nagios插件（磁盘IO监控）脚本

2016-04-05 11:00

来自：网络

[ /jastme/blog/278531#]?

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#!/bin/bash
DISK= WARNING= CRITICAL= E_OK=0 E_WARNING=1 E_CRITICAL=2 E_UNKNOWN=3 show_help() { echo "$0 -d DEVICE -w tps,read,write -c tps,read,write | -h" nagios培训 echo
echo "This plug-in is used to be alerted when maximum hard drive io/s or sectors read|write/s is reached" echo echo " -d DEVICE DEVICE must be without /dev (ex: -d sda)" echo " -w/c TPS,READ,WRITE TPS means transfer per seconds (aka IO/s)" echo " READ and WRITE are in sectors per seconds" echo echo " example: $0 -d sda -w 200,100000,100000 -c 300,200000,200000" } # process args while [ ! -z "$1" ]; do case $1 in -d) shift; DISK=$1 ;; -w) shift; WARNING=$1 ;; -c) shift; CRITICAL=$1 ;; -h) show_help; exit 1 ;; esac shift done # generate HISTFILE filename HISTFILE=/var/tmp/check_diskstat.$DISK nagios实施 # check input parameters so we can continu ! sanitize() {
# check device name if [ -z "$DISK" ]; then echo "Need device name, ex: sda" exit $E_UNKNOWN fi # check thresholds if [ -z "$WARNING" ]; then echo "Need warning threshold" exit $E_UNKNOWN fi if [ -z "$CRITICAL" ]; then echo "Need critical threshold" exit $E_UNKNOWN fi # if [ -z "$WARN_TPS" -o -z "$WARN_READ" -o -z "$WARN_WRITE" ]; then 监控软件 echo "Need 3 values for warning threshold (tps,read,write)"
exit $E_UNKNOWN fi if [ -z "$CRIT_TPS" -o -z "$CRIT_READ" -o -z "$CRIT_WRITE" ]; then echo "Need 3 values for critical threshold (tps,read,write)" exit $E_UNKNOWN fi } readdiskstat() { if [ ! -f "/sys/block/$1/stat" ]; then return $E_UNKNOWN fi cat /sys/block/$1/stat } readhistdiskstat() { [ -f $HISTFILE ] && cat $HISTFILE } # process thresholds WARN_TPS=$(echo $WARNING | cut -d , -f 1) WARN_READ=$(echo $WARNING | cut -d , -f 2) WARN_WRITE=$(echo $WARNING | cut -d , -f 3) CRIT_TPS=$(echo $CRITICAL | cut -d , -f 1) CRIT_READ=$(echo $CRITICAL | cut -d , -f 2) CRIT_WRITE=$(echo $CRITICAL | cut -d , -f 3) # check args sanitize NEWDISKSTAT=$(readdiskstat $DISK) if [ $? -eq $E_UNKNOWN ]; then echo "Cannot read disk stats, check your /sys filesystem for $DISK" exit $E_UNKNOWN fi if [ ! -f $HISTFILE ]; then echo $NEWDISKSTAT >$HISTFILE echo "UNKNOWN - Initial buffer creation..." exit $E_UNKNOWN fi OLDDISKSTAT=$(readhistdiskstat) if [ $? -ne 0 ]; then echo "Cannot read histfile $HISTFILE..." exit $E_UNKNOWN fi OLDDISKSTAT_TIME=$(stat $HISTFILE | grep Modify | sed 's/^.*: $.*$$/\1/') nagios配置 OLDDISKSTAT_EPOCH=$(date -d "$OLDDISKSTAT_TIME" +%s)
NEWDISKSTAT_EPOCH=$(date +%s) echo $NEWDISKSTAT >$HISTFILE # now we have old and current stat; # let compare it OLD_SECTORS_READ=$(echo $OLDDISKSTAT | awk '{print $3}') NEW_SECTORS_READ=$(echo $NEWDISKSTAT | awk '{print $3}') OLD_READ=$(echo $OLDDISKSTAT | awk '{print $1}') NEW_READ=$(echo $NEWDISKSTAT | awk '{print $1}') OLD_WRITE=$(echo $OLDDISKSTAT | awk '{print $5}') NEW_WRITE=$(echo $NEWDISKSTAT | awk '{print $5}') OLD_SECTORS_WRITTEN=$(echo $OLDDISKSTAT | awk '{print $7}') NEW_SECTORS_WRITTEN=$(echo $NEWDISKSTAT | awk '{print $7}') # kernel handles sectors by 512bytes # [ /kernel/Documentation/block/stat.txt]kernel/Documentation/block/stat.txt SECTORBYTESIZE=512 let "SECTORS_READ = $NEW_SECTORS_READ - $OLD_SECTORS_READ" let "SECTORS_WRITE = $NEW_SECTORS_WRITTEN - $OLD_SECTORS_WRITTEN" let "TIME = $NEWDISKSTAT_EPOCH - $OLDDISKSTAT_EPOCH" let "BYTES_READ_PER_SEC = $SECTORS_READ * $SECTORBYTESIZE / $TIME" let "BYTES_WRITTEN_PER_SEC = $SECTORS_WRITE * $SECTORBYTESIZE / $TIME" let "TPS=($NEW_READ - $OLD_READ + $NEW_WRITE - $OLD_WRITE) / $TIME" let "KBYTES_READ_PER_SEC = $BYTES_READ_PER_SEC / 1024" let "KBYTES_WRITTEN_PER_SEC = $BYTES_WRITTEN_PER_SEC / 1024" OUTPUT="" EXITCODE=$E_OK # check TPS if [ $TPS -gt $WARN_TPS ]; then if [ $TPS -gt $CRIT_TPS ]; then OUTPUT="critical IO/s (>$CRIT_TPS), " EXITCODE=$E_CRITICAL else OUTPUT="warning IO/s (>$WARN_TPS), " EXITCODE=$E_WARNING fi fi # check read if [ $BYTES_READ_PER_SEC -gt $WARN_READ ]; then if [ $BYTES_READ_PER_SEC -gt $CRIT_READ ]; then OUTPUT="${OUTPUT}critical read sectors/s (>$CRIT_READ), " 开源监控软件 EXITCODE=$E_CRITICAL
else OUTPUT="${OUTPUT}warning read sectors/s (>$WARN_READ), " [ "$EXITCODE" -lt $E_CRITICAL ] && EXITCODE=$E_WARNING fi fi # check write if [ $BYTES_WRITTEN_PER_SEC -gt $WARN_WRITE ]; then if [ $BYTES_WRITTEN_PER_SEC -gt $CRIT_WRITE ]; then OUTPUT="${OUTPUT}critical write sectors/s (>$CRIT_WRITE), " EXITCODE=$E_CRITICAL else OUTPUT="${OUTPUT}warning write sectors/s (>$WARN_WRITE), " [ "$EXITCODE" -lt $E_CRITICAL ] && EXITCODE=$E_WARNING nagios安装 fi fi echo "${OUTPUT}summary: $TPS io/s, read $SECTORS_READ sectors (${KBYTES_READ_PER_SEC}kB/s), write $SECTORS_WRITE

想做Nagios， Zabbix,Cacti,iTop各种交流的，可以进入开源监控工具Nagios交流 QQ群号：476809427