mysql-proxy具有代理的功能,将客户端的mysql请求轮询至后台的mysql-server。
环境介绍:
一台mysql-proxy(178)
两台mysql-server(180,122)
一台mysql-client(254)
在mysql-proxy上安装如下包:
1.安装 pkg-config:(在RHEL6上默认已经安装,不需安装)
tar zxvf pkg-config-0.23.tar.gz
cd pkg-config-0.23
./configure
make
make install
确保 PKG_CONFIG_PATH 环境变量包含了相关的 pkg-config 配置文件路径:
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
(如果是系统自带的pkg-config 则export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/pkgconfig)
2.安装 libevent:
tar zxvf libevent-1.4.10-stable.tar.gz
cd libevent-1.4.10-stable
./configure
make
make install
3.安装 glib:
tar zxvf glib-2.20.0.tar.gz
cd glib-2.20.0
./configure
make
make install
4.安装 lua:
tar zxvf lua-5.1.4.tar.gz
cd lua-5.1.4
如果你的服务器是 64 位的,这时要调整一下 Makefile:vi src/Makefile,在 CFLAGS 里
加上-fPIC,否则会出错:
接下来不用执行常见的 configure,直接 make:
make linux
make install
5.安装 mysql-proxy:
安装 pkg-config 配置文件,以便编译 mysql-proxy 时能找到 lua:
cp etc/lua.pc /usr/local/lib/pkgconfig/lua.pc
如果没有执行此步骤的话,在编译安装 mysql-proxy 的时候,会得到类似下面的错误
信息:
Package lua5.1 was not found in the pkg-config search path.
Perhaps you should add the directory containing `lua5.1.pc'
to the PKG_CONFIG_PATH environment variable
No package 'lua5.1' found
tar zxvf mysql-proxy-0.7.0.tar.gz
cd mysql-proxy-0.7.0
./configure
make
make install
按照官方介绍做好启动脚本/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=/opt/mysql-proxy/sbin prog="mysql-proxy" # Source networking configuration. . /etc/sysconfig/network # Check that networking is up. [ ${NETWORKING} = "no" ] && exit 0 # Set default mysql-proxy configuration. PROXY_OPTIONS="--daemon" PROXY_PID=/var/run/mysql-proxy.pid # Source mysql-proxy configuration. if [ -f /etc/sysconfig/mysql-proxy ] ; then . /etc/sysconfig/mysql-proxy fi PATH=$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: " daemon $NICELEVEL $PROXY_PATH/mysql-proxy $PROXY_OPTIONS --pid-file $PROXY_PID RETVAL=$? 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
chmod 755 /etc/init.d/mysql-proxy
chmod +x /etc/init.d/mysql-proxy
接下来要修改参数脚本/etc/sysconfig/mysql-proxy,在其中加入如下语句:
PROXY_OPTIONS="--proxy-backend-address=192.168.0.180:3306 --proxy-backend-addresses=192.168.0.122:3306 --daemon"
#service mysql-proxy start 会出现警告信息(ulimit -n 8192)
测试:
在 180上建数据库 DB1|t1|180
在 122上建数据库 DB1|t1|122
监听端口4040
设置grant语句
180>GRANT ALL PRIVILEGES on *.* to root@192.168.0.178 identified by '******'
122>GRANT ALL PRIVILEGES on *.* to root@192.168.0.178 identified by '******'
#iptables -I INPUT 1 -d 192.168.0.122/24 -p tcp --dport 3306 -j accept
#iptables -I INPUT 1 -d 192.168.0.180/24 -p tcp --dport 3306 -j accept
#mysql -uroot -p****** -P 4040 -h 192.168.0.178
测试时终端不要退,退了会看不出结果。(轮询)
二 读写分离
#mysql-proxy --help-all
查看得知 -b 可读写 -r 只读
在mysql-proxy源代码lib目录中 有读写分离脚本(rw-splitting.lua)
#cp rw-splitting.lua /usr/local/share 复制读写分离脚本到随便一个目录。
#vi /etc/sysconfig/mysql-proxy
PROXY_OPTIONS="-P 192.168.0.178:3306 -b 192.168.0.253 -r 192.168.0.252 -r 192.168.0.251 -r 192.168.0.250 -s /usr/local/share --daemon"
测试可以实现读写分离。