怎么解决数据库ERROR 2003问题

这篇文章主要介绍“怎么解决数据库ERROR 2003问题”，在日常操作中，相信很多人在怎么解决数据库ERROR 2003问题问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么解决数据库ERROR 2003问题”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

[root@ora102 ~]# mysql -uroot -pchinabidding -h292.168.8.247

Warning: Using a password on the command line interface can be insecure.

排查问题：

1）网络是通的

ERROR 2003 (HY000): Cant connect to MySQL server on 192.168.8.247 (113)

[root@ora102 ~]# ping  192.168.8.247

PING 192.168.8.247 (192.168.8.247) 56(84) bytes of data.

64 bytes from 192.168.8.247: icmp_seq=1 ttl=64 time=0.510 ms

64 bytes from 192.168.8.247: icmp_seq=2 ttl=64 time=0.446 ms

64 bytes from 192.168.8.247: icmp_seq=3 ttl=64 time=0.475 ms

2）权限是没问题的

MySQL [(none)]> select host,user,password from mysql.user;

+-----------+------+-------------------------------------------+

| host      | user | password                                  |

+-----------+------+-------------------------------------------+

| localhost | root | *2548EFB13B516547C44482A519B886726A3B8E42 |

|%| root | *2548EFB13B516547C44482A519B886726A3B8E42 |

| 127.0.0.1 | root | *2548EFB13B516547C44482A519B886726A3B8E42 |

| ::1       | root | *2548EFB13B516547C44482A519B886726A3B8E42 |

3）vi /etc/my-fi 查看参数bind-address  是否设置成了  = 127.0.0.1

我压根没有设置这个参数，这个参数是默认是127.0.0.1，限制只能本地登录。

4）查看防火墙状态，如下，active的，防火墙的是开的。

bogon:root@~>service  iptables status

Redirecting to /bin/systemctl status  iptables.service

● iptables.service - IPv4 firewall with iptables

Loaded: loaded (/usr/lib/systemd/system/iptables.service; disabled; vendor preset: disabled)

Active: active (exited)since Wed 2017-12-06 15:01:37 CST; 2s ago

Process: 21617 ExecStop=/usr/libexec/iptables/iptables.init stop (code=exited, status=0/SUCCESS)

Process: 22369 ExecStart=/usr/libexec/iptables/iptables.init start (code=exited, status=0/SUCCESS)

Main PID: 22369 (code=exited, status=0/SUCCESS)

Dec 06 15:01:37 bogon systemd[1]: Starting IPv4 firewall with iptables...

Dec 06 15:01:37 bogon iptables.init[22369]: iptables: Applying firewall rules: [  OK  ]

Dec 06 15:01:37 bogon systemd[1]: Started IPv4 firewall with iptables.

查看端口，然后尝试去远端telnet 这个端口是否是同的。

MySQL [(none)]> show global variables like port;

+---------------+-------+

| Variable_name | Value |

+---------------+-------+

| port          | 3306  |

+---------------+-------+

1 row in set (0.00 sec)

telne果然是不通的

[root@ora102 ~]# telnet 192.168.8.247 3306

Trying 192.168.8.247...

telnet: connect to address 192.168.8.247: No route to host

在源段关闭防火墙：

bogon:root@~>service  iptables stop

Redirecting to /bin/systemctl stop  iptables.service

永久关闭：

bogon:root@~>chkconfig iptables on

再次在远程登陆，正常了。。。。

[root@ora102 ~]# mysql -uroot -pchinabidding -h292.168.8.247

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 21

Server version: 5.5.29-log Source distribution

Copyright (c) 2000, 2017, 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>

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