通过脚本配置腾讯云弹性网卡

#!/bin/bash
# encoding=utf8
# 2023.4.17
# debug
#set -x

# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH


# get ip
get_ip(){
	IPADDR="127.0.0.1"
	DEFAULT=$1
	if [ x"$DEFAULT" == "x" ];then
		DEFAULT=eth0
	fi

	ifconfig $DEFAULT 2>&1 > /dev/null
	if [ $? -eq 0 ];then
		IPADDR=`ifconfig $DEFAULT 2> /dev/null | grep inet | grep -v inet6 | awk '{print $2}'` 
	fi
	echo $IPADDR
}


# format system_name
get_system_os(){
	SYSTEM_OS="No supported system"

	if [ -e /etc/issue ];then
		cat /etc/issue  | grep -E "Ubuntu (22|20|18|16|14)" 2>&1 > /dev/null 
		if [ $? -eq 0 ];then
			SYSTEM_OS="ubuntu"
			echo $SYSTEM_OS
			exit 0 
		fi
		
	fi


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

		cat /etc/redhat-release  | grep -E "CentOS Stream release (9|8)" 2>&1 > /dev/null 
		if [ $? -eq 0 ];then
			SYSTEM_OS="centos_stream_release_9_8"
			echo $SYSTEM_OS
			exit 0 
		fi
		
		cat /etc/redhat-release   | grep -E "CentOS Linux release 8.(0|2|3|4)" 2>&1 > /dev/null
		if [ $? -eq 0 ];then
			SYSTEM_OS="CentOS_Linux_release_8_0_4"
			echo $SYSTEM_OS
			exit 0
		fi
		cat /etc/redhat-release  | grep -E "CentOS Linux release 7.(5|6|7|8|9)" 2>&1 > /dev/null	
		if [ $? -eq 0 ];then
			SYSTEM_OS="CentOS_Linux_release_5_9"
			echo $SYSTEM_OS
			exit 0
		fi

		cat /etc/redhat-release  | grep -E "TencentOS Server release (3.1|2.4|2.6|2.2|1.2)" 2>&1 > /dev/null	
		if [ $? -eq 0 ];then
			SYSTEM_OS="TencentOS_release_3_1_2_2"
			echo $SYSTEM_OS
			exit 0
		fi
		
		cat /etc/redhat-release  | grep "OpenCloudOS release 8.6" 2>&1 > /dev/null	
		if [ $? -eq 0 ];then
			SYSTEM_OS="opencloudos_release"
			echo $SYSTEM_OS
			exit 0
		fi
	fi

	echo $SYSTEM_OS
	exit 1
}


# INPUT
ENI=$1
IPADDRES=$2
STORAGE=$3

if [ -z "$ENI" ] || [ -z "$IPADDRES" ];then
echo "Usages: Ethernet(eth1、eth0) ipddress(ipv4) storage 
pre-work:
chmod +x enc_set.sh
doc:https://cloud.tencent.com/document/product/576/18535
example:
./enc_set.sh eth1 192.168.1.7  # 设置辅助网卡主IP 
./enc_set.sh eth1 192.168.1.8  # 设置辅助网卡辅助IP
./enc_set.sh eth0 192.168.1.10  # 设置主网卡辅助IP
./enc_set.sh eth0 192.168.1.10  true # 写入rc.local 重启服务器时依然配置依然生效

"
	exit 1
fi

# Check Param
ifconfig $ENI 2>&1 > /dev/null 
if [ $? -ne 0 ];then
	echo "Ethernet "$ENI" not exists!"
	exit 1
fi

echo $IPADDRES | egrep -oE "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}" 2>&1 > /dev/null
if [ $? -ne 0 ];then
	echo "Your ip address format $IPADDRES error"
	exit 1
fi

# Check ENV
system_os=`get_system_os`

if [ "$system_os" == "No supported system" ];then
	echo "No supported system OS"
	exit 1
fi

# Set ETH 
ip address show $ENI | grep $IPADDRES 2>&1 > /dev/null
if [ $? -ne 0 ];then
	ip addr add $IPADDRES dev $ENI 
fi

ip address show $ENI  | grep DOWN 2>&1 > /dev/null			
if [ $? -eq 0 ];then
	ifconfig $ENI up 
fi

# CentOS set route rule
supportsystem_os_array=(centos_stream_release_9_8 CentOS_Linux_release_8_0_4 CentOS_Linux_release_5_9 TencentOS_release_3_1_2_2 opencloudos_release ubuntu)

for (( i = 0 ; i < ${#supportsystem_os_array[@]} ; i++ )) do

	if [ $system_os == ${supportsystem_os_array[$i]} ];then 


		if [ $ENI != "eth0" ];then
			# ======= 设置辅助网卡主IP路由 ========

			# 判断是否为主IP 
			if [ $IPADDRES == `get_ip "$ENI"` ];then
				# 设置默认路由
				ip route add default dev eth1 via $IPADDRES table 20 2> /dev/null
				# 设置回报
				ip rule add from $IPADDRES table 20 2> /dev/null
				
				echo "runCommand:ip route add default dev eth1 via $IPADDRES table 20"
				echo "runCommand:ip rule add from $IPADDRES table 20"
				
				if [ x"$STORAGE" != "x" ];then
					[ -e /etc/rc.local ] && echo "/sbin/ip route add default dev eth1 via $IPADDRES table 20 2>&1 > /dev/null" >> /etc/rc.local 
					[ -e /etc/rc.local ] && echo "/sbin/ip rule add from $IPADDRES table 20 2>&1 > /dev/null" >> /etc/rc.local
				fi

			else
			# ======= 设置辅助网卡辅助IP路由 ========
				ip rule add from $IPADDRES table 20  

				echo "runCommand:ip rule add from $IPADDRES table 20"

				if [ x"$STORAGE" != "x" ];then
					[ -e /etc/rc.local ] && echo "/sbin/ip rule add from $IPADDRES table 20 2>&1 > /dev/null" >> /etc/rc.local
				fi 
			fi

		else
			# ======= 设置主网卡辅助IP路由 ========
			ip rule add from $IPADDRES table 10 
			ip route add default dev eth0 via $IPADDRES table 10 2> /dev/null

			echo "runCommand:ip rule add from $IPADDRES table 10"			
			echo "runCommand:ip route add default dev eth0 via $IPADDRES table 10"			

			if [ x"$STORAGE" != "x" ];then
				[ -e /etc/rc.local ] && echo "/sbin/ip rule add from $IPADDRES table 10 2>&1 > /dev/null" >> /etc/rc.local
				[ -e /etc/rc.local ] && echo "/sbin/ip route add default dev eth0 via $IPADDRES table 10 2>&1 > /dev/null" >> /etc/rc.local
			fi
		fi
	fi
done 

echo "Success..."
exit 0