使用springboot连接拒绝Redis主从

Question

I have a master slave set up on ports 3824(master) and 3825(slave). However, when I shutdown master, the read operation gives a connection refused exception. Below is my configuration. How can I ensure that even if I kill master, I'm still reading from slave. Where did i go wrong.

@Bean
public RedisConnectionFactory redisFactory() {

LettuceClientConfiguration config = LettuceClientConfiguration.builder().readFrom(ReadFrom.SLAVE_PREFERRED).buld();
RedisStandaloneConfiguration serverConfig = new RedisStandaloneConfiguration("localhost",3825);
    LettuceConnectionFactory fact = new LettuceConnectionFactory(serverConfig, config);
    return fact;
}

Answer 1

To support high-availability within your application, you might need to implement the redis-sentinel .

Redis Sentinel when passed to RedisSentinelConfiguration act as a bridge b/w your application and the redis master-slave nodes running as in a group of servers.

It will mainly act as a configuration provider. If a failover occurs, Sentinels will report the new address

Spring Data Redis Sentinel Support :

/**
 * Lettuce
 */
@Bean
public RedisConnectionFactory lettuceConnectionFactory() {
  RedisSentinelConfiguration sentinelConfig = new RedisSentinelConfiguration()
  .master("mymaster")
  .sentinel("127.0.0.1", 26379)
  .sentinel("127.0.0.1", 26380);
  return new LettuceConnectionFactory(sentinelConfig);
}

Upon master failure event, when the slave is promoted as master, all write requests will be routed to the newly elected master.