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一、简述
二、对MariaDB做主从复制
关于如何对MariaDB做主从复制，请移步本人博客http://wangfeng7399.blog.51cto.com/3518031/1394509
三、安装
1.可以通过rpm安装，其会提供配置文件及服务脚本，但是没有读写分享脚本
2.通过编译安装
①、源码安装时，MySQL proxy的依赖关系：
libevent 1.x or higher (1.3b or later is preferred).
lua 5.1.x or higher.
glib2 2.6.0 or higher.
pkg-config.
libtool 1.5 or higher.
MySQL 5.0.x or higher developer files.
②、下载源码包，编译安装
| 1 2 3 4 5 6 7 8 9 | # tar zxf mysql-proxy- 0.8 . 2 .tar.gz # cd mysql-proxy- 0.8 . 2 # ./configure # make # make check 如果管理员有密码，上面的步骤则需要使用如下格式进行： # MYSQL_PASSWORD=root_pwd make check # make install 默认情况下， mysql-proxy安装在/usr/local/sbin/mysql-proxy，而Lua示例脚本安装在/usr/local/share目录中。 |
3.通过通用二进制格式安装
①、下载解压。这里的系统平台为rhel6.5 64位系统
| 1 2 3 | [root@httpweb ~]# wget http: //mirror.sohu.com/mysql/MySQL-Proxy/mysql-proxy-0.8.4-linux-el6-x86-64bit.tar.gz [root@httpweb ~]# tar xf mysql-proxy- 0.8 . 4 -linux-el6-x86-64bit.tar.gz [root@httpweb ~]# mv mysql-proxy- 0.8 . 4 -linux-el6-x86-64bit /usr/local/mysql-proxy |
②、添加代理用户
| 1 | [root@httpweb mysql-proxy]# useradd mysql-proxy |
③、为mysql-proxy提供SysV服务脚本
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | #!/bin/bash # # mysql-proxy This script starts and stops the mysql-proxy daemon # # chkconfig: - 78 30 # processname: mysql-proxy # description: mysql-proxy is a proxy daemon for mysql # Source function library. . /etc/rc.d/init.d/functions prog= "/usr/local/mysql-proxy/bin/mysql-proxy" # Source networking configuration. if [ -f /etc/sysconfig/network ]; then . /etc/sysconfig/network fi # Check that networking is up. [ ${NETWORKING} = "no" ] && exit 0 # Set default mysql-proxy configuration. ADMIN_USER= "admin" ADMIN_PASSWD= "admin" ADMIN_LUA_SCRIPT= "/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua" PROXY_OPTIONS= "--daemon" PROXY_PID=/ var /run/mysql-proxy.pid PROXY_USER= "mysql-proxy" # Source mysql-proxy configuration. if [ -f /etc/sysconfig/mysql-proxy ]; then . /etc/sysconfig/mysql-proxy fi RETVAL= 0 start() { echo -n $ "Starting $prog: " daemon $prog $PROXY_OPTIONS --pid-file=$PROXY_PID --proxy-address= "$PROXY_ADDRESS" --user=$PROXY_USER --admin-username= "$ADMIN_USER" --admin-lua-script= "$ADMIN_LUA_SCRIPT" --admin-password= "$ADMIN_PASSWORD" RETVAL=$? echo if [ $RETVAL -eq 0 ]; then touch / var /lock/subsys/mysql-proxy fi } stop() { echo -n $ "Stopping $prog: " killproc -p $PROXY_PID -d 3 $prog RETVAL=$? echo if [ $RETVAL -eq 0 ]; then rm -f / var /lock/subsys/mysql-proxy rm -f $PROXY_PID fi } # See how we were called. case "$1" in start) start ;; stop) stop ;; restart) stop start ;; condrestart| try -restart) if status -p $PROXY_PIDFILE $prog >&/dev/ null ; then stop start fi ;; status) status -p $PROXY_PID $prog ;; *) echo "Usage: $0 {start|stop|restart|reload|status|condrestart|try-restart}" RETVAL= 1 ;; esac exit $RETVAL |
将上述内容保存为/etc/init.d/mysql-proxy，给予执行权限，而后添加至服务列表
| 1 2 3 | [root@httpweb mysql-proxy]# vi /etc/init.d/mysql-proxy [root@httpweb mysql-proxy]# chmod +x /etc/init.d/mysql-proxy [root@httpweb mysql-proxy]# chkconfig --add mysql-proxy |
④、为服务脚本提供配置文件/etc/sysconfig/mysql-proxy
| 1 2 3 4 5 6 7 8 9 | #Options for mysql-proxy ADMIN_USER= "wangfeng7399" ADMIN_PASSWORD= "wangfeng7399" ADMIN_ADDRESS= "" ADMIN_LUA_SCRIPT= "/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua" PROXY_ADDRESS= "" PROXY_USER= "mysql-proxy" PROXY_OPTIONS= "--daemon --log-level=info --log-use-syslog --plugins=proxy --plugins=admin --proxy-backend-addresses=192.168.1.200:3306 --proxy-read-only-backend-addresses=192.168.1.202:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua" 其中的proxy-backend-addresses选项和proxy-read-only-backend-addresses选项均可重复使用多次，以实现指定多个读写服务器或只读服务器。 |
⑤、mysql-proxy的配置选项
mysql-proxy的配置选项大致可分为帮助选项、管理选项、代理选项及应用程序选项几类，下面一起去介绍它们。
--help
--help-admin
--help-proxy
--help-all ———— 以上四个选项均用于获取帮助信息；
--proxy-address=host:port ———— 代理服务监听的地址和端口；
--admin-address=host:port ———— 管理模块监听的地址和端口；
--proxy-backend-addresses=host:port ———— 后端mysql服务器的地址和端口；
--proxy-read-only-backend-addresses=host:port ———— 后端只读mysql服务器的地址和端口；
--proxy-lua-script=file_name ———— 完成mysql代理功能的Lua脚本；
--daemon ———— 以守护进程模式启动mysql-proxy；
--keepalive ———— 在mysql-proxy崩溃时尝试重启之；
--log-file=/path/to/log_file_name ———— 日志文件名称；
--log-level=level ———— 日志级别；
--log-use-syslog ———— 基于syslog记录日志；
--plugins=plugin,.. ———— 在mysql-proxy启动时加载的插件；
--user=user_name ———— 运行mysql-proxy进程的用户；
--defaults-file=/path/to/conf_file_name ———— 默认使用的配置文件路径；其配置段使用[mysql-proxy]标识；
--proxy-skip-profiling ———— 禁用profile；
--pid-file=/path/to/pid_file_name ———— 进程文件名；
⑥、提供admin.lua文件，将其保存至/usr/local/mysql-proxy/share/mysql-proxy/中
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | --[[ $%BEGINLICENSE%$ Copyright (c) 2007 , 2012 , Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110 - 1301 USA $%ENDLICENSE%$ --]] function set_error(errmsg) proxy.response = { type = proxy.MYSQLD_PACKET_ERR, errmsg = errmsg or "error" } end function read_query(packet) if packet:byte() ~= proxy.COM_QUERY then set_error( "[admin] we only handle text-based queries (COM_QUERY)" ) return proxy.PROXY_SEND_RESULT end local query = packet:sub( 2 ) local rows = { } local fields = { } if query:lower() == "select * from backends" then fields = { { name = "backend_ndx" , type = proxy.MYSQL_TYPE_LONG }, { name = "address" , type = proxy.MYSQL_TYPE_STRING }, { name = "state" , type = proxy.MYSQL_TYPE_STRING }, { name = "type" , type = proxy.MYSQL_TYPE_STRING }, { name = "uuid" , type = proxy.MYSQL_TYPE_STRING }, { name = "connected_clients" , type = proxy.MYSQL_TYPE_LONG }, } for i = 1 , #proxy.global.backends do local states = { "unknown" , "up" , "down" } local types = { "unknown" , "rw" , "ro" } local b = proxy.global.backends[i] rows[#rows + 1 ] = { i, b.dst.name, -- configured backend address states[b.state + 1 ], -- the C-id is pushed down starting at 0 types[b.type + 1 ], -- the C-id is pushed down starting at 0 b.uuid, -- the MySQL Server's UUID if it is managed b.connected_clients -- currently connected clients } end elseif query:lower() == "select * from help" then fields = { { name = "command" , type = proxy.MYSQL_TYPE_STRING }, { name = "description" , type = proxy.MYSQL_TYPE_STRING }, } rows[#rows + 1 ] = { "SELECT * FROM help" , "shows this help" } rows[#rows + 1 ] = { "SELECT * FROM backends" , "lists the backends and their state" } else set_error( "use 'SELECT * FROM help' to see the supported commands" ) return proxy.PROXY_SEND_RESULT end proxy.response = { type = proxy.MYSQLD_PACKET_OK, resultset = { fields = fields, rows = rows } } return proxy.PROXY_SEND_RESULT end |
⑦、测试
管理功能测试
可以看到4041端口和3306端口以及处于监听状态
我们在主服务器上授予201数据库写的权限
| 1 2 | MariaDB [(none)]> grant all on *.* to 'wangfeng7399' @ '192.168.1.201' identified by 'wangfeng7399' ; MariaDB [(none)]> flush privileges; |
| 1 2 | [root@httpweb mysql-proxy]# mysql -uwangfeng7399 -pwangfeng7399 -h192. 168.1 . 201 --port= 3306 我们可以看到我们在mysql-proxy的可以登录数据库了 |
查看是否配置成功
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | [root@httpweb ~]# mysql -uwangfeng7399 -pwangfeng7399 -h192. 168.1 . 201 --port= 4041 Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.0 . 99 -agent-admin 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. mysql> select * from backends; +-------------+--------------------+---------+------+------+-------------------+ | backend_ndx | address | state | type | uuid | connected_clients | +-------------+--------------------+---------+------+------+-------------------+ | 1 | 192.168 . 1.200 : 3306 | up | rw | NULL | 0 | | 2 | 192.168 . 1.202 : 3306 | up | ro | NULL | 0 | +-------------+--------------------+---------+------+------+-------------------+ |
我们的程序就可以实现真正意义上的读写分离了，大功告成，由于本人水平有限，请各位大神多多批评指正
本文转自wangfeng7399 51CTO博客，原文链接：http://blog.51cto.com/wangfeng7399/1395039，如需转载请自行联系原作者