常用的主機監控Shell腳本
常用的服務器監控除了用開源軟件，比如： cacti，nagios監控外是否可以自己寫shell腳本呢？根據自己的需求寫出的shell腳本更能滿足需求，更能細化主機監控的全面性。
1、查看主機網卡流量
#!/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</pre>
2、系統狀況監控
#!/bin/shsystemstat.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":"%Mconnect=netstat -na | grep "219.238.148.30:80" | wc -lecho "$time $connect" >> ./temp/connect_count.txt</pre>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/bashmonitor available disk space
SPACE='df | sed -n '/ \ / $ / p' | gawk '{print $5}' | sed 's/%//' if [ $SPACE -ge 90 ] then fty89@163.com fi</pre>
4、 監控CPU和內存的使用情況
#!/bin/bashscript 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" >> $OUTFILE</pre>
5、全方位監控主機
#!/bin/bashcheck_xu.sh
0 /home/check_xu.sh
DAT="
date +%Y%m%d" HOUR="date +%H" DIR="/home/oslog/host_${DAT}/${HOUR}" DELAY=60 COUNT=60whether 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} > ${DIR}/cpu0${DAT}.log 2>&1 &
/usr/bin/mpstat -P 1 ${DELAY} ${COUNT} > ${DIR}/cpu1${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} > ${DIR}/netedev${DAT}.log 2>&1 &</pre>
放在crontab里每小時自動執行：
0 * * * * /home/check_xu.sh這樣會在/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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