今天在测试MySQL的连接时候,发现连接不通过,并报错 ERROR 2003 (HY000): Can't connect to mysql server on '192.168.10.210' (111)
测试代码:
require 'mysql2'
client = Mysql2::Client.new(:host=>"192.168.10.210",:username=>'root',:password=>"root")
puts results = client.query("show databases;")
谷歌了一下之后,原来是在mysql的my.cnf中有下面一段代码:
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1 #这里默认监听本地localhost
如果要让mysql监听到其他的地址,可以将
bind-address = 127.0.0.1
注释掉。
或者将
bind-address = 0.0.0.0
监听所有的地址
屏蔽掉之后再次运行代码又出现:
Host '192.168.10.83' is not allowed to connect to this MySQL server
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsISPrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdsATOfd3bkFGazxCMx8VesATMfhHLlN3XnxCMwEzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-cmbw5yMmRTZ3UjNwMWZkFGO4YGZyYzY1kjM4MTYhZGZyIDN58CXxEzLchDMxIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjLzM3Lc9CX6MHc0RHaiojIsJye.png)
解决方法:
如果想让
192.168.10.83
能够连接到本地的这个数据库,要让数据库给其分配权限,登录mysql,执行:(username 和 password是登录mysql的用户名和密码)
GRANT ALL PRIVILEGES ON *.* TO 'username'@'192.168.10.83' IDENTIFIED BY 'password' WITH GRANT OPTION;
如果要想所有的外部ip地址都能够访问使用mysql,可以执行下面:
GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
之后执行刷新数据库:
flush privileges;
如果要查看用户的权限,可以执行:
> show grants for 'root'@192.168.10.83