[Bug]: Database API cannot connect to IPv6 only Redis cluster

[connorhsu-sn]

Preconditions (Any important steps we need to know)

We are running Redis Insight and Redis cluster in the same k8s cluster.
I tried ipv6 connection from Redis Insight container to our Redis cluster by

# nc -zv -6 xxxx:xxxx:xxxx:xxxx:xxxx::x:6379
Connection to xxxx:xxxx:xxxx:xxxx:xxxx::x 6379 port [tcp/redis] succeeded!

so it's not network issue.

Steps to reproduce (How to reproduce what you found step by step)

I use the swagger UI (i.e. https://myhost/api/docs#) on POST /api/databases to create a database in Redis Insight.
The payload is like this:

{
  "host": "xxxx:xxxx:xxxx:xxxx:xxxx::x",
  "port": 6379,
  "name": "my-redis-cluster",
  "db": 0,
  "username": "xxx",
  "password": "yyy"
}

Actual behavior (A short description of what you found)

I got error 404:

{
  "message": "The connection has timed out, please check the connection details.",
  "error": "Bad Request",
  "statusCode": 400
}

If I add "timeout": 1000000 to my payload, I got 503:

{
  "message": "Could not connect to xxxx:xxxx:xxxx:xxxx:xxxx::x:6379, please check the connection details.",
  "error": "Service Unavailable",
  "statusCode": 503
}

Note that doing the same POST from the container gives me the same result.

Expected behavior (A short description of what you expected to find)

The API creates a database in Redis Insight successfully.

Screenshots (Paste or drag-and-drop a screenshot or a link to a recording)

N/A

Additional context (Operating system, version of Redis Insight, Redis database version, Redis module version, database type, connection type, logs, or any other information)

• OS: Debian 11
• Redis Insight version: 2.58.0
• Redis database version: Redis server v=7.0.4
• connection type: cluster
• The error log we get from the underlying ioredis library

[NestWinston] Debug	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Creating ioredis standalone client - {"stack":"[]"}
[NestWinston] Info	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Successfully connected to the redis database - {"stack":"[]"}
[NestWinston] Debug	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Creating ioredis standalone client - {"stack":"[]"}
[NestWinston] Info	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Successfully connected to the redis database - {"stack":"[]"}
[NestWinston] Warn	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Server closed the connection. - {"stack":"[]"}
[NestWinston] Error	10/22/2024, 5:31:39 AM [IoredisRedisConnectionStrategy] Failed connection to the redis oss cluster - {"stack":"[ { message: 'Failed to refresh slots cache.' } ]"}
[NestWinston] Error	10/22/2024, 5:31:39 AM [DatabaseFactory] Failed to add oss cluster. - {"stack":"[ { message: 'Failed to refresh slots cache.' } ]"}
[NestWinston] Error	10/22/2024, 5:31:39 AM [DatabaseService] Connection test failed - {"stack":"[\n  {\n    message: 'Could not connect to xxxx:xxxx:xxxx:xxxx:xxxx::x:6379, please check the connection details.'\n  }\n]"}

So I am wondering if it's related to the Redis client setting.

• I found that redis insight didn't specify the IP family in the option: https://github.com/RedisInsight/RedisInsight/blob/main/redisinsight/api/src/modules/redis/connection/ioredis.redis.connection.strategy.ts#L50-L64, and the underlying library is ioredis, but ioredis actually has an option to specify the family, maybe adding family support if the payload specifies family: 6?

[ViktarStarastsenka]

here is a similar ticket - #1429

[connorhsu-sn]

here is a similar ticket - #1429

I think that's a different issue though, he can connect directly through IPv6 address while I cannot.

by "not planned" did you mean there is no plan to support IPv6 connection?

[ViktarStarastsenka]

@connorhsu-sn, I think they are very related, and the investigation will be done on both issues simultaneously (though I can't provide a timeline at the moment).
It was closed as a "duplicate." This resolution is visible when you hover over "not planned."

[connorhsu-sn]

@ViktarStarastsenka Got it, thank you :)