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常用的Linux監控腳本代碼

   為大家提供五個常用Linux監控腳本(查看主機網卡流量、系統狀況監控、監控主機的磁盤空間,當使用空間超過90%就通過發mail來發警告、監控CPU和內存的使用情況、全方位監控主機),有需要的朋友不妨看看哦!

  1、查看主機網卡流量

  #!/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

  2、系統狀況監控

  #!/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、監控主機的磁盤空間,當使用空間超過90%就通過發mail來發警告

  #!/bin/bash

  #monitor available disk space

  SPACE='df | sed -n '/ / $ / p' | gawk '{print $5}' | sed 's/%//'

  if [ $SPACE -ge 90 ]

  then

  [email protected]

  fi

  4、 監控CPU和內存的使用情況

  #!/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、全方位監控主機

  #!/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 &

  放在crontab裡每小時自動執行:

  0 * * * * /home/check_xu.sh

  這樣便會在/home/oslog/host_yyyymmdd/hh目錄下生成各小時cpu、內存、網絡,IO的統計數據。

  如果某個時間段產生問題了,就可以去看對應的日志信息,看看當時的主機性能如何。

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