安裝配置mysql-proxy

標籤：mysql   function   local   

4.1 下載所需要的版本，這裡的系統平台為rhel6.4 32位系統，因此就以mysql-proxy-0.8.3-linux-glibc2.3-x86-32bit.tar.gz為例。

# tar xf mysql-proxy-0.8.3-linux-glibc2.3-x86-32bit.tar.gz -C /usr/local
# cd /usr/local
# ln -sv mysql-proxy-0.8.3-linux-glibc2.3-x86-32bit  mysql-proxy

添加代理使用者
# useradd mysql-proxy

4.2 為mysql-proxy提供SysV服務指令碼，內容如下所示

#!/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

將上述內容儲存為/etc/rc.d/init.d/mysql-proxy，給予執行許可權，而後加入到服務列表。
# chmod +x /etc/rc.d/init.d/mysql-proxy
# chkconfig --add mysql-proxy

mysql-proxy --daemon --log-level=debug --log-file=/var/log/mysql-proxy.log --plugins="proxy" --proxy-backend-addresses="172.16.0.106:3306" --proxy-read-only-backend-addresses="172.16.100.107:3306"

tail /var/log/mysql-proxy.log
netstat -tlnp
4040

主
grant all on *.* to [email protected]‘%‘ identified by ‘nihao201314‘
flush privileges

mysql -uroot -p -h 172.16.100.201 --port=4040     201 proxy
show global variables like ‘%dns%‘
show global variables like ‘%hostname%‘
show global variables like ‘%name%‘
skip_name_resolve     off
set @@global.skip_name_resolve=ON


killall mysql-proxy

mysql-proxy --daemon --log-level=debug --log-file=/var/log/mysql-proxy.log --plugins="proxy" --proxy-backend-addresses="172.16.0.106:3306" --proxy-read-only-backend-addresses="172.16.100.107:3306"  --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua"






4.3 為服務指令碼提供設定檔/etc/sysconfig/mysql-proxy，內容如下所示：

# 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"


其中最後一行，需要按實際情境進行修改，例如：
PROXY_OPTIONS="--daemon --log-level=info --log-file="/var/log/mysql-proxy.log" --plugins=proxy --plugins=admin --proxy-backend-addresses=172.16.100.6:3306 --proxy-read-only-backend-addresses=172.16.100.7:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua"

其中的proxy-backend-addresses選項和proxy-read-only-backend-addresses選項均可重複使用多次，以實現指定多個讀寫伺服器或唯讀伺服器。

service mysql-proxy
mysql -uadmin -padmin -h172.16.100.107 --port=4040 -e ‘‘

4.4 mysql-proxy的配置選項

mysql-proxy的配置選項大致可分為協助選項、管理選項、代理選項及應用程式選項幾類，下面一起去介紹它們。
 
--help
--help-admin
--help-proxy
--help-all ———— 以上四個選項均用於擷取協助資訊；

--proxy-address=host:port ———— 代理服務監聽的地址和連接埠；
--admin-address=host:port ———— 管理模組監聽的地址和連接埠；
--proxy-backend-addresses=host:port ———— 後端mysql伺服器的地址和連接埠；
--proxy-read-only-backend-addresses=host:port ———— 後端唯讀mysql伺服器的地址和連接埠；
--proxy-lua-script=file_name ———— 完成mysql代理功能的Lua指令碼；
--daemon ———— 以守護進程模式啟動mysql-proxy；
--keepalive ———— 在mysql-proxy崩潰時嘗試重啟之；
--log-file=/path/to/log_file_name ———— 記錄檔名稱；
--log-level=level ———— 記錄層級；
--log-use-syslog ———— 基於syslog記錄日誌；
--plugins=plugin,.. ———— 在mysql-proxy啟動時載入的外掛程式；
--user=user_name ———— 運行mysql-proxy進程的使用者；
--defaults-file=/path/to/conf_file_name ———— 預設使用的設定檔路徑；其配置段使用[mysql-proxy]標識；
--proxy-skip-profiling ———— 禁用profile；
--pid-file=/path/to/pid_file_name ———— 進程檔案名稱；




5、複製如下內容建立admin.lua檔案，將其儲存至/usr/local/mysql-proxy/share/doc/mysql-proxy/目錄中。

--[[ $%BEGINLICENSE%$
 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

mysql-proxy --daemon --log-level=debug --log-file=/var/log/mysql-proxy.log --plugins="proxy" --proxy-backend-addresses="172.16.0.106:3306" --proxy-read-only-backend-addresses="172.16.100.107:3306"  --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua" --plugins=admin --admin-username="admin" --admin-password="admin" --admin-lua-script="/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua"



/usr/local/mysql-proxy/bin/mysql-proxy --daemon --log-level=debug --log-file=/var/log/mysql-proxy.log --plugins="proxy" --proxy-backend-addresses="172.23.208.39:3306" --proxy-read-only-backend-addresses="172.23.208.40:3306" --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua  --plugins=admin --admin-username="admin" --admin-password="admin" --admin-lua-script="/usr/local/mysql-proxy/share/doc/mysql-proxy/admin.lua"


tail /var/log/mysql-proxxy.log
4040   4041管理介面  


6、測試

6.1 管理功能測試

# mysql -uadmin -padmin -h172.16.100.107 --port=4041

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.99-agent-admin

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the buffer.

mysql> SELECT * FROM backends;
+-------------+-------------------+-------+------+------+-------------------+
| backend_ndx | address           | state | type | uuid | connected_clients |
+-------------+-------------------+-------+------+------+-------------------+
|           1 | 172.16.100.6:3306 | up    | rw   | NULL |                 0 |
|           2 | 172.16.100.7:3306 | up    | ro   | NULL |                 0 |
+-------------+-------------------+-------+------+------+-------------------+
2 rows in set (0.00 sec)

6.2 讀寫分離測試

# mysql -uroot -pmagedu.com -h172.16.100.107 --port=4040


  mysql-proxy --daemon --defaults-file="/etc/mysql-proxy.cnf"

安裝配置mysql-proxy