今天在測試MySQL的連接配接時候,發現連接配接不通過,并報錯 ERROR 2003 (HY000): Can't connect to mysql server on '192.168.10.210' (111)
測試代碼:
require 'mysql2'
client = Mysql2::Client.new(:host=>"192.168.10.210",:username=>'root',:password=>"root")
puts results = client.query("show databases;")
谷歌了一下之後,原來是在mysql的my.cnf中有下面一段代碼:
# 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 #這裡預設監聽本地localhost
如果要讓mysql監聽到其他的位址,可以将
bind-address = 127.0.0.1
注釋掉。
或者将
bind-address = 0.0.0.0
監聽所有的位址
屏蔽掉之後再次運作代碼又出現:
Host '192.168.10.83' is not allowed to connect to this MySQL server
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsISPrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdsATOfd3bkFGazxCMx8VesATMfhHLlN3XnxCMwEzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-cmbw5yMmRTZ3UjNwMWZkFGO4YGZyYzY1kjM4MTYhZGZyIDN58CXxEzLchDMxIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjLzM3Lc9CX6MHc0RHaiojIsJye.png)
解決方法:
如果想讓
192.168.10.83
能夠連接配接到本地的這個資料庫,要讓資料庫給其配置設定權限,登入mysql,執行:(username 和 password是登入mysql的使用者名和密碼)
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位址都能夠通路使用mysql,可以執行下面:
GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
之後執行重新整理資料庫:
flush privileges;
如果要檢視使用者的權限,可以執行:
> show grants for 'root'@192.168.10.83