[root@host61 ~]# vim /etc/my.cnf
[mysqld]
Server_id = 61
log_bin=master61
:wq
[root@host61 ~]# systemctl restart mysqld
[root@host61 ~]# mysql -uroot –p123qqq...A
Mysql>   grant replication slave on  *.* to repluser@"%" identified by "123qqq...A";
Mysql>  show  master status ;
+-----------------+----------+--------------+------------------+-------------------+
| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-----------------+----------+--------------+------------------+-------------------+
| master61.000001 |      441 |              |                  |                   |
+-----------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

[root@host62 ~]# vim /etc/my.cnf
[mysqld]
Server_id = 62
:wq
[root@host62 ~]# systemctl  restart  mysqld
[root@host62 ~]# mysql -uroot -p密碼
Mysql> change master to  master_host="192.168.88.61" ,
Master_user="repluser" ,  
Master_password="123qqq...A" ,
Master_log_file="master61.000001" ,
Master_log_pos=441 ;
Mysql>  start  slave;
Mysql> show  slave status \G
             Slave_IO_Running: Yes
             Slave_SQL_Running: Yes

[root@host60 ~]# yum -y install maxscale-2.1.2-1.rhel.7.x86_64.rpm  

[root@host60 ~]# cp /etc/maxscale.cnf /root/  備份主配置文件
[root@host60 ~]# vim /etc/maxscale.cnf
[maxscale]
threads=auto # 服務啟動后線程的數(shù)量,根據(jù)CPU 核數(shù)創(chuàng)建
[server1]    
type=server
address=192.168.88.61 # 指定第1臺數(shù)據(jù)庫服務器的ip地址
port=3306
protocol=MySQLBackend
[server2]   
type=server
address=192.168.88.62 # 指定第2臺數(shù)據(jù)庫服務器的ip地址
port=3306
protocol=MySQLBackend
[MySQL Monitor]   # 定義監(jiān)視的數(shù)據(jù)庫服務器
type=monitor
module=mysqlmon
servers=server1,server2    # 監(jiān)視server1和server2
user=mysqla      # 監(jiān)控用戶賬號
passwd=123qqq...A  # 監(jiān)控用戶連接密碼
monitor_interval=10000
#禁止只讀服務（注釋）
#[Read-Only Service]
#type=service
#router=readconnroute
#servers=server1
#user=myuser
#passwd=mypwd
#router_options=slave
[Read-Write Service]   # 啟用讀寫分離服務
type=service
router=readwritesplit
servers=server1,server2   # 讀寫分離在server1和server2服務器之間進行
user=mysqlb   # 路由用戶
passwd=123qqq...A  # 連接密碼
max_slave_connections=100%
[MaxAdmin Service]   # 管理服務（通過訪問管理服務可以查看監(jiān)控信息）
type=service
router=cli
# 因為只讀服務沒有啟用 ，不需要定義服務使用的端口號（注釋）
#[Read-Only Listener]
#type=listener
#service=Read-Only Service
#protocol=MySQLClient
#port=4008
[Read-Write Listener]   # 定義讀寫分離服務使用端口號
type=listener
service=Read-Write Service
protocol=MySQLClient
port=4006    # 端口號
[MaxAdmin Listener]   # 定義管理服務使用端口號
type=listener
service=MaxAdmin Service
protocol=maxscaled
socket=default
port=4016  # 端口號
:wq

[root@host61 ~]# mysql -uroot -p123qqq...A                     
# 添加監(jiān)控用戶 mysqla 用戶
mysql> grant  replication   slave , replication  client  on  *.*  to  
mysqla@"%" identified by "123qqq...A";
# 權(quán)限說明：
# replication client   監(jiān)視數(shù)據(jù)庫服務的運行狀態(tài)  
# replication slave      數(shù)據(jù)庫服務器的主從角色    
# 添加路由用戶 mysqlb 用戶
mysql> grant  select on  mysql.*  to  mysqlb@"%" identified by "123qqq...A";  # 對授權(quán)庫下的表有查詢權(quán)限
# 在從服務器查看用戶是否同步
[root@host62 ~]# mysql -uroot -p123qqq...A 
select user from mysql.user where user="mysqla";
select user from mysql.user where user="mysqlb";

# 安裝提供mysql命令的軟件
[root@host60 ~]# which  mysql || yum -y install mariadb   
[root@host60 ~]# mysql -h192.168.88.61 -umysqla -p123qqq...A
[root@host60 ~]# mysql -h192.168.88.62 -umysqla -p123qqq...A
[root@host60 ~]# mysql -h192.168.88.61 -umysqlb -p123qqq...A
[root@host60 ~]# mysql -h192.168.88.62 -umysqlb -p123qqq...A
# 說明：能連接成功才是對的，如果連接失?。簣?zhí)行如下操作
# 在主數(shù)據(jù)庫服務器host61 把添加 mysqla用戶 和 mysqlb 用戶的命令再執(zhí)行一遍
# 啟動服務 
[root@host60 ~]# maxscale   /etc/maxscale.cnf     
# 查看日志文件
[root@host60 ~]# ls /var/log/maxscale/   
maxscale.log 
# 查看讀寫分離服務端口號
[root@host60 ~]# netstat  -utnlp  | grep 4006     
tcp6       0      0 :::4006       :::*            LISTEN      1580/maxscale       
# 查看讀寫分離服務端口號
[root@host60 ~]# netstat  -utnlp  | grep 4016  
tcp6       0      0 :::4016       :::*        LISTEN      1580/maxscale       
#把服務殺死 再啟動  相當于重啟服務 （修改了配置文件后要重啟服務使其配置生效）
# 通過殺進程的方式停止服務 
[root@host60 ~]# killall -9 maxscale   
# 啟動服務
[root@host60 ~]# maxscale  /etc/maxscale.cnf     
# 在host60本機訪問管理服務查看數(shù)據(jù)庫服務的監(jiān)控信息
[root@host60 ~]# maxadmin -uadmin -pmariadb -P4016
MaxScale> list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server             | Address         | Port  | Connections | Status              
-------------------+-----------------+-------+-------------+--------------------
server1            | 192.168.88.61    |  3306 |           0 | Master, Running
server2            | 192.168.88.62    |  3306 |           0 | Slave, Running
-------------------+-----------------+-------+-------------+--------------------
MaxScale> exit      

# 首先在主數(shù)據(jù)庫服務器host61 添加客戶端連接使用的用戶
[root@host61 ~]# mysql -uroot -p密碼 
create database  bbsdb;
create  table bbsdb.a(id int);
grant select,insert on bbsdb.* to  yaya@"%"  identified by "123qqq...A";
# 在從服務器host62查看存儲數(shù)據(jù)庫表和添加用戶
[root@host62 ~]# mysql -uroot -p密碼
desc  bbsdb.a;
select  user from mysql.user where user="yaya";
# 客戶端host50連接讀寫分離服務器host60訪問數(shù)據(jù)庫服務
mysql -h讀寫分離服務器的ip   -P讀寫分離服務的端口號  -u數(shù)據(jù)庫授權(quán)用戶名  -p密碼 
[root@host50 ~]# mysql -h192.168.88.60 -P4006 -uyaya  -p123qqq...A  

mysql> select  * from bbsdb.a;
Empty set (0.00 sec)
mysql> insert into bbsdb.a values(8888);
Query OK, 1 row affected (0.06 sec)
mysql> select  * from bbsdb.a;
+------+
| id   |
+------+
| 8888 |
+------+
1 row in set (0.00 sec)

# 從服務器插入1條數(shù)據(jù)
[root@host62 ~]# mysql -uroot -p123qqq...A -e 'insert into bbsdb.a values(6262)'
[root@host62 ~]# mysql -uroot -p123qqq...A -e 'select * from bbsdb.a'
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+
| id   |
+------+
| 8888 |
| 6262 |
+------+
# 主服務器查詢
[root@host11 ~]# mysql -uroot -p123qqq...a  -e 'select  * from bbsdb.a'
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+
| id   |
+------+
| 8888 |
+------+
# 客戶端訪問讀寫分離服務器查詢數(shù)據(jù)（查詢結(jié)果為從服務器數(shù)據(jù)源）        
[root@host50 ~]# mysql -h192.168.88.60 -P4006 -uyaya  -p123qqq...A -e 'select * from bbsdb.a'
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+
| id   |
+------+
| 8888 |
| 6262 |
+------+

# 客戶端機插入數(shù)據(jù)
[root@host50 ~]# mysql -h192.168.88.60 -P4006 -uyaya  -p123qqq...A -e 'insert into bbsdb.a values(666)' 
# 在主服務器本機查看數(shù)據(jù)
[root@host61 ~]# mysql -uroot -p123qqq...a  -e 'select  * from bbsdb.a'
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+
| id   |
+------+
| 8888 |
|  666 |
+------+
[root@host50 ~]# mysql -h192.168.88.60 -P4006 -uyaya  -p123qqq...A -e 'select * from bbsdb.a'
mysql: [Warning] Using a password on the command line interface can be insecure.
+------+
| id   |
+------+
| 8888 |
| 6262 |
|  666 |
+------+