Terraform module requires setting tags to avoid error

[orangejulius]

We just discovered an issue with this Terraform module, fortunately there's a workaround.

An error like the following will be seen when creating the aws_launch_template when running terraform apply if there are no tags specified in the module configuration:

* module.elasticsearch-prod-a.aws_launch_template.elasticsearch: 1 error occurred:
* aws_launch_template.elasticsearch: InvalidRequest: The request received was invalid.
status code: 400, request id: ...

The issue is fixed by ensuring you define some custom tags when using the module.

module "elasticsearch-dev" {
  # .... the rest of the module configuration

  # define any set of tags such as the following
  tags {
    env = "dev"
  }
}

Under the hood, we need to determine a way to pass a default set of (empty) tags to the Launch Configuration without causing an error, so that we can fix this issue.

terraform-elasticsearch/main.tf

Lines 31 to 34 in 74c349d

	tag_specifications {
	resource_type = "instance"
	tags = "${var.tags}"
	}