一）实验环境
| Mysql-Porxy代理器 | 192.168.1.130 | mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit.tar.gz |
| Mysql主 | 192.168.1.122 | mysql-5.5.33-linux2.6-x86_64.tar.gz |
| Mysql从 | 192.168.1.120 | mysql-5.5.33-linux2.6-x86_64.tar.gz |
mysql主从复制请参考http://shunzi.blog.51cto.com/8289655/1394383
本文主要演示mysql-porxy实现读写分离的操作，在192.168.1.130上实行
yum -y install mysql安装上mysql，不用启动。
1）解压，并创建用户
tar xf mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit.tar.gz -C /usr/local/ [root@localhost ~]# cd /usr/local/ [root@localhost local]# ln -sv mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit mysql-proxy mysql-proxy' -> `mysql-proxy-0.8.3-linux-glibc2.3-x86-64bit [root@localhost local]# useradd mysql-proxy
2）为mysql-proxy提供sysv服务脚本
vim /etc/rc.d/init.d/mysql-proxy
#!/bin/bash
# mysql-proxy This script starts and stops the mysql-proxy daemon
#
# chkconfig: - 78 30
# processname: mysql-proxy
# description: mysql-proxy is a proxy daemon for mysql
# Source function library.
. /etc/rc.d/init.d/functions
prog="/usr/local/mysql-proxy/bin/mysql-proxy"
# Source networking configuration.
if [ -f /etc/sysconfig/network ]; then
. /etc/sysconfig/network
fi
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
# Set default mysql-proxy configuration.
ADMIN_USER="admin"管理用户
ADMIN_PASSWD="admin"管理密码
ADMIN_LUA_SCRIPT="/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua" 指定lua脚本
PROXY_OPTIONS="--daemon"运行在后台
PROXY_PID=/var/run/mysql-proxy.pid指定pid文件
PROXY_USER="mysql-proxy"以什么用户运行
# Source mysql-proxy configuration.
if [ -f /etc/sysconfig/mysql-proxy ]; then
. /etc/sysconfig/mysql-proxy
fi
RETVAL=0
start() {
echo -n $"Starting $prog: "
daemon $prog $PROXY_OPTIONS --pid-file=$PROXY_PID --proxy-address="$PROXY_ADDRESS" --user=$PROXY_USER --admin-username="$ADMIN_USER" --admin-lua-script="$ADMIN_LUA_SCRIPT" --admin-password="$ADMIN_PASSWORD"
RETVAL=$?
echo
if [ $RETVAL -eq 0 ]; then
touch /var/lock/subsys/mysql-proxy
fi
}
stop() {
echo -n $"Stopping $prog: "
killproc -p $PROXY_PID -d 3 $prog
RETVAL=$?
echo
if [ $RETVAL -eq 0 ]; then
rm -f /var/lock/subsys/mysql-proxy
rm -f $PROXY_PID
fi
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
condrestart|try-restart)
if status -p $PROXY_PIDFILE $prog >&/dev/null; then
stop
start
fi
;;
status)
status -p $PROXY_PID $prog
;;
*)
echo "Usage: $0 {start|stop|restart|reload|status|condrestart|try-restart}"
RETVAL=1
;;
esac
exit $RETVAL
chmod +x /etc/rc.d/init.d/mysql-proxy
chkconfig --add mysql-proxy
vim /etc/sysconfig/mysql-proxy # Options for mysql-proxy ADMIN_USER="admin" ADMIN_PASSWORD="admin" ADMIN_ADDRESS="" ADMIN_LUA_SCRIPT="/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua" PROXY_ADDRESS="" PROXY_USER="mysql-proxy" PROXY_OPTIONS="--daemon --log-level=info --log-use-syslog --plugins=proxy --plugins=admin --proxy-backend-addresses=192.168.1.122:3306 --proxy-read-only-backend-addresses=192.168.1.120:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua" 上面的ip是主从的ip地址
创建admin管理脚本
vim share/doc/mysql-proxy/admin.lua
--[[ $%BEGINLICENSE%$
Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the
License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
$%ENDLICENSE%$ --]]
function set_error(errmsg)
proxy.response = {
type = proxy.MYSQLD_PACKET_ERR,
errmsg = errmsg or "error"
}
end
function read_query(packet)
if packet:byte() ~= proxy.COM_QUERY then
set_error("[admin] we only handle text-based queries (COM_QUERY)")
return proxy.PROXY_SEND_RESULT
end
local query = packet:sub(2)
local rows = { }
local fields = { }
if query:lower() == "select * from backends" then
fields = {
{ name = "backend_ndx",
type = proxy.MYSQL_TYPE_LONG },
{ name = "address",
type = proxy.MYSQL_TYPE_STRING },
{ name = "state",
type = proxy.MYSQL_TYPE_STRING },
{ name = "type",
type = proxy.MYSQL_TYPE_STRING },
{ name = "uuid",
type = proxy.MYSQL_TYPE_STRING },
{ name = "connected_clients",
type = proxy.MYSQL_TYPE_LONG },
}
for i = 1, #proxy.global.backends do
local states = {
"unknown",
"up",
"down"
}
local types = {
"unknown",
"rw",
"ro"
}
local b = proxy.global.backends[i]
rows[#rows + 1] = {
i,
b.dst.name, -- configured backend address
states[b.state + 1], -- the C-id is pushed down starting at 0
types[b.type + 1], -- the C-id is pushed down starting at 0
b.uuid, -- the MySQL Server's UUID if it is managed
b.connected_clients -- currently connected clients
}
end
elseif query:lower() == "select * from help" then
fields = {
{ name = "command",
type = proxy.MYSQL_TYPE_STRING },
{ name = "description",
type = proxy.MYSQL_TYPE_STRING },
}
rows[#rows + 1] = { "SELECT * FROM help", "shows this help" }
rows[#rows + 1] = { "SELECT * FROM backends", "lists the backends and their state" }
else
set_error("use 'SELECT * FROM help' to see the supported commands")
return proxy.PROXY_SEND_RESULT
end
proxy.response = {
type = proxy.MYSQLD_PACKET_OK,
resultset = {
fields = fields,
rows = rows
}
}
return proxy.PROXY_SEND_RESULT
end
启动mysql-proxy
/etc/init.d/mysql-proxy start
查看端口：4041，3306已经启动
[root@localhost ~]# ss -lnt State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 :::111 :::* LISTEN 0 128 *:111 *:* LISTEN 0 128 :::22 :::* LISTEN 0 128 *:22 *:* LISTEN 0 128 127.0.0.1:631 *:* LISTEN 0 128 ::1:631 :::* LISTEN 0 128 :::36695 :::* LISTEN 0 100 ::1:25 :::* LISTEN 0 100 127.0.0.1:25 *:* LISTEN 0 128 *:51321 *:* LISTEN 0 128 127.0.0.1:6011 *:* LISTEN 0 128 ::1:6011 :::* LISTEN 0 128 127.0.0.1:6012 *:* LISTEN 0 128 ::1:6012 :::* LISTEN 0 128 *:4041 *:* LISTEN 0 128 *:3306 *:*
连接测试
[root@localhost ~]# mysql -uadmin -padmin -h192.168.1.130 --port=4041
登陆进去后发现能使用的命令很少，但是能查看你的服务器哪些是读写的
mysql> select * from backends; +-------------+--------------------+---------+------+------+-------------------+ | backend_ndx | address | state | type | uuid | connected_clients | +-------------+--------------------+---------+------+------+-------------------+ | 1 | 192.168.1.122:3306 | unknown | rw | NULL | 0 | | 2 | 192.168.1.120:3306 | unknown | ro | NULL | 0 | +-------------+--------------------+---------+------+------+-------------------+ 2 rows in set (0.00 sec)
去主服务器创建能连接的账号
mysql> grant all on *.* to 'admin'@'192.168.%.%' identified by 'admin'; Query OK, 0 rows affected (0.07 sec) mysql> flush privileges; Query OK, 0 rows affected (0.03 sec)
在mysql-proxy服务器连接通过在主服务创建的账号
[root@localhost mysql-proxy]# mysql -uadmin -padmin -h192.168.1.130 --port=3306 Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.5.33-log MySQL Community Server (GPL) Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
端口也可以加，默认就是3306.
mysql> select * from backends; +-------------+--------------------+-------+------+------+-------------------+ | backend_ndx | address | state | type | uuid | connected_clients | +-------------+--------------------+-------+------+------+-------------------+ | 1 | 192.168.1.122:3306 | up | rw | NULL | 0 | | 2 | 192.168.1.120:3306 | up | ro | NULL | 0 | +-------------+--------------------+-------+------+------+-------------------+ 2 rows in set (0.00 sec)
通过抓包看效果。 [root@station141 ~]# tcpdump -i eth0 -nn -XX dst host 192.168.1.122 and tcp dst port 3306 [root@station141 ~]# tcpdump -i eth0 -nn -XX dst host 192.168.1.120 and tcp dst port 3306
ps：
主服务器状态很快就能显示，从服务器看效果有点慢。主从分离操作完成。