version: "3"
services:
  master:
    image: redis:latest
    container_name: my_redis_master
    command: redis-server --requirepass root  # 在连接容器时需要密码
    ports:
      - 6379:6379
  slave1:
    image: redis:latest
    depends_on:  # 这里目的是需要先启动master，随后再启动slave节点
      - master
    container_name: my_redis_slave1
    command: redis-server --slaveof my_redis_master 6379 --requirepass root --masterauth root # 再容器启动后，通过这里命令来指定主节点ip地址
    ports:
      - 6380:6379
  slave2:
    image: redis:latest
    depends_on:
      - master
    container_name: my_redis_slave2
    ports:
     - 6381:6379
    command: redis-server --slaveof my_redis_master 6379 --requirepass root --masterauth root
networks:   # 这里是配置网络环境，目的是让容器之间能够相互连接，如果不配置，哨兵将获取不到从节点的信息，并且无法转换master节点
  default:
    external:
      name: redis_net

version: '3'
services:
  sentinel1:
    image: redis
    container_name: redis-sentinel-1
    networks:
      - redis_net
    ports:
      - 26379:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf  # 启动哨兵，并且指定配置文件
    volumes:
      - ./sentinel1.conf:/usr/local/etc/redis/sentinel.conf

  sentinel2:
    image: redis
    container_name: redis-sentinel-2
    networks:
      - redis_net
    ports:
      - 26380:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel2.conf:/usr/local/etc/redis/sentinel.conf

  sentinel3:
    image: redis
    container_name: redis-sentinel-3
    networks:
      - redis_net
    ports:
      - 26381:26379
    command: redis-sentinel /usr/local/etc/redis/sentinel.conf
    volumes:
      - ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf
networks:  # 这里指定网络跟redis在同一个网络环境下
  redis_net:
    external:
      name: redis_net

sentinel配置文件，将下面的配置文件 cp成三分就行
port 26379
dir /tmp
sentinel monitor mymaster 192.168.16.2 6379 2  #指定集群的名字以及集群中master的ip地址，这里是容器地址，如果是用的虚拟机地址我这边会导致master转换不了。2就是指哨兵有多少个哨兵认为失效master就失效，保证超过50%就行
sentinel auth-pass mymaster root # 重点：我就是在这里忘了配置master需要密码登陆 导致一直获取不到master节点下的从信息
sentinel down-after-milliseconds mymaster 30000 #这里是指定master在失效之后多久就认为失效
sentinel parallel-syncs mymaster 1 # failover进行主备切换时最多可以有多少个slave对新的master进行同步，值越小完成failover的时间就越长，设置为1就是每次只有一个slave处于不能处理命令的状态
sentinel failover-timeout mymaster 180000 

sentinel deny-scripts-reconfig yes

<dependency>

      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-redis</artifactId>
      <!-- 排除lettuce包，使用jedis代替-->
      <exclusions>
        <exclusion>
          <groupId>io.lettuce</groupId>
          <artifactId>lettuce-core</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    <dependency>
      <groupId>redis.clients</groupId>
      <artifactId>jedis</artifactId>
      <version>3.0.1</version>
    </dependency>

spring:
  redis:
    sentinel:
      master: mymaster
      nodes: 192.168.16.5:26379,192.168.16.6:26380,192.168.16.7:26381  # 这里是连接的docker容器中哨兵的ip
    jedis:
      pool:
        max-idle: 8
        min-idle: 0
        max-wait: -1
        max-active: 8
    password: root

@Bean
    public RedisTemplate<String,Object> redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);

        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();

        // key采用String的序列化方式
        redisTemplate.setKeySerializer(stringRedisSerializer);
        // hash的key也采用String的序列化方式
        redisTemplate.setHashKeySerializer(stringRedisSerializer);
        // value序列化方式采用jackson
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // hash的value序列化方式采用jackson
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }