学习随笔——虚拟机安装redis出现的小问题解决

一、前言

之前使用redis都是在本机安装，本机使用。这次在虚拟机安装redis并连接成功，踩了一些之前没踩过的坑，特此记录一下。

二、redis的保护模式

报错信息
Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command ‘CONFIG SET protected-mode no’ from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to ‘no’, and then restarting the server. 3) If you started the server manually just for testing, restart it with the ‘–protected-mode no’ option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

大概意思就是redis在保护模式下运行，无法连接。并给出了四个解决方案。
这四个解决方案其实是用不同的方式把保护模式关闭。
这里我直接修改redis的配置文件，将如下字段的值修改为no

protected-mode no

三、运行主机

在修改为非保护模式运行后，再次测试依然无法连接。
Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to 192.168.74.128:6379
这次直接是无法连接主机端口，使telnet测试跳转端口，也是无法连接。
首先确认防火墙关闭后启动redis。
其次查看配置文件，将如下字段修改为（默认值为127.0.0.1）

bind 0.0.0.0