SpringBoot连接redis哨兵模式

	redis-master	redis-slave1	redis-slave2	redis-sentinel1	redis-sentinel2	redis-sentinel3
配置文件	redis-9090.conf	redis-9091.conf	redis-9092.conf	sentinel-26377.conf	sentinel-26378.conf	sentinel-26379.conf
ip
port	9090	9091	9092	26377	26378	26379
role	master	slave	slave	sentinel	sentinel	sentinel

一、设置sentinel远程访问

【问题】由于是自己搭建的redis的哨兵模式，所以在连接前需要看下远程访问redis的哨兵是否成功

image.png

解决方法

设置sentinel-26377.conf的protected-mode no；默认是该字段值是yes

image.png

二、SpringBoot连接redis哨兵模式

启动springboot项目提示：Unable to connect to 127.0.0.1:9092

问题[1]：sentinel-XXX.conf的配置为sentinel monitor mymaster 127.0.0.1 16379 2
问题[2]：redis-XXX.conf的配置为bind 127.0.0.1

修改问题[1]中为redis集群master节点的真实地址；
修改问题[2]中为bind 0.0.0.0

image.png

三、redis-template代码

• application.properties

# redis-single
# spring.redis.host=110.24.71.71
# spring.redis.port=9090
# spring.redis.password=123456

## redis-sentinel
spring.redis.password=123456
spring.redis.sentinel.master=mymaster
spring.redis.sentinel.nodes=110.24.71.71:26377,110.24.71.71:26378,110.24.71.71:26379

• pom.xml

<!--  加载 spring  boot  redis 包  -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

• 序列化

@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {

    @Bean
    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(stringRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
}

【注】redisTemplate实际上是对其他框架的的封装，springboot2.x以上底层实现由jedis变为了lettuce。而且lettuce会根据配置自动选择是否用单机或者哨兵模式。

image.png image.png

四、参考

【1】Redis 哨兵模式 设置密码
【2】sentinel搭建redis集群经验总结
【3】SpringBoot2.x使用Lettuce连接redis哨兵报错：RedisConnectionException: Unable to connect to 127.0.0.1:16379]：https://blog.csdn.net/repAgell/article/details/106600960
【4】解决使用jedis连接是报DENIED Redis is running in protected mode错误：https://www.cnblogs.com/lonecloud/p/9084761.html