ClusterAllFailedError: Failed to refresh slots cache. with Cluster mode and TLS enabled

[jungRoit]

I'm trying to configure an ElastiCache cluster with TLS and Auth configured. I'm getting the following error with trying to connect:

ClusterAllFailedError: Failed to refresh slots cache

Here's my configurations detatils:
ioredis: 4.27.8
ElastiCache: 6.x

Code snippet:
client = new Redis.Cluster([{host: HOST,port:PORT}],{ redisOptions: { password: PASSWORD, tls: {} } });

[anax015obs]

I have a same problem.. tls: {} or dnsLookup does not work.

[juanviamonte]

This is an extremely annoying issue tbh, is you search under Issues tab for this repo there is at least 15 issues related to the same ClusterAllFailedError: Failed to refresh slots cache.

I had the same problem i was able to work around but not 100% because from time to time it disconnects and timeout.

1. If you are using cluster then make sure your ElastiCache Redis Instance Cluster mode is on (you have to make sure this is selected at the moment of creation)

2. Make sure there is AUTH enabled, and TLS, (Encryption at Rest ON, Encryption in Transit ON)
3. Make sure you can reach the primary endpoint of the Redis Cluster

redis-cli -u redis://PUT_YOUR_AUTH_PASSWORD_HERE@master.your_endpoint.use1.cache.amazonaws.com:6379/0 --tls ping
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
PONG

^ if you see PONG means your computer or EC2 can reach that Redis endpoint. If you're running from your actual computer (LInux, Mac, Windows, etc) you need to be inside the AWS VPN if you are not inside an AWS VPN from your organization you will not reach the Redis Cluster.
4. Make sure you can connect from an EC2 host in same VPC, or make sure you can connect from a lambda test function before going crazy and putting the code in your project.
5. I had to do this before actually connecting via Node/ioRedis code:

redis-cli -u redis://PUT_YOUR_AUTH_PASSWORD_HERE@master.your_endpoint.use1.cache.amazonaws.com:6379/0 --tls 

^ after connected to redis i did this:
> cluster slots
^ that should print your shard/cluster replicas/endpoints something similar to this:

1) 1) (integer) 0
   2) (integer) 16383
   3) 1) "YOUR_ENDPOINT_1-001.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "5d15665843ae2f5528fe01ae9e...."
   4) 1) "YOUR_ENDPOINT33.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "3c33fafba73a4270a5387809c861......"
   5) 1) "YOUR_ENDPOINT_2.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "daa36bd8b76d8464344...."

6. This is the code I used: file: redis_test.js

const connectCluster = () => {
  const cluster = new Redis.Cluster(
    [
      {
        host: "clustercfg.your_cluster_address.xyz.use1.cache.amazonaws.com",
        port: 6379,
      },
    ],
    {
      dnsLookup: (address, callback) => callback(null, address),
      redisOptions: {
        tls: true,
        password:
          "YOUR_AUTH_PASSWORD",
      },
    }
  );

  return cluster;
};

const cluster = connectCluster();
cluster.set("name", "test");
cluster.get("name").then(r => {
  console.log(r); // <- you should see "test"
});

Hopefully this help you both @anax015obs and @jungRoit

Also like others mentioned in different Issues use: DEBUG=ioredis:* node redis_test.js in order to see more information about your specific error message.

[jasonmorita]

This is an extremely annoying issue tbh, is you search under Issues tab for this repo there is at least 15 issues related to the same ClusterAllFailedError: Failed to refresh slots cache.

@juanviamonte THIS WORKED! Thank you for documenting those steps

[SeyyedKhandon]

This is an extremely annoying issue tbh, is you search under Issues tab for this repo there is at least 15 issues related to the same ClusterAllFailedError: Failed to refresh slots cache.

I had the same problem i was able to work around but not 100% because from time to time it disconnects and timeout.

1. If you are using cluster then make sure your ElastiCache Redis Instance Cluster mode is on (you have to make sure this is selected at the moment of creation)

2. Make sure there is AUTH enabled, and TLS, (Encryption at Rest ON, Encryption in Transit ON)
3. Make sure you can reach the primary endpoint of the Redis Cluster

redis-cli -u redis://PUT_YOUR_AUTH_PASSWORD_HERE@master.your_endpoint.use1.cache.amazonaws.com:6379/0 --tls ping
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
PONG

^ if you see PONG means your computer or EC2 can reach that Redis endpoint. If you're running from your actual computer (LInux, Mac, Windows, etc) you need to be inside the AWS VPN if you are not inside an AWS VPN from your organization you will not reach the Redis Cluster. 4. Make sure you can connect from an EC2 host in same VPC, or make sure you can connect from a lambda test function before going crazy and putting the code in your project. 5. I had to do this before actually connecting via Node/ioRedis code:

redis-cli -u redis://PUT_YOUR_AUTH_PASSWORD_HERE@master.your_endpoint.use1.cache.amazonaws.com:6379/0 --tls 

^ after connected to redis i did this: > cluster slots ^ that should print your shard/cluster replicas/endpoints something similar to this:

1) 1) (integer) 0
   2) (integer) 16383
   3) 1) "YOUR_ENDPOINT_1-001.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "5d15665843ae2f5528fe01ae9e...."
   4) 1) "YOUR_ENDPOINT33.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "3c33fafba73a4270a5387809c861......"
   5) 1) "YOUR_ENDPOINT_2.xyz.use1.cache.amazonaws.com"
      2) (integer) 6379
      3) "daa36bd8b76d8464344...."

6. This is the code I used: file: redis_test.js

const connectCluster = () => {
  const cluster = new Redis.Cluster(
    [
      {
        host: "clustercfg.your_cluster_address.xyz.use1.cache.amazonaws.com",
        port: 6379,
      },
    ],
    {
      dnsLookup: (address, callback) => callback(null, address),
      redisOptions: {
        tls: true,
        password:
          "YOUR_AUTH_PASSWORD",
      },
    }
  );

  return cluster;
};

const cluster = connectCluster();
cluster.set("name", "test");
cluster.get("name").then(r => {
  console.log(r); // <- you should see "test"
});

Hopefully this help you both @anax015obs and @jungRoit

Also like others mentioned in different Issues use: DEBUG=ioredis:* node redis_test.js in order to see more information about your specific error message.

Thanks, just one note here, tls is not boolean, so you can pass:

  const redisCluster = new Redis.Cluster([{ host, port }], {
    scaleReads: 'all',
    dnsLookup: (address, callback) => callback(null, address),
    redisOptions: {
      password,
      tls: {},
    },
  })

By the way this didnt fixed this issue for my case.

I ended up for using node-redis:
redis/node-redis#2768