| 系统 | IP |
| redhat 8 DR | 192.168.100.131 vip：192.168.100.100 |
| redhat 8 RS1 | 192.168.100.132 vip：192.168.100.100 |
| redhat 8 RS2 | 192.168.100.133 vip：192.168.100.100 |
//安装ipvsadm [root@DR ~]# dnf -y install ipvsadm [root@RS1 ~]# dnf -y install ipvsadm [root@RS2 ~]# dnf -y install ipvsadm //RS1.RS2安装httpd #dnf -y install httpd //RS1.RS2.DR关闭防火墙和selinux #systemctl stop firewalld #setenforce 0 //RS1.RS2设置开机自启并立即启动httpd #systemctl enable --now httpd //创建测试页(如果想直观查看测试结果可以做这一步，否则可以跳过) [root@RS1 ~]# echo "RS1" > /var/www/html/index.html [root@RS2 ~]# echo "RS2" > /var/www/html/index.html
[root@DR ~]# ip addr add 192.168.100.100/32 dev ens160
//这条两台RS机器都做 yum -y install httpd net-tools
//RS1 [root@RS1 ~]# vim /etc/sysctl.conf // 在最后面插入如下两行 net.ipv4.conf.all.arp_ignore = 1 // 将对应网卡设置为只回应目标IP为自身接口地址的ARP请求 net.ipv4.conf.all.arp_announce = 2 // 将ARP请求的源IP设置为eth0上的IP，也就是RIP [root@RS1 ~]# sysctl -p net.ipv4.conf.all.arp_ignore = 1 net.ipv4.conf.all.arp_announce = 2 //RS2 [root@RS2 ~]# vim /etc/sysctl.conf // 在最后面插入如下两行 net.ipv4.conf.all.arp_ignore = 1 net.ipv4.conf.all.arp_announce = 2 [root@RS2 ~]# sysctl -p net.ipv4.conf.all.arp_ignore = 1 net.ipv4.conf.all.arp_announce = 2
一定要先设置好内核参数在配置VIP，如果先配置VIP，VIP配置好后会立即通告给所有人，而修改内核参数就是为了不通告
//Rs1 [root@RS1 ~]# ip addr add 192.168.100.100/32 dev lo //Rs2 [root@RS1 ~]# ip addr add 192.168.100.100/32 dev lo
//RS1 [root@RS1 ~]# route add -host 192.168.100.100/32 dev lo [root@RS1 ~]# echo "192.168.100.100/32 via 0.0.0.0 dev lo" > /etc/sysconfig/network-scripts/route-lo [root@RS1 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.100.254 0.0.0.0 UG 100 0 0 ens160 192.168.100.0 0.0.0.0 255.255.255.0 U 100 0 0 ens160 192.168.100.100 0.0.0.0 255.255.255.255 UH 0 0 0 lo //RS2 [root@RS2 ~]# route add -host 192.168.100.100/32 dev lo [root@RS2 ~]# echo ‘192.168.100.100/32 via 0.0.0.0 dev lo‘ > /etc/sysconfig/network-scripts/route-lo [root@RS2 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.100.254 0.0.0.0 UG 100 0 0 ens160 192.168.100.0 0.0.0.0 255.255.255.0 U 100 0 0 ens160 192.168.100.100 0.0.0.0 255.255.255.255 UH 0 0 0 lo
//DR [root@DR network-scripts]# ipvsadm -A -t 192.168.100.100:80 -s wrr [root@DR network-scripts]# ipvsadm -a -t 192.168.100.100:80 -r 192.168.100.132 -g [root@DR network-scripts]# ipvsadm -a -t 192.168.100.100:80 -r 192.168.100.133 -g [root@DR network-scripts]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.100.100:80 wrr -> 192.168.100.132:80 Route 1 0 0 -> 192.168.100.133:80 Route 1 0 0 [root@DR network-scripts]# ipvsadm -S > /etc/sysconfig/ipvsadm [root@DR network-scripts]# systemctl enable --now ipvsadm
[root@DR network-scripts]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.100.100:80 wrr -> 192.168.100.132:80 Route 1 4 1 -> 192.168.100.133:80 Route 1 1 1
原文：https://www.cnblogs.com/lichouluoyu/p/14742534.html