Adding multiple subnets to Elasticsearch Resource with zone awareness

[ranvijayj]

Hi there,

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Terraform Version

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0.11

Affected Resource(s)

Please list the resources as a list, for example:

• opc_instance
• opc_storage_volume

AWS Elasticsearch domain

If this issue appears to affect multiple resources, it may be an issue with Terraform's core, so please mention this.

Terraform Configuration Files

module.vpc.public_subnets is a list of public subnets

enable_zone_awareness = true
.
.
.
 vpc_options {
    security_group_ids = ["${aws_security_group.elasticsearch.id}"]
    subnet_ids         = ["${module.vpc.public_subnets[0]}, ${module.vpc.public_subnets[1]}"]
  }

So, I try and pass subnets with list [0] and list [1]

Debug Output

Please provide a link to a GitHub Gist containing the complete debug output: https://www.terraform.io/docs/internals/debugging.html. Please do NOT paste the debug output in the issue; just paste a link to the Gist.

When I terraform apply below happens:

vpc_option
tags.Domain: "" => "dev2"
vpc_options.#: "" => "1"
vpc_options.0.availability_zones.#: "" => ""
vpc_options.0.security_group_ids.#: "" => "1"
vpc_options.0.security_group_ids.3025683553: "" => "sg-c48d2aba"
vpc_options.0.subnet_ids.#: "" => "1"
vpc_options.0.subnet_ids.4075328369: "" => "subnet-c9cf7fb0, subnet-b02dfefb"
vpc_options.0.vpc_id: "" => ""

1 error(s) occurred:

• aws_elasticsearch_domain.es: 1 error(s) occurred:
• aws_elasticsearch_domain.es: ValidationException: You must specify exactly two subnets.

Panic Output

If Terraform produced a panic, please provide a link to a GitHub Gist containing the output of the crash.log.

Expected Behavior

What should have happened?

How do I make ES subnets_ids accept 2 values from the list module.vpc.public_subnets? so as to enable zone awareness?

Actual Behavior

What actually happened?

Steps to Reproduce

Please list the steps required to reproduce the issue, for example:

1. terraform apply

Important Factoids

Are there anything atypical about your accounts that we should know? For example: Running in EC2 Classic? Custom version of OpenStack? Tight ACLs?

References

Are there any other GitHub issues (open or closed) or Pull Requests that should be linked here? For example:

• Make aws_iam_policy_attachment warning less opaque #1234

[catsby]

Hello –

Can you share how module.vpc.public_subnets is defined?
If it's a list, can you try subnet_ids = "${module.vpc.public_subnets}"?

[AndyMoore]

i literally just hit this problem and went looking for an answer this morning, and found this. my fix was:

-    subnet_ids = ["${var.db_subnet_ids[0]}, ${var.db_subnet_ids[1]}"]
+    subnet_ids = ["${var.db_subnet_ids[0]}", "${var.db_subnet_ids[1]}"]

which gives the output as:

  vpc_options.0.subnet_ids.3267634451:                        "" => "subnet-3223f079"
  vpc_options.0.subnet_ids.51930061:                          "" => "subnet-05c4747c"

[catsby]

I imagine subnet_ids = "${module.vpc.public_subnets}" would also work, maybe you could verify? Either way, I'm going to close this issue for now. Thanks!

[AndyMoore]

it needs a total of 2, so need to be explicit

[shivpathak]

Recently AWS announced to support 3 availability zones for Elasticsearch but I see terraform still lacking this feature, I think we need to add support of 3 explicit subnet support in terraform.

reference of aws announcement is: https://aws.amazon.com/about-aws/whats-new/2019/02/amazon-elasticsearch-service-now-supports-three-availability-zone-deployments/

[gposton]

@catsby can we re-open this given @shivpathak's comment above. AWS just released support for 3 AZ's, but it looks as if terraform still doesn't support it.

[gposton]

@catsby I tried #4038 (comment) and #4038 (comment). No luck.... I think this needs re-opened.

[kzw]

When I create the cluster using terraform I can confirm this error with provider aws 2.5.0 and terraform 0.11.13.

What is odd is that one can create a cluster using the web console and import the existing cluster into the same config with no problem.

[hdryx]

I'm having also the same problem, unable to use more than one subnet

vpc_options {
    subnet_ids = ["${data.aws_subnet.private_1.id}", "${data.aws_subnet.private_2.id}"]

    security_group_ids = ["${aws_security_group.es.id}"]
  }

Error: ValidationException: You must specify exactly one subnet.

I have terraform 0.12.1 and provider.aws v2.14.0

[hdryx]

Ok, we have to add set zone_awareness_enabled = true to be able to deploy on multiple subnets.

[shivpathak]

@catsby can we re-open this given @shivpathak's comment above. AWS just released support for 3 AZ's, but it looks as if terraform still doesn't support it.

Finally we got this (elasticsearch 3 az support in terraform) done. it's release in terraform-provider-aws version v2.20.0

reference linke - #9398

[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!