How Do I Connect to a Redis Sentinel that requirespass with ServiceStack.Redis? - redis

Question

I have a simple redis cluster on my local machine that consists of:
master on port 3679
slave on port 6380
sentinel on port 26379
I am using ServiceStack.Redis to connect with no problems so far. Today I added a password to each of them using the requirepass 42 setting. I can connect to all of them using Redis Desktop Manager fine and everything works as expected.
Using the following code, I get an error when I attempt to connect. Removing the password works as expected.
var config = RedisConfiguration.Instance;
Func<string, string> hostFilter = host => string.IsNullOrEmpty(config.SecurityKey)
? $"{host}?db={config.Database}"
: $"{config.SecurityKey}#{host}?db={config.Database}";
var sentinelHosts = config.SentinelHosts.Select(hostFilter);
var sentinel = new RedisSentinel(sentinelHosts, config.ServiceName)
{
HostFilter = hostFilter,
RedisManagerFactory = (master, slaves) => new RedisManagerPool(master)
};
sentinel.OnFailover += manager => Logger?.Warn($"Redis fail over to {sentinel.GetMaster()}");
sentinel.Start()
This code throw a RedisException "No Redis Sentinels were available" with an inner exception of "unknown command 'AUTH'".
I am not clear if I am using the ServiceStack.Redis library improperly or my Redis cluster configuration is incorrect.
Can some one point me in the right direction?

Answer 1

You can use HostFilter to specify the password:
sentinel.HostFilter = host => $"{config.SecurityKey}#{host}?db={config.Database}";
But when using a password, it needs to be configured everywhere, i.e. in both Master and Slave configurations using:
requirepass password
masterauth password
The Redis Sentinels also need to be configured to use the same password so it can control the redis instances it's monitoring, which can be configured in your sentinel.conf with:
sentinel auth-pass mymaster pasword
The windows-password folder in the redis-config project shows an example of a password-protected Redis Sentinel configuration.