heartbeat.in

linux集群服务器软件代码包

#!/bin/sh
#
#	$Id: heartbeat.in,v 1.36 2004/05/17 15:12:08 lars Exp $
#
# heartbeat     Start high-availability services
#
# Author:       Alan Robertson	<[e-mail]>
#
#		This script works correctly under SuSE, Debian,
#		Conectiva, Red Hat and a few others.  Please let me know if it
#		doesn't work under your distribution, and we'll fix it.
#		We don't hate anyone, and like for everyone to use
#		our software, no matter what OS or distribution you're using.
#
# chkconfig: 2345 @HB_INITSTARTPRI@ @HB_INITSTOPPRI@
# description: Startup script high-availability services.
# processname: heartbeat
# pidfile: @localstatedir@/run/heartbeat.pid
# config: @sysconfdir@/ha.d/ha.cf
#
### BEGIN INIT INFO
# Description: @HB_PKG@ is a basic high-availability subsystem.
#	It will start services at initialization, and when machines go up
#	or down.  This version will also perform IP address takeover using
#	gratuitous ARPs.  It works correctly for a 2-node configuration,
#	and is extensible to larger configurations.
#	
#	It implements the following kinds of heartbeats:
#		- Bidirectional Serial Rings ("raw" serial ports)
#		- UDP/IP broadcast (ethernet, etc)
#		- UDP/IP multicast (ethernet, etc)
#		- Unicast heartbeats
#		- "ping" heartbeats (for routers, switches, etc.)
#	   	(to be used for breaking ties in 2-node systems
#		 and monitoring networking availability)
#
# Short-Description: High-availability services.
# Required-Start: $network $time $syslog
# Required-Stop: $network $time $syslog
# Default-Start: 3 5
# Default-Stop: 0 6
### END INIT INFO


HA_DIR=@sysconfdir@/ha.d; export HA_DIR
CONFIG=$HA_DIR/ha.cf
. $HA_DIR/shellfuncs

LOCKDIR=@localstatedir@/lock/subsys
RUNDIR=@localstatedir@/run

if
  [ -r /etc/SuSE-release ]
then
  # rc.status is new since SuSE 7.0
  [ -r /etc/rc.status ] && . /etc/rc.status
  [ -r /etc/rc.config ] && . /etc/rc.config

  # Determine the base and follow a runlevel link name.
  base=${0##*/}
  link=${base#*[SK][0-9][0-9]}

fi
if
  [ -z "$rc_done" ]
then
  rc_done="Done."
  rc_failed="Failed."
  rc_skipped="Skipped."
fi


# exec 2>>/var/log/ha-debug

#	This should probably be it's own autoconf parameter
#	because RH has moved it from time to time...
#	and I suspect Conectiva and Mandrake also supply it.

DISTFUNCS=/etc/rc.d/init.d/functions
PROC_HA=$HA_BIN/ha.o
SUBSYS=heartbeat
INSMOD=/sbin/insmod
US=`uname -n`

# Set this to a 1 if you want to automatically load kernel modules
USE_MODULES=@USE_MODULES@

[ -x $HA_BIN/heartbeat ] || exit 0

#
#	Some environments like it if we use their functions...
#
if
  [ ! -x $DISTFUNCS ]
then
  # Provide our own versions of these functions
  status() {
	$HA_BIN/heartbeat -s
  }
  echo_failure() {
      EchoEsc " Heartbeat failure [rc=$1]. $rc_failed"
      return $1
  }
  echo_success() {
	: Cool!  It started!
      EchoEsc "$rc_done"
  }
else
  . $DISTFUNCS
fi

#
#	See if they've configured things yet...
#
if
  [ ! -f $CONFIG ]
then
  EchoNoNl "Heartbeat not configured: $CONFIG not found."
  echo_failure 1
  exit 0
fi

init_watchdog() {
  if
    [  -f /proc/devices -a  -x $INSMOD ]
  then
    init_watchdog_linux
  fi
}

#
#	Install the softdog module if we need to
#
init_watchdog_linux() {
#
# 	We need to install it if watchdog is specified in $CONFIG, and
#	/dev/watchdog refers to a softdog device, or it /dev/watchdog
#	doesn't exist at all.
#
#	If we need /dev/watchdog, then we'll make it if necessary.
#
#	Whatever the user says we should use for watchdog device, that's
#	what we'll check for, use and create if necessary.  If they misspell
#	it, or don't put it under /dev, so will we.
#	Hope they do it right :-)
#
#
  insmod=no
  # What do they think /dev/watchdog is named?
  MISCDEV=`grep ' misc$' /proc/devices | cut -c1-4`
  MISCDEV=`Echo $MISCDEV`
  WATCHDEV=`ha_parameter watchdog`
  WATCHDEV=`Echo $WATCHDEV`
  if
    [ "X$WATCHDEV" != X ]
  then
    : Watchdog requested by $CONFIG file
  #
  #	We try and insmod the module if there's no dev or the dev exists
  #	and points to the softdog major device.
  #
    if
      [ ! -c "$WATCHDEV" ]
    then
      insmod=yes
    else
      case `ls -l "$WATCHDEV" 2>/dev/null` in
      *$MISCDEV,*)
	    insmod=yes;;
      *)	: "$WATCHDEV isn't a softdog device (wrong major)" ;;
      esac
    fi
  else
    : No watchdog device specified in $CONFIG file.
  fi
  case $insmod in
    yes)
      if
        grep softdog /proc/modules >/dev/null 2>&1 
      then
        : softdog already loaded
      else
        $INSMOD softdog nowayout=0 >/dev/null 2>&1
      fi;;
  esac
  if
    [ "X$WATCHDEV" != X -a ! -c "$WATCHDEV" -a $insmod = yes ]
  then
    minor=`cat /proc/misc | grep watchdog | cut -c1-4`
    mknod -m 600 $WATCHDEV c $MISCDEV $minor
  fi
} # init_watchdog_linux()


#
#	Start the heartbeat daemon...
#

start_heartbeat() {
  if
    ERROR=`$HA_BIN/heartbeat 2>&1`
  then
    : OK
  else
    return $?
  fi
}


#
#	Start Linux-HA
#

StartHA() {
  EchoNoNl "Starting High-Availability services: "
  $HA_BIN/ResourceManager verifyallidle
  if
    [ $USE_MODULES = 1 ]
  then
    #	Create /dev/watchdog and load module if we should
    init_watchdog
  fi
  rm -f $RUNDIR/ppp.d/*
  if
    [  -f $HA_DIR/ipresources -a ! -f $HA_DIR/haresources ]
  then
    mv $HA_DIR/ipresources $HA_DIR/haresources
  fi
  #	Start heartbeat daemon
  if
    start_heartbeat
  then
    echo_success
    return 0 
  else
    RC=$?
    echo_failure $RC
    if [ ! -z "$ERROR" ]; then
      Echo
      Echo "$ERROR"
    fi 
    return $RC
  fi
}

#
#	Ask heartbeat to stop.  It will give up its resources...
#
StopHA() {
  EchoNoNl "Stopping High-Availability services: "

  if
    $HA_BIN/heartbeat -k &> /dev/null	# Kill it
  then
    echo_success
    return 0
  else
    RC=$?
    echo_failure $RC
    return $RC
  fi
}

StatusHA() {
  $HA_BIN/heartbeat -s
}

StandbyHA() {
  auto_failback=`ha_parameter auto_failback | tr 'A-Z' 'a-z'`
  nice_failback=`ha_parameter nice_failback | tr 'A-Z' 'a-z'`

  case "$auto_failback" in
    *legacy*)	echo "auto_failback is set to legacy.  Cannot enter standby."
		exit 1;;
  esac
  case "$nice_failback" in
    *off*)	echo "nice_failback is disabled.  Cannot enter standby."
		exit 1;;
  esac
  case "${auto_failback}${nice_failback}" in
    "")	echo "auto_failback defaulted to legacy.  Cannot enter standby."
		exit 1;;
  esac

  echo "auto_failback: $auto_failback"
  if
    StatusHA >/dev/null 2>&1
  then
    EchoNoNl "Attempting to enter standby mode"
    if
      $HA_BIN/hb_standby
    then
      # It's impossible to tell how long this will take.
      echo_success
    else
      echo_failure $?
    fi
  else
    Echo "Heartbeat is not currently running."
    exit 1
  fi
}

#
#	Ask heartbeat to restart.  It will *keep* its resources
#
ReloadHA() {
  EchoNoNl "Reloading High-Availability services: "

  if
    $HA_BIN/heartbeat -r # Restart, and keep your resources
  then
    echo_success
    return 0
  else
    RC=$?
    echo_failure $RC
    return $RC
  fi
}

RunStartStop() {
  # Run pre-startup script if it exists
  if
    [  -f $HA_DIR/resource.d/startstop ]
  then
    $HA_DIR/resource.d/startstop  "$@"
  fi
}

RC=0
# See how we were called.

case "$1" in
  start)
	RunStartStop pre-start
	StartHA
	RC=$?
	Echo
	if
	  [ $RC -eq 0 ]
	then
	  [ ! -d $LOCKDIR ] && mkdir -p $LOCKDIR
	  touch $LOCKDIR/$SUBSYS
	fi
	RunStartStop post-start $RC
	;;

  standby)
	StandbyHA
        RC=$?;;

  status)
	StatusHA
	RC=$?;;

  stop)
	RunStartStop "pre-stop"
	StopHA
	RC=$?
	Echo
        if
          [ $RC -eq 0 ]
        then
          rm -f $LOCKDIR/$SUBSYS
        fi
        RunStartStop post-stop $RC
	;;

  restart)
        sleeptime=`ha_parameter deadtime`
	StopHA
	Echo
	EchoNoNl Waiting to allow resource takeover to complete:
	sleep $sleeptime
	sleep 10 # allow resource takeover to complete (hopefully).
	echo_success
	Echo
	StartHA
	Echo
	;;

  force-reload|reload)
	ReloadHA
	Echo
	RC=$?
	;;

  *)
	Echo "Usage: $0 {start|stop|status|restart|reload|force-reload}"
	exit 1
esac

exit $RC
#
#
#  $Log: heartbeat.in,v $
#  Revision 1.36  2004/05/17 15:12:08  lars
#  Reverting over-eager approach to disabling old resource manager code.
#
#  Revision 1.35  2004/05/15 09:28:09  andrew
#  Disable ALL legacy resource management iff configured with --enable-crm
#  Possibly I have been a little over-zealous but likely the feature(s)
#   would need to be re-written to use the new design anyway.
#
#  Revision 1.34  2004/03/19 16:32:18  alan
#  Put in a fix which causes us to always load the watchdog timer module with nowayout=0
#
#  Revision 1.33  2004/02/08 09:32:30  alan
#  Fixed the standby option in the init script to handle the switch to
#  auto_failback correctly.
#
#  Revision 1.32  2004/01/20 15:35:09  alan
#  Removed some old SuSE-isms from the init script.
#
#  Revision 1.31  2003/08/13 04:36:56  alan
#  Put in a minor change from Tuomo Soini.
#
#  Revision 1.30  2003/06/16 03:50:48  alan
#  Fixed up the default start/stop levels for heartbeat
#
#  Revision 1.29  2003/05/08 19:46:32  alan
#  Fixed an init script incompatibility with current SuSE releases pointed out by
#  Markus Markert <[e-mail]>.
#
#  Revision 1.28  2003/04/30 19:24:49  alan
#  Fixed a spelling error pointed out by Ozan Eren Bilgen <[e-mail]>
#
#  Revision 1.27  2003/02/21 13:41:01  alan
#  Minor comment changes to the heartbeat init script.
#
#  Revision 1.26  2003/02/20 01:26:42  horms
#  Fixed problem with Description: feild.
#  Tuomo Soini reported an undisclosed problem with the current format
#  on an undisclosed version of Redhat. The change appears not to
#  go against LSB 1.3.0[*] which Alan modified this file to conform with the
#  other day.
#
#  [*] http://www2.linuxbase.org/spec/refspecs/LSB_1.3.0/gLSB/gLSB/initscrcomconv.html
#
#  Revision 1.25  2003/02/19 17:50:20  alan
#  Fixed a minor comment bug pointed out by LMB.
#
#  Revision 1.24  2003/02/18 04:32:09  alan
#  Added some comments to the heartbeat init script necessary for LSB
#  compatibility.
#
#  Revision 1.23  2002/10/21 10:17:18  horms
#  hb api clients may now be built outside of the heartbeat tree
#
#  Revision 1.22  2002/10/15 13:41:31  alan
#  Switched heartbeat over to use the GSource library functions.
#  Added the standby capability to the heartbeat init script
#  Changed the proctrack library code to use cl_log() instead of g_log().
#  Removed a few unused header files.
#
#  Revision 1.21  2002/10/11 03:13:09  horms
#  Minor cleanup of output from a "restart"
#
#  Revision 1.20  2002/10/09 18:37:07  msoffen
#  Left call directly to startstop script instead of the wrapper function.
#
#  Revision 1.19  2002/10/09 18:35:54  msoffen
#  Created pre-start, pre-stop, post-stop, and pre-stop constructs in startstop and
#  moved startstop to documents (to not override).
#
#  Revision 1.18  2002/09/20 02:13:20  horms
#  Tidied up the output for the restart and reload targets.
#  This follows what is done for start and stop.
#  Works fine on RedHat 7.2. Hopefully it won't break anything/much else.
#
#  Revision 1.17  2002/09/10 15:54:57  msoffen
#  Added call on startup (if startstop scrip exists) to startstop script (not
#  resource based - heartbeat startup/shutdown based).
#
#  Revision 1.16  2002/08/12 14:37:53  msoffen
#  Replaced the last echononl with EchoNoNl.
#
#  Revision 1.15  2002/04/03 20:02:21  alan
#  Made the init starting and stopping priorities into autoconf variables.
#  They default to 75 and 5 respectively.  They should probably be overridden for
#  SuSE in the ConfigureMe script.
#
#  Revision 1.14  2002/04/02 19:40:36  alan
#  Failover was completely broken because of a typo in the configure.in file
#  Changed the run level priorities so that heartbeat starts after
#  drbd by default.
#  Changed it so that heartbeat by default runs in init level 5 too...
#
#  Fixed a problem which happened when both nodes started about simultaneously.
#  The result was that hb_standby wouldn't work afterwards.
#
#  Raised the debug level of some reasonably verbose messages so that you can
#  turn on debug 1 and not be flooded with log messages.
#
#  Changed the code so that in the case of nice_failback there is no waiting for
#  the other side to give up resources, because we negotiate this in advance.
#  It gets this information through and environment variable.
#
#  Revision 1.13  2002/03/21 02:03:00  alan
#  Added locking to the assignment of interfaces in IPaddr.
#
#  Revision 1.12  2002/03/05 21:13:06  alan
#  Put in fix suggested by Jo鉶 Miguel P. S