Redis create cluster issue

[ellik95]

Hello,
I have a Redis MemoryDB cluster with 2 nodes in AWS and I'm trying to connect to it through createCluster, but the connection isn't established.
Here is how I try to connect:

import { createCluster } from 'redis';
(async () => {
    const REDIS_USERNAME = 'test-username';
    const REDIS_PASSWORD = 'test-pass';
    const cluster = createCluster({
        rootNodes: [
            {
                url: `rediss://redis-region-0001-001.amazonaws.com:6379`,
                username: REDIS_USERNAME,
                password: REDIS_PASSWORD,
            },
            {
                url: `rediss://redis-region-0001-002.amazonaws.com:6379`,
                username: REDIS_USERNAME,
                password: REDIS_PASSWORD,
            },
        ]
    });
    cluster.on('error', (err) => console.log('Redis Cluster Error', err));
    console.log('before connection');
    await cluster.connect();
    console.log('connected to cluster...');
    await cluster.set('key', 'value');
    const value = await cluster.get('key');
    console.log(value);
    await cluster.disconnect();
})();

The log connected to cluster... is never showed up.
If I add in the configuration of createCluster to the defaults option the master node endpoint like this:

defaults: {
            url: `rediss://redis-region-0001-001.amazonaws.com:6379`,
            username: REDIS_USERNAME,
            password: REDIS_PASSWORD,
        }

The connection is established and everything works fine!
Why do I need the defaults option? Shouldn't it work only with rootNodes?
Thank you!

Environment:

• Node.js Version: 16-alpine3.12
• Redis Server Version: 6
• Node Redis Version: 4.0.0

[leibale]

As described in the clustering guide:

• rootNodes - "An array of root nodes that are part of the cluster, which will be used to get the cluster topology. Each element in the array is a client configuration object. There is no need to specify every node in the cluster, 3 should be enough to reliably connect and obtain the cluster configuration from the server"
• defaults - "The default configuration values for every client in the cluster. Use this for example when specifying an ACL user to connect with"

node-specific properties should be listed in rootNodes, the rest in defaults

createCluster({
 rootNodes: [{
   url: `rediss://redis-region-0001-001.amazonaws.com:6379`
 }, {
   url: `rediss://redis-region-0001-002.amazonaws.com:6379`
 }],
 defaults: {
   username: REDIS_USERNAME,
   password: REDIS_PASSWORD
 }
});

[ellik95]

I had tried this also and the same thing happened! Could you please reopen the issue?

[leibale]

@ellik95 It didn't work even when the username & password are in the defaults object? can you please share your code?

[ellik95]

Yes, with this code:

import { createCluster } from 'redis';
(async () => {
    const REDIS_USERNAME = 'test-username';
    const REDIS_PASSWORD = 'test-pass';
    const cluster = createCluster({
        rootNodes: [
            {
                url: `rediss://redis-region-0001-001.amazonaws.com:6379`
            },
            {
                url: `rediss://redis-region-0001-002.amazonaws.com:6379`
            },
        ],
       defaults: {
            username: REDIS_USERNAME,
            password: REDIS_PASSWORD,
        }
    });
    cluster.on('error', (err) => console.log('Redis Cluster Error', err));
    console.log('before connection');
    await cluster.connect();
    console.log('connected to cluster...');
    await cluster.set('key', 'value');
    const value = await cluster.get('key');
    console.log(value);
    await cluster.disconnect();
})();

it is not connected. Only if I add the url of the master node to the defaults options works. Like this:

defaults: {
            url: `rediss://redis-region-0001-001.amazonaws.com:6379`,
            username: REDIS_USERNAME,
            password: REDIS_PASSWORD,
        }

And I was wondering why is this needed.

[leibale]

createCluster({
  rootNodes: [{
    url: `rediss://redis-region-0001-001.amazonaws.com:6379`
  }, {
    url: `rediss://redis-region-0001-002.amazonaws.com:6379`
  }],
  defaults: {
    tls: true,
    username: REDIS_USERNAME,
    password: REDIS_PASSWORD
  }
});

[ellik95]

It's not working either and tls option does not exist in type Partial<RedisClusterClientOptions>.

[leibale]

@ellik95

createCluster({
  rootNodes: [{
    url: `rediss://redis-region-0001-001.amazonaws.com:6379`
  }, {
    url: `rediss://redis-region-0001-002.amazonaws.com:6379`
  }],
  defaults: {
    socket: {
      tls: true
    },
    username: REDIS_USERNAME,
    password: REDIS_PASSWORD
  }
});

[ellik95]

Unfortunately it is not working either. Only with the below code is:

createCluster({
  rootNodes: [{
    url: `rediss://redis-region-0001-001.amazonaws.com:6379`
  }, {
    url: `rediss://redis-region-0001-002.amazonaws.com:6379`
  }],
  defaults: {
    url: `rediss://redis-region-0001-001.amazonaws.com:6379`
    username: REDIS_USERNAME,
    password: REDIS_PASSWORD
  }
});

[ellik95]

Also when I connect I sometimes get the error ReplyError: MOVED 12539 rediss://redis-region-0001-002.amazonaws.com:6379 and I cannot get the value from the key.