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概述
我们原先在服务器上想分析硬件瓶颈，需要执行一系列的 linux 命令。对于 linux 命令不熟悉的人来说，比较困难。现在有一套集成的 shell 脚本，把常用的 linux 命令都包含在里面，一键式分析性能瓶颈
脚本功能
1、查看 CPU 利用率与负载（top、vmstat、sar）
2、查看磁盘、I/O 负载（df、iostat、iotop、sar、dstat）
3、查看内存利用率（free、vmstat）
4、查看 TCP 连接状态（netstat、ss）
5、查看 CPU 与内存占用最高的 10 个进程（top、ps）
6、查看网络流量（ifconfig、iftop、iptraf）
脚本内容
#!/bin/bash
#
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
}
if [ $LOGNAME != root ]; then
echo "Please use the root account operation."
exit 1
fi
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
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利用率与负载
echo "---------------------------------------"
i=1
while [[ $i -le 3 ]]; do
echo -e "\033[32m 参考值${i}\033[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 [[ $i -le 3 ]]; do
echo -e "\033[32m 参考值${i}\033[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: $IOWAIT"
echo -e "Read/s:\n$READ"
echo -e "Write/s:\n$WRITE"
i=$(($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}%" >> $DISK_LOG
fi
done
echo "---------------------------------------"
echo -e "Disk total:\n${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)
#硬盘inode利用率
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)
#内存利用率
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)
#网络连接状态
echo "---------------------------------------"
COUNT=`netstat -antp |awk '{status[$6]++}END{for(i in status) print i,status[i]}'`
echo -e "TCP connection status:\n$COUNT"
echo "---------------------------------------"
;;
cpu_top10)
#占用CPU高的前10个进程
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"\n";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 $CPU_LOG` ]]; then
echo -e "\033[32m 参考值${i}\033[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)
#占用内存高的前10个进程
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"\n";else printf $i}}' |sort -k4 -nr |head -10 > $MEM_LOG
if [[ -n `cat $MEM_LOG` ]]; then
echo -e "\033[32m 参考值${i}\033[0m"
cat $MEM_LOG
> $MEM_LOG
else
echo "No process using the Memory."
break
fi
i=$(($i+1))
sleep 1
done
echo "---------------------------------------"
break
;;
traffic)
#查看网络流量
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 $6}'`
IN=`awk 'BEGIN{printf "%.1f\n",'$((${NEW_IN}-${OLD_IN}))'/1024/128}'`
OUT=`awk 'BEGIN{printf "%.1f\n",'$((${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
脚本运行
sh show_sys_info.sh
1）cpu_load：分析 cpu
util：cpu 已使用百分比
user use：用户使用 cpu 百分比
system use：系统使用 cpu 百分比
I/O wait：I/O 等待百分比
三次刷新，间隔时间 1s
2）disk_load 分析磁盘
Util：每秒磁盘处理的百分比
vda：
I/O Wait：IO 等待时间
Read/s：每秒磁盘读数据量
vda：
Write/s：每秒磁盘写数据量
vda：
3）disk_use 磁盘使用情况
disk total：打印磁盘数量和磁盘分区使用情况
4）disk_inode 如果有磁盘 inodo 超过 90%，这里会打印出来
5）mem_use 内存占用情况
Total：总内存
use：已使用内存
free：剩余内存
cache：缓存占用内存
6）tcp_status tcp 状态
7）cpu_top10 占用 cpu 最大的十个进程
8）mem_top10 占用内存最大的十个进程
9）traffic 查看网卡进出流量
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一条 SAR 走天下
SunOS/HU-UX 这些系统可用吗？