Multiple instances with 2 EBS volumes each

main.tf

variable "count" {}

resource "aws_instance" "server" {
  ami           = "ami-7ea88d1b"
  instance_type = "t2.micro"
  key_name = "normal"
  count = "${var.count}"
}

resource "aws_ebs_volume" "volume1" {
  availability_zone = "${aws_instance.server.*.availability_zone[count.index]}"
  type              = "gp2"
  size              = 1
  count = "${aws_instance.server.count}"
}

resource "aws_volume_attachment" "volume1-volume-attachment" {
  device_name = "/dev/xvdb"
  instance_id = "${aws_instance.server.*.id[count.index]}"
  volume_id   = "${aws_ebs_volume.volume1.*.id[count.index]}"
  count = "${aws_instance.server.count}"
}

# Second volume
resource "aws_ebs_volume" "volume2" {
  availability_zone = "${aws_instance.server.*.availability_zone[count.index]}"
  type              = "gp2"
  size              = 2
  count = "${aws_instance.server.count}"
}


resource "aws_volume_attachment" "volume2-volume-attachment" {
  device_name = "/dev/xvdc"
  instance_id = "${aws_instance.server.*.id[count.index]}"
  volume_id   = "${aws_ebs_volume.volume2.*.id[count.index]}"
  count = "${aws_instance.server.count}"
}