nginx配置四层端口转发mysql登录

1、安装nginx，安装过程中注意添加--with-stream模块

2、修改nginx配置文件（编辑配置文件时注意所有的空格避免tab键出现）

stream {  #类似于7层的http段
	upstream mysql {
	    #hash $remote_addr consistent;
		server 172.16.1.202:3306 weight=1 max_fails=3 fail_timeout=10s;
	}

	server {
		listen  新端口；
		proxy_pass mysql;
		proxy_timeout 600s;
		proxy_connect_timeout 30s;  
	} 
}

3、重启nginx，在客户端登录数据库

出现如下报错

[root@ip-10-0-1-85 ~]# mysql -uuser -hIP地址 -P 新端口 -p
Enter password: 
ERROR 1129 (HY000): Host 'IP地址' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'

解决办法

mysql> show variables like 'max_connect_errors';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| max_connect_errors | 100   |
+--------------------+-------+
1 row in set

mysql> set global max_connect_errors=1000
    -> ;

mysql> show variables like 'max_connect_errors';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| max_connect_errors | 1000  |
+--------------------+-------+
1 row in set

4、重新登录

[root@ip-10-0-1-85 ~]# mysql -ucpct_db_test -hIP地址 -P 新端口 -p
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection id is 108554
Server version: 5.6.41-log Source distribution

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MySQL [(none)]> Ctrl-C -- exit!
Aborted

当我们后期还出现上一步的问题是我们可以通过flush hosts;命令来解决问题

至此通过nginx实现四层端口转发已部署完毕