MySQL-Proxy实现读写分离
环境
| hostname | ip |
|---|---|
| proxy | 192.168.220.130 |
| master(mysql主，负责写) | 192.168.220.128 |
| slave(mysql从，负责读) | 192.168.220.129 |
数据库安装(略)
https://blog.csdn.net/DoloresOOO/article/details/97392449
数据库主从复制(略)
https://blog.csdn.net/DoloresOOO/article/details/98095394
环境配置
安装支持LUA语言环境,3个节点都安装
[root@proxy ~]# yum install lua -y
[root@master ~]# yum install lua -y
[root@slave ~]# yum install lua -y
下载mysql-proxy包
[root@proxy ~]# wget https://downloads.mysql.com/archives/get/file/mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz
解压包
[root@proxy ~]# tar zxvf mysql-proxy-0.8.5-linux-el6-x86-64bit.tar.gz
[root@proxy ~]# mv mysql-proxy-0.8.5-linux-el6-x86-64bit /usr/local/mysql-proxy
[root@proxy ~]# ls /usr/local/mysql-proxy/share/doc/mysql-proxy/
active-queries.lua ro-balance.lua tutorial-resultset.lua
active-transactions.lua ro-pooling.lua tutorial-rewrite.lua
admin-sql.lua rw-splitting.lua tutorial-routing.lua
analyze-query.lua tutorial-basic.lua tutorial-scramble.lua
auditing.lua tutorial-constants.lua tutorial-states.lua
commit-obfuscator.lua tutorial-inject.lua tutorial-tokenize.lua
commit-obfuscator.msc tutorial-keepalive.lua tutorial-union.lua
COPYING tutorial-monitor.lua tutorial-warnings.lua
histogram.lua tutorial-packets.lua xtab.lua
load-multi.lua tutorial-prep-stmts.lua
README tutorial-query-time.lua
修改环境变量
[root@proxy ~]# echo "export PATH=$PATH:/usr/local/mysql-proxy/bin" >> /etc/profile
[root@proxy ~]# source /etc/profile
配置文件
[root@proxy ~]# vim /usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua
40 min_idle_connections = 4,
41 max_idle_connections = 8,
修改为
40 min_idle_connections = 1,
41 max_idle_connections = 1,
意思是当有一个链接的时候，就实现读写分离的功能。改为1这里进行测试
[root@proxy ~]# mysql-proxy --help-all
Usage:
mysql-proxy [OPTION...] - MySQL Proxy
Help Options:
-?, --help Show help options
--help-all Show all help options
--help-proxy Show options for the proxy-module
proxy-module
-P, --proxy-address=<host:port> listening address:port of the proxy-server (default: :4040)
-r, --proxy-read-only-backend-addresses=<host:port> address:port of the remote slave-server (default: not set)
-b, --proxy-backend-addresses=<host:port> address:port of the remote backend-servers (default: 127.0.0.1:3306)
--proxy-skip-profiling disables profiling of queries (default: enabled)
--proxy-fix-bug-25371 fix bug #25371 (mysqld > 5.1.12) for older libmysql versions
-s, --proxy-lua-script=<file> filename of the lua script (default: not set)
--no-proxy don't start the proxy-module (default: enabled)
--proxy-pool-no-change-user don't use CHANGE_USER to reset the connection coming from the pool (default: enabled)
--proxy-connect-timeout connect timeout in seconds (default: 2.0 seconds)
--proxy-read-timeout read timeout in seconds (default: 8 hours)
--proxy-write-timeout write timeout in seconds (default: 8 hours)
Application Options:
-V, --version Show version
--defaults-file=<file> configuration file
--verbose-shutdown Always log the exit code when shutting down
--daemon Start in daemon-mode
--user=<user> Run mysql-proxy as user
--basedir=<absolute path> Base directory to prepend to relative paths in the config
--pid-file=<file> PID file in case we are started as daemon
--plugin-dir=<path> path to the plugins
--plugins=<name> plugins to load
--log-level=(error|warning|info|message|debug) log all messages of level ... or higher
--log-file=<file> log all messages in a file
--log-use-syslog log all messages to syslog
--log-backtrace-on-crash try to invoke debugger on crash
--keepalive try to restart the proxy if it crashed
--max-open-files maximum number of open files (ulimit -n)
--event-threads number of event-handling threads (default: 1)
--lua-path=<...> set the LUA_PATH
--lua-cpath=<...> set the LUA_CPATH
#--proxy-read-only-backend-addresses定义只读服务器
#--proxy-backend-addresses定义主服务器
#lua脚本--proxy-lua-script
[root@proxy ~]# mysql-proxy --proxy-read-only-backend-addresses=192.168.220.129:3306 --proxy-backend-addresses=192.168.220.128:3306 --proxy-lua-script=/usr/local/mysql-proxy/share/doc/mysql-proxy/rw-splitting.lua &
[1] 10327
[root@proxy ~]# 2019-08-02 19:43:24: (critical) plugin proxy 0.8.5 started
[root@proxy ~]# netstat -antup | grep 4040
tcp 0 0 0.0.0.0:4040 0.0.0.0:* LISTEN 10327/mysql-proxy
mysql-proxy测试
[root@proxy ~]# mysql -uroot -p -P4040 -h 192.168.220.130
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.5.61-log MySQL Community Server (GPL)
Copyright (c) 2000, 2018, 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> show processlist
-> ;
+----+------+-----------------------+------+---------+------+-------+------------------+
| Id | User | Host | db | Command | Time | State | Info |
+----+------+-----------------------+------+---------+------+-------+------------------+
| 12 | root | 192.168.220.130:52136 | NULL | Query | 0 | NULL | show processlist |
+----+------+-----------------------+------+---------+------+-------+------------------+
1 row in set (0.00 sec)
[root@proxy ~]# lsof -i:3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 13301 mysql 10u IPv4 89254 0t0 TCP *:mysql (LISTEN)
mysql-pro 13332 root 11u IPv4 89312 0t0 TCP proxy:52136->master:mysql (ESTABLISHED)
mysql-pro 13332 root 12u IPv4 90289 0t0 TCP proxy:52138->master:mysql (ESTABLISHED)
mysql-pro 13332 root 13u IPv4 90926 0t0 TCP proxy:33581->slave:mysql (ESTABLISHED)