check_mdb/check_mdb

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2020-11-24 15:09:05 +01:00
#!/bin/bash
#
# Nagios plugin to check slapd schema
#
# Author : Benjamin Renard <brenard@easter-eggs.com>
# Date : Wed, 12 Jun 2019 13:15:33 +0200
# Source : http://gogs.zionetrix.net/check_slapd_schema
#
SUDO_USER=""
MDB_STAT=mdb_stat
DB_PATH="/var/lib/ldap"
USED_PAGES_PERC_WARNING_LIMIT=70
USED_PAGES_PERC_CRITICAL_LIMIT=90
DEBUG=0
function debug() {
if [ $DEBUG -eq 1 ]
then
>&2 echo -e "[DEBUG] $1"
fi
}
function format_size() {
SIZE=$1
UNIT="b"
if [ -z "$SIZE" -o "$SIZE" == "0" ]
then
SIZE="0"
UNIT=""
elif [ $SIZE -ge 1073741824 ]
then
SIZE=$( echo "scale=1; $SIZE/1073741824"|bc )
UNIT="Gb"
elif [ $SIZE -ge 1048576 ]
then
SIZE=$( echo "scale=1; $SIZE/1048576"|bc )
UNIT="Mb"
elif [ $SIZE -ge 1024 ]
then
SIZE=$( echo "scale=1; $SIZE/1024"|bc )
UNIT="Kb"
fi
echo "${SIZE}${UNIT}"
}
function usage() {
cat << EOF
Usage : $0 [-d] [-h] [-w warning] [-c critical] [options]
-u Sudo as specified user to run mdb_stat
-s Path to mdb_stat (Default : auto-detected)
-p Database path (Default : $DB_PATH)
-w Used pages percentage warning limit (Default: $USED_PAGES_PERC_WARNING_LIMIT)
-c Used pages percentage critical limit (Default: $USED_PAGES_PERC_CRITICAL_LIMIT)
-d Debug mode
-h Show this message
EOF
}
while getopts "hu:s:p:d" OPTION
do
case $OPTION in
u)
SUDO_USER=$OPTARG
;;
s)
MDB_STAT=$OPTARG
;;
p)
DB_PATH=$OPTARG
;;
w)
USED_PAGES_PERC_WARNING_LIMIT=$OPTARG
;;
c)
USED_PAGES_PERC_CRITICAL_LIMIT=$OPTARG
;;
d)
DEBUG=1
;;
h)
usage
exit 0
;;
*)
echo "Unkown option '$OPTION'"
usage
exit 1
esac
done
CMD="$MDB_STAT -ef $DB_PATH"
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debug "mdb_stat command = '$CMD'"
if [ -n "$SUDO_USER" ]
then
debug "run slapdschema command as $SUDO_USER"
OUTPUT=$( sudo -u $SUDO_USER $CMD 2>&1 )
EXITCODE=$?
else
OUTPUT=$( $CMD 2>&1 )
EXITCODE=$?
fi
debug "Output :\n$OUTPUT"
debug "Exit code : $EXITCODE"
if [ $EXITCODE -ne 0 -o -z "$OUTPUT" ]
then
echo "UNKNOWN - mdb_stat exit with $EXITCODE"
exit 3
fi
raw_used_pages=$( echo -e "$OUTPUT"|grep -E '^ +Number of pages used: '|sed 's/^ \+Number of pages used: \([0-9]\+\)$/\1/' )
free_pages=$( echo -e "$OUTPUT"|grep -E '^ +Free pages: '|sed 's/^ \+Free pages: \([0-9]\+\)$/\1/' )
let used_pages=raw_used_pages-free_pages
debug "Used/free pages: $raw_used_pages / $free_pages. Real used pages: $used_pages"
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max_pages=$( echo -e "$OUTPUT"|grep -E '^ +Max pages: '|sed 's/^ \+Max pages: \([0-9]\+\)$/\1/' )
let perc_used=$used_pages*100/$max_pages
debug "Used/max pages: $used_pages / $max_pages ($perc_used%)"
page_size=$( echo -e "$OUTPUT"|grep -E '^ +Page size:'|sed 's/^ \+Page size: \([0-9]\+\)$/\1/' )
debug "Page size: $page_size"
let max_size=$max_pages*$page_size
let used_size=$used_pages*$page_size
debug "Used/max sizes: $used_size/$max_size"
if [ $perc_used -gt $USED_PAGES_PERC_CRITICAL_LIMIT ]
then
STATE=CRITICAL
EXITCODE=2
elif [ $perc_used -gt $USED_PAGES_PERC_WARNING_LIMIT ]
then
STATE=WARNING
EXITCODE=1
else
STATE=OK
EXITCODE=0
fi
echo "$STATE - $perc_used% pages used ($used_pages pages on $max_pages / $( format_size $used_size) on $( format_size $max_size ))"
exit $EXITCODE