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|
#!/bin/sh
#
# chkconfig: 345 14 88
# description: Runs "multipath" when designated number of SCSI disks available.
#
# Source function library.
. /etc/init.d/functions
# Note that you should not run *chkconfig* to enable this initscript
# on nodes where you do not expect to see autocluster iSCSI devices.
# Doing so will merely annoy you by slowing down system boot by
# waiting for phantom devices to appear.
PATH=/sbin:/bin:/usr/sbin:/usr/bin
RETVAL=0
npaths=$((@@SHAREDDISK_COUNT@@ * @@SHARED_DISK_MULTIPATH_NUMPATHS@@))
correct_number_of_devices ()
{
_glob="$1"
_num_desired=$2
_n=$(grep AUTCLSTR $_glob 2>/dev/null | wc -l)
[ "$_n" = "$_num_desired" ]
}
wait_for_devices ()
{
_glob="$1"
_num_desired=$2
_timeout="${3:-60}"
_count=0
while : ; do
if correct_number_of_devices "$_glob" $_num_desired ; then
return 0
fi
if [ $_count -ge $_timeout ] ; then
echo "TIMEOUT (iscsi)"
return 1
fi
_count=$(($_count + 1))
sleep 1
done
}
sd_pat='/sys/block/sd*/device/vendor'
slave_pat='/sys/block/dm-*/slaves/*/device/vendor'
start()
{
echo -n "Setting up multipath for iSCSI devices:"
if wait_for_devices "$sd_pat" $npaths ; then
_c=0
while : ; do
multipath
if correct_number_of_devices "$slave_pat" $npaths ; then
break
fi
if [ $_c -ge 30 ] ; then
echo "TIMEOUT (multipath)"
failure
RETVAL=1
break
fi
multipath -F
_c=$(($_c + 1))
sleep 1
done
success
echo
else
RETVAL=1
failure
fi
}
stop()
{
echo -n "Flushing multipath devices:"
if multipath -F && \
wait_for_devices "$slave_pat" 0 ; then
success
else
RETVAL=1
failure
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit $RETVAL
|
