mysql ——读写分离
一、实验环境：
server1：master 172.24.54.1
server2：slave 172.25.54.2 主从复制
server3：mysql-proxy代理 172.25.54.3
此实验在mysql的主从复制的基础上进行, 需要配备好主从的环境
二、配置server3
[root@server3 ~]# ls
mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz
[root@server3 ~]# tar zxf mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz
mysql-proxy-0.8.5-linux-el6-x86-64bit mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz
[root@server3 ~]# mv mysql-proxy-0.8.5-linux-el6-x86-64bit /usr/local/mysql-proxy
[root@server3 ~]# cd /usr/local/mysql-proxy/
[root@server3 mysql-proxy]# ls
bin include lib libexec licenses share
[root@server3 mysql-proxy]# mkdir conf
[root@server3 mysql-proxy]# mkdir logs
[root@server3 mysql-proxy]# vim ~/.bash_profile
[root@server3 mysql-proxy]# cat ~/.bash_profile
//修改第10行
10 PATH=$PATH:$HOME/bin:/usr/local/mysql-proxy/bin
[root@server3 mysql-proxy]# source ~/.bash_profile
[root@server3 mysql-proxy]# vim conf/mysql-proxy.conf
[mysql-proxy]
user=root //运行mysql-proxy进程的用户
proxy-address=0.0.0.0:3306 //监听本机所有地址的3306端口
proxy-backend-addresses=172.25.54.1:3306 //backend主 注意addresses
proxy-read-only-backend-addresses=172.25.54.2:3306 //backend从
proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua
//lua脚本地址
log-file=/usr/local/mysql-proxy/logs/mysql-proxy //proxy日志路径
log-level=debug //日志级别
daemon=true //打入后台
keepalive=true //在mysql-proxy崩溃时尝试重启之
[root@server3 mysql-proxy]# chmod 660 conf/mysql-proxy.conf
[root@server3 mysql-proxy]# vim /usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua
//修改最大最小链接数，最大链接两个, 超过则会读写分离
38 if not proxy.global.config.rwsplit then
39 proxy.global.config.rwsplit = {
40 min_idle_connections = 1,
41 max_idle_connections = 2,
42
43 is_debug = false
44 }
[root@server3 mysql-proxy]# mysql-proxy --defaults-file=/usr/local/mysql-proxy/conf/mysql-proxy.conf
//启动mysql-proxy
[root@server3 mysql-proxy]# netstat -antpl
主库授权
mysql> grant all on *.* to 'root'@'%' identified by '5820hhXM!@#';
Query OK, 0 rows affected, 1 warning (0.37 sec)三、测试
物理机
//客户端1
[root@foundation54 ~]# mysql -h 172.25.54.3 -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 14
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)] select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
+----------+----------+
1 row in set (0.00 sec)
MySQL [(none)] insert into test.userlist values ('user2','258');
Query OK, 1 row affected (0.34 sec)
MySQL [(none)] select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
+----------+----------+
2 rows in set (0.00 sec)server1
mysql> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
+----------+----------+
2 rows in set (0.00 sec)server2
mysql> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
+----------+----------+
2 rows in set (0.00 sec)server1、server2
yum install -y lsof
//此时只有一个客户端开启
[root@server1 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2367 mysql 33u IPv6 11154 0t0 TCP server1:mysql->server2:51784 (ESTABLISHED)
mysqld 2367 mysql 34u IPv6 11108 0t0 TCP *:mysql (LISTEN)
mysqld 2367 mysql 62u IPv6 11186 0t0 TCP server1:mysql->server3:44796 (ESTABLISHED)
[root@server1 ~]#[root@server2 ~]# yum install -y lsof
[root@server2 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2841 mysql 32u IPv6 11743 0t0 TCP *:mysql (LISTEN)
mysqld 2841 mysql 60u IPv4 11809 0t0 TCP server2:51784->server1:mysql (ESTABLISHED)
[root@server2 ~]# 物理机
此时增加一个客户端链接——客户端2
//客户端2
[root@foundation54 ~]# mysql -h 172.25.54.3 -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
+----------+----------+
2 rows in set (0.00 sec)
MySQL [(none)]> insert into test.userlist values ('user3','369');
Query OK, 1 row affected (0.15 sec)
MySQL [(none)]> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
+----------+----------+
3 rows in set (0.00 sec)server1、server2
//server1、server2
mysql> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
+----------+----------+
3 rows in set (0.00 sec)
//客户端1
MySQL [(none)]> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
+----------+----------+
3 rows in set (0.00 sec)[root@server1 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2367 mysql 33u IPv6 11154 0t0 TCP server1:mysql->server2:51784 (ESTABLISHED)
mysqld 2367 mysql 34u IPv6 11108 0t0 TCP *:mysql (LISTEN)
mysqld 2367 mysql 50u IPv6 11458 0t0 TCP server1:mysql->server3:44797 (ESTABLISHED)
mysqld 2367 mysql 62u IPv6 11186 0t0 TCP server1:mysql->server3:44796 (ESTABLISHED)
[root@server1 ~]#[root@server2 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2841 mysql 32u IPv6 11743 0t0 TCP *:mysql (LISTEN)
mysqld 2841 mysql 60u IPv4 11809 0t0 TCP server2:51784->server1:mysql (ESTABLISHED)
[root@server2 ~]# 物理机
此时增加一个客户端链接——客户端3
//客户端3
[root@foundation54 ~]# mysql -h 172.25.54.3 -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.7.17-log MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MySQL [(none)]> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
+----------+----------+
3 rows in set (0.00 sec)server1、server2
[root@server1 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2367 mysql 33u IPv6 11154 0t0 TCP server1:mysql->server2:51784 (ESTABLISHED)
mysqld 2367 mysql 34u IPv6 11108 0t0 TCP *:mysql (LISTEN)
mysqld 2367 mysql 50u IPv6 11458 0t0 TCP server1:mysql->server3:44797 (ESTABLISHED)
mysqld 2367 mysql 62u IPv6 11186 0t0 TCP server1:mysql->server3:44796 (ESTABLISHED)
[root@server1 ~]#[root@server2 ~]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 2841 mysql 32u IPv6 11743 0t0 TCP *:mysql (LISTEN)
mysqld 2841 mysql 48u IPv6 12507 0t0 TCP server2:mysql->server3:47313 (ESTABLISHED)
mysqld 2841 mysql 60u IPv4 11809 0t0 TCP server2:51784->server1:mysql (ESTABLISHED)
[root@server2 ~]# 客户端3是与从库server2相连接的
在客户端3上写入，然后在server1即masetr上访问
//客户端3
MySQL [(none)]> insert into test.userlist values ('user4','666');
Query OK, 1 row affected (0.09 sec)
MySQL [(none)]> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
| user4 | 666 |
+----------+----------+
4 rows in set (0.00 sec)server1
mysql> select * from test.userlist;
+----------+----------+
| username | password |
+----------+----------+
| user1 | 147 |
| user2 | 258 |
| user3 | 369 |
| user4 | 666 |
+----------+----------+
4 rows in set (0.00 sec)虽然客户端3是与从库server2相连接的, 但是当在客户端3写入时，还是写入到了master上
yum install -y tcpdump 抓包工具, 可以在proxy端安装，抓包查看