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/?.luamode=$1
if [ -z "$mode" ] ; then
mode="start"
ficase $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 distributionType '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。