shell脚本实例-shell 分析系统瓶颈脚本

#!/usr/bin/bash

PS3="Your choice is: [10 for quit]"

#检查是那个系统

os_check() {

if [ -e /etc/redhat-release ]; then

REDHAT=`cat /etc/redhat-release |cut -d' ' -f1`

else

DEBIAN=`cat /etc/issue |cut -d' ' -f1`

fi

if [ "$REDHAT" == "CentOS" -o "$REDHAT" == "Red" ]; then

P_M=yum

elif [ "$DEBIAN" == "Ubuntu" -o "$DEBIAN" == "ubutnu" ]; then

P_M=apt-get

else

Operating system does not support.

exit 1

fi

}

#判断是否是root用哦过户

if [ $LOGNAME != root ]; then

echo "Please use the root account operation."

exit 1

fi

#查看cpu工具是否安装

if ! which vmstat &>/dev/null; then

echo "vmstat command not found, now the install."

sleep 1

os_check

$P_M install procps -y

echo "-----------------------------------------------------------------------"

fi

#查看磁盘使用率的工具是否安装

if ! which iostat &>/dev/null; then

echo "iostat command not found, now the install."

sleep 1

os_check

$P_M install sysstat -y

echo "-----------------------------------------------------------------------"

fi

while true; do

select input in cpu_load disk_load disk_use disk_inode mem_use tcp_status cpu_top10 mem_top10 traffic quit; do

case $input in

cpu_load)

#CPU usage and load

echo "---------------------------------------"

i=1

while [[ $i -le 3 ]]; do

echo -e "[32m Reference value${i}[0m"

UTIL=`vmstat |awk '{if(NR==3)print 100-$15"%"}'`

USER=`vmstat |awk '{if(NR==3)print $13"%"}'`

SYS=`vmstat |awk '{if(NR==3)print $14"%"}'`

IOWAIT=`vmstat |awk '{if(NR==3)print $16"%"}'`

echo "Util: $UTIL"

echo "User use: $USER"

echo "System use: $SYS"

echo "I/O wait: $IOWAIT"

i=$(($i+1))

sleep 1

done

echo "---------------------------------------"

break

;;

disk_load)

#硬盘I/O负载

echo "---------------------------------------"

i=1

while [[ $i -le 3 ]]; do

echo -e "[32m Reference value${i}[0m"

UTIL=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$NF"%"}'`

READ=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$6"KB"}'`

WRITE=`iostat -x -k |awk '/^[v|s]/{OFS=": ";print $1,$7"KB"}'`

IOWAIT=`vmstat |awk '{if(NR==3)print $16"%"}'`

echo -e "Util:"

echo -e "${UTIL}"

echo -e "I/O Wait: $IOWAIT"

echo -e "Read/s: $READ"

echo -e "Write/s: $WRITE"

i=$(($i+1))

sleep 1

done

echo "---------------------------------------"

break

;;

disk_use)

#硬盘利用率

DISK_LOG=/tmp/disk_use.tmp

DISK_TOTAL=`fdisk -l |awk '/^Disk.*bytes/&&//dev/{printf $2" ";printf "%d",$3;print "GB"}'`

USE_RATE=`df -h |awk '/^/dev/{print int($5)}'`

for i in $USE_RATE; do

if [ $i -gt 90 ];then

PART=`df -h |awk '{if(int($5)=='''$i''') print $6}'`

echo "$PART = ${i}%" >> $DISK_LOG

fi

done

echo "---------------------------------------"

echo -e "Disk total: ${DISK_TOTAL}"

if [ -f $DISK_LOG ]; then

echo "---------------------------------------"

cat $DISK_LOG

echo "---------------------------------------"

rm -f $DISK_LOG

else

echo "---------------------------------------"

echo "Disk use rate no than 90% of the partition."

echo "---------------------------------------"

fi

break

;;

disk_inode)

#disk inode useage

INODE_LOG=/tmp/inode_use.tmp

INODE_USE=`df -i |awk '/^/dev/{print int($5)}'`

for i in $INODE_USE; do

if [ $i -gt 90 ]; then

PART=`df -h |awk '{if(int($5)=='''$i''') print $6}'`

echo "$PART = ${i}%" >> $INODE_LOG

fi

done

if [ -f $INODE_LOG ]; then

echo "---------------------------------------"

rm -f $INODE_LOG

else

echo "---------------------------------------"

echo "Inode use rate no than 90% of the partition."

echo "---------------------------------------"

fi

break

;;

mem_use)

#memory useage

echo "---------------------------------------"

MEM_TOTAL=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}END{print "G"}'`

USE=`free -m |awk '{if(NR==3) printf "%.1f",$3/1024}END{print "G"}'`

FREE=`free -m |awk '{if(NR==3) printf "%.1f",$4/1024}END{print "G"}'`

CACHE=`free -m |awk '{if(NR==2) printf "%.1f",($6+$7)/1024}END{print "G"}'`

echo -e "Total: $MEM_TOTAL"

echo -e "Use: $USE"

echo -e "Free: $FREE"

echo -e "Cache: $CACHE"

echo "---------------------------------------"

break

;;

tcp_status)

#tcp connection status

echo "---------------------------------------"

COUNT=`netstat -antp |awk '{status[$6]++}END{for(i in status) print i,status[i]}'`

echo -e "TCP connection status: $COUNT"

echo "---------------------------------------"

;;

cpu_top10)

# top 10 of cpu processes

echo "---------------------------------------"

CPU_LOG=/tmp/cpu_top.tmp

i=1

while [[ $i -le 3 ]]; do

#ps aux |awk '{if($3>0.1)print "CPU: "$3"% -->",$11,$12,$13,$14,$15,$16,"(PID:"$2")" |"sort -k2 -nr |head -n 10"}' > $CPU_LOG

ps aux |awk '{if($3>0.1){{printf "PID: "$2" CPU: "$3"% --> "}for(i=11;i<=NF;i++)if(i==NF)printf $i" ";else printf $i}}' |sort -k4 -nr |head -10 > $CPU_LOG

#循环从11列（进程名）开始打印，如果i等于最后一行，就打印i的列并换行，否则就打印i的列

if [[ -n `cat $CPU_LOG` ]]; then

echo -e "[32m Reference value${i}[0m"

cat $CPU_LOG

> $CPU_LOG

else

echo "No process using the CPU."

break

fi

i=$(($i+1))

sleep 1

done

echo "---------------------------------------"

break

;;

mem_top10)

#top of memory processes

echo "---------------------------------------"

MEM_LOG=/tmp/mem_top.tmp

i=1

while [[ $i -le 3 ]]; do

#ps aux |awk '{if($4>0.1)print "Memory: "$4"% -->",$11,$12,$13,$14,$15,$16,"(PID:"$2")" |"sort -k2 -nr |head -n 10"}' > $MEM_LOG

ps aux |awk '{if($4>0.1){{printf "PID: "$2" Memory: "$3"% --> "}for(i=11;i<=NF;i++)if(i==NF)printf $i" ";else printf $i}}' |sort -k4 -nr |head -10 > $MEM_LOG

if [[ -n `cat $MEM_LOG` ]]; then

echo -e "[32m Reference value${i}[0m"

cat $MEM_LOG

> $MEM_LOG

else

echo "No process using the Memory."

break

fi

i=$(($i+1))

sleep 1

done

echo "---------------------------------------"

break

;;

traffic)

# check network

while true; do

read -p "Please enter the network card name(eth[0-9] or em[0-9]): " eth

#if [[ $eth =~ ^eth[0-9]$ ]] || [[ $eth =~ ^em[0-9]$ ]] && [[ `ifconfig |grep -c "<$eth>"` -eq 1 ]]; then

if [ `ifconfig |grep -c "<$eth>"` -eq 1 ]; then

break

else

echo "Input format error or Don't have the card name, please input again."

fi

done

echo "---------------------------------------"

echo -e " In ------ Out"

i=1

while [[ $i -le 3 ]]; do

#OLD_IN=`ifconfig $eth |awk '/RX bytes/{print $2}' |cut -d: -f2`

#OLD_OUT=`ifconfig $eth |awk '/RX bytes/{print $6}' |cut -d: -f2`

OLD_IN=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`

#CentOS6和CentOS7 ifconfig输出进出流量信息位置不同，CentOS6中RX与TX行号等于8，CentOS7中RX行号是5，TX行号是5，所以就做了个判断.

OLD_OUT=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`

sleep 1

NEW_IN=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`

NEW_OUT=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`

IN=`awk 'BEGIN{printf "%.1f ",'$((${NEW_IN}-${OLD_IN}))'/1024/128}'`

OUT=`awk 'BEGIN{printf "%.1f ",'$((${NEW_OUT}-${OLD_OUT}))'/1024/128}'`

echo "${IN}MB/s ${OUT}MB/s"

i=$(($i+1))

sleep 1

done

echo "---------------------------------------"

break

;;

quit)

exit 0

;;

*)

echo "---------------------------------------"

echo "Please enter the number."

echo "---------------------------------------"

break

;;

esac

done

done

作者简介： 
陈志珂（头条号：强扭的瓜不好吃）目前就职于中国最大的安卓应用软件公司，任高级工程师，现在公司任php开发工程师，python开发工程师，高级运维工程师，公众号“铅笔学园”运维内容合作作者之一。
铅笔学园：IT资源分享|知识分享，做初级程序员的指明灯