LVS_DR

  

使用DR模型的FWM类型的lvs服务负载均衡一个php应用,如Discuz!论坛或者phpMyAdmin;

  前提条件:三台主机(一台调度器,两台服务器即RS)

  声明:调度器配置一个网络接口

       主接口地址:172.16.1.11/16(DIP)

       主接口标签地址:172.16.1.254/32(VIP)

       # ifconfig ens33:0 172.16.1.254 netmask 255.255.255.255 broadcast 172.16.1.254 up

     RS1:

      主接口:172.16.1.12/16

                   环回接口的标签接口:172.16.1.254/32 

                     # ifconfig lo:0 172.16.1.254 netmask 255.255.255.255 broadcast 172.16.1.254 up

               RS2:

      主接口:172.16.1.13/16

                   环回接口的标签接口:172.16.1.254/32

                    # ifconfig lo:0 172.16.1.254 netmask 255.255.255.255 broadcast 172.16.1.254 up

    配置:

     RS1:内核参数的配置:

         # echo 1 > /proc/sys/net/ipv4/conf/all/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/lo/arp_announce

     配置LAMP服务:

       前提:安装LAMP所需组件:

         # yum install httpd php php-mysql mariadb-server

       创建虚拟主机:

         # cd /etc/httpd/conf.d/

         # vim vhost1.conf

         <VirtualHost 172.16.1.12:80>
           ServerName  www.ytc.com
             DocumentRoot "/myweb/vhost1"
             DirectoryIndex index.php
             <Directory "/myweb/vhost1">
              Options None
              AllowOverride None
              Require all granted
           </Directory>
          </VirtualHost>

       完善虚拟主机所需目录要求:

         # mkdir -pv /myweb/vhost1

         # cd /myweb/vhost1

         # vim index.php (做测试页面)

          Real Server 1 <br>
          <?php
              phpinfo();
          ?>

       将phpmyadmin包传送到该目录并解压

          # tsr xf  phpMyAdmin-3.5.4-all-languages.tar.gz

       注意iptables和SELinux的干扰:

          # iptables -F

          # setenforce 0



      RS2:内核参数的配置:

         # echo 1 > /proc/sys/net/ipv4/conf/all/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/lo/arp_announce

     配置LAMP服务:

       前提:安装LAMP所需组件:

         # yum install httpd php php-mysql mariadb-server

       创建虚拟主机:

         # cd /etc/httpd/conf.d/

         # vim vhost1.conf

         <VirtualHost 172.16.1.13:80>
           ServerName  www.ytc.org
             DocumentRoot "/myweb/vhost2"
             DirectoryIndex index.php
             <Directory "/myweb/vhost2">
              Options None
              AllowOverride None
              Require all granted
           </Directory>
          </VirtualHost>

       完善虚拟主机所需目录要求:

         # mkdir -pv /myweb/vhost2

         # cd /myweb/vhost2

         # vim index.php (做测试页面)

          Real Server 2 <br>
          <?php
              phpinfo();
          ?>

       将wordpress包传送到该目录并解压

          # tsr xf  wordpress-4.2-zh_CN.tar.gz

       注意iptables和SELinux的干扰:

          # iptables -F

          # setenforce 0

      调度器配置:

         给数据报文打标记;

          # iptables -t mangle -A PREROUTING -d 172.16.1.254 -p tcp --dport 80 -j MARK --set-mark 10
       创建集群:

            # ipvsadm -A -f 10 -s wrr
       向集群中添加RS:

          # ipvsadm -a -f 10 -r 172.16.1.12 -g -w 2

          # ipvsadm -a -f 10 -r 172.16.1.13 -g -w 2

        web端测试:

          输入172.16.1.254/index.php     

         LVS_DR_LVS

                        第三次输入172.16.1.254:

                         LVS_DR_DR_02

                        然后做长连接和数据库共享(上一篇博客中,这里不再赘述)

                        web端测试:172.16.1.254/wordpress/index.php

                        LVS_DR_DR_03

                        创建数据库授权用户后,登录:

                          LVS_DR_LVS_04

                            完成;