實驗環境:
系統:reddhat6.5
mysql 版本:mysql-5.7.17-1.el6.x86_64.rpm-bundle.tar
mysql-proxy:mysql-proxy-0.8.4-linux-el6-x86-64bit.tar.gz
下載連結 http://ftp.ntu.edu.tw/pub/MySQL/Downloads/MySQL-Proxy/
172.25.62.4(master)
172.25.62.6 (slave)
172.25.62.3(proxy 代理伺服器)
172.25.62.2(客戶端)
基本原理:
mysql 主從複製和代理:
客戶端傳送請求給 mysql-proxy 代理伺服器,所接受道德請求又 proxy 進行判斷,如果
是寫操作,則交給 master 去處理,如果是讀操作,則交給 slave 處理。讀寫分離的策略基於
lua 指令碼實現。因此客戶端不用去區分讀寫目標,而是由 proxy 決定。
其中 Master 伺服器允許 SQL 查詢、寫入,Slave 伺服器只允許 SQL 查詢
1. 172.25.62.4 和 172.25.62.6 主從複製正常
2. proxy 代理伺服器:
(1)解壓 mysql-proxy 原始碼包到/usr/local
tar zxf mysql-proxy-0.8.4-linux-el6-x86-64bit.tar.gz -C /usr/local
mv /usr/local/mysql-proxy-0.8.4-linux-el6-x86-64bit/ mysql-proxy
cd mysql-proxy/
(2)mysql-proxy 使用 lua 指令碼語言,必須安裝 lua 軟體包,rhel6 的 lua 可以直接 yum
安裝。
yum install lua -y
cd share/doc/mysql-proxy/rw-splitting.lua ./
(3)複製 lua 指令碼(lua 指令碼包含實現讀寫分離的策略)
cp share/doc/mysql-proxy/rw-splitting.lua /usr/local/mysql-proxy/
(4)啟動 mysql-proxy 代理服務
/usr/local/mysql-proxy/bin./mysql-proxy
-P
172.25.62.3
172.25.62.4:3306 -r 172.25.62.6:3306 -s rw-splitting.lua &
*******引數解釋********
-P 172.25.62.3:3306
-b 172.25.62.4:3306
-r 172.25.62.6:3306
-s rw-splitting.lua
:
3306
-b
指定代理監聽的 ip 地址,埠
指定寫伺服器的 ip 地址,埠
指定讀伺服器的 ip 地址,埠
指定 lua 指令碼
過濾監聽埠,確認 mysql-proxy 是否啟動成功
[

[email protected] bin]# netstat -antlpe | grep mysql
tcp
0
0 172.25.62.3:3306
LISTEN
0
9560
1124/mysql-proxy
0.0.0.0:*3. 客戶端測試:
在 Master 伺服器上授權使用者,允許其從 172.25.62.0 的客戶機遠端訪問。
mysql> grant all on *.* to [email protected]'172.25.62.%' identified by 'Westos+123';
Query OK, 0 rows affected, 1 warning (0.19 sec)
[

[email protected] ~]# mysql -h172.25.62.3 -uhzy -p
//客戶端上訪問代理伺服器的
mysql 資料庫
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6341
Server version: 5.7.17-log MySQL Community Server (GPL)
mysql> create database student;
//新建 student 庫
Query OK, 1 row affected (0.11 sec)
mysql> use student;
Database changed
mysql> create table info(id int(4),name varchar(48)); //建立 info 表
Query OK, 0 rows affected (1.21 sec)
mysql> insert into info values(1,'westos'),(2,'linux'); //插入資料資訊
Query OK, 2 rows affected (0.18 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select * from info;
+------+--------+
| id | name
|
+------+--------+
|
1 | westos |
|
2 | linux |
+------+--------+
2 rows in set (0.01 sec)
mysql> quit
4. 在 master 和 slave 上檢視客戶端新建的資料庫表資訊
master:
[

[email protected] ~]# mysql -h172.25.62.4 -uhzy -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6342
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;
+--------------------+
| Database
|
+--------------------+
| information_schema |
| mysql
|
| performance_schema |
| student
|
| sys
|
+--------------------+
5 rows in set (0.00 sec)
mysql> use student;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+-------------------+
| Tables_in_student |
+-------------------+
| info
|
+-------------------+
1 row in set (0.00 sec)
mysql> select * from info;
+------+--------+
| id | name
|
+------+--------+
|
1 | westos |
|
2 | linux |
+------+--------+
2 rows in set (0.00 sec)
登陸 slave:
[[email protected] ~]# mysql -h172.25.62.6 -uhzy -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+| Database
|
+--------------------+
| information_schema |
| mysql
|
| performance_schema |
| student
|
| sys
|
+--------------------+
5 rows in set (0.00 sec)
mysql> select * from studnet.info;
ERROR 1146 (42S02): Table 'studnet.info' doesn't exist
mysql> select * from student.info;
+------+--------+
| id | name
|
+------+--------+
|
1 | westos |
|
2 | linux |
+------+--------+
2 rows in set (0.00 sec)
5.過濾 proxy 伺服器上 mysql 訪問的網路連線:

netstat -anpt | grep mysql

[[email protected] ~]# netstat -antlpe |grep mysql
tcp         0        0  172.25.62.3:3306              0.0.0.0:*                                  LISTEN            0
       10315         1191/mysql-proxy                         
tcp         0        0  172.25.62.3:46553            172.25.62.4:3306                   ESTABLISHED 0
       10319         1191/mysql-proxy
Proxy 連線了 master(172.25.62.4)執行寫操作。

master 上:

[[email protected] ~]# netstat -antlpe |grep mysql
tcp        0         0  :::3306                                                      :::*                                           LISTEN             27

       16680          1890/mysqld

tcp        0         0  ::ffff:172.25.62.4:3306                              ::ffff:172.25.62.3:46553          ESTABLISHED  27

       16695          1890/mysqld

tcp        0         0  ::ffff:172.25.62.4:3306                              ::ffff:172.25.62.6:33130          ESTABLISHED  27

       16691          1890/mysqld