mysql proxy 读写分离

2019-02-28 阅读：2752 类型：后端分类：Mysql 标签： Mysql

在mysql主从基础上

利用mysql-proxy实现mysql读写分离

说明

master:192.168.235.128
slave:192.168.235.129
mysql-proxy:192.168.235.130:4040

原理

准备

#安装mysql-proxy需要依赖
yum -y install gcc* gcc-c++* autoconf* automake* zlib* libxml* ncurses-devel* libmcrypt* libtool* flex* pkgconfig* libevent* glib* readline*

编译安装lua

mysql-proxy的读写分离主要是通过rw-splitting.lua脚本实现的

安装mysql-proxy

wget https://downloads.mysql.com/archives/get/file/mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz

获取包,具体版本可用 uname -a 了解, mysql-proxy地址

tar xzvf mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz  #解压
mv mysql-proxy-0.8.5-linux-el6-x86-64bit /opt/mysql-proxy #移动到自己创建目录
#/opt/mysql-proxy/bin目录下
./mysql-proxy --help-all #查看命令

--proxy-read-only-backend-addresses=<host:port> #只读
--proxy-backend-addresses=<host:port> #写
--proxy-lua-script=<file> #指定脚本

cp  /opt/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua  /opt/mysql-proxy/scripts/rw-splitting.lua #复制

修改/opt/mysql-proxy/scripts/rw-splitting.lua

 37 -- connection pool
 38 if not proxy.global.config.rwsplit then
 39         proxy.global.config.rwsplit = {
 40                 min_idle_connections = 1,#生效读写分离连接数
 41                 max_idle_connections = 8,

运行

./mysql-proxy --proxy-read-only-backend-addresses=192.168.235.129 --proxy-backend-addresses=192.168.235.128 --proxy-lua-script=/opt/mysql-proxy/scripts/rw-splitting.lua
--keepalive