resource "aws_instance" "example" {
  ami           = "ami-098792953bbd38e18"
  instance_type = "t2.micro"

}

resource "aws_ebs_volume" "ebs-volume-1" {
    availability_zone = "eu-west-1a"
    size = 160
    type = "st1"
    tags {
        Name = "more volume"
    }
}

resource "aws_volume_attachment" "ebs-volume-1-attachment" {
  device_name = "/dev/sdf"
  volume_id = "${aws_ebs_volume.ebs-volume-1.id}"
   instance_id = "${aws_instance.example.id}"
}