The commonly used Shell script host monitoring

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Recently, from time to time a friend asked me about the server monitoring problems, ask the server monitoring used in addition to the use of open source software, such as: cacti, Nagios monitoring can write shell scripts? According to their own needs to write shell scripts can meet the demand, more comprehensive refined control.

Here are several commonly used control script, you can modify in according to their own situation, I hope to give everyone a little help.

1, Check the host adapter traffic

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#!/bin/bash
#!/bin/bash
#network
#Mike.Xu
while : ; do
      time='date +%m"-"%d" "%k":"%M'
      day='date +%m"-"%d'
      rx_before='ifconfig eth0|sed -n "8"p|awk '{print $2}'|cut -c7-'
      tx_before='ifconfig eth0|sed -n "8"p|awk '{print $6}'|cut -c7-'
      sleep 2
      rx_after='ifconfig eth0|sed -n "8"p|awk '{print $2}'|cut -c7-'
      tx_after='ifconfig eth0|sed -n "8"p|awk '{print $6}'|cut -c7-'
      rx_result=$[(rx_after-rx_before)/256]
      tx_result=$[(tx_after-tx_before)/256]
      echo "$time Now_In_Speed: "$rx_result"kbps Now_OUt_Speed: "$tx_result"kbps"
      sleep 2
done
done



 

2, System status monitoring

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#!/bin/sh
#systemstat.sh
#Mike.Xu
IP=192.168.1.227
top -n 2| grep "Cpu" >>./temp/cpu.txt
free -m | grep "Mem" >> ./temp/mem.txt
df -k | grep "sda1" >> ./temp/drive_sda1.txt
#df -k | grep sda2 >> ./temp/drive_sda2.txt
df -k | grep "/mnt/storage_0" >> ./temp/mnt_storage_0.txt
df -k | grep "/mnt/storage_pic" >> ./temp/mnt_storage_pic.txt
time=`date +%m"."%d" "%k":"%M`
connect=`netstat -na | grep "219.238.148.30:80" | wc -l`
echo "$time  $connect" >> ./temp/connect_count.txt



 

3, The monitoring host disk space, when using the space of more than 90% by sending mail to send warning

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#!/bin/bash
#monitor available disk space
SPACE='df | sed -n '/ \ / $ / p' | gawk '{print $5}' | sed  's/%//'
if [ $SPACE -ge 90 ]
then

fi



 

4, The use of monitor CPU and memory

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#!/bin/bash
#script  to capture system statistics
OUTFILE=/home/xu/capstats.csv
DATE='date +%m/%d/%Y'
TIME='date +%k:%m:%s'
TIMEOUT='uptime'
VMOUT='vmstat 1 2'
 USERS='echo $TIMEOUT | gawk '{print $4}' '
LOAD='echo $TIMEOUT | gawk '{print $9}' | sed "s/,//' '
FREE='echo $VMOUT | sed -n '/[0-9]/p' | sed -n '2p' | gawk '{print $4} ' '
IDLE='echo  $VMOUT | sed -n '/[0-9]/p' | sed -n '2p' |gawk '{print $15}' '
echo "$DATE,$TIME,$USERS,$LOAD,$FREE,$IDLE" >> $OUTFILE



 

5, A full range of monitoring host

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#!/bin/bash
# check_xu.sh
# 0 * * * * /home/check_xu.sh
 
DAT="`date +%Y%m%d`"
HOUR="`date +%H`"
DIR="/home/oslog/host_${DAT}/${HOUR}"
DELAY=60
COUNT=60
# whether the responsible directory exist
if ! test -d ${DIR}
then
        /bin/mkdir -p ${DIR}
fi
# general check
export TERM=linux
/usr/bin/top -b -d ${DELAY} -n ${COUNT} > ${DIR}/top_${DAT}.log 2>&1 &
# cpu check
/usr/bin/sar -u ${DELAY} ${COUNT} > ${DIR}/cpu_${DAT}.log 2>&1 &
#/usr/bin/mpstat -P 0 ${DELAY} ${COUNT} > ${DIR}/cpu_0_${DAT}.log 2>&1 &
#/usr/bin/mpstat -P 1 ${DELAY} ${COUNT} > ${DIR}/cpu_1_${DAT}.log 2>&1 &
# memory check
/usr/bin/vmstat ${DELAY} ${COUNT} > ${DIR}/vmstat_${DAT}.log 2>&1 &
# I/O check
/usr/bin/iostat ${DELAY} ${COUNT} > ${DIR}/iostat_${DAT}.log 2>&1 &
# network check
/usr/bin/sar -n DEV ${DELAY} ${COUNT} > ${DIR}/net_${DAT}.log 2>&1 &
#/usr/bin/sar -n EDEV ${DELAY} ${COUNT} > ${DIR}/net_edev_${DAT}.log 2>&1 &



On automatic execution per hour in crontab:

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0 * * * * /home/check_xu.sh



This will generate an hour CPU, memory, network in the /home/oslog/host_yyyymmdd/hh directory, the statistical data of IO.

 

If a period of time the problem, you can see the log information corresponding to the host, have a look at the time of performance.

J4ML

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Posted by Albert at December 21, 2013 - 12:14 AM