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LVS TUN隧道模式

news 2025/9/26 11:08:01

虚拟机	虚拟机IP
VIP ens37	192.168.146.200
LVS	192.168.146.100
真实主机1	192.168.146.101
真实主机2	192.168.146.102
客户端client	192.168.146.102

一、配置LVS负载均衡器（Director）

1.安装软件

apt install -y ipvsadm

2.加载IP隧道模块

modprobe ipip

echo "ipip" >> /etc/modules-load.d/ipvs.conf

3.添加VIP(虚拟)

ip addr add 192.168.146.200/32 dev tunl0

4.配置LVS规则

①清楚现有规则

ipvsadm -A -t 192.168.146.200:80 -s rr

②添加后端真实服务器（TUN模式）

ipvsadm -a -t 192.168.146.200:80 -r 192.168.146.101:80 -i

ipvsadm -a -t 192.168.146.200:80 -r 192.168.146.102:80 -i

③保存配置

ipvsadm -S > /etc/sysconfig/ipvsadm

5.配置系统参数

①启用IP转发

echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf

②禁用IPMP重定向

echo "net.ipv4.conf.all.send_redirects = 0" >> /etc/sysctl.conf
echo "net.ipv4.conf.default.send_redirects = 0" >> /etc/sysctl.conf
echo "net.ipv4.conf.ens33.send_redirects = 0" >> /etc/sysctl.conf

③应用配置

sysctl -p

6.设置开机自启

systemctl enable ipvsadm

systemctl start ipvsadm

二、配置后端Web服务器（Rs1、Rs2相同操作）

1.安装apache2

apt install apache2 -y

2.创建测试页面

在192.168.146.101上

echo "<h1>Web Server 1 (192.168.146.101)</h1>" > /var/www/html/index.html

在192.168.146.102上

echo "<h2>Web Server 2 (192.168.146.102)</h2>" > /var/www/html/index.html

3.加载IP隧道模块

modprobe ipip

echo "ipip" >> /etc/modules-load.d/ipvs.conf

4.配置VIP

①添加VIP到tunl0接口
ip addr add 192.168.146.200/32 dev tunl0
②启用tunl0接口
ip link set dev tunl0 up
③关闭tunl0的ARP响应
echo "1" > /proc/sys/net/ipv4/conf/tunl0/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/tunl0/arp_announce
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
配置系统参数

④ 禁用反向路径过滤
echo "net.ipv4.conf.all.rp_filter = 0" >> /etc/sysctl.conf
echo "net.ipv4.conf.default.rp_filter = 0" >> /etc/sysctl.conf
echo "net.ipv4.conf.tunl0.rp_filter = 0" >> /etc/sysctl.conf
echo "net.ipv4.conf.ens33.rp_filter = 0" >> /etc/sysctl.conf

⑤应用配置
sysctl -p