redis bind 设置

Dear 丶 2022-05-23 12:18 188阅读 0赞

在 **[Linux][]** 中安装了redis 服务

在 **Windows** 中安装了xampp环境。以供[PHP][]运行

PHP代码如下：

[?][Link 1]

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</table>

`执行以上代码时，报错如下：`

> `Fatal error: Uncaught exception ‘RedisException’ with message ‘Redis server went away’ in xxxx`
> 
> `RedisException: Redis server went away in xxxxxx`

# `解错误分析及解决办法` #

--------------------

`错误的原因很简单，就是没有连接上redis服务，由于redis采用的安全策略，默认会只准许本地访问。需要通过简单配置，完成允许外网访问。`

`修改redis的配置文件，将所有bind信息全部屏蔽。`

> `# bind 192.168.1.100 10.0.0.1 # bind 192.168.1.8 # bind 127.0.0.1`

`修改完成后，需要重新启动redis服务。`

`修改 Linux 的防火墙(iptables)，开启你的redis服务端口，默认是6379`

> `-A INPUT -m state –state NEW -m tcp -p tcp –dport 6379 -j ACCEPT …… -A INPUT -j REJECT –reject-with icmp-host-prohibited`

`请注意，一定要将redis的防火墙配置放在 REJECT 的前面。然后执行 service iptables restart`

`至此，访问刚刚上面的代码，就能够链接到redis服务，并且能够正确显示了。`

# `关于bind` #

--------------------

`翻看网上的文章，此处多翻译为“指定redis只接收来自于该IP地址的请求，如果不进行设置，那么将处理所有请求，在生产环境中最好设置该项”。这种解释会totally搞糊涂初学者，甚至是错误的。该处的英文原文为`

> `# If you want you can bind a single interface, if the bind option is not # specified all the interfaces will listen for incoming connections. # bind 127.0.0.1`

`该处说明bind的是interface，也就是说是网络接口。服务器可以有一个网络接口(通俗的说网卡)，或者多个。打个比方说机器上有两个网卡，分别为192.168.205.5 和192.168.205.6，如果bind 192.168.205.5，那么只有该网卡地址接受外部请求，如果不绑定，则两个网卡口都接受请求。`

`OK，不知道讲清楚没有，在举一个例子。在我上面的实验过程中，我是将bind项注释掉了，实际上我还有一种解决方案。由于我redis服务器的地址是 192.168.1.4 。如果我不注释bind项，还有什么办法呢？我可以做如下配置:`

> `# bind 192.168.1.4`

`这里很多人会误以为绑定的ip应该是请求来源的ip。其实不然，这里应该绑定的是你redis服务器本身接受请求的ip。``转自：https://www.2cto.com/database/201507/419799.html`

[Linux]: https://www.2cto.com/os/linux/
[PHP]: https://www.2cto.com/kf/web/php/
[Link 1]: https://www.2cto.com/database/201507/419799.html#