综合实验：LVS+LAMP+NFS+MySQL读写分离

实验环境：12台虚拟机

---

客户端配置

1. 网络配置：仅主机模式1
   cat /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=f297f992-f824-4489-890c-e237ea9c4a9f
DEVICE=ens33
ONBOOT=no
IPADDR=192.168.88.100
PREFIX=24
GATEWAY=192.168.88.254  
DNS1=172.16.23.211

---

路由器配置

用Linux虚拟机模拟

1. 一个仅主机模式1，一个桥接网卡
2. 网络配置

[路由器]$ ip a
#下面是输出
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:e1:fc:ac brd ff:ff:ff:ff:ff:ff
    inet 192.168.88.254/24 brd 192.168.88.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::6a7a:d4a:a7ed:75b5/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: eth1:  mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:e1:fc:b6 brd ff:ff:ff:ff:ff:ff
    inet 172.16.23.254/16 brd 172.16.255.255 scope global noprefixroute eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::9a8a:1c56:7288:a4ca/64 scope link noprefixroute
       valid_lft forever preferred_lft forever

3. 开启ip转发

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

查看

[路由器]$ sysctl -p
net.ipv4.ip_forward = 1

4. 开启SNAT

[路由器]$ iptables -t nat -A POSTROUTING -s 192.168.88.0/24 ! -d 192.168.88.0/24 -j SNAT --to-source 172.16.23.254

---

配置powerDNS

IP: 172.16.23.211

1. 安装包：基于EPEL源

yum install -y pdns pdns-backend-mysql

2. 安装http + php + mariadb

yum -y install httpd  php php-mysql php-mbstring mariadb-server

3. 启动服务

systemctl start httpd
systemctl start mariadb

4. 配置PowerDNS使用mariadb作为后台数据存储

#查找到包含launch= 的行，修改并添加下面的内容
[powerDNS]$ vim /etc/pdns/pdns.conf
#大概在250行
launch=gmysql
gmysql-host=localhost
gmysql-port=3306
gmysql-dbname=powerdns
gmysql-user=powerdns
gmysql-password=123

5. 创建数据库和帐号给powerDNS用

[powerDNS]$ mysql

MariaDB [(none)]> create database powerdns;
MariaDB [(none)]> grant all privileges on powerdns.* to powerdns@localhost identified by "123";

5. 对，又是5

USE powerdns;
CREATE TABLE domains (
  id                    INT AUTO_INCREMENT,
  name                  VARCHAR(255) NOT NULL,
  master                VARCHAR(128) DEFAULT NULL,
  last_check            INT DEFAULT NULL,
  type                  VARCHAR(6) NOT NULL,
  notified_serial       INT DEFAULT NULL,
  account               VARCHAR(40) DEFAULT NULL,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE UNIQUE INDEX name_index ON domains(name);


CREATE TABLE records (
  id                    BIGINT AUTO_INCREMENT,
  domain_id             INT DEFAULT NULL,
  name                  VARCHAR(255) DEFAULT NULL,
  type                  VARCHAR(10) DEFAULT NULL,
  content               VARCHAR(64000) DEFAULT NULL,
  ttl                   INT DEFAULT NULL,
  prio                  INT DEFAULT NULL,
  change_date           INT DEFAULT NULL,
  disabled              TINYINT(1) DEFAULT 0,
  ordername             VARCHAR(255) BINARY DEFAULT NULL,
  auth                  TINYINT(1) DEFAULT 1,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
CREATE INDEX recordorder ON records (domain_id, ordername);


CREATE TABLE supermasters (
  ip                    VARCHAR(64) NOT NULL,
  nameserver            VARCHAR(255) NOT NULL,
  account               VARCHAR(40) NOT NULL,
  PRIMARY KEY (ip, nameserver)
) Engine=InnoDB;


CREATE TABLE comments (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  name                  VARCHAR(255) NOT NULL,
  type                  VARCHAR(10) NOT NULL,
  modified_at           INT NOT NULL,
  account               VARCHAR(40) NOT NULL,
  comment               VARCHAR(64000) NOT NULL,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX comments_domain_id_idx ON comments (domain_id);
CREATE INDEX comments_name_type_idx ON comments (name, type);
CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);


CREATE TABLE domainmetadata (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  kind                  VARCHAR(32),
  content               TEXT,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX domainmetadata_idx ON domainmetadata (domain_id, kind);


CREATE TABLE cryptokeys (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  flags                 INT NOT NULL,
  active                BOOL,
  content               TEXT,
  PRIMARY KEY(id)
) Engine=InnoDB;

CREATE INDEX domainidindex ON cryptokeys(domain_id);


CREATE TABLE tsigkeys (
  id                    INT AUTO_INCREMENT,
  name                  VARCHAR(255),
  algorithm             VARCHAR(50),
  secret                VARCHAR(255),
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);

6. 启动服务

systemctl start pdns
systemctl enable pdns

7. 安装httpd和php相关包

yum -y install  php-devel php-gd php-mcrypt php-imap php-ldap  php-odbc php-pear php-xml php-xmlrpc php-mcrypt php-mhash gettext

8. 启动服务

systemctl restart httpd

9. 下载poweradmin程序，

cd /var/www/html
wget http://downloads.sourceforge.net/project/poweradmin/poweradmin-2.1.7.tgz

10. 解压缩到相应目录

tar xvf poweradmin-2.1.7.tgz
mv poweradmin-2.1.7 poweradmin

设置下权限

setfacl -Rm u:apache:rwx poweradmin

11. 访问下面地址，启动PowerAdmin的网页安装向导：
    http://172.16.23.211/poweradmin/install/
    选英语，下一步。下一步
    

---

提供先前配置的数据库详情，同时为Poweradmin设置管理员密码

---

12. 为Poweradmin创建一个受限用户

标题	说明
Username	PowerAdmin用户名
Password	上述用户的密码
Hostmaster	创建SOA记录指定默认主机管理员
Primary nameserver	主域名服务器
Secondary namesever	辅域名服务器

---

13. 按照下面页面说明，在数据库中创建用户并授权，然后再下一步

示例(根据你自己的)：

[powerDNS]$ mysql

MariaDB [(none)]> GRANT SELECT, INSERT, UPDATE, DELETE ON powerdns.* TO 'poweradmin'@'localhost' IDENTIFIED BY '123';

---

14. 按下面页面说明，修改config.in.php文件内容,注意不要复制我的，不要复制我的，看你自己的
    

[powerDNS]$ mv poweradmin/inc/config-me.inc.php poweradmin/inc/config.inc.php

[powerDNS]$ vim /var/www/html/poweradmin/inc/config.inc.php
 18 $db_host = 'localhost';
 19 $db_port = '3306';
 20 $db_user = 'powerdns';
 21 $db_pass = '123';
 22 $db_name = 'powerdns';
 23 $db_type = 'mysql';
...
 26 $db_layer       = 'PDO';    # or MDB2
...
 30 $session_key = 'gKB$t5Qx%l!%$d+M~T$Hv+lABp$nNKKRe{7v}W3SMO0=kN';
...
 34 $iface_lang = 'en_EN';
...
 43 $dns_hostmaster = 'powerserver';
 44 $dns_ns1 = '192.168.99.101';
 45 $dns_ns2 = '192.168.99.101';

---

15. 安装完毕后，删除install目录

[powerDNS]$ rm -rf /var/www/html/poweradmin/install/

---

16. 登录http://powerdns服务器IP/poweradmin/

username：admin
password：123

这里如果登录不了提示：Error: You have to install PHP mcrypt extension
解决：

vim /etc/httpd/conf.modules.d/10-php.conf
...
  5 
  6   LoadModule php5_module modules/libphp5.so
  7   LoadModule php5_module modules/mcrypt.so
  8 

---

1. 来添加个zone
   

---

2. list zone，准备给这个zone添加记录
   

---

3. 添加A记录，指向172.16.23.200

---

5. 查看，直接search就可以

---

6. 看，这就有条记录了。
   

---

防火墙

外网IP:172.16.23.200
内网IP:192.168.99.101

1. 配置转发

[防火墙]# vim /etc/sysctl.conf 
net.ipv4.ip_forward=1
[防火墙]# sysctl -P

2. 配置DNAT

iptables -t nat -A PREROUTING -d 172.16.23.200 -p tcp --dport 80 -j DNAT --to-destination 192.168.99.100

---

107~109:mysql主从半同步复制

主机：192.168.99.107~109

107~109主机上都安装

1. 直接yum安装吧

yum -y install mariadb-server

2. 启动

systemctl start mariadb
systemctl enable mariadb

主服务器：192.168.99.107

1. 修改配置文件

vim /etc/my.cnf
	[mysqld]
 #加这2条
	server_id=107
	log_bin

2. 重启服务

systemctl restart mariadb

3. 创建帐号用于复制

[主mysql]$ mysql

MariaDB [(none)]> grant replication slave on *.* to repluser@'%' identified by '123';

从服务器1：192.168.99.108

1. 修改配置文件

[从1]$ vim /etc/my.cnf
	[mysqld]
	server_id=108
  read_only

2. 重启服务

systemctl restart mariadb

3. 连接到主服务器

[从1]$ mysql

MariaDB [(none)]> change master to 
master_host='192.168.99.107',
master_user='repluser',
master_password='123',
master_port=3306,
master_log_file='mariadb-bin.000001',
master_log_pos=0;

4. 启动slave

MariaDB [(none)]> start slave ;

5. 查看是否连接上

MariaDB [(none)]> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.99.107
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mariadb-bin.000001
          Read_Master_Log_Pos: 386
               Relay_Log_File: mariadb-relay-bin.000002
                Relay_Log_Pos: 672
        Relay_Master_Log_File: mariadb-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
...

从服务器2：192.168.99.109

1. 修改配置文件

[从2]$ vim /etc/my.cnf
	[mysqld]
	server_id=109
  read_only

2. 重启服务

systemctl restart mariadb

3. 连接到主服务器

[从2]$ mysql

MariaDB [(none)]> change master to 
master_host='192.168.99.107',
master_user='repluser',
master_password='123',
master_port=3306,
master_log_file='mariadb-bin.000001',
master_log_pos=0;

4. 启动slave

MariaDB [(none)]> start slave ;

5. 查看是否启动成功

MariaDB [(none)]> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.99.107
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mariadb-bin.000001
          Read_Master_Log_Pos: 386
               Relay_Log_File: mariadb-relay-bin.000002
                Relay_Log_Pos: 672
        Relay_Master_Log_File: mariadb-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
...

主服务器：192.168.99.107

1. 在主服务器上安装主服务器的插件

MariaDB [(none)]> INSTALL PLUGIN rpl_semi_sync_master SONAME 'semisync_master.so';

2. 启用这个插件

MariaDB [(none)]> set global rpl_semi_sync_master_enabled=on;

从服务器1：192.168.99.108

1. 从服务器安装的插件不太一样，看

MariaDB [(none)]> INSTALL PLUGIN rpl_semi_sync_slave SONAME 'semisync_slave.so';

2. 启用它

MariaDB [(none)]> set global rpl_semi_sync_slave_enabled=on;

3. 设置完还得重启线程

MariaDB [(none)]> stop slave; 

MariaDB [(none)]> start slave; 

从服务器2：192.168.99.109

1. 跟107一样

MariaDB [(none)]> INSTALL PLUGIN rpl_semi_sync_slave SONAME 'semisync_slave.so';

2. 启用它

MariaDB [(none)]> set global rpl_semi_sync_slave_enabled=on;

3. 设置完还得重启线程

MariaDB [(none)]> stop slave; 

MariaDB [(none)]> start slave; 

主服务器：192.168.99.107

1. 回到主服务器上看，已经有2个线程了

MariaDB [(none)]> SHOW GLOBAL STATUS LIKE '%semi%';
+--------------------------------------------+-------+
| Variable_name                              | Value |
+--------------------------------------------+-------+
| Rpl_semi_sync_master_clients               | 2     |
...

2. 给wordpress创建帐号用

MariaDB [(none)]> create database wpdb;
MariaDB [(none)]> grant all privileges on wpdb.* to wpuser@'192.168.99.%' identified by "123";

4. 创建帐号给ProxySQL监控用

MariaDB [(none)]> grant replication client on *.* to monitor@'192.168.99.%' identified by '123';

4. 创建帐号用来ProxySQL访问的(没写错，这里真的还是4)

MariaDB [(none)]> grant all on *.* to sqluser@'%' identified by '123';

---

106:布署ProxySQL

proxySQL：192.168.99.106

1. 安装前还得配置下官方的yum源
   要不就自行下载安装：https://github.com/sysown/proxysql/releases

[106]$ vim /etc/yum.repos.d/proxysql.repo
[proxysql_repo]
name= ProxySQL YUM repository
baseurl=http://repo.proxysql.com/ProxySQL/proxysql-1.4.x/centos/\$releasever
gpgcheck=1
gpgkey=http://repo.proxysql.com/ProxySQL/repo_pub_key

1. 安装proxySQL

yum clean all 

yum install proxysql

3. 启动proxySQL

systemctl start proxysql

4. 登录前你还需要

yum -y install mariadb

5. 登录到proxysql试试

mysql -uadmin -padmin -P6032 -h127.0.0.1

连接成功，简单看看

MySQL [(none)]> show databases;
+-----+---------------+-------------------------------------+
| seq | name          | file                                |
+-----+---------------+-------------------------------------+
| 0   | main          |                                     |
| 2   | disk          | /var/lib/proxysql/proxysql.db       |
| 3   | stats         |                                     |
| 4   | monitor       |                                     |
| 5   | stats_history | /var/lib/proxysql/proxysql_stats.db |
+-----+---------------+-------------------------------------+

7. 添加你的3台MySQL主机

MySQL > insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.99.107',3306);

MySQL > insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.99.108',3306);

MySQL > insert into mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.99.109',3306);

8. 添加上了，可以看看

MySQL > select * from mysql_servers;
+--------------+----------------+------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+
| hostgroup_id | hostname       | port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |
+--------------+----------------+------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+
| 10           | 192.168.99.107 | 3306 | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |
| 20           | 192.168.99.108 | 3306 | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |
| 20           | 192.168.99.109 | 3306 | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |
+--------------+----------------+------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+

9. 当然，这2步少不了。加载并保存到磁盘

MySQL > load mysql servers to runtime;

MySQL > save mysql servers to disk;

10. 添加监控后端节点的用户。

MySQL [(none)]> set mysql-monitor_username='monitor';
MySQL [(none)]> set mysql-monitor_password='123';

11. 加载到RUNTIME，并保存到disk

MySQL [(none)]> load mysql variables to runtime;
MySQL [(none)]> save mysql variables to disk;

12. 查看监控连接是否正常的 (对connect指标的监控)：(如果connect_error的结果为NULL则表示正常,看最后2条)

MySQL [(none)]> select * from mysql_server_connect_log;
+----------------+------+------------------+-------------------------+-------------------------------------------------------------------------+
| hostname       | port | time_start_us    | connect_success_time_us | connect_error                                                           |
+----------------+------+------------------+-------------------------+-------------------------------------------------------------------------+
...
| 192.168.99.107 | 3306 | 1564319683112439 | 3277                    | NULL                                                                    |
| 192.168.99.108 | 3306 | 1564319683641071 | 3359                    | NULL                                                                    |
| 192.168.99.109 | 3306 | 1564319684169766 | 1197                    | NULL                                                                    |
+----------------+------+------------------+-------------------------+-------------------------------------------------------------------------+

13. 也可以查看监控心跳信息 (对ping指标的监控)(如果ping_error的结果为NULL则表示正常)

MySQL> select * from mysql_server_ping_log;

14. 还有其它的，查看read_only和replication_lag的监控日志

MySQL> select * from mysql_server_read_only_log;
MySQL> select * from mysql_server_replication_lag_log;

设置分组信息

15. 需要修改的是main库中的mysql_replication_hostgroups表，该表有3个字段：writer_hostgroup写组，reader_hostgroup读组，comment备注, 指定写组的id为10，读组的id为20

MySQL> insert into mysql_replication_hostgroups values(10,20,"test");

16. 加载到RUNTIME生效并保存

MySQL> load mysql servers to runtime;
MySQL> save mysql servers to disk;

17. Monitor模块监控后端的read_only值，按照read_only的值将节点自动移动到读/写组

MySQL> select hostgroup_id,hostname,port,status,weight from mysql_servers;
+--------------+----------------+------+--------+--------+
| hostgroup_id | hostname       | port | status | weight |
+--------------+----------------+------+--------+--------+
| 10           | 192.168.99.107 | 3306 | ONLINE | 1      |
| 20           | 192.168.99.108 | 3306 | ONLINE | 1      |
| 20           | 192.168.99.109 | 3306 | ONLINE | 1      |
+--------------+----------------+------+--------+--------+

18. 在ProxySQL配置，将用户sqluser添加到mysql_users表中， default_hostgroup默认组设置为写组10，当读写分离的路由规则不符合时，会访问默认组的数据库

MySQL> insert into mysql_users(username,password,default_hostgroup) values('sqluser','123',10);

MySQL> insert into mysql_users(username,password,default_hostgroup) values('wpuser','123',10);

19. 保存生效

MySQL> load mysql users to runtime;
MySQL> save mysql users to disk;

20. 使用sqluser用户测试是否能路由到默认的10写组实现读、写数据。是的，我的写组就是主服务器，也就是server_id=2的主机。

[proxySQL]$ mysql -usqluser -p123 -P6033 -h127.0.0.1 -e 'select @@server_id'
+-------------+
| @@server_id |
+-------------+
|         106 |
+-------------+

在proxysql上配置路由规则，实现读写分离

与规则有关的表：mysql_query_rules和mysql_query_rules_fast_routing，后者是前者的扩展表，1.4.7之后支持
插入路由规则：将select语句分离到20的读组，select语句中有一个特殊语句SELECT…FOR UPDATE它会申请写锁，应路由到10的写组

22. 可以这样写

#先进入
[proxySQL]$ mysql -uadmin -padmin -P6032 -h127.0.0.1

MySQL> insert into mysql_query_rules
(rule_id,active,match_digest,destination_hostgroup,apply)VALUES
(1,1,'^SELECT.*FOR UPDATE$',10,1),(2,1,'^SELECT',20,1);

23. 保存生效

MySQL> load mysql query rules to runtime;
MySQL> save mysql query rules to disk;

注意：因ProxySQL根据rule_id顺序进行规则匹配，select … for update规则的rule_id必须要小于普通的select规则的rule_id

24. 看下生效了没，已经有了2条记录了

MySQL [(none)]> select rule_id,active,match_digest,destination_hostgroup,apply from mysql_query_rules;
+---------+--------+----------------------+-----------------------+-------+
| rule_id | active | match_digest         | destination_hostgroup | apply |
+---------+--------+----------------------+-----------------------+-------+
| 1       | 1      | ^SELECT.*FOR UPDATE$ | 10                    | 1     |
| 2       | 1      | ^SELECT              | 20                    | 1     |
+---------+--------+----------------------+-----------------------+-------+

到这里就可以实现读写分离了

在这里强调下：
(1)进入proxySQL管理界面是：mysql -uadmin -padmin -P6032 -h127.0.0.1，端口号是：6032，默认的帐号密码是admin和admin。
(2)如果使用mysql -usqluser -p123 -P6033 -h127.0.0.1则访问的是主服务器上的数据库了。

---

105:NFS配置

主机：192.168.99.105

1. 安装

[NFS]$ yum install -y nfs-utils

2. 配置

[NFS]$ mkdir /data/wordpress

[NFS]$ vim /etc/exports
/data/wordpress 192.168.99.0/24(rw,all_squash,anonuid=997,anongid=995)

#加载
[NFS]$ exportfs -r

3. 启动服务

[NFS]$ systemctl restart nfs-server

4. 创建用户

[NFS]$ groupadd -g 995 apache
[NFS]$ useradd -r -u 997 -g 995 -s /sbin/nologin apache

---

105:布署wordpress

192.168.99.105

这是在NFS服务器

1. 下载

[NFS]$ cd
[NFS]$ wget ftp://192.168.99.1/Magedu37/files/lamp/wordpress-5.0.3-zh_CN.tar.gz

2. 解压

[NFS]$ tar xf wordpress-5.0.3-zh_CN.tar.gz -C /data/

3. 删除包

[NFS]$ rm -f wordpress-5.0.3-zh_CN.tar.gz
[NFS]$ chown -R apache.apache /data/wordpress/

---

104:webB安装apache+php

主机：192.168.99.104

1. 在主机104上安装php和httpd

[http]$ yum -y install php httpd php-mysql php-mbstring

2. 修改配置文件

[http]$ vim /etc/httpd/conf.d/test.conf


    documentroot /data/wordpress
    servername blog.jibill.com
    
        require all granted
    

3. 重启服务

[http]$ systemctl restart httpd

4. 安装nfs-utils准备挂载nfs

[http]$ yum -y install nfs-utils
[http]$ mkdir /data/wordpress 
[http]$ mount 192.168.99.105:/data/wordpress /data/wordpress

7. 来测试下。注意下方多图预警
   先用hosts文件添加192.168.99.104测试,
   可以修改hosts文件

vim /etc/hosts
  192.168.99.104 blog.jibill.com

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103:webA安装apache+php

主机：192.168.99.103

1. 在主机103上安装php和httpd

[httpA]$ yum -y install php httpd php-mysql php-mbstring

2. 修改配置文件

[httpA]$ vim /etc/httpd/conf.d/test.conf


    documentroot /data/wordpress
    servername blog.jibill.com
    
        require all granted
    

3. 重启服务

[httpA]$ systemctl restart httpd

4. 安装nfs-utils准备挂载nfs

[httpA]$ yum -y install nfs-utils
[httpA]$ mkdir /data/wordpress 
[httpA]$ mount 192.168.99.105:/data/wordpress /data/wordpress

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LVS实现web服务的负载均衡

0. 设置路由

[LVS]$ ip route del default via 192.168.99.2

[LVS]$ ip route add default via 192.168.99.101

1. 安装ipvsadm

[LVS]$ yum -y install ipvsadm

2. 设置回环网卡地址

[LVS]$ ip a a 192.168.99.100 dev lo

3. 配置LVS

[LVS]$ ipvsadm -A -t 192.168.99.100:80 -s wrr

[LVS]$ ipvsadm -a -t 192.168.99.100:80 -r 192.168.99.103 -g -w 1

[LVS]$ ipvsadm -a -t 192.168.99.100:80 -r 192.168.99.104 -g -w 1

下面2个设置在webA和webB上都要配置
4. 设置webA和webB的路由和arp设置

ip route del default via 192.168.99.2
ip route add default via 192.168.99.101

5. 配置103和104(web服务A和B)，记得，2个主机都要这么配

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
ip a a 192.168.99.100 dev lo

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192.168.88.100

1. 访问blog.jibill.com/成功