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Here is a Bourne shell Nagios plugin which can be executed directly on the NAS Synology. It's inspired by the great work of Jur Groen and Nicolas Ordonez.
The plugin will check the following elements :
user@host:~$ cat .ssh/id_rsa.pub | ssh -l root NAS_IP -p 22 'cat >> .ssh/authorized_keys'
user@host:~$ scp -P 22 check_snmp.sh root@NAS_IP:/usr/syno/sbin/
user@host:~$ ssh -l root -p 22 NAS_IP "/usr/syno/sbin/check_snmp.sh -h NAS_IP -u SNMP_LOGIN -p SNMP_PASSWORD -w 80 -c 90"
#! /bin/sh
# check_snmp_synology for nagios version 1.3
# 30.04.2013 Nicolas Ordonez, Switzerland
# 03.10.2014 Jur Groen, Syso IT Services, The Netherlands
# 06.11.2014 shebangthedolphins.net
# 05.12.2014 shebangthedolphins.net add disk usage check
#---------------------------------------------------
# this plugin checks the health of your Synology NAS
# - System status (Power, Fans)
# - Disks status
# - RAID status
# - DSM update status
#
# this plugin now makes use of SNMP V3 for enhanced security
# Tested with DSM 5.0
#---------------------------------------------------
# Based on http://download.synology.com/download/ds/userguide/Synology_DiskStation_MIB_Guide_enu_20110725.pdf
#---------------------------------------------------
#Variables definition
## NAGIOS returns
CRITICAL=2
WARNING=1
OK=0
RETURN=0 #everything's fine, by default
## If arguments found
option_found=0
#get the number of partitions
NB_part=$(df -h | grep "/" | grep -v "\(tmpfs\|dev \|rootfs \)" | wc -l)
##OIDs
OID_syno="1.3.6.1.4.1.6574"
OID_model="1.3.6.1.4.1.6574.1.5.1.0"
OID_serialNumber="1.3.6.1.4.1.6574.1.5.2.0"
OID_DSMVersion="1.3.6.1.4.1.6574.1.5.3.0"
OID_upgradeAvailable="1.3.6.1.4.1.6574.1.5.4.0"
OID_systemStatus="1.3.6.1.4.1.6574.1.1.0"
OID_powerStatus="1.3.6.1.4.1.6574.1.3.0"
OID_systemFanStatus="1.3.6.1.4.1.6574.1.4.1.0"
OID_CPUFanStatus="1.3.6.1.4.1.6574.1.4.2.0"
OID_temp="1.3.6.1.4.1.6574.1.2.0"
OID_disk=""
OID_diskID="1.3.6.1.4.1.6574.2.1.1.2"
OID_diskModel="1.3.6.1.4.1.6574.2.1.1.3"
OID_diskStatus="1.3.6.1.4.1.6574.2.1.1.5"
OID_diskTemp="1.3.6.1.4.1.6574.2.1.1.6"
OID_RAID=""
OID_RAIDName="1.3.6.1.4.1.6574.3.1.1.2"
OID_RAIDStatus="1.3.6.1.4.1.6574.3.1.1.3"
#Functions
FunctionDiskSpace()
{
SORTIE=""
for i in $(seq 1 "$NB_part"); do
PARTITION=$(df -h | grep "/" | tr -s " " | grep -v "\(tmpfs\|dev \|rootfs \)" | head -n "$i" | tail -n 1 | grep "/" | cut -d " " -f 6)
UTI=$(df -h | grep "/" | tr -s " " | grep -v "\(tmpfs\|dev \|rootfs \)" | head -n "$i" | tail -n 1 | grep "/" | cut -d " " -f 5)
DISPO=$(df -h | grep "/" | tr -s " " | grep -v "\(tmpfs\|dev \|rootfs \)" | head -n "$i" | tail -n 1 | grep "/" | cut -d " " -f 4)
SORTIE="$(echo ""$PARTITION" is used at "$UTI", "$DISPO" remaining free space") \n"$SORTIE""
TEST=$(echo "$UTI" | sed 's/%//')
if [ $TEST -gt "$WARNING_SPACE" ]; then
RETURN="$WARNING"
if [ "$TEST" -gt "$CRITICAL_SPACE" ]; then
RETURN="$CRITICAL"
fi
fi
done
if [ "$1" == "Output" ]; then
echo -e "$SORTIE"
fi
}
usage()
{
echo "usage: ./check_snmp_synology -u [snmp username] -p [snmp password] -h [hostname] -w [warning occuped space in % -c [max occuped space in %]"
echo ""
exit 3
}
while getopts u:p:h:c:w: OPTNAME; do
case "$OPTNAME" in
u)
SNMPUSERNAME="$OPTARG"
option_found=1
;;
p)
SNMPPASSWORD="$OPTARG"
option_found=1
;;
h)
HOSTNAME="$OPTARG"
option_found=1
;;
w)
WARNING_SPACE="$OPTARG"
option_found=1
;;
c)
CRITICAL_SPACE="$OPTARG"
option_found=1
;;
*)
usage
;;
esac
done
# Script beginning :
if [ "$option_found" -eq "0" ] || [ "$HOSTNAME" == "" ] ; then
usage
else
# DiskSpace function usage but without print anything
FunctionDiskSpace NoOutput
nbDISK=$(/usr/syno/sbin/snmpwalk -OQne -v 3 -t 10 -l authNoPriv -u $SNMPUSERNAME -a MD5 -A $SNMPPASSWORD $HOSTNAME .1.3.6.1.4.1.6574.2.1.1.3 2>/dev/null|wc -l)
#if SNMP failed, exit with error
if [ "$?" != "0" ] ; then
echo "CRITICAL - Problem with SNMP request"
exit "$CRITICAL"
fi
nbRAID=$(/usr/syno/sbin/snmpwalk -OQne -v 3 -t 10 -l authNoPriv -u $SNMPUSERNAME -a MD5 -A $SNMPPASSWORD $HOSTNAME .1.3.6.1.4.1.6574.3.1.1.2 2>/dev/null|wc -l)
for i in $(seq 1 $nbDISK);
do
OID_DISK="$OID_disk $OID_diskID.$(($i-1)) $OID_diskModel.$(($i-1)) $OID_diskStatus.$(($i-1)) $OID_diskTemp.$(($i-1)) "
done
for i in $(seq 1 $nbRAID);
do
OID_RAID="$OID_RAID $OID_RAIDName.$(($i-1)) $OID_RAIDStatus.$(($i-1))"
done
#MODEL
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_model" 2>/dev/null)
model=$(echo $temp | grep $OID_model | cut -d " " -f3 | sed "s/\"//g")
#echo $model
#serialNumber
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_serialNumber" 2>/dev/null)
serialNumber=$(echo $temp | grep $OID_serialNumber | cut -d " " -f3 | sed "s/\"//g")
#echo $serialNumber
#OID_upgradeAvailable
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_upgradeAvailable" 2>/dev/null)
#OID_DSMVersion
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_DSMVersion" 2>/dev/null)
DSMVersion=$(echo $temp | grep $OID_DSMVersion | cut -d "\"" -f2)
#echo "$DSMVersion"
#OID_systemStatus
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_systemStatus" 2>/dev/null)
systemStatus=$(echo $temp | grep $OID_systemStatus | cut -d " " -f3 | sed "s/\"//g")
#echo $systemStatus
#OID_powerStatus
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_powerStatus" 2>/dev/null)
powerStatus=$(echo $temp | grep $OID_powerStatus | cut -d " " -f3 | sed "s/\"//g")
#echo $powerStatus
#OID_systemFanStatus
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_systemFanStatus" 2>/dev/null)
systemFanStatus=$(echo $temp | grep $OID_systemFanStatus | cut -d " " -f3 | sed "s/\"//g")
#echo $systemFanStatus
#OID_CPUFanStatus
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_CPUFanStatus" 2>/dev/null)
CPUFanStatus=$(echo $temp | grep $OID_CPUFanStatus | cut -d " " -f3 | sed "s/\"//g")
#echo $CPUFanStatus
#OID_temp
temp=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_temp" 2>/dev/null)
TEMP=$(echo "$temp" | grep "$OID_temp" | cut -d " " -f3 | sed "s/\"//g")
#echo "$TEMP"
#Disks state
for i in $(seq 1 "$nbDISK")
do
temp01=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_diskStatus.$(($i-1))" 2>/dev/null)
temp02=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_diskModel.$(($i-1))" 2>/dev/null)
temp03=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_diskID.$(($i-1))" 2>/dev/null)
temp04=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_diskTemp.$(($i-1))" 2>/dev/null)
status=$(echo "$temp01" | grep "$OID_disk" | cut -d " " -f3)
diskmodel=$(echo "$temp02" | grep "$OID_disk" | cut -d "\"" -f2 | sed 's/\s//g')
ID=$(echo "$temp03" | grep "$OID_disk" | cut -d "\"" -f2)
temp=$(echo "$temp04" | grep "$OID_disk" | cut -d " " -f3)
if [ "$status" -eq "5" ]; then
disques="$(echo "The Hard "$ID" model "$diskmodel" is damaged")\\n"$disques""
RETURN="$CRITICAL"
elif [ "$status" -eq "4" ]; then
disques="$(echo "The Hard "$ID" model "$diskmodel" has partitions damaged")\\n"$disques""
RETURN="$CRITICAL"
elif [ "$status" -eq "3" ]; then
disques="$(echo "The Hard "$ID" model "$diskmodel" is not partitioned")\\n"$disques""
RETURN="$WARNING"
elif [ "$status" -eq "2" ]; then
disques="$(echo "The Hard "$ID" model "$diskmodel" has system partitions but no data")\\n"$disques""
RETURN="$WARNING"
elif [ "$status" -eq "1" ]; then
disques="$(echo "The Hard "$ID" model "$diskmodel" is functioning normally")\\n"$disques""
#RETURN=$(echo "$OK")
else
disques="$(echo "The Hard "$ID" model "$diskmodel" is in an unknown state")\\n"$disques""
RETURN="$WARNING"
fi
done
#RAID State
for i in $(seq 1 "$nbRAID")
do
temp01=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_RAIDName.$(($i-1))" 2>/dev/null)
temp02=$(/usr/syno/sbin/snmpwalk -OQne -t 10 -v 3 -l authNoPriv -u "$SNMPUSERNAME" -a MD5 -A "$SNMPPASSWORD" "$HOSTNAME" "$OID_RAIDStatus.$(($i-1))" 2>/dev/null)
Volume=$(echo "$temp01" | grep "$OID_disk" | cut -d "\"" -f2)
Statut=$(echo "$temp02" | grep "$OID_disk" | cut -d " " -f3)
if [ "$Statut" -eq "11" ]; then
raids="$(echo "The RAID "$Volume" is degraded") "$raids""
RETURN="$CRITICAL"
elif [ "$Statut" -eq "12" ]; then
raids="$(echo "The RAID "$Volume" has crashed") "$raids""
RETURN="$CRITICAL"
elif [ "$Statut" -eq "1" ]; then
raids="$(echo "The RAID "$Volume" is fine") "$raids""
else
raids="$(echo "The RAID "$Volume" is in an unknown state") "$raids""
RETURN="$WARNING"
fi
done
# Nagios States
if [ "$RETURN" -eq "2" ] || [ "$systemFanStatus" -eq "2" ] || [ "$CPUFanStatus" -eq "2" ] || [ "$powerStatus" -eq "2" ] || [ "$systemStatus" -eq "2" ]; then
echo -e "CRITICAL - The NAS "$model" - SN : "$serialNumber" - DSM : "$DSMVersion" has a problem"
echo -e "NAS temperature is "$TEMP"°C - Fan Status : "$systemFanStatus" - CPU Fan Status : "$CPUFanStatus" - Power Status : "$powerStatus" - System Status : "$systemStatus" " | sed 's/ 1 / OK
for i in "$disques"; do
echo -e "$i" | sed '/^$/d'
done
for i in "$raids"; do
echo -e "$i" | sed '/^$/d'
done
FunctionDiskSpace Output
exit "$CRITICAL"
fi
if [ "$RETURN" -eq "1" ]; then
echo -e "WARNING - The NAS "$model" - SN : "$serialNumber" - DSM : "$DSMVersion" is in Warning state"
echo -e "NAS temperature is "$TEMP"°C - Fan Status : "$systemFanStatus" - CPU Fan Status : "$CPUFanStatus" - Power Status : "$powerStatus" - System Status : "$systemStatus" " | sed 's/ 1 / OK
for i in "$disques"; do
echo -e "$i" | sed '/^$/d'
done
for i in "$raids"; do
echo -e "$i" | sed '/^$/d'
done
FunctionDiskSpace Output
exit "$WARNING"
fi
if [ "$RETURN" -eq "0" ]; then
echo -e "OK - The NAS "$model" - SN : "$serialNumber" - DSM : "$DSMVersion" is fine"
echo -e "NAS temperature is "$TEMP"°C - Fan Status : "$systemFanStatus" - CPU Fan Status : "$CPUFanStatus" - Power Status : "$powerStatus" - System Status : "$systemStatus" " | sed 's/ 1 / OK
for i in "$disques"; do
echo -e "$i" | sed '/^$/d'
done
for i in "$raids"; do
echo -e "$i" | sed '/^$/d'
done
FunctionDiskSpace Output
exit "$OK"
fi
echo -e "CRITICAL - The NAS "$model" - SN : "$serialNumber" - DSM : "$DSMVersion" is in an indeterminate State"
exit "$CRITICAL"
fi
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