mysql-proxy读写分离笔记

    1、MySQL的安装与配置 --省略

版本:Server version: 5.6.35

1.1 系统版本:

[root@centos7-67 package]# lsb_release -a

LSB Version: :core-4.1-amd64:core-4.1-noarch

Distributor ID: CentOS

Description: CentOS Linux release 7.2.1511 (Core) 

Release: 7.2.1511

Codename: Core

 

2、场景描述

数据库Master主服务器:192.168.1.83

数据库Slave从服务器:192.168.1.66

MySQL-Proxy调度服务器:192.168.1.67

以下操作,均是在192.168.1.67即MySQL-Proxy调度服务器 上进行的。

 

   配置主从复制,并在192.168.1.66上开启 start slave;

 

   MySQL-Proxy上安装所需软件包

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

  

3、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,因此需要安装lua

下载:

从http://www.lua.org/download.html下载源码包

wget http://www.lua.org/ftp/lua-5.3.4.tar.gz

3.1  tar xf lua-5.3.4.tar.gz

3.2  cd lua-5.3.4

3.3  vi src/Makefile

CFLAGS= -O2 -Wall -fPIC -Wextra -DLUA_COMPAT_5_2 $(SYSCFLAGS) $(MYCFLAGS)

3.4   make linux

3.5   make install

下载:https://downloads.mysql.com/archives/get/file/mysql-proxy-0.8.5-linux-glibc2.3-x86-64bit.tar.gz

4、tar xf mysql-proxy-0.8.5-linux-glibc2.3-x86-64bit.tar.gz

5、mv mysql-proxy-0.8.5-linux-glibc2.3-x86-64bit /usr/local/mysql-proxy

6、cd /usr/local/mysql-proxy

7、mkdir lua #创建脚本存放目录

   mkdir logs #创建日志目录

8、cp share/doc/mysql-proxy/rw-splitting.lua ./lua #复制读写分离配置文件

9、cp share/doc/mysql-proxy/admin-sql.lua ./lua #复制管理脚本

10、vi /etc/init.d/mysql-proxy   #创建mysql-proxy服务管理脚本

[root@centos7-67 ~]# cat /etc/init.d/mysql-proxy 
#!/bin/sh
# mysql-proxy This script starts and stops the mysql-proxy daemon
#
# chkconfig: - 78 30
# processname: mysql-proxy
# description: mysql-proxy is a proxy daemon to mysql
# Source function library.
. /etc/rc.d/init.d/functions
#PROXY_PATH=/usr/local/bin
PROXY_PATH=/usr/local/mysql-proxy/bin
prog="mysql-proxy"
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
#[ ${NETWORKING} == "no" ] && exit 0
# Set default mysql-proxy configuration.

PROXY_OPTIONS="--log-level=info \
--log-file=/var/log/mysql-proxy.log \
--plugins=proxy -b 192.168.1.83:3306 -r 192.168.1.66:3306 \
--proxy-lua-script=/usr/local/mysql-proxy/lua/rw-splitting.lua \
--plugins=admin --admin-username=admin \
--admin-password=admin \
--admin-lua-script=/usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua"

PROXY_PID=/usr/local/mysql-proxy/mysql-proxy.pid
# Source mysql-proxy configuration.

if [ -f /etc/sysconfig/mysql-proxy ]; then

        . /etc/sysconfig/mysql-proxy

fi
PATH=$PATH:/usr/bin:/usr/local/bin:$PROXY_PATH
# By default it's all good
RETVAL=0

# See how we were called.
case "$1" in
  start)
        # Start daemon.
        echo -n $"Starting $prog: "
        $NICELEVEL $PROXY_PATH/mysql-proxy $PROXY_OPTIONS --daemon --pid-file=$PROXY_PID --user=mysql
        RETVAL=$?
        echo
        if [ $RETVAL = 0 ]; then
                touch /var/lock/subsys/mysql-proxy
        fi
       ;;
  stop)
        # Stop daemons.
        echo -n $"Stopping $prog: "
        killproc $prog
        RETVAL=$?
        echo
        if [ $RETVAL = 0 ]; then
                rm -f /var/lock/subsys/mysql-proxy
                rm -f $PROXY_PID
        fi
       ;;
  restart)
        $0 stop
        sleep 3
        $0 start
       ;;
  condrestart)
       [ -e /var/lock/subsys/mysql-proxy ] && $0 restart
      ;;
  status)
        status mysql-proxy
        RETVAL=$?
       ;;
  *)
        echo "Usage: $0 {start|stop|restart|status|condrestart}"
        RETVAL=1
       ;;
esac
exit $RETVAL

  11、脚本更改说明:

   

PROXY_PATH=/usr/local/mysql-proxy/bin//定义mysql-proxy

  服务二进制文件路径 

    

--proxy-read-only-backend-addresses=192.168.1.66:3306 

  定义从服务器可读

--proxy-backend-addresses=192.168.1.83:3306

  定义主服务器可写 --proxy-lua-script=/usr/local/mysql-proxy/lua/rw-splitting.lua"//定义lua读写分离脚本路径

 

PROXY_PID=/usr/local/mysql-proxy/mysql-proxy.pid//定义mysql-proxy PID文件路径

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

--log-file=/usr/local/mysql-proxy/logs/mysql-proxy.log //定义log日志文件路径

12、chmod 755  /etc/init.d/mysql-proxy

13、vi /usr/local/mysql-proxy/lua/rw-splitting.lua //修改读写分离脚本//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

-- connection pool
if not proxy.global.config.rwsplit then
        proxy.global.config.rwsplit = {
                min_idle_connections = 1,//默认为4
                max_idle_connections = 1,//默认为8

                is_debug = false
        }
end

  14、启动mysql-proxy

/etc/init.d/mysql-proxy start

  15、启动成功:

      

[root@centos7-67 ~]# netstat -nutlp| grep mysql
tcp        0      0 0.0.0.0:4040            0.0.0.0:*               LISTEN      18520/mysql-proxy   
tcp        0      0 0.0.0.0:4041            0.0.0.0:*               LISTEN      18520/mysql-proxy 

  16、测试读写分离效果

   创建用于读写分离的数据库连接用户

登陆主数据库服务器192.168.1.83,通过命令行登录管理MySQL服务器

mysql>  GRANT ALL ON *.* TO 'proxy1'@'192.168.1.67' IDENTIFIED BY 'password';

由于我们配置了主从复制功能,因此从数据库服务器172.16.1.66上已经同步此操作。

为了清晰的看到读写分离的效果,需要暂时关闭MySQL主从复制功能;线上是需要主从同步的,这里只是做实验测试,需要关闭

登录从数据库服务器192.168.1.66

关闭Slave同步进程

mysql> stop slave;

 连接到mysql-proxy

[root@centos7-67 ~]# mysql -uproxy1 -p'password' -P4040 -h192.168.1.67

  插入2条数据

   

mysql> insert into t1 values (120,'third');
Query OK, 1 row affected (0.02 sec)

mysql> insert into t1 values (121,'for');
Query OK, 1 row affected (0.01 sec)

  

验证:

mysql-proxy:

mysql> select * from t1; //没有看到数据

 

master:

mysql> select * from t1; //可以看到数据

 

slave:

mysql> select * from t1; //没有看到数据

 

连接管理端口:

[root@centos7-67 ~]# mysql -uadmin -padmin -h192.168.1.67 -P4041

mysql> SELECT * FROM backends;

+-------------+-------------------+-------+------+------+-------------------+

| backend_ndx | address           | state | type | uuid | connected_clients |

+-------------+-------------------+-------+------+------+-------------------+

|           1 | 192.168.1.83:3306 | up    | rw   | NULL |                 0 |

|           2 | 192.168.1.66:3306 | up    | ro   | NULL |                 0 |

+-------------+-------------------+-------+------+------+-------------------+

2 rows in set (0.00 sec)

 

up:表示读写分离生效;unKnown:还没生效

 

结论:当在mysql-proxy插入数据时,写入到了master上,查询数据是从slave上查看,所以查询不到数据。当在slave上插入数据,在mysql-proxy上可以看到,说明读是从slave上,写是在master上。

 

posted @ 2018-03-21 22:45  圆柱模板  阅读(164)  评论(0编辑  收藏  举报