mysql-proxy实现MySQL读写分离
使用二进制格式的mysql-proxy的安装配置
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mysql-proxy本身并不能进行读写分离,要实现读写分离要依赖于lua,所以要先查看是否安装了lua,如果没有安装使用yum install安装上即可
~]# rpm -q lua lua-5.1.4-4.1.el6.x86_64
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创建系统用户
useradd -r mysql-proxy
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解压包创建链接文件
tar zxf mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz -C /usr/local/ ln -s mysql-proxy-0.8.5-linux-el6-x86-64bit/ mysql-proxy
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导出二进制程序
~]# vim /etc/profile.d/mysql-proxy.sh 内容为: export PATH=/usr/loca/mysql-proxy/bin/:$PATH ~]# source /etc/profile.d/mysql-proxy.sh
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查看mysql-proxy用法
~]# mysql-proxy --help-all #比较重要的选项有以下几个 --daemon #让mysql-proxy在后台工作 --user=<user> #指定运行mysql-proxy进程的属主 --proxy-backend-addresses=<host:port> #后端服务器 --proxy-read-only-backend-addresses=<host:port> #只允许读的后端服务器 --log-level=(error|warning|info|message|debug) #指定日志级别 --log-file=<file> #指定日志文件路径 --plugins=<name> #要加载的插件名,插件路径在/usr/local/mysql-proxy/lib/mysql-proxy/plugins,该路径下有一个libadmin.so的插件,可以用来管理后端服务器,还有libproxy.so的插件,启用proxy的功能 --keepalive #如果proxy崩溃了,就会尝试去重启proxy --proxy-lua-script=<file> #指定要使用的lua脚本文件,lua脚本路径在/usr/local/mysql-proxy/share/doc/mysql-proxy,该路径下有一个实现读写分离的lua脚本文件rw-splitting.lua --defaults-file #指定配置文件路径
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启用mysql-proxy
~]# mysql-proxy --daemon \ > --user=mysql-proxy \ > --log-level=debug \ > --log-file=/var/log/mysql-proxy.log \ > --plugins=proxy \ > --plugins=admin \ > --proxy-backend-addresses=172.25.78.2:3306 \ > --proxy-read-only-backend-addresses=172.25.78.3:3306 \ > --keepalive=true \ > --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua \ > --admin-username=admin \ > --admin-password=adminpass \ > --admin-lua-script=/usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua
- 查看启用的端口
]# netstat -tan | grep :40 tcp 0 0 0.0.0.0:4040 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:4041 0.0.0.0:* LISTEN #4041是admin管理接口的端口,4040是mysql-proxy的端口
连接测试
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在代理服务器上(172.25.78.4)连接到管理接口查看有哪些后端服务器
mysql -uadmin -padminpass -h272.25.78.4 --port=4041 MySQL [(none)]> SELECT * FROM backends; +-------------+------------------+---------+------+------+-------------------+ | backend_ndx | address | state | type | uuid | connected_clients | +-------------+------------------+---------+------+------+-------------------+ | 1 | 172.25.78.2:3306 | unknown | rw | NULL | 0 | | 2 | 172.25.78.3:3306 | unknown | ro | NULL | 0 | +-------------+------------------+---------+------+------+-------------------+
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在master节点和slave节点上添加测试用户
MariaDB [(none)]> GRANT SELECT,INSERT,UPDATE ON *.* TO 'test'@'172.25.78.%' IDENTIFIED BY 'testpass';
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在客户端进行测试
~]# mysql -utest -ptestpass -h272.25.78.4 -P4040 MariaDB [(none)]> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | MYDB | | S_SC_C | | db_user | | discuz | | dvwa | | hello | | mysql | | performance_schema | | test | | testdb | +--------------------+ MariaDB [(none)]> USE S_SC_C; MariaDB [S_SC_C]> INSERT INTO S_1(sname,sdept) VALUES ('H','AA'); MariaDB [S_SC_C]> SELECT * FROM S_1; +-----+-------+-------+ | sid | sname | sdept | +-----+-------+-------+ | 1 | HELLO | A | | 2 | HE | A | | 3 | H | AA | +-----+-------+-------+
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在master上查看
MariaDB [S_SC_C]> SELECT * FROM S_1; +-----+-------+-------+ | sid | sname | sdept | +-----+-------+-------+ | 1 | HELLO | A | | 2 | HE | A | | 3 | H | AA | +-----+-------+-------+
- 在slave上查看
MariaDB [S_SC_C]> SELECT * FROM S_1; +-----+-------+-------+ | sid | sname | sdept | +-----+-------+-------+ | 1 | HELLO | A | | 2 | HE | A | | 3 | H | AA | +-----+-------+-------+