mysql-proxy 读写分离

1.主从服务器配置（略）

master：188.188.1.144

slave：188.188.1.175

在Master和slave 上配置代理的访问用户：

grant all privileges on *.* to 'root'@'188.188.1.1%' identified by '123456';

2.mysql-proxy配置（188.188.1.138）

2.1 安装前配置：

安装mysql客户端

检查如下包是否安装：

rpm -qa | grep name

gcc* gcc-c++* autoconf* automake* zlib* libxml* ncurses-devel* libmcrypt* libtool* flex* pkgconfig* libevent* glib*

安装libmcrypt

tar zxvf libmcrypt-2.5.8.tar.gz 

cd libmcrypt-2.5.8/

./configure

make

make install

/sbin/ldconfig

cd libltdl/

./configure --enable-ltdl-install

make

make install

安装 ncurses-devel

rpm -ivh ncurses-devel-5.5-24.20060715.i386.rpm

2.1 安装LUA

[root@localhost soft]# tar -zxvf lua-5.2.0.tar.gz

[root@localhost soft]# cd lua-5.2.0
[root@localhost lua-5.2.0]# ls
doc  Makefile  README  src
[root@localhost lua-5.2.0]# make linux

[root@localhost lua-5.2.0]# make install

导出环境变量：

[root@localhost lua-5.2.0]# export LUA_CFLAGS="-I/usr/local/include" LUA_LIBS="-L/usr/local/lib -llua -ldl" LDFLAGS="-lm"

2.2 安装mysql-proxy

32位RHEL5平台：

http://mysql.cdpa.nsysu.edu.tw/Downloads/MySQL-Proxy/mysql-proxy-0.8.1-linux-rhel5-x86-32bit.tar.gz

64位RHEL5平台：

http://mysql.cdpa.nsysu.edu.tw/Downloads/MySQL-Proxy/mysql-proxy-0.8.1-linux-rhel5-x86-64bit.tar.gz

解压安装：

[root@localhost soft]# tar -zxvf mysql-proxy-0.8.1-linux-rhel5-x86-32bit.tar.gz

[root@localhost soft]# mv mysql-proxy-0.8.1-linux-rhel5-x86-32bit /usr/local/mysql-proxy
[root@localhost soft]# cd /usr/local/mysql-proxy/
[root@localhost mysql-proxy]# ls
bin  include  lib  libexec  share

设置路径变量：

[root@localhost mysql-proxy]# vi /etc/profile

export PATH=$PATH:/usr/local/mysql-proxy/bin

[root@localhost mysql-proxy]# source /etc/profile

2.3 查看mysql-proxy选项

 

PROXY_PATH=/opt/mysql-proxy/bin //定义mysql-proxy服务二进制文件路径

PROXY_OPTIONS=”�Cadmin-username=root \ //定义内部管理服务器账号

--admin-password=password \ //定义内部管理服务器密码

--proxy-read-only-backend-addresses=192.168.10.131:3306 \ //定义后端只读从服务器地址

--proxy-backend-addresses=192.168.10.130:3306 \ //定义后端主服务器地址

--admin-lua-script=/opt/mysql-proxy/lib/mysql-proxy/lua/admin.lua \ //定义lua管理脚本路径

--proxy-lua-script=/opt/mysql-proxy/scripts/rw-splitting.lua” \ //定义lua读写分离脚本路径

PROXY_PID=/opt/mysql-proxy/run/mysql-proxy.pid //定义mysql-proxy PID文件路径

$NICELEVEL $PROXY_PATH/mysql-proxy $PROXY_OPTIONS \

--daemon \ //定义以守护进程模式启动

--keepalive \ //使进程在异常关闭后能够自动恢复

--pid-file=$PROXY_PID \ //定义mysql-proxy PID文件路径

--user=mysql \ //以mysql用户身份启动服务

--log-level=debug \ //定义log日志级别，由高到低分别有(error|warning|info|message|debug)

--log-file=/opt/mysql-proxy/log/mysql-proxy.log //定义log日志文件路径

2.4 修改读写分离脚本

修改读写分离脚本rw-splitting.lua

修改默认连接，进行快速测试，不修改的话要达到连接数为4时才启用读写分离

[root@localhost mysql-proxy]# vi rw-splitting.lua

....

-- connection pool
if not proxy.global.config.rwsplit then
        proxy.global.config.rwsplit = {
                min_idle_connections = 1,    #修改为1
                max_idle_connections = 1,   #修改为1

                is_debug = true
        }
end

2.5 启动服务：

[root@localhost ~]# mysql-proxy --admin-username=root --admin-password=123456 --admin-lua-script=/usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua --proxy-read-only-backend-addresses=188.188.1.175:3306 --proxy-backend-addresses=188.188.1.144:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua --log-level=info --log-file=/usr/local/mysql-proxy/logs/mysq-proxy.log &
[1] 30332

查看服务运行端口：

[root@localhost ~]# netstat -ntpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:4040                0.0.0.0:*                   LISTEN      30332/mysql-proxy   
tcp        0      0 0.0.0.0:4041                0.0.0.0:*                   LISTEN      30332/mysql-proxy   
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      2660/portmap        
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      3013/cupsd          
tcp        0      0 0.0.0.0:759                 0.0.0.0:*                   LISTEN      2697/rpc.statd      
tcp        0      0 :::22                       :::*                        LISTEN      2999/sshd   

查看服务：

[root@localhost ~]# ps -ef | grep mysql-proxy
root     30332  3351  0 21:10 pts/0    00:00:00 /usr/local/mysql-proxy/libexec/mysql-proxy --admin-username=root --admin-password=123456 --admin-lua-script=/usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua --proxy-read-only-backend-addresses=188.188.1.175:3306 --proxy-backend-addresses=188.188.1.144:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua --log-level=info --log-file=/usr/local/mysql-proxy/logs/mysq-proxy.log
root     30345  3351  0 21:12 pts/0    00:00:00 grep mysql-proxy

3.测试：

为了测试读写分离，先停掉从服务

[root@localhost logs]# mysql -uroot -p123456 -h188.188.1.138 -P4040

mysql> use ckl

查看表：

mysql> select * from qinglv;
[read_query] 188.188.1.138:56958
  current backend   = 0
  client default db = ckl
  client username   = root
  query             = select * from qinglv
  sending to backend : 188.188.1.175:3306
    is_slave         : true
    server default db: ckl
    server username  : root
    in_trans        : false
    in_calc_found   : false
    COM_QUERY       : true
+-----------+------+
| name      | age  |
+-----------+------+
| ckl       |   26 |
| xiong     |   24 |
| ckl       |   26 |
| xiong     |   24 |
| kangle    |    0 |
| kangkang  |   26 |
| xiaoxiong |   24 |
| haha      |   33 |
| ceshi     |   34 |
| wukaka    |   30 |
| heixiu    |   28 |
| zengjia   |   22 |
| mama      |   23 |
| meko      |   32 |
| kkk       |   89 |
| jkl       |   20 |
| jia       |   23 |
+-----------+------+
17 rows in set (0.00 sec)

插入数据：

mysql> insert into qinglv values('wuba',25);
[read_query] 188.188.1.138:56958
  current backend   = 0
  client default db = ckl
  client username   = root
  query             = insert into qinglv values('wuba',25)
  sending to backend : 188.188.1.144:3306
    is_slave         : false
    server default db: ckl
    server username  : root
    in_trans        : false
    in_calc_found   : false
    COM_QUERY       : true
Query OK, 1 row affected (0.01 sec)

查看表：

mysql> select * from qinglv;
[read_query] 188.188.1.138:56958
  current backend   = 0
  client default db = ckl
  client username   = root
  query             = select * from qinglv
    server default db: 
    client default db: ckl
    syncronizing
  sending to backend : 188.188.1.175:3306
    is_slave         : true
    server default db: 
    server username  : root
    in_trans        : false
    in_calc_found   : false
    COM_QUERY       : true
+-----------+------+
| name      | age  |
+-----------+------+
| ckl       |   26 |
| xiong     |   24 |
| ckl       |   26 |
| xiong     |   24 |
| kangle    |    0 |
| kangkang  |   26 |
| xiaoxiong |   24 |
| haha      |   33 |
| ceshi     |   34 |
| wukaka    |   30 |
| heixiu    |   28 |
| zengjia   |   22 |
| mama      |   23 |
| meko      |   32 |
| kkk       |   89 |
| jkl       |   20 |
| jia       |   23 |
+-----------+------+
17 rows in set (0.00 sec)

没有数据

启动主从同步，再查看：

mysql> select * from qinglv;
[read_query] 188.188.1.138:56958
  current backend   = 0
  client default db = ckl
  client username   = root
  query             = select * from qinglv
  sending to backend : 188.188.1.175:3306
    is_slave         : true
    server default db: ckl
    server username  : root
    in_trans        : false
    in_calc_found   : false
    COM_QUERY       : true
+-----------+------+
| name      | age  |
+-----------+------+
| ckl       |   26 |
| xiong     |   24 |
| ckl       |   26 |
| xiong     |   24 |
| kangle    |    0 |
| kangkang  |   26 |
| xiaoxiong |   24 |
| haha      |   33 |
| ceshi     |   34 |
| wukaka    |   30 |
| heixiu    |   28 |
| zengjia   |   22 |
| mama      |   23 |
| meko      |   32 |
| kkk       |   89 |
| jkl       |   20 |
| jia       |   23 |
| bba       |   12 |
| wuba      |   25 |
+-----------+------+
19 rows in set (0.00 sec)

查看日志：

[root@localhost logs]# cat /usr/local/mysql-proxy/logs/mysq-proxy.log 
2012-03-29 21:10:48: (message) mysql-proxy 0.8.1 started
2012-03-29 21:10:48: (message) proxy listening on port :4040
2012-03-29 21:10:48: (message) added read/write backend: 188.188.1.144:3306
2012-03-29 21:10:48: (message) added read-only backend: 188.188.1.175:3306
2012-03-29 21:14:45: (message) mysql-proxy 0.8.1 started
2012-03-29 21:14:45: (message) proxy listening on port :4040
2012-03-29 21:14:45: (message) added read/write backend: 188.188.1.144:3306
2012-03-29 21:14:45: (message) added read-only backend: 188.188.1.175:3306

至此，读写分离完成。