四月学习之LVS shell脚本配置DR模型

1、DS脚本配置

#!/usr/bin/bash
VIP=172.16.1.100
RS1=172.16.1.5
RS2=172.16.1.6
PORT=80
SCHEDULER=rr
DEV=eth1:1

case $1 in
    start)
    # 配置虚拟IP地址  VIP
	cat  >/etc/sysconfig/network-scripts/ifcfg-${DEV} <<-EOF
	TYPE=Ethernet
	BOOTPROTO=none
	DEFROUTE=yes
	NAME=${DEV}
	DEVICE=${DEV}
	ONBOOT=yes
	IPADDR=${VIP}
	PREFIX=24
	EOF

	# 启动网卡
	ifup ${DEV}

	# 配置LVS规则
	ipvsadm -C
	ipvsadm -A -t ${VIP}:${PORT} -s ${SCHEDULER}
	ipvsadm -a -t ${VIP}:${PORT} -r ${RS1} -g
	ipvsadm -a -t ${VIP}:${PORT} -r ${RS2} -g
	;;

	stop)
	    ifdown ${DEV}
	    rm -f /etc/sysconfig/network-scripts/ifcfg-${DEV}
	    ipvsadm -C
	   ;;
	*)
		echo "Usage: sh $0 { start | stop }"
	;;
esac

2、RS脚本配置

#!/usr/bin/bash

VIP=172.16.1.100
DEV=lo:0

case $1 in
    start)
    # ARP抑制
	echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
	echo "1" >/proc/sys/net/ipv4/conf/default/arp_ignore
	echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore

	echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
	echo "2" >/proc/sys/net/ipv4/conf/default/arp_announce
	echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce

	# VIP
	cat  >/etc/sysconfig/network-scripts/ifcfg-${DEV} <<-EOF
	DEVICE=lo:0
	IPADDR=${VIP}
	NETMASK=255.0.0.0
	ONBOOT=yes
	NAME=loopback
	EOF
	
	ifup ${DEV}	# 启动网卡
	systemctl start nginx
    ;;
    
    
    stop)
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/default/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
    
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
    echo "0" >/proc/sys/net/ipv4/conf/default/arp_announce
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce

        ifdown ${DEV}  # 停止网卡
        rm -f /etc/sysconfig/network-scripts/ifcfg-${DEV}
        systemctl stop nginx
        ;;
    *)
        echo "Usage: sh $0 { start | stop }"
esac