Resource 'aws_elasticache_cluster.redis' does not have attribute 'cache_nodes.*.address' for variable 'aws_elasticache_cluster.redis.cache_nodes.*.address'

[hashibot]

This issue was originally opened by @iroller as hashicorp/terraform#7957. It was migrated here as part of the provider split. The original body of the issue is below.

---

Terraform Version

0.7.0

Affected Resource(s)

• aws_elasticache_cluster
• module outputs

Terraform Configuration Files

## Module
resource "aws_elasticache_cluster" "redis" {
  engine               = "redis"
...
}

// Addresses
output "addresses" {
  value = "${join(",", aws_elasticache_cluster.redis.cache_nodes.*.address)}"
}


## Using module
module "redis" {
...
}

output "redis_endpoint_addresses" {
  value = "${module.redis.addresses}"
}

Debug Output

[WARN] Output interpolation "addresses" failed: Resource 'aws_elasticache_cluster.redis' does not have attribute 'cache_nodes.*.address' for variable 'aws_elasticache_cluster.redis.cache_nodes.*.address'

Expected Behavior

I expected a string outout, e.g. "10.10.0.1,10.10.0.2"

Actual Behavior

No output at all.

References

• Resource 'aws_elasticache_cluster.redis' does not have attribute 'cache_nodes' for variable 'aws_elasticache_cluster.redis.*.cache_nodes' terraform#4703 - similar, but not sure if it's the same issue

[sstarcher]

I assumed I could work around this using

output nodes {
  value = "${var.replicas == "1" ?
      aws_elasticache_cluster.cache.cache_nodes.0.address :
      join(",",aws_elasticache_cluster.cache.cache_nodes.*.address)
  }"
}

but no luck anytime I reference aws_elasticache_cluster.cache.cache_nodes.*.address it drops the output

[fstuck37]

Hi All,
Was wondering if anyone had an update on this?
Thanks,
Fred

[bradleyess]

I also get no output with this, any updates/fixes on the horizon? Workarounds would also be appreciated.

[pberswe]

I have the same issue as described

[hbagdi]

Is there any update on this being fixed?
Happy to help out in fixing with some guidance.

[promiseofcake]

We also are having this issue.

[adybuxton]

I am also seeing a similar issue and i've raised a seperate issue here hashicorp/terraform#19964

[admssa]

The funny thing - next construction works for other resources but not for this one:
with registry_enabled = false

output "redis_endpoint" {
  value = "${var.registry_enabled ?  aws_elasticache_cluster.docker-registry-cache.cache_nodes.0.address : "nope" }"

it returns

Resource 'aws_elasticache_cluster.docker-registry-cache' does not have attribute 'cache_nodes.0.address' for variable 'aws_elasticache_cluster.docker-registry-cache.cache_nodes.0.address'

Created route 53 CNAME record as a temporary solution:

resource "aws_route53_record" "redis_endpoint" {
  count                = "${var.registry_enabled ? 1 : 0}"
 ....
  type                 = "CNAME"

  records = ["${aws_elasticache_cluster.docker-registry-cache.cache_nodes.0.address}"]
}

output "redis_endpoint" {
  value = "${var.registry_enabled ? join(",", aws_route53_record.redis_endpoint.*.fqdn)  : "not available"}"
}

[bflad]

Hi folks 👋 This issue is resolved in Terraform 0.12, which fully supports indexed splat (*) notation with list attribute values.

Given this configuration:

terraform {
  required_providers {
    aws = "2.20.0"
  }
  required_version = "0.12.5"
}

provider "aws" {
  region = "us-east-2"
}

resource "aws_elasticache_cluster" "test" {
  cluster_id      = "bflad-testing"
  engine          = "memcached"
  node_type       = "cache.t2.micro"
  num_cache_nodes = 3
}

output "test1" {
  value = aws_elasticache_cluster.test.cache_nodes[*].address
}

output "test2" {
  value = element(aws_elasticache_cluster.test.cache_nodes[*].address, 1)
}

output "test3" {
  value = join(",", formatlist("%s:%s", aws_elasticache_cluster.test.cache_nodes[*].address, aws_elasticache_cluster.test.cache_nodes[*].port))
}

We can get the various expected outputs that were problematic in Terraform 0.11 and earlier:

Outputs:

test1 = [
  "bflad-testing.asxu6y.0001.use2.cache.amazonaws.com",
  "bflad-testing.asxu6y.0002.use2.cache.amazonaws.com",
  "bflad-testing.asxu6y.0003.use2.cache.amazonaws.com",
]
test2 = bflad-testing.asxu6y.0002.use2.cache.amazonaws.com
test3 = bflad-testing.asxu6y.0001.use2.cache.amazonaws.com:11211,bflad-testing.asxu6y.0002.use2.cache.amazonaws.com:11211,bflad-testing.asxu6y.0003.use2.cache.amazonaws.com:11211

Enjoy! 🚀

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!