name> {start|stop|status}	<raidtab_config_file> : name of MD configuration file. e.g. /etc/raidtab	<md_dev_name>         : of the form /dev/md?? (the block device to use)	$Id: Raid1.in,v 1.5 2002/04/16 13:39:12 lars Exp $EOT}# Check the arguments passed to this scriptRAIDTAB_CONFIG=$1MDDEV=$2if [ ! -f "$1" ] ; then	ha_log "ERROR: Couldn't open file $1"	usage	exit 1fiif [ ! -b "$MDDEV" ] ; then	ha_log "ERROR: Couldn't find MD device $MDDEV. Expected /dev/md* to exist"	usage	exit 1fi# strip off the /dev/ prefix to get the name of the MD deviceMD=`echo $MDDEV | sed -e 's/\/dev\///'`# Check to make sure the utilites are foundcheck_util $MODPROBEcheck_util $FUSERcheck_util $RAIDSTARTcheck_util $MOUNTcheck_util $UMOUNTcheck_util $RAIDSTOP# Look for the 'start' or 'stop' argumentcase "$3" in## START: Start up the RAID device#start)# See if the md device is already mounted.# NOTE: this will not work right if you have more than 10 md devices!$MOUNT | grep -e "^$MDDEV" >/dev/nullif [ $? -ne 1 ] ; then    ha_log "ERROR: Device $MDDEV is already mounted!"    exit 1;fi# Insert SCSI module$MODPROBE scsi_hostadapterif [ $? -ne 0 ] ; then    ha_log "WARNING: Couldn't insert SCSI module."fi# Insert raid personality module$MODPROBE raid1if [ $? -ne 0 ] ; then    ha_log "ERROR: Couldn't insert RAID1 module"    exit 1fi# Run raidstart to start up the RAID array$RAIDSTART --configfile $RAIDTAB_CONFIG $MDDEVif [ $? -ne 0 ] ; then	ha_log "ERROR: Couldn't start RAID for $MDDEV"	exit 1fi;;## STOP: stop the RAID device#stop)# See if the MD device is onlinegrep -e "^$MD" /proc/mdstat >/dev/nullif [ $? -ne 0 ] ; then        ha_log "WARNING: device $MD is not online according to kernel"	exit 0fi# See if the MD device is mounted# NOTE: this will not work right if you have more than 10 md devices!$MOUNT | grep -e "^$MDDEV" >/dev/nullif [ $? -ne 1 ] ; then	# Kill all processes open on filesystem	$FUSER -mk $MOUNTPOINT	# the return from fuser doesn't tell us much	#if [ $? -ne 0 ] ; then	#	ha_log "ERROR: Couldn't kill processes on $MOUNTPOINT"	#	exit 1;	#fi	# Unmount the filesystem	$UMOUNT $MDDEV	if [ $? -ne 0 ] ; then		ha_log "ERROR: Couldn't unmount filesystem for $MDDEV"		exit 1	fi	$MOUNT | grep -e "^$MDDEV" >/dev/null	if [ $? -ne 1 ] ; then	    ha_log "ERROR: filesystem for $MDDEV still mounted"	    exit 1	fifi# Turn off raid$RAIDSTOP --configfile /etc/raidtab.$MD $MDDEVif [ $? -ne 0 ] ; then	ha_log "ERROR: Couldn't stop RAID for $MDDEV"	exit 1fi;;## STATUS: is the raid device online or offline?#status) # See if the MD device is onlinegrep -e "^$MD" /proc/mdstat >/dev/nullif [ $? -ne 0 ] ; then    echo "stopped"else    echo "running"fi    ;;*)    echo "This script should be run with the third argument 'start', 'stop', or 'status'"    exit 1;;esac# If you got to this point, chances are everything is O.K.exit 0;