几个常用的Linux监控脚本

原文: http://turbomailtt.blog.51cto.com/934223/521336

  • 查看主机网卡流量
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    #!/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: " $tx_result "kbps"
           sleep 2
    done
  • 系统状况监控
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    #!/bin/sh
    #systemstat.sh
    #Mike.Xu
    IP=192.168.1.227
    top -n 2| grep "Cpu" >>. /temp/cpu .txt
    free -m | grep "Mem" >> . /temp/mem .txt
    df -k | grep "sda1" >> . /temp/drive_sda1 .txt
    #df -k | grep sda2 >> ./temp/drive_sda2.txt
    df -k | grep "/mnt/storage_0" >> . /temp/mnt_storage_0 .txt
    df -k | grep "/mnt/storage_pic" >> . /temp/mnt_storage_pic .txt
    time =` date +%m "." %d " " %k ":" %M`
    connect=` netstat -na | grep "219.238.148.30:80" | wc -l`
    echo "$time  $connect" >> . /temp/connect_count .txt
  • 监控主机的磁盘空间,当使用空间超过90%就通过发mail来发警告
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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
  • 监控CPU和内存的使用情况
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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
  • 全方位监控主机
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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 &

放在crontab里每小时自动执行:

0 * * * * /home/check_xu.sh

这样会在/home/oslog/host_yyyymmdd/hh目录下生成各小时cpu、内存、网络,IO的统计数据。

如果某个时间段产生问题了,就可以去看对应的日志信息,看看当时的主机性能如何。

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