LVS—NAT配置

环境准备

LVS：192.168.192.139
RS1：192.168.192.137
RS2：192.168.192.138

LVS-NAT模式配置

1. 首先对三台机器进行时间同步配置（集群中机器的时间差最好不要超过1s）及关闭防火墙、selinux

    yum install ntpdate -y
    ntpdate cn.pool.ntp.org
    hwclock --systohc
    systemctl stop firewalld.service
    setenforce 0
   

2. NAT配置

   • 安装LVS

         [root@lvs ~]# yum install ipvsadm.x86_64 -y
     

   • 设置LVS的VIP

     [root@lvs ~]# ifconfig  eth0:0 192.168.192.122 netmask 255.255.255.255
     [root@lvs ~]# route add -host 192.168.192.122 dev eth0:0
     [root@lvs ~]# ip a
     

     

   • 开启路由转发

     [root@lvs ~]# cat /proc/sys/net/ipv4/ip_forward
     [root@lvs ~]# echo 1 >  /proc/sys/net/ipv4/ip_forward
     [root@lvs ~]# cat /proc/sys/net/ipv4/ip_forward
     

     

   • 配置NAT负载均衡服务

     [root@lvs ~]# ipvsadm -At 192.168.192.122:80 -s rr
     [root@lvs ~]# ipvsadm -at 192.168.192.122:80 -r192.168.192.137:80 -m
     [root@lvs ~]# ipvsadm -at 192.168.192.122:80 -r192.168.192.138:80 -m
     [root@lvs ~]# ipvsadm -Ln
     

     

3. RS节点配置

   • RS2节点配置

     [root@rs1 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
     BOOTPROTO=static
     IPADDR=192.168.192.137
     GATEWAY=192.168.192.139  #将网关改成LVS的IP地址
     PREFIX=24
     DEVICE=eth0
     ONBOOT=yes
     
     [root@rs1~]# yum install httpd.x86_64 -y
     [root@rs1~]# echo "web 137" > /var/www/html/index.html
     [root@rs1~]# systemctl start httpd.service
     

     

   • RS2节点配置

     [root@rs2 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
     BOOTPROTO=static
     IPADDR=192.168.192.138
     GATEWAY=192.168.192.139  #将网关改成LVS的IP地址
     PREFIX=24
     DEVICE=eth0
     ONBOOT=yes
     
     [root@rs2~]# yum install httpd.x86_64 -y
     [root@rs2~]# echo "web 138" > /var/www/html/index.html
     [root@rs2~]# systemctl start httpd.service
     

4.测试