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HomeDatabaseMysql TutorialA new MySQL proxy written in Go — LegendBase Proxy

今天很高兴得知Go1 release, 其实我一只在等它正式发布,因为我用go语言自己实现了一个MySQL代理,命名为LegendBase Proxy for MySQL(LPM),等Go1 release之后,我也可以尽快release出来了. 代码摘录: case COM_STMT_EXECUTE, COM_QUERY: /* if we get a OK in t

今天很高兴得知Go1 release, 其实我一只在等它正式发布,因为我用go语言自己实现了一个MySQL代理,命名为LegendBase Proxy for MySQL(LPM),等Go1 release之后,我也可以尽快release出来了.

代码摘录:

        case COM_STMT_EXECUTE, COM_QUERY:
                /* if we get a OK in the first packet there will be no result-set */
                switch *qStage {
                case PARSE_COM_QUERY_INIT:
                        switch pkt[4] {
                        case 0xff, 0×00: // ERR, OK, NULL
                                /* ERR: e.g. SELECT * FROM dual -> ERROR 1096 (HY000): No tables used */
                                /* OK:  e.g. DELETE FROM tbl */
                                finished = true
                                break
                        case 0xfb: // NULL
                                *qStage = PARSE_COM_QUERY_LOAD_DATA
                                finished = true
                                break
                        case 0xfe: // EOF
                                err = errors.New(fmt.Sprintf("COM_(0x%02x), packet should not be (NULL|EOF), got %02x", cmd, pkt[4]))
                                break
                        default:
                                *qStage = PARSE_COM_QUERY_FIELD
                                break
                        }
                        break

                case PARSE_COM_QUERY_FIELD:
 

写这个的初衷是因为除了部分程序开发者自己实现了读写分离\或者采用sharding方式之外,还有大量的程序是针对单一的MySQL数据库接口. 然而随着业务量的增加,db压力增大,单台db没法承载,需要扩展MySQL数据库为主从架构,这时候需要代理层来分发读写,因为改造程序的代价往往太大.

新开发的MySQL proxy的配置如下:

[proxy]
port = 3307
sock = /tmp/proxy.sock
fetch_schemas_interval = 10  # seconds

# For management
admin_user      = admin
admin_password  = 100c4e57374fc998e57164d4c0453bd3a4876a58   # sha1
admin_port      = 8288

# For connecting to proxy
proxy_user      = ivan
proxy_password  = 100c4e57374fc998e57164d4c0453bd3a4876a58   # sha1

# For proxy to connect backend mysql server
mysql_user      = ivan
mysql_password  = 100c4e57374fc998e57164d4c0453bd3a4876a58    #sha1
mysql_dbname    = test # default db

# connections setting
connections_per_weight_max = 32

# master and slaves setting. ip:port:w  w: weight of load
master          = 127.0.0.1:3306
#slaves         = 127.0.0.1:3306:1|192.168.2.200:3306:2|192.168.2.203:3306:1
slaves          = 127.0.0.1:3306:1
 

其中配置的密码是明文密码的sha1, 防止非相关人员获取数据库的密码,安全性能得到一定的保障.
通过其他的配置也可以看出proxy实现的功能,即能够配置多个slave,并且能够指定它们的权重.

Related posts:

  1. Golang 实现的 mysql-proxy
  2. lbmysqlping (LegendBase MySQL Ping)
  3. MySQL vs NoSQL 效率与成本之争
  4. 6.0.11 will be the last release of MySQL 6.0
  5. 由CSDN泄密想到的:MySQL数据库验证过程的改进、密码存储及验证方法的总结

? 谭俊青 发布在 MySQL性能、MySQL Cluster集群、MySQL HA高可用等研究 - MySQL实验室, 2012.
可以任意转载, 但转载时务必以超链接形式标明文章原始出处 和 作者信息。
链接: http://www.mysqlab.net/blog/2012/03/a-new-mysql-proxy-written-in-go-language/

标签: MySQL Proxy

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