raid1.in

linux集群服务器软件代码包

#!/bin/sh
#
# $Id: Raid1.in,v 1.1 2004/12/20 16:19:37 sunjd Exp $
# 
# Raid1
#      Description: Manages a software Raid1 device on a shared storage medium.
#  Original Author: Eric Z. Ayers ([e-mail])
# Original Release: 25 Oct 2000
#          Support: [e-mail]
#     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:[e-mail]
#
# usage: $0 {start|stop|status|monitor|meta-data}
#
#	  OCF parameters are as below:
#		OCF_RESKEY_raidconf
#                  (name of MD configuration file. e.g. /etc/raidtab)
#		OCF_RESKEY_raiddev
#                  (of the form /dev/md?? the block device to use)   
#
# 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 
#  [e-mail]  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
#

#######################################################################
# Initialization:

. @hb_libdir@/ocf-shellfuncs

#######################################################################
prefix=@prefix@
exec_prefix=@exec_prefix@

# Utilities used by this script
MODPROBE=@MODPROBE@
FSCK=@FSCK@
FUSER=@FUSER@
RAIDSTART=@RAIDSTART@
MOUNT=@MOUNT@
UMOUNT=@UMOUNT@
RAIDSTOP=@RAIDSTOP@

check_util () {
    if [ ! -x "$1" ] ; then
	ocf_log "err" "setup problem: Couldn't find utility $1"
	exit 1
    fi
}

usage() {
cat <<-EOT;
	usage: $0 {start|stop|status|monitor|meta-data}
	$Id: Raid1.in,v 1.1 2004/12/20 16:19:37 sunjd Exp $
EOT
}

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="RAID1" version="0.9">
<version>1.0</version>

<longdesc lang="en">
Resource script for RAID1. It manages a software Raid1 device on a shared 
storage medium. 
</longdesc>
<shortdesc lang="en">RAID1 resource agent</shortdesc>

<parameters>
<parameter name="raidconf" unique="0">
<longdesc lang="en">
The name of RAID configuration file. e.g. /etc/raidtab.
</longdesc>
<shortdesc lang="en">RAID tab config file</shortdesc>
<content type="string" default="" />
</parameter>

<parameter name="raiddev" unique="0">
<longdesc lang="en">
The block device to use.
</longdesc>
<shortdesc lang="en">block device</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>

<actions>
<action name="start" timeout="10" />
<action name="stop" timeout="10" />
<action name="status" depth="0" timeout="10" interval="10" start-delay="10" />
<action name="monitor" depth="0" timeout="10" interval="10" start-delay="10" />
<action name="meta-data" timeout="5" />
</actions>
</resource-agent>
END
}

#
# START: Start up the RAID device
#
raid1_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/null
	if [ $? -ne 1 ] ; then
	    ocf_log "err" "Device $MDDEV is already mounted!"
	    return 1;
	fi
	
	# Insert SCSI module
	$MODPROBE scsi_hostadapter
	if [ $? -ne 0 ] ; then
	    ocf_log "warn" "Couldn't insert SCSI module."
	fi

	# Insert raid personality module
	$MODPROBE raid1
	if [ $? -ne 0 ] ; then
	    ocf_log "err" "Couldn't insert RAID1 module"
	    return 1
	fi

	# Run raidstart to start up the RAID array
	$RAIDSTART --configfile $RAIDTAB_CONFIG $MDDEV
	if [ $? -ne 0 ] ; then
		ocf_log "err" "Couldn't start RAID for $MDDEV"
		return 1
	fi

	return 0
}

#
# STOP: stop the RAID device
#
raid1_stop() {
	# See if the MD device is online
	grep -e "^$MD" /proc/mdstat >/dev/null
	if [ $? -ne 0 ] ; then
	        ocf_log "warn" "device $MD is not online according to kernel"
		return 0
	fi

	# 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/null
	if [ $? -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
		#	ocf_log "err" "Couldn't kill processes on $MOUNTPOINT"
		#	return 1;
		#fi

		# Unmount the filesystem
		$UMOUNT $MDDEV
		if [ $? -ne 0 ] ; then
			ocf_log "err" "Couldn't unmount filesystem for $MDDEV"
			return 1
		fi

		$MOUNT | grep -e "^$MDDEV" >/dev/null
		if [ $? -ne 1 ] ; then
		    ocf_log "err" "filesystem for $MDDEV still mounted"
		    return 1
		fi
	fi

	# Turn off raid
	$RAIDSTOP --configfile /etc/raidtab.$MD $MDDEV
	if [ $? -ne 0 ] ; then
		ocf_log "err" "Couldn't stop RAID for $MDDEV"
		return 1
	fi

	return 0
}

#
# STATUS: is the raid device online or offline?
#
raid1_status() { 

	# See if the MD device is online
	grep -e "^$MD" /proc/mdstat >/dev/null
	if [ $? -ne 0 ] ; then
	    echo "stopped"
	else
	    echo "running"
	fi

	return 0
}    


if
  ( [ $# -eq 0 ] || [ $# -gt 1 ] )
then
  usage
  exit 1
fi

#
# Check the necessary enviroment virable's setting 
# 
RAIDTAB_CONFIG=$OCF_RESKEY_raidconf
MDDEV=$OCF_RESKEY_raiddev

if [ ! -f "$RAIDTAB_CONFIG" ] ; then
	ocf_log "err" "Couldn't open file $RAIDTAB_CONFIG"
	usage
	exit 1
fi

if [ ! -b "$MDDEV" ] ; then
	ocf_log "err" "Couldn't find MD device $MDDEV. Expected /dev/md* to exist"
	usage
	exit 1
fi

# strip off the /dev/ prefix to get the name of the MD device
MD=`echo $MDDEV | sed -e 's/\/dev\///'`

# Check to make sure the utilites are found
check_util $MODPROBE
check_util $FUSER
check_util $RAIDSTART
check_util $MOUNT
check_util $UMOUNT
check_util $RAIDSTOP


# Look for how we are called 
case "$1" in
  meta-data)
	meta_data
	exit $OCF_SUCCESS
	;;
  start)
	raid1_start
	;;
  stop)
	raid1_stop
	;;
  status) 
	raid1_status
	;;

  usage) 
	usage
	exit $OCF_SUCCESS
	;;
  *)
	usage
	exit $OCF_ERR_UNIMPLEMENTED 
	;;
esac

exit $?