redis.sentinel.SlaveNotFoundError: No slave found for 'mymaster'

[alelomonaco]

Name and Version
redis: 7.2.3
dogpile.cache: 1.2.2
redis-py: 5.0.1

What steps will reproduce the bug?

Deploy a Redis cluster with sentinel and auth enabled, create a script to call sentinel host and retrieve data from cache:

import dogpile.cache
import time
import logging
import redis

# Set the log level to DEBUG for Dogpilecache
logging.basicConfig(level=logging.DEBUG)

# Create a Dogpilecache region
cache_region = dogpile.cache.make_region().configure(
    'dogpile.cache.redis_sentinel',
    arguments={
        'sentinels': [
            ['redis-cluster', 26379],
        ],
        'sentinel_kwargs': {
            'password': 'mypassword',
        }
    }
)


def get_data_from_cache(key):
    # Try retrieving data from cache
    data = cache_region.get(key)

    if data is not None:
        print(f"Data found in cache: {data}")
    else:
        print("Data not found in cache")
        # Simulating a time-consuming operation to fetch the data
        time.sleep(2)
        data = f"Sample data for {key}"
        # Store the data in cache for future use
        cache_region.set(key, data)
        print(f"Data stored in cache: {data}")

    return data


# Perform data retrieval using Dogpilecache
print(redis.__version__)
result = get_data_from_cache("example_key")
print(f"Final result: {result}")

Are you using any custom parameters or values?
I'm sure about every parameter because without auth, script works as expected, the only parameter I cannot trust is password in sentinel_kwargs. I'm also sure that problem is on dogpile.cache because from the same client it works with redis-cli or with a python script like this:

import redis

# Create a Redis Sentinel connection
sentinel = redis.Redis(
    host='redis-cluster',
    port=26379,
    password='mypassword',
    decode_responses=True
)

# Get the replicas (slaves) of the master
replicas = sentinel.sentinel_slaves('mymaster')

# Iterate through replicas and print their IP and port
for replica in replicas:
    replica_host = replica['ip']
    replica_port = replica['port']
    print(f"Replica: {replica_host}:{replica_port}")

What is the expected behavior?
same output obtained when auth is disabled:
5.0.1
Data found in cache: <dogpile.cache.api.NoValue object>
Final result: <dogpile.cache.api.NoValue object>

What do you see instead?
redis.sentinel.SlaveNotFoundError: No slave found for 'mymaster

Additional information
Redis cluster is deployed through bitnami helm chart.
I've tried different version of dogpile.cache (1.1.8 and 1.1.0), same result.

I've tried to add decode_responses parameter, same result.
Network and name resolution are ok. It works without auth and with auth enable but without dogpile.cache (like redis-cli and redis-py).