unknown key: network_interface when attaching elastic IP to network interface

[Jaime Soriano Pastor]

Hi,

I'm trying to create an AWS EC2 instance with a network interface associated to an elastic IP, but it seems like the aws_eip resource doesn't accept a network_interface, when running terraform plan I get:

Errors:

  * aws_eip.java: : invalid or unknown key: network_interface

The code is like this:

resource "aws_instance" "java" {

    ami = "${lookup(var.java_amis, var.region)}"

    key_name = "${var.key_name}"

    instance_type = "t2.micro"

    subnet_id = "${lookup(var.subnet_ids, var.region)}"

}

resource "aws_network_interface" "java" {

    subnet_id = "${lookup(var.subnet_ids, var.region)}"

    attachment {

        instance = "${aws_instance.java.id}"

        device_index = 1

    }

}

resource "aws_eip" "java" {

    network_interface = "${aws_network_interface.java.id}"

}

output "ip" {

    value = "${aws_eip.java.public_ip}"

}

What am I doing wrong?

Thanks!

[Andrew Langhorn]

The aws_eip resource takes instance as an ID, not network_interface as an ID. https://terraform.io/docs/providers/aws/r/eip.html

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[Jaime Soriano Pastor]

According to documentation network interface is also supported:

The following arguments are supported:

• vpc - (Optional) Boolean if the EIP is in a VPC or not.
  
• instance - (Optional) EC2 instance ID.
  
• network_interface - (Optional) Network interface ID to associate with.
  

And there seems to be also a test case covering this argument: https://github.com/hashicorp/terraform/blob/master/builtin/providers/aws/resource_aws_eip_test.go#L211

[Jaime Soriano Pastor]

It was a problem with my terraform installation, latest official version works fine.