MySQL Proxy安装和使用(一)

按照手册安装MySQL Proxy之前先要安装以下软件

  • 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

    rpm查看libevent
  • $rpm -q libevent
    libevent-1.1a-3.2.1

    勉强用吧,家下来安装lua

    $tar xvzf lua-5.1.4.tar.gz

    $cd lua-5.1.4

    $make linux

    $make install

    $cp etc/lua.pc /usr/local/lib/pkgconfig/

    之后安装MySQL Proxy按转世继续报错,呵呵,虽然手册上对于glib2写的版本是2.6.0及以后实际在MySQL Proxy0.7.2上是要求>2.16的,继续升级glib2

    $tar xvzf glib-2.23.0.tar.gz

    $cd glib-2.23.0

    $./configure

    $make

    $make install

    然后提示安装libevent版本过低,晕了

    $tar xvzf libevent-1.4.13-stable.tar.gz

    $cd libevent-1.4.13-stable

    $./configure

    $make

    $make install

    这次再去安装MySQL Proxy

    $tar zxf mysql-proxy-0.7.2 .tar.gz

    $cd mysql-proxy-0.7.2

    $./configure --with-mysql=/usr/local/mysql/bin/mysql_config --with-lua

    $make

    $make install

    默认的mysql-proxy 被安装到/usr/local/sbin/mysql-proxy而lua实例脚本则在/usr/local/share/doc下(不过好像需要之前make test才有,不确定) .

    查看下MySQL Proxy的版本

    $ mysql-proxy -V
    mysql-proxy: error while loading shared libraries: /usr/local/lib/libmysql-chassis.so.0: cannot restore segment prot after reloc: Permission denied

    报错,这是SELinux的问题,可如下解决

    $chcon -t texrel_shlib_t /usr/local/lib/libmysql-chassis.so.0

    $ mysql-proxy -V
    mysql-proxy 0.7.2
      glib2: 2.23.0
      libevent: 1.4.13-stable
      lua: Lua 5.1.4
        LUA_PATH: /usr/local/lib/mysql-proxy/lua/?.lua
        LUA_CPATH: /usr/local/lib/mysql-proxy/lua/?.so
    2009-12-18 00:05:34: (warning) g_set_prgname() called multiple times
      == plugins ==
      admin: 0.7.0
      proxy: 0.7.0

    至此MySQL Proxy安装完成,记住LUA_PATH: /usr/local/lib/mysql-proxy/lua/?.lua下面要用到

    启动,编译启动脚本,

    $vi /etc/init.d/mysql-proxy

    #!/bin/sh
    export LUA_PATH=/usr/local/lib/mysql-proxy/lua/?.lua

    mode=$1
    if [ -z "$mode" ] ; then
      mode="start"
    fi

    case $mode in
      'start')
        mysql-proxy --daemon \
    --admin-address=:4401 \
    --proxy-address=:3307 \
    --proxy-backend-addresses=:3306 \
    --proxy-read-only-backend-addresses=192.168.133.232:3306 \
    --proxy-read-only-backend-addresses=10.10.74.61:3306 \
    --proxy-lua-script=/usr/local/share/doc/mysql-proxy/rw-splitting.lua
        ;;

      'stop')
        killall mysql-proxy
        ;;

      'restart')
        if $0 stop ; then
          $0 start
        else
          echo  "retart failed!!!"
          exit 1
        fi
        ;;
    esac
    exit 0

    现在解释一下启动脚本:
    --daemon 采用daemon方式启动
    --admin-address=:4401 指定mysql proxy的管理端口,在这里,表示本机的4401端口
    --proxy-address=:3307 指定mysql proxy的监听端口,也可以用 127.0.0.1:3307 表示
    --proxy-backend-addresses=:3306 指定mysql主机的端口
    --proxy-read-only-backend-addresses=192.168.1.1:3306 指定只读的mysql主机端口
    --proxy-read-only-backend-addresses=192.168.1.2:3306 指定另一个只读的mysql主机端口
    --proxy-lua-script=/usr/local/share/mysql-proxy/rw-splitting.lua 指定lua脚本,在这里,使用的是rw-splitting脚本,用于读写分离

    (以上脚本内容摘自叶金荣blog )

    googlecode上也有mysql-proxy脚本也可以下下来修改使用

    $wget http://customcode.googlecode.com/files/mysql-proxy

    完整的参数可以运行以下命令查看:

    $mysql-proxy --help-all

    之后可以通过以下命令启动|停止|重启

    $ /etc/init.d/mysql-proxy start

    $ /etc/init.d/mysql-proxy stop

    $ /etc/init.d/mysql-proxy restart

    居然提示权限不够,不过简单

    $chmod +x /etc/init.d/mysql-proxy

    这样该ok了把,可能会报错类似于:

    /etc/init.d/mysql-proxy start
    2009-12-18 01:59:52: (warning) g_set_prgname() called multiple times
    2009-12-18 01:59:52: (critical) chassis.c:981: could not raise RLIMIT_NOFILE to 8192, Invalid argument (22). Current limit still 13815894353589044224.

    这个一个警告级别的错误,意思是MySQL Proxy在你的系统上不能把open files limit提升到8192,不过没关系的,MySQL Proxy依然好好的运行在你的电脑上.

    $mysql -h127.0.0.1 -uroot -p -P3307
    Enter password:
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 6
    Server version: 5.1.40-blang-debug-log Source distribution

    Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

    mysql> show processlist;
    +----+------+----------------+------+---------+------+-------+------------------+
    | Id | User | Host           | db   | Command | Time | State | Info             |
    +----+------+----------------+------+---------+------+-------+------------------+
    |  6 | root | localhost:3688 | NULL | Query   |    0 | NULL  | show processlist |
    +----+------+----------------+------+---------+------+-------+------------------+
    1 row in set (0.09 sec)

    可以看到,产生了一个新连接。

     

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