How to read the volume ID of the EC2 instance using Terraform

Question

Hi Team,

I have one EC2 instance in AWS. I have attached one volume to the instance. Can anyone tell me how to read the volume ID of the EC2 instance using Terraform?

Answer 1

Hi@akhtar,

You won't be able to extract EBS details from aws_instance since it's the AWS side that provides an EBS volume to the resource. But you can define an EBS data source with some filter.

data "aws_ebs_volume" "ebs_volume" {
  most_recent = true
  filter {
    name   = "attachment.instance-id"
    values = ["${aws_instance.DCOS-master3.id}"]
  }
}
output "ebs_volume_id" {
  value = "${data.aws_ebs_volume.ebs_volume.id}"
}