How to connect to aws elastic cache cluster ?

[SeyyedKhandon]

I wonder what is the equivalent of https://github.com/redis/ioredis?tab=readme-ov-file#special-note-aws-elasticache-clusters-with-tls in node-redis?

Currently in ioredis we just use and it works fine( the only issue is redis/ioredis#1454):

  const redisCluster = new Redis.Cluster([{ 
host:"clustercfg.redis-cluster-name.xiko.euw1.cache.amazonaws.com:6379",
 port:6379 
}], {
    scaleReads: 'all',
    dnsLookup: (address, callback) => callback(null, address),
    redisOptions: {
      password:"token",
      tls: {},
    },
  })

[leibale]

I'm not too sure why the dnsLookup function is needed, but using RedisClient, anything that is under the socket option is passed directly to net.connect or tls.connect (see https://github.com/redis/node-redis/blob/master/docs/client-configuration.md), so you can do:

createClient({
  socket: {
    host: 'redis.server',
    port: 6379
    tls: true
  },
  password: 'token'
});

and using RedisCluster, anything under defaults will be passed to all clients created by the cluster (see https://github.com/redis/node-redis/blob/master/docs/clustering.md#createcluster-configuration), so you can do:

createCluster({
  rootNodes: [{
    socket: {
      host: 'redis.server',
      port: 6379
    }
  }],
  defaults: {
    socket: {
      tls: true
    },
    password: 'token'
  }
});

please let me know if it works for you, and if and what you think we should update in the documentation

edit:
I thought dnsLookup is an option ioredis passes to net.connect/tls.connect but that's not true.. As I've said, I'm not too sure if its needed, I suggest you try it without it.

[SeyyedKhandon]

Well using dns is based on the ioredis doc and it is necessary for aws elastic cache.

And for createCluster from node-redis, actually there is no host, port options available on node-redis, and it is only url or either socket

[leibale]

I've edited my answer to show how to do host and port

[SeyyedKhandon]

Thanks, it worked.

[SeyyedKhandon]

@leibale Could you please have a look into this pr #2771 which is about adding this example of yours into the doc.