最近有段时间没有写博客了,今天抽出时间写写,之前开发的时候redis部署在Linux是其他人搞得,我没怎么参与,于是闲着无聊在本地的虚拟机上安装了个redis进行测试,没想到在进行连接时报了下面这么一个错,fuck,Linux上的redis还真是麻烦,哪像windows上的redis这么简单一解压完事 
  

Exception in thread "main" redis.clients.jedis.exceptions.JedisDataException: DENIED 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.
    at redis.clients.jedis.Protocol.processError(Protocol.java:127)
    at redis.clients.jedis.Protocol.process(Protocol.java:161)
    at redis.clients.jedis.Protocol.read(Protocol.java:215)
    at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340)
    at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239)
    at redis.clients.jedis.BinaryJedis.ping(BinaryJedis.java:196)
    at com.example.redis.JedisTest.main(JedisTest.java:24)

  经过我英语八级的翻译,上面一共提供了四种解决方案,但是综合考虑为了简单起见只需要执行以下几步即可: 

   

  1.修改redis.conf配置文件,将绑定的ip地址端口号给注释见下图 

  

平替Redis的产品 ping redis_平替Redis的产品

  2.由于Linux上的redis处于安全保护模式,这就让你无法从虚拟机外部去轻松建立连接,这里就有两种解决方法,一种是在redis.conf中设置保护模式为no,见下图 

  

平替Redis的产品 ping redis_Redis_02

  3.另外一种方式是加上安全认证,即redis默认是没有密码的可以直接登录,这里加上密码,配置见下图 

  

平替Redis的产品 ping redis_java_03

  4.好吧,此时你以为轻松解决问题了,于是再次在Linux启动redis服务器后,在外部连接还是报错,真是too young too native,起初我以为是配置没有生效,因为明明配置都写好了,于是杀掉redis的相关进程重启服务,结果发现还是没卵用。最后研究发现问题所在:之前启动redis-server并没有指定配置文件,而Linux上的redis比较操蛋的一点就是如果你不指定配置文件去启动,那么你做的修改就没有用,会读取默认配置(PS:至于这个默认配置在哪我也不清楚),于是用下面这种方式启动就可以使修改的配置文件生效,至于config rewrite命令我测试了并没有什么卵用。 

  

平替Redis的产品 ping redis_平替Redis的产品_04

  5.再次测试,在windows上进行jedis连接测试,出现下面pong(),恼人的错误终于消失了,比起windows版本的redis还真是让人龟毛啊,如果配置了密码认证,调用Jedis的auth方法输入密码即可