mysql讀寫分離

時間  2019-11-08
標籤 mysql 讀寫 分離 欄目 MySQL 简体版
原文   原文鏈接

環境是在先前配置mysql主從複製的2臺機器的基礎上（IP分別是10.10.10.13爲主服務器和10.10.10.14爲從服務器），啓用一臺10.10.10.12的機器安裝mysql-proxy進行讀寫分離實踐。mysql

 

mysql-proxy是一個MySQL的代理服務器，用戶的請求先發向mysql-proxy，而後mysql-proxy對用戶的數據包進行分析，從下一層的mysql 數據庫中選擇一臺數據庫，將用戶的請求包交給mysql處理。linux

 

一 ,MySQL-Proxy調度服務器上c++

檢查系統所需軟件包sql

yum -y install gcc* gcc-c++* autoconf* automake* zlib* libxml* ncurses-devel* libmcrypt* libtool* flex* pkgconfig* libevent* glib*數據庫

 

1，編譯安裝luavim

# wget http://www.lua.org/ftp/lua-5.1.5.tar.gz服務器

--2016-07-28 07:20:50--  http://www.lua.org/ftp/lua-5.1.5.tar.gzapp

Resolving www.lua.org... 148.251.24.173, 2a01:4f8:201:620f::2001tcp

Connecting to www.lua.org|148.251.24.173|:80... connected.測試

HTTP request sent, awaiting response... 200 OK

Length: 221213 (216K) [application/gzip]

Saving to: ua-5.1.5.tar.gz

 

100%[===========================================================================>] 221,213     30.7K/s   in 7.0s   

2016-07-28 07:21:01 (30.7 KB/s) - ua-5.1.5.tar.gzsaved [221213/221213]

 

2，下載完後發現系統竟然已經安裝了lua了。

#rpm -qa |grep lua

lua-5.1.4-4.1.e16.i686

#

3，那就開始安裝配置MySQL-Proxy

 

 

# wget http://mirrors.sohu.com/mysql/MySQL-Proxy/mysql-proxy-0.8.4-linux-rhel5-x86-32bit.tar.gz

--2016-07-28 07:50:05--  http://mirrors.sohu.com/mysql/MySQL-Proxy/mysql-proxy-0.8.4-linux-rhel5-x86-32bit.tar.gz

Resolving mirrors.sohu.com... 221.236.12.140

Connecting to mirrors.sohu.com|221.236.12.140|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 11825715 (11M) [application/octet-stream]

Saving to: ysql-proxy-0.8.4-linux-rhel5-x86-32bit.tar.gz

 

100%[===========================================================================>] 11,825,715   562K/s   in 21s    

 

2016-07-28 07:50:26 (556 KB/s) - ysql-proxy-0.8.4-linux-rhel5-x86-32bit.tar.gzsaved [11825715/11825715]

#tar zxvf mysql-proxy-0.8.4-linux-rhel5-x86-32bit.tar.gz -C /opt/

#mv /opt/mysql-proxy-0.8.4-linux-rhel5-x86-32bit /opt/mysql-proxy

#vi mysql-proxy

內容以下

#!/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=/usr/local/bin

PROXY_PATH=/opt/mysql-proxy/bin

 

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_OPTIONS=" --proxy-read-only-backend-addresses=10.10.10.14:3306 --proxy-backend-addresses=10.10.10.13:3306   --proxy-lua-script=/opt/mysql-proxy/scripts/rw-splitting.lua"

PROXY_PID=/opt/mysql-proxy/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: "

$NICELEVEL $PROXY_PATH/mysql-proxy $PROXY_OPTIONS --daemon --pid-file=$PROXY_PID --user=mysql --log-level=warning --log-

 

file=/opt/mysql-proxy/log/mysql-proxy.log

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

5，設置執行環境

#cp mysql-proxy /opt/mysql-proxy/init.d/

#chmod +x /opt/mysql-proxy/init.d/mysql-proxy

#mkdir /opt/mysql-proxy/run

#mkdir /opt/mysql-proxy/log

#mkdir /opt/mysql-proxy/scripts

6，配置並使用rw-splitting.lua讀寫分離腳本

[root@hd2 mysql-proxy]# find ./ -name *split*

./share/doc/mysql-proxy/rw-splitting.lua

[root@hd2 mysql-proxy]# cp ./share/doc/mysql-proxy/rw-splitting.lua  /opt/mysql-proxy/scripts

[root@hd2 mysql-proxy]# vim /opt/mysql-proxy/scripts/rw-splitting.lua

修改讀寫分離腳本rw-splitting.lua，修改默認鏈接，進行快速測試，不修改的話要達到鏈接數爲4時才啓用讀寫分離

if not proxy.global.config.rwsplit then                                                           

        proxy.global.config.rwsplit = {                                                           

                min_idle_connections = 1,

                max_idle_connections = 1,

                                                                                                  

                is_debug = false                                                                   

        }                                                                                         

end                                         

7，修改完成後，啓動mysql-proxy

 

[root@hd2 mysql-proxy]# /opt/mysql-proxy/init.d/mysql-proxy start

Starting mysql-proxy:

[root@hd2 mysql-proxy]# more log/mysql-proxy.log

2016-07-28 08:31:37: (critical) plugin proxy 0.8.4 started

[root@hd2 mysql-proxy]# ps aux |grep pro

mysql     7879  0.0  0.2   3912  1256 ?        S    08:31   0:00 /opt/mysql-proxy/libexec/mysql-proxy --proxy-read-only-backend-addresses=10.10.10.14:3306 --proxy-backend-addresses=10.10.10.13:3306 --proxy-lua-script=/opt/mysql-proxy/scripts/rw-splitting.lua --daemon --pid-file=/opt/mysql-proxy/run/mysql-proxy.pid --user=mysql --log-level=warning --log-file=/opt/mysql-proxy/log/mysql-proxy.log

root      7886  0.0  0.1   4356   732 pts/2    S+   08:32   0:00 grep pro

[root@hd2 mysql-proxy]#

 

二，準備測試讀寫分離效果

 

1，主服務器上建立用於讀寫分離的數據庫鏈接用戶

mysql> GRANT ALL ON *.* TO 'myproxy'@'%' IDENTIFIED BY 'password';           

Query OK, 0 rows affected (0.00 sec)

 

mysql> select * from fuck;

+------+------+

| id   | name |

+------+------+

|    1 | abcd |

|    9 | fst  |

+------+------+

2 rows in set (0.00 sec)

 

mysql>

 

2，因爲咱們配置了主從複製功能，所以從數據庫服務器10.10.10.14上已經同步了此操做

 

3，爲了測試讀寫分離的效果，暫時關閉MySQL主從複製功能

登錄從數據庫服務器10.10.10.14，經過命令行登陸管理MySQL服務器

/opt/mysql/bin/mysql -uroot -p'aaaaaa'

關閉Slave同步進程

mysql> stop slave;

Query OK, 0 rows affected (0.00 sec)

4，在mysql-proxy上（10.10.10.12）鏈接主服務器測試

# mysql -uproxy1 -p'password'  -h10.10.10.13

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 9

Server version: 5.1.73-log Source distribution

 

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> use fuck;

Database changed

mysql> insert into fuck  values(009,'fst');

Query OK, 1 row affected (0.00 sec)

 

mysql> select * from fuck;

+------+------+

| id   | name |

+------+------+

|    1 | abcd |

|    9 | fst  |

+------+------+

2 rows in set (0.01 sec)

 

mysql>

5，從服務器此時狀況

mysql> select * from fuck;

+------+-------+

| id   | name  |

+------+-------+

|    1 | abcd  |

+------+-------+

1 rows in set (0.00 sec)

 

mysql>

說明沒有發生任何改變，沒有新記錄存在，已經實現了MySQL讀寫分離，目前全部的寫操做都所有在Master主服務器上。

 

6，客戶端鏈接測試

先看看mysql-proxy服務端口

# netstat -nltp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name  

tcp        0      0 0.0.0.0:4040                0.0.0.0:*                   LISTEN      7879/mysql-proxy   

 

再在客戶端上鍊接（客戶端需有mysql的client端，沒有就yum -y install mysql安裝一下，很快的）

# mysql -uproxy1 -ppassword -h 10.10.10.12 --port 4040

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 10

Server version: 5.1.73-log Source distribution

 

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>

mysql> use fuck;

Database changed

mysql> select * from fuck;

+------+------+

| id   | name |

+------+------+

|    1 | abcd |

|    9 | fst  |

+------+------+

2 rows in set (0.00 sec)

 

從服務器上看見的內容

# tcpdump -i eth1 port 3306

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes

 

00:20:46.163384 IP 10.10.10.12.45070 > 10.10.10.13.mysql: Flags [P.], seq 46:69, ack 265, win 658, options [nop,nop,TS val 61366259 ecr 94221439], length 23

00:20:46.163622 IP 10.10.10.13.mysql > 10.10.10.12.45070: Flags [P.], seq 265:397, ack 69, win 453, options [nop,nop,TS val 94222286 ecr 61366259], length 132

00:20:46.163668 IP 10.10.10.12.45070 > 10.10.10.13.mysql: Flags [.], ack 397, win 691, options [nop,nop,TS val 61366260 ecr 94222286], length 0

00:20:46.707339 IP 10.10.10.12.45070 > 10.10.10.13.mysql: Flags [P.], seq 69:92, ack 397, win 691, options [nop,nop,TS val 61366803 ecr 94222286], length 23

00:20:46.707639 IP 10.10.10.13.mysql > 10.10.10.12.45070: Flags [P.], seq 397:529, ack 92, win 453, options [nop,nop,TS val 94222830 ecr 61366803], length 132

00:20:46.707724 IP 10.10.10.12.45070 > 10.10.10.13.mysql: Flags [.], ack 529, win 725, options [nop,nop,TS val 61366804 ecr 94222830], length 0

^C

12 packets captured

13 packets received by filter

0 packets dropped by kernel

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