https://blog.csdn.net/leonpenn/article/details/77278360
https://www.baidu.com/s?ie=utf8&wd=mycat+读写分离&tn=87048150_dg
https://www.cnblogs.com/biglittleant/p/7059569.html
https://blog.csdn.net/yougoule/article/details/56680952
http://www.cnblogs.com/fyy-hhzzj/p/9041919.html
https://www.cnblogs.com/joylee/p/7513038.html
https://www.cnblogs.com/fxwl/p/7990906.html mycat 配置文件详解