监控内存
被监控端
1 添加插件check_mem.sh
#!/bin/bash
USAGE="`basename $0` [-w|--warning]<percent free> [-c|--critical]<percent free>" THRESHOLD_USAGE="WARNING threshold must be greater than CRITICAL: `basename $0` $*" calc=/tmp/memcalc percent_free=/tmp/mempercent critical="" warning="" STATE_OK=0 STATE_WARNING=1 STATE_CRITICAL=2 STATE_UNKNOWN=3 # print usage if [[ $# -lt 4 ]] then echo "" echo "Wrong Syntax: `basename $0` $*" echo "" echo "Usage: $USAGE" echo "" exit 0 fi # read input while [[ $# -gt 0 ]] do case "$1" in -w|--warning) shift warning=$1 ;; -c|--critical) shift critical=$1 ;; esac shift done # verify input if [[ $warning -eq $critical || $warning -lt $critical ]] then echo "" echo "$THRESHOLD_USAGE" echo "" echo "Usage: $USAGE" echo "" exit 0 fi # Total memory available total=`free -m | head -2 |tail -1 |gawk '{print $2}'` # Total memory used used=`free -m | head -2 |tail -1 |gawk '{print $3}'` # Calc total minus used free=`free -m | head -2 |tail -1 |gawk '{print $2-$3}'` # normal values #echo "$total"MB total #echo "$used"MB used #echo "$free"MB free # make it into % percent free = ((free mem / total mem) * 100) echo "5" > $calc # decimal accuracy echo "k" >> $calc # commit echo "100" >> $calc # multiply echo "$free" >> $calc # division integer echo "$total" >> $calc # division integer echo "/" >> $calc # division sign echo "*" >> $calc # multiplication sign echo "p" >> $calc # print percent=`/usr/bin/dc $calc|/bin/sed 's/^\./0./'|/usr/bin/tr "." " "|/usr/bin/gawk {'print $1'}` #percent1=`/usr/bin/dc $calc` #echo "$percent1" if [[ "$percent" -le $critical ]] then echo "CRITICAL - $free MB ($percent%) Free Memory" exit 2 fi if [[ "$percent" -le $warning ]] then echo "WARNING - $free MB ($percent%) Free Memory" exit 1 fi if [[ "$percent" -gt $warning ]] then echo "OK - $free MB ($percent%) Free Memory" exit 0 fi2添加命令
在nrpe.cfg
command[check_mem]=/usr/local/nagios/libexec/check_mem.sh -w 10 -c 5
nagios服务器端
servers.cfg添加服务
define service {
host_name Nagios-db-slave230 service_description check_mem check_period 24x7 max_check_attempts 4 normal_check_interval 3 retry_check_interval 2 contact_groups sagroup notification_interval 10 notification_period 24x7 notification_options w,u,c,r check_command check_nrpe!check_mem }重启nagios OK