Redis学习日记-02
服务器：阿里云入门版ECS（操作系统：CentOS）
安装redis
1：下载gcc编译程序
yum -y install gcc-c++
2：下载redis安装包
wget http://download.redis.io/releases/redis-3.2.11.tar.gz，默认下载到root目录下
解压：tar -zxvf redis-3.2.11.tar.gz
3:编译
cd redis-3.2.11.tar.gz
make
4：安装redis
make PREFIX=/usr/local/redis install 安装到/usr/local/redis目录下
拷贝配置文件 cp redis-3.2.11/redis.conf /usr/local/redis/ 把解压缩包里的配置文件拷贝到安装目录下
5：启动redis
进入redis目录 cd /usr/local/redis
启动 bin/redis-server
6:修改配置文件使redis后台运行
vi redis.conf
修改daemon=no 为yes
修改后再启动bin/redis-server redis.conf，注意这里需要加上配置文件为参数
7：关闭redis
bin/redis-cli shutdown
8：链接客户端
bin/redis-cli
设置数据（key-value）set name xujian
获取数据 get name
9：java链接redis
运行会报错
如果防火墙开启（systemctl stop firewalld-关闭防火墙，systemctl start firewalld-打开防火墙），则执行如下步骤，否则不用管
此时应该关闭服务器防火墙，或者配置下防火墙 开一个6379端口权限
firewall-cmd --zone=public --add-port=6379/tcp --permanent
firewall-cmd --reload
如果运行还报错
我们配置下 redis配置文件
[root@localhost redis]# vi /usr/local/redis/redis.conf
这里绑定了本机，我们把这个备注掉；
# bind 127.0.0.1
配置完后
[root@localhost redis]# ./bin/redis-cli shutdown
[root@localhost redis]# ./bin/redis-server ./redis.conf
要重启下redis服务；
继续运行 又报错了
如果还是报错连接超时，如果是阿里云ECS服务器，则需要添加对6379端口的安全组规则
继续运行 又报错了
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.Jedis.set(Jedis.java:121)
at com.java1234.redis.JedisTest.main(JedisTest.java:14)
这个是因为远程连接redis redis自我保护 拒绝访问；
有两种方法 解决
第一种 直接去掉自我保护功能（不推荐）
[root@localhost redis]# vi /usr/local/redis/redis.conf
进入配置
找到 protected-mode yes
改成 no即可
编辑后 重启redis服务，然后运行 ，结果出来了
第二种 设置redis连接密码
进入客户端
[root@localhost redis]# ./bin/redis-cli
127.0.0.1:6379> config set requirepass 123456
设置密码 123456
127.0.0.1:6379> quit
[root@localhost redis]# ./bin/redis-cli
127.0.0.1:6379> auth 123456
OK
说明设置成功
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package com.java1234.redis;
import redis.clients.jedis.Jedis;
/**
* 测试类
* @author user
*
*/
public class JedisTest {
public static void main(String[] args) {
Jedis jedis=new Jedis("192.168.1.107",6379); // 创建客户端 设置IP和端口
jedis.auth("123456"); // 设置密码
jedis.set("name", "java知识分享网"); // 设置值
String value=jedis.get("name"); // 获取值
System.out.println(value);
jedis.close(); // 释放连接资源
}
}
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这样就OK了
