最近时不时有朋友问我关于服务器监控方面的问题,问常用的服务器监控除了用开源软件,比如:cacti,nagios监控外是否可以自己写shell脚本呢?根据自己的需求写出的shell脚本更能满足需求,更能细化主机监控的全面性。
下面是我常用的几个主机监控的脚本,大家可以根据自己的情况在进行修改,希望能给大家一点帮助。
1、查看主机网卡流量
- #!/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、系统状况监控
- #!/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、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
- #!/bin/bash
- #monitor available disk space
- SPACE='df | sed -n '/ \ / $ / p' | gawk '{print $5}' | sed 's/%//'
- if [ $SPACE -ge 90 ]
- then
- fty89@163.com
- fi
4、 监控CPU和内存的使用情况
- #!/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" >> $OUTFILE
5、全方位监控主机
- #!/bin/bash
- # check_xu.sh
- # 0 * * * * /home/check_xu.sh
- DAT="`date +%Y%m%d`"
- HOUR="`date +%H`"
- DIR="/home/oslog/host_${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。