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check_redis.sh
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check_redis.sh
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#!/bin/sh
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
PROGNAME=`basename $0`
VERSION="Version 0.1.0,"
AUTHOR="MAB (MAB@MAB.NET), Based on Mike Adolphs (http://www.matejunkie.com/) check_nginx.sh code"
ST_OK=0
ST_WR=1
ST_CR=2
ST_UK=3
hostname="localhost"
port=6379
output_dir=/tmp
secure=0
print_version() {
echo "$VERSION $AUTHOR"
}
print_help() {
print_version $PROGNAME $VERSION
echo ""
echo "$PROGNAME is a Nagios plugin to check redis. (http://redis.io)"
echo "It also parses the redis info output to get used memory, changes "
echo "current connections, etc..."
echo ""
echo "$PROGNAME -H localhost -P 6379 -o /tmp [-w INT] [-c INT]"
echo ""
echo "Options:"
echo " -H/--hostname)"
echo " Defines the hostname. Default is: localhost"
echo " -P/--port)"
echo " Defines the port. Default is: 80"
echo " -p/--password)"
echo " Name of the server's status page defined in the location"
echo " directive of your nginx configuration. Default is:"
echo " -o/--output-directory)"
echo " Specifies where to write the tmp-file that the check creates."
echo " Default is: /tmp"
echo " -w/--warning)"
echo " Sets a warning level for used_memory. Default is: off"
echo " -c/--critical)"
echo " Sets a critical level for used_memory. Default is:"
echo " off"
exit $ST_UK
}
while test -n "$1"; do
case "$1" in
-help|-h)
print_help
exit $ST_UK
;;
--version|-v)
print_version $PROGNAME $VERSION
exit $ST_UK
;;
--hostname|-H)
hostname=$2
shift
;;
--port|-P)
port=$2
shift
;;
--password|-p)
secure=1
password=$2
;;
--output-directory|-o)
output_dir=$2
shift
;;
--warning|-w)
warning=$2
shift
;;
--critical|-c)
critical=$2
shift
;;
*)
echo "Unknown argument: $1"
print_help
exit $ST_UK
;;
esac
shift
done
get_wcdiff() {
if [ ! -z "$warning" -a ! -z "$critical" ]
then
wclvls=1
if [ ${warning} -gt ${critical} ]
then
wcdiff=1
fi
elif [ ! -z "$warning" -a -z "$critical" ]
then
wcdiff=2
elif [ -z "$warning" -a ! -z "$critical" ]
then
wcdiff=3
fi
}
val_wcdiff() {
if [ "$wcdiff" = 1 ]
then
echo "Please adjust your warning/critical thresholds. The warning must be lower than the critical level!"
exit $ST_UK
elif [ "$wcdiff" = 2 ]
then
echo "Please also set a critical value when you want to use warning/critical thresholds!"
exit $ST_UK
elif [ "$wcdiff" = 3 ]
then
echo "Please also set a warning value when you want to use warning/critical thresholds!"
exit $ST_UK
fi
}
check_pid() {
if [ -f "$path_pid/$name_pid" ]
then
retval=0
else
retval=1
fi
}
get_status() {
filename=${output_dir}/${PROGNAME}-${hostname}.1
if [ "$secure" = 1 ]
then
redis-cli -h $hostname -p $port -a $password info > ${filename}
else
redis-cli -h $hostname -p $port info > ${filename}
fi
}
get_vals() {
used_memory=`grep used_memory ${filename} | grep -v human | awk -F: '{print $2}' | tr -d '\r'`
used_memory_human=`grep used_memory_human ${filename} | awk -F: '{print $2}' | tr -d '\r'`
changes_since_last_save=`grep changes_since_last_save ${filename} | awk -F: '{print $2}' | tr -d '\r'`
connected_clients=`grep connected_clients ${filename} | awk -F: '{print $2}' | tr -d '\r'`
connected_slaves=`grep connected_slaves ${filename} | awk -F: '{print $2}' | tr -d '\r'`
uptime_in_days=`grep uptime_in_days ${filename} | awk -F: '{print $2}' | tr -d '\r'`
db0keys=`grep db0 ${output_dir}/$PROGNAME-${hostname}.1 | awk -F, '{print $1}' | awk -F= '{print $2}' | tr -d '\r'`
db0expires=`grep db0 ${output_dir}/$PROGNAME-${hostname}.1 | awk -F, '{print $2}' | awk -F= '{print $2}' | tr -d '\r'`
rm -f ${filename}
}
do_output() {
output="Redis is using \
$used_memory_human of RAM; \
$uptime_in_days days up; \
$changes_since_last_save Changes; \
$connected_clients Clients; \
$connected_slaves Slaves; \
DB0 ($db0keys keys $db0expires expires)"
}
do_perfdata() {
perfdata="'Memory'=$used_memory_human 'Clients'=$connected_clients 'DB0.keys'=$db0keys"
}
# Here we go!
get_wcdiff
val_wcdiff
get_status
if [ ! -s "$filename" ]; then
echo "CRITICAL - Could not connect to server"
exit $ST_CR
else
get_vals
if [ -z "$used_memory_human" ]; then
echo "CRITICAL - Error parsing server output"
exit $ST_CR
else
do_output
do_perfdata
fi
fi
if [ -n "$warning" -a -n "$critical" ]
then
if [ "$used_memory" -ge "$warning" -a "$used_memory" -lt "$critical" ]
then
echo "WARNING - ${output} | ${perfdata}"
exit $ST_WR
elif [ "$used_memory" -ge "$critical" ]
then
echo "CRITICAL - ${output} | ${perfdata}"
exit $ST_CR
else
echo "OK - ${output} | ${perfdata}"
exit $ST_OK
fi
else
echo "OK - ${output} | ${perfdata}"
exit $ST_OK
fi