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      1 #!/bin/bash
      2 #
      3 # Copyright (C) 2007-2009 Red Hat, Inc. All rights reserved.
      4 #
      5 # This copyrighted material is made available to anyone wishing to use,
      6 # modify, copy, or redistribute it subject to the terms and conditions
      7 # of the GNU General Public License v.2.
      8 #
      9 # You should have received a copy of the GNU General Public License
     10 # along with this program; if not, write to the Free Software Foundation,
     11 # Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     12 #
     13 # This file is part of LVM2.
     14 # It is required for the proper handling of failures of LVM2 mirror
     15 # devices that were created using the -m option of lvcreate.
     16 #
     17 #
     18 # chkconfig: 12345 02 99
     19 # description: Starts and stops dmeventd monitoring for lvm2
     20 #
     21 # For Red-Hat-based distributions such as Fedora, RHEL, CentOS.
     22 #	       
     23 ### BEGIN INIT INFO
     24 # Provides: lvm2-monitor
     25 # Required-Start: $local_fs
     26 # Required-Stop: $local_fs
     27 # Default-Start: 1 2 3 4 5
     28 # Default-Stop: 0 6
     29 # Short-Description: Monitoring of LVM2 mirrors, snapshots etc. using dmeventd
     30 ### END INIT INFO
     31 
     32 . /etc/init.d/functions
     33 
     34 DAEMON=lvm2_monitor
     35 
     36 exec_prefix=
     37 sbindir=${exec_prefix}/sbin
     38 
     39 VGCHANGE=${sbindir}/vgchange
     40 VGS=${sbindir}/vgs
     41 
     42 LOCK_FILE="/var/lock/subsys/$DAEMON"
     43 
     44 WARN=1
     45 
     46 start()
     47 {
     48 	ret=0
     49 	# TODO do we want to separate out already active groups only?
     50 	VGSLIST=`$VGS --noheadings -o name 2> /dev/null`
     51 	for vg in $VGSLIST
     52 	do
     53 	    action "Starting monitoring for VG $vg:" $VGCHANGE --monitor y $vg || ret=$?
     54 	done
     55 
     56 	return $ret
     57 }
     58 
     59 
     60 stop()
     61 {
     62 	ret=0
     63 	# TODO do we want to separate out already active groups only?
     64 	if test "$WARN" = "1"; then
     65 	   echo "Not stopping monitoring, this is a dangerous operation. Please use force-stop to override."
     66 	   return 1
     67 	fi
     68 	VGSLIST=`$VGS --noheadings -o name 2> /dev/null`
     69 	for vg in $VGSLIST
     70 	do
     71 	    action "Stopping monitoring for VG $vg:" $VGCHANGE --monitor n $vg || ret=$?
     72 	done
     73 	return $ret
     74 }
     75 
     76 rtrn=1
     77 
     78 # See how we were called.
     79 case "$1" in
     80   start)
     81 	start
     82 	rtrn=$?
     83 	[ $rtrn = 0 ] && touch $LOCK_FILE
     84 	;;
     85 
     86   force-stop)
     87 	WARN=0
     88 	stop
     89 	rtrn=$?
     90 	[ $rtrn = 0 ] && rm -f $LOCK_FILE
     91 	;;
     92 
     93   stop)
     94 	test "$runlevel" = "0" && WARN=0
     95 	test "$runlevel" = "6" && WARN=0
     96 	stop
     97 	rtrn=$?
     98 	[ $rtrn = 0 ] && rm -f $LOCK_FILE
     99 	;;
    100 
    101   restart)
    102 	WARN=0
    103 	if stop
    104 	then
    105 		start
    106 	fi 
    107 	rtrn=$?
    108 	;;
    109 
    110   status)
    111 	# TODO anyone with an idea how to dump monitored volumes?
    112 	;;
    113 
    114   *)
    115 	echo $"Usage: $0 {start|stop|restart|status|force-stop}"
    116 	;;
    117 esac
    118 
    119 exit $rtrn
    120