1、查看主机网卡流量
代码如下:
#!/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、系统状况监控
代码如下:
#!/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
代码如下:
#!/bin/bash
#monitor available disk space
SPACE=df | sed -n / / $ / p | gawk {print $5} | sed s/%//
if [ $SPACE -ge 90 ]
then
jbxue123@163.com
fi
4、 监控CPU和内存的使用情况
代码如下:
#!/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” >> $OUTFILE
5、全方位监控主机
代码如下:
#!/bin/bash
# check_xu.sh
# 0 * * * * /home/check_xu.sh
DAT=”`date +%Y%m%d`”
HOUR=”`date +%H`”
DIR=”/home/oslog/host_${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这样便会在/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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