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#!/bin/sh
############################
# main event script for ctdb
#
# This script is called with one of the following sets of arguments
# startup : called when ctdb starts
# shutdown : called when ctdb shuts down
# takeip : called when an IP address is taken over
# releaseip : called when an IP address is released
# recovered : called when ctdb has finished a recovery event
. $CTDB_BASE/functions
loadconfig
case "$1" in
init)
# make sure we have a blank state directory for the scripts to work with
/bin/rm -rf $CTDB_BASE/state
/bin/mkdir -p $CTDB_BASE/state || {
ret=$?
echo "/bin/mkdir -p $CTDB_BASE/state - failed - $ret"
exit $ret
}
;;
setup)
# set any tunables from the config file
set | grep ^CTDB_SET_ | cut -d_ -f3- |
while read v; do
varname=`echo $v | cut -d= -f1`
value=`echo $v | cut -d= -f2`
ctdb setvar $varname $value || exit 1
echo "Set $varname to $value"
done || exit 1
;;
monitor)
# We should never enter swap, so SwapTotal == SwapFree.
[ "$CTDB_CHECK_SWAP_IS_NOT_USED" = "yes" ] && {
if [ -n "`grep '^Swap\(Total\|Free\)' /proc/meminfo | uniq -s 10 -u`" ]; then
echo We are swapping:
cat /proc/meminfo
ps auxfww
fi
}
# warn when we get low on memory
[ -z "$CTDB_MONITOR_FREE_MEMORY_WARN" ] || {
FREE_MEM=`free -m | grep "buffers/cache" | while read A B C D ;do /bin/echo -n $D ; done`
[ `expr "$FREE_MEM" "<" "$CTDB_MONITOR_FREE_MEMORY_WARN"` != "0" ] && {
echo "Running low on memory. Free:$FREE_MEM while CTDB treshold is $CTDB_MONITOR_FREE_MEMORY_WARN"
}
}
# monitor that we are not running out of memory
[ -z "$CTDB_MONITOR_FREE_MEMORY" ] || {
FREE_MEM=`free -m | grep "buffers/cache" | while read A B C D ;do /bin/echo -n $D ; done`
[ `expr "$FREE_MEM" "<" "$CTDB_MONITOR_FREE_MEMORY"` != "0" ] && {
echo "OOM. Free:$FREE_MEM while CTDB treshold is $CTDB_MONITOR_FREE_MEMORY"
cat /proc/meminfo
ps auxfww
echo m > /proc/sysrq-trigger
ctdb disable
sleep 3
ctdb shutdown
}
}
;;
*)
ctdb_standard_event_handler "$@"
;;
esac
# all OK
exit 0
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