/etc/ctdb/events.d/00.ctdb is in ctdb 1.12+git20120201-5.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | #!/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
. $CTDB_BASE/functions
loadconfig
ctdb_setup_service_state_dir "ctdb"
#
update_config_from_tdb() {
# Pull optional ctdb configuration data out of config.tdb
_key="public_addresses:node#$(ctdb -t 1 xpnn|sed -e 's/.*://')"
_t="$service_state_dir/public_addresses"
rm -f "$_t"
if ctdb pfetch config.tdb "$_key" "$_t" 2>/dev/null && \
[ -s "$_t" -a -n "$CTDB_PUBLIC_ADDRESSES"] && \
! cmp -s "$_t" "$CTDB_PUBLIC_ADDRESSES" ; then
echo "CTDB public address configuration has changed."
echo "Extracting new configuration from database."
diff "$_t" "$CTDB_PUBLIC_ADDRESSES"
cp "$_t" "$CTDB_PUBLIC_ADDRESSES"
echo "Restarting CTDB"
service ctdb restart &
fi
}
ctdb_check_args "$@"
case "$1" in
init)
# make sure we have a blank state directory for the scripts to work with
rm -rf $CTDB_VARDIR/state
# Look at the pattern - this should not be -rf!!!
rm -f $ctdb_managed_dir/*
mkdir -p $CTDB_VARDIR/state || {
ret=$?
echo "mkdir -p $CTDB_VARDIR/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
;;
startup)
update_config_from_tdb &
;;
monitor)
# Inherit the debug level from ctdbd on each monitor run. If
# there's a more urgent need then override CTDB_CURRENT_DEBUGLEVEL
# using a file in $CTDB_BASE/rc.local.d/.
ctdb_set_current_debuglevel create
# We should never enter swap, so SwapTotal == SwapFree.
[ "$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 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 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
|