系统信息采集

目的

分析系统资源性能瓶颈

功能

1. 查看CPU利用率和负载
2. 查看磁盘大小和I/O负载
3. 查看内存使用率
4. 查看TCP连接状态
5. 查看CPU和内存占用最高10进程
6. 查看网络流量

一、环境检测

#系统检测
sys_check(){
	#判断系统
	if [ -e /etc/redhat-release ];then
		REDHAT=`cat /etc/redhat-release |awk '{print $1}'`
	else
		DEBIAN=`cat /etc/issue |awk '{print $1}'`
	fi
	#判断包管理方式
	if [[ $REDHAT =~ 'CentOS|Red' ]];then
		PM=yum
	elif [[ $DEBIAN =~ 'Ubuntu|ubutnu' ]];then
		PM=apt-get
	else
		echo -e "System does not support"
		exit 1
	fi
}

#判断用户身份
if [ $USER != root ];then
	echo "Please use the root account operation"
	exit 1
fi

#检测需要命令
if ! which vmstat &>/dev/null;then
	echo "vmstat is install..."
	sys_check
	$PM install procps -y >/dev/null
	if [ $? -ne 0 ];then
		exit
	fi
	echo "-----complete-----"

fi

if ! which iostat &>/dev/null;then
	echo "iostat is install..."
	sys_check
	$PM install sysstat -y >/dev/null
	if [ $? -ne 0 ];then
		exit
	fi
	echo "-----complete-----"
fi

二、服务菜单

PS3="Input your choice: "
while :
do
	select input in cpu_load disk_load mem_use tcp_status cpu_top10 mem_top10 traffic quit
	do
		case $input in
		cpu_load)
			cpu_load
			break;;
		disk_load)
			disk_load
			break;;
		disk_inode)
			disk_inode
			break;;
		mem_use)
			mem_use
			break;;
		tcp_status)
			tcp_status
			break;;
		cpu_top10)
			cpu_top10
			break;;
		mem_top10)
			mem_top10
			break;;
		traffic)
			traffic
			break;;
		quit)
			exit
		*)
			break;;
		esac
	done
done

三、功能

1.CPU利用率与负载

UTIL=`vmstat |awk '{if(NR==3){print 100-$15"%"}}'`
USE=`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: $USE"
echo "System use: $SYS"
echo "I/O wait": $IOWAIT

二、磁盘大小与I/O负载

TOTAL=`fdisk -l |awk '/Disk.*bytes/ && /\/dev/{print $2,int($3)"GB"}'`
UTIL=`iostat |awk '/^[s,v]{OFS=": ";print $1,$NF"%"}'`
READ=`iostat |awk '/^[s,v]{OFS=": ";print $1,$6"KB"}'`
WRITE=`iostat |awk '/^[s,v]{OFS=": ";print $1,$7"KB"}'`
IOWAIT=`vmstat |awk '{if(NR==3){print $16"%"}}'`
echo "Disk: $TOTAL"
echo -e "Util:\n\t$UTIL"
echo -e "Read/s:\n\t$READ"
echo -e "Write/s:\n\t$WRITE"
echo "I/O wait: $IOWAIT"

三、内存使用率

TOTAL=`free -m |awk '/^Mem/{print $2}'`
USE=`free |awk 'awk '/^Mem/{print $3}'`
RATE=$((USE/TOTAL))
echo "当前内存使用: $RATE%"

四、TCP连接状态

COUNT=`ss -ant |awk '!/State/{status[$1]++}END{for(i in status)print i,status[i]}'`
echo -e "TCP connection status:\n\t$COUNT"

五、CPU占用前10进程

CPU_LOG=/tmp/cpu_top10.log
ps aux |awk '{if($3!=0){{print "PID: "$2" CPU: "$3"% --> "}for(i=11;i<=NF;i++)if(i==NF)print $i"\n";else print $i}}' |sort -k4 -nr |head -10 >$CPU_LOG

if [[ -s $CPU_LOG ]]; then
	cat $CPU_LOG
	> $CPU_LOG
else
	echo "No process using CPU"
	break
fi

六、内存占用前10进程

MEM_LOG=/tmp/cpu_top10.log
ps aux |awk '{if($4!=0){{print "PID: "$2" Memory: "$4"% --> "}for(i=11;i<=NF;i++)if(i==NF)print $i"\n";else print $i}}' |sort -k4 -nr |head -10 >$MEM_LOG

if [[ -s $MEM_LOG ]]; then
	cat $MEM_LOG
	> $MEM_LOG
else
	echo "No process using Memory"
	break
fi

七、网络流量

while :
do
	read -p "Please input your network card name: " eth
    if [ `ifconfig |grep -c "\<$eth\>"` -eq 1 ];then
    	break
    else
    	echo "Please recheck your network card name"
    fi
done
#CentOS7版本与6版本不同
ORX=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`
0TX=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`
sleep 1
NRX=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $4;else if(NR==5)print $6}'`
NTX=`ifconfig $eth |awk -F'[: ]+' '/bytes/{if(NR==8)print $9;else if(NR==7)print $6}'`
IN=`awk 'BEGIN{printf "%.1f\n",'$(($NRX-$ORX))'/1024/128}'`
OUT=`awk 'BEGIN{printf "%.1f\n",'$(($NTX-$OTX))'/1024/128}'`
echo -e "recive: ${IN}MB/s\ntransmit: ${OUT}MB/s"