网卡流量监控

2018-05-15  ·  3 分钟阅读  ·  Shell

#!/bin/bash PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export PATH function traffic_monitor {

系统版本

OS_NAME=$(sed -n ‘1p’ /etc/issue)

网口名

eth=$1 #判断网卡存在与否,不存在则退出 if [ ! -d /sys/class et/$eth ];then

echo -e "Network-Interface Not Found"
echo -e "You system have network-interface:\n`ls /sys/class

et`” exit 5 fi while [ “1” ] do

状态

STATUS=“fine”

获取当前时刻网口接收与发送的流量

RXpre=$(cat /proc et/dev | grep $eth | tr : ” ” | awk ‘{print $2}’) TXpre=$(cat /proc et/dev | grep $eth | tr : ” ” | awk ‘{print $10}‘)

获取1秒后网口接收与发送的流量

sleep 1 RXnext=$(cat /proc et/dev | grep $eth | tr : ” ” | awk ‘{print $2}’) TXnext=$(cat /proc et/dev | grep $eth | tr : ” ” | awk ‘{print $10}’) clear

获取这1秒钟实际的进出流量

RX=$((${RXnext}-${RXpre})) TX=$((${TXnext}-${TXpre}))

判断接收流量如果大于MB数量级则显示MB单位,否则显示KB数量级

if [[ $RX -lt 1024 ]];then RX=”${RX}B/s” elif [[ $RX -gt 1048576 ]];then RX=$(echo $RX | awk ‘{print $1/1048576 “MB/s”}’) $STATUS=“busy” else RX=$(echo $RX | awk ‘{print $1/1024 “KB/s”}’) fi

判断发送流量如果大于MB数量级则显示MB单位,否则显示KB数量级

if [[ $TX -lt 1024 ]];then TX=”${TX}B/s” elif [[ $TX -gt 1048576 ]];then TX=$(echo $TX | awk ‘{print $1/1048576 “MB/s”}’) else TX=$(echo $TX | awk ‘{print $1/1024 “KB/s”}’) fi

# 打印信息
echo -e "==================================="
echo -e "Welcome to Traffic_Monitor stage"
echo -e "version 1.0"
echo -e "Since 2014.2.26"
echo -e "Created by showerlee"
echo -e "BLOG:

http://www.showerlee.com ”

echo -e "==================================="
echo -e "System: $OS_NAME"
echo -e "Date: `date +%F`"
echo -e "Time: `date +%k:%M:%S`"
echo -e "Port: $1"
echo -e "Status: $STATUS"
echo -e " \t RX \tTX"
echo "------------------------------"
# 打印实时流量
echo -e "$eth \t $RX $TX "
echo "------------------------------"
# 退出信息
echo -e "Press 'Ctrl+C' to exit"

done }

判断执行参数

if [[ -n “$1” ]];then

执行函数

traffic_monitor $1 else echo -e “None parameter,please add system netport after run the script! \nExample: ‘sh traffic_monitor eth0’” fi

#shell-scripting #监控告警 #网络排查