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将以下脚本保存为/etc/init.d/mysql-proxy ，赋予权限
chmod 755 /etc/init.d/mysql-proxy
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | #!/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" ADMIN_PASSWD= "admin" ADMIN_LUA_SCRIPT= "/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua" PROXY_OPTIONS= "--daemon" PROXY_PID= /var/run/mysql-proxy .pid PROXY_USER= "mysql-proxy" # 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 |
2.为服务脚本提供配置文件/etc/sysconfig/mysql-proxy，内容如下所示：
| 1 2 3 4 5 6 7 8 | # 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" |
#注意最后一行，需要根据实际生产场景进行修改，比如;
PROXY_OPTIONS="--daemon --log-level=info --log-file=/var/log/mysql-proxy.log --plugins=proxy
--plugins=admin --proxy-backend-addresses=192.168.141.101:3306 --proxy-read-only-backend-ad
dresses=192.168.141.102:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy
/rw-splitting.lua"
3.复制如下内容建立admin.lua文件，将其保存至/usr/local/mysql-proxy/share/doc/mysql-proxy/目录中:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | --[[ $%BEGINLICENSE%$ 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 |
本文转自limingyu0312 51CTO博客，原文链接：http://blog.51cto.com/limingyu/1933927，如需转载请自行联系原作者