LVS-TUN隧道模式

当然可以。以下是按照您的要求整理的表格形式的实验手册：

主机名称	网卡信息	安装应用	系统
Client客户端	192.168.2.101	无	RHEL8/CentOS8
Lvs服务器（DR）	DIP:192.168.2.110 VIP:192.168.40.111	ipvsadm	RHEL8/CentOS8
RS1	RIP:192.168.2.111	httpd	RHEL8/CentOS8
RS2	RIP:192.168.2.112	httpd	RHEL8/CentOS8

这里的每个主机都有其特定的功能和配置：

• Client客户端：用于发起请求。
• Lvs服务器（DR）：作为负载均衡器，负责接收和分发流量。
• RS1 和 RS2：作为真实服务器，处理来自负载均衡器的请求。

负载均衡器 (LB)

1. 保存 IPVS 配置:

   ipvsadm --save > /etc/sysconfig/ipvsadm
   

2. 启用 IP 转发:

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

3. 配置 TUN 接口:

   ifconfig tunl0 192.168.2.200 broadcast 192.168.2.200 netmask 255.255.255.255 up
   

4. 创建虚拟服务器并设置轮询调度:

   ipvsadm -A -t 192.168.2.200:80 -s rr
   

5. 添加真实服务器:

   ipvsadm -a -t 192.168.2.200:80 -r 192.168.2.111:80 -i
   ipvsadm -a -t 192.168.2.200:80 -r 192.168.2.112:80 -i
   

6. 禁用防火墙与 SELinux:

   systemctl stop firewalld.service
   setenforce 0
   

7. 验证 IPVS 配置:

   ipvsadm -ln
   

真实服务器 1 (RS1)

1. 启动 HTTP 服务:

   systemctl start httpd
   

2. 禁用 SELinux 和防火墙:

   setenforce 0
   systemctl stop firewalld.service
   

3. 配置网站内容:

   echo "this is web1" >> /var/www/html/index.html
   

4. 测试网站:

   curl 127.0.0.1
   

5. 配置 TUN 接口:

   ifconfig tunl0 192.168.2.200 broadcast 192.168.2.200 netmask 255.255.255.255 up
   

6. 调整 sysctl 设置:

   echo "net.ipv4.conf.tunl0.arp_ignore = 1" >> /etc/sysctl.conf
   echo "net.ipv4.conf.tunl0.arp_announce = 2" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.arp_ignore = 1" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.arp_announce = 2" >> /etc/sysctl.conf
   echo "net.ipv4.conf.tunl0.rp_filter = 0" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.rp_filter = 0" >> /etc/sysctl.conf
   sysctl -p
   

真实服务器 2 (RS2)

1. 启动 HTTP 服务:

   systemctl start httpd
   

2. 禁用 SELinux 和防火墙:

   setenforce 0
   systemctl stop firewalld.service
   

3. 配置网站内容:

   echo "this is web2" >> /var/www/html/index.html
   

4. 测试网站:

   curl 127.0.0.1
   

5. 配置 TUN 接口:

   ifconfig tunl0 192.168.2.200 broadcast 192.168.2.200 netmask 255.255.255.255 up
   

6. 调整 sysctl 设置:

   echo "net.ipv4.conf.tunl0.arp_ignore = 1" >> /etc/sysctl.conf
   echo "net.ipv4.conf.tunl0.arp_announce = 2" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.arp_ignore = 1" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.arp_announce = 2" >> /etc/sysctl.conf
   echo "net.ipv4.conf.tunl0.rp_filter = 0" >> /etc/sysctl.conf
   echo "net.ipv4.conf.all.rp_filter = 0" >> /etc/sysctl.conf
   sysctl -p
   

测试

• 测试负载均衡器:

  curl 192.168.2.200
  

  [root@localhost ~]# curl 192.168.2.200
  this is web2
  [root@localhost ~]# curl 192.168.2.200
  this is web1
  [root@localhost ~]# curl 192.168.2.200
  this is web2
  [root@localhost ~]# curl 192.168.2.200
  this is web1
  [root@localhost ~]# curl 192.168.2.200
  this is web2
  [root@localhost ~]# curl 192.168.2.200
  this is web1
  [root@localhost ~]# curl 192.168.2.200
  this is web2
  [root@localhost ~]# curl 192.168.2.200
  this is web1