如何保证2站点或多站点在负载均衡下站点内容保持一致呢？

[root@zhdy-03 ~]# cd /data/wwwroot/www.zhdy03.com/
[root@zhdy-03 www.zhdy03.com]# ls

# yum install -y nfs-utils rpcbind
 
# vim /etc/exports

写入如下内容：

/data/wwwroot/www.discuz.com/  192.168.230.0/24(rw,sync,all_squash,anonuid=1040,anongid=1040)

---------------------

# systemctl restart nfs

# sudo chmod 777 /data/wwwroot/www.zhdy04.com/

# showmount -e 192.168.230.150
Export list for 192.168.230.150:
/data/wwwroot/www.zhdy04.com 192.168.230.0/24

# mount -t nfs 192.168.230.150:/data/wwwroot/www.zhdy04.com/ /data/wwwroot/www.zhdy03.com/

# df -h
Filesystem                                    Size  Used Avail Use% Mounted on
/dev/mapper/cl-root                            30G  6.2G   24G  21% /
devtmpfs                                      473M     0  473M   0% /dev
tmpfs                                         489M     0  489M   0% /dev/shm
tmpfs                                         489M  7.1M  482M   2% /run
tmpfs                                         489M     0  489M   0% /sys/fs/cgroup
/dev/sda1                                     473M  165M  309M  35% /boot
/dev/mapper/cl-var                            9.4G  1.4G  8.0G  15% /var
/dev/mapper/cl-home                           7.5G   37M  7.5G   1% /home
tmpfs                                          98M     0   98M   0% /run/user/0
192.168.230.150:/data/wwwroot/www.zhdy04.com   30G  6.3G   24G  21% /data/wwwroot/www.zhdy03.com

# ls
admin.php  api.php   config       crossdomain.xml  favicon.ico  group.php  index.php  member.php  plugin.php  robots.txt  source  template   uc_server
api        archiver  connect.php  data             forum.php    home.php   install    misc.php    portal.php  search.php  static  uc_client

##之前我们已经授权了当前站点（WEB 1）可以访问本机数据库，下面我们需要授权（WEB 2同理也需要可以访问）

##WEB 1 ：

mysql> create database discuz;
Query OK, 1 row affected (0.04 sec)

mysql> grant all on discuz.* to 'discuz'@'192.168.230.150' identified by 'zhangduanya';
Query OK, 0 rows affected (0.06 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

##WEB 2 :

mysql> grant all on discuz.* to 'discuz'@'192.168.230.151' identified by 'zhangduanya';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)