Add support for Redis Sentinel authentication

Bug Report

Current Behavior

I am trying to connect to the sentinel node of a Redis setup in AWS, and I am getting the message:

NOAUTH Authentication required.

Input Code

Just used a template for Spring Boot from start.spring.io with redis my properties are

spring:
  redis:
    password: ***********
    sentinel:
      master: redis-master
      nodes:
        - redis-sentinel.host

Expected behavior/code

It should connect without a problem.

Environment

• Lettuce version(s): 5.1.4.RELEASE, 5.1.5.RELEASE
• Redis version: 5.0.1

Possible Solution

I think the problem is that from 5.0.1 and on they added authentication on the Sentinel and that’s why it’s failing. For more info check Redis 5 Release Notes

[Pramit2512]

After some help i was able to connect to redis as :

    RedisClient redisClient = RedisClient.create();

        LOG.info("created the redis client");

        RedisURI source = RedisURI.Builder
                .sentinel(getSentinelHost_1(), getSentinelPort_1())
                .withSentinel(getSentinelHost_2(), getSentinelPort_2())
                .withSentinel(getSentinelHost_3(), getSentinelPort_3())
                .withSentinelMasterId(getMasterName()).withPassword(getMasterPassword())
                .build();

        for (RedisURI sentinel : source.getSentinels()) {
            sentinel.setPassword(getSentinelPassword());
        }

        StatefulRedisMasterReplicaConnection<String, String> connection = MasterReplica.connect(redisClient, StringCodec.UTF8,
                source);

        connection.setReadFrom(ReadFrom.REPLICA_PREFERRED);

        LOG.info("created the redis connection");

[cdekker]

@mp911de How is this to be used with Spring Boot? I am running into the same issue where I have a password on both my Sentinel and Redis node (same password), but upgrading to lettuce-core 5.2.0.RELEASE does not solve the issue.

I have this in my gradle file:

implementation 'org.springframework.boot:spring-boot-starter-data-redis'
compile 'org.springframework.session:spring-session-data-redis:2.1.8.RELEASE'
compile group: 'io.lettuce', name: 'lettuce-core', version: '5.2.0.RELEASE'

When running gradle dependencies, I see that lettuce-core version is successfully overridden from 5.1.8. to 5.2.0:

+--- org.springframework.boot:spring-boot-starter-data-redis -> 2.1.8.RELEASE
|    +--- org.springframework.boot:spring-boot-starter:2.1.8.RELEASE (*)
|    +--- org.springframework.data:spring-data-redis:2.1.10.RELEASE (*)
|    \--- io.lettuce:lettuce-core:5.1.8.RELEASE -> 5.2.0.RELEASE (*)

My application properties has this:

spring.session.store-type=redis

spring.redis.password=mypassword
spring.redis.sentinel.master=mymaster
spring.redis.sentinel.nodes=redis-sentinel-hostname:26379

Yet, when starting up, I still get the same exception: io.lettuce.core.RedisCommandExecutionException: NOAUTH Authentication required.