Started to add disks modules.

modules/aws-disk-mounts/main.tf

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+resource "aws_volume_attachment" "mount-volume" {
+  device_name = "/dev/sd${element(var.drive-letters, count.index)}"
+  instance_id = var.ec2-id
+  count = length(var.disks)
+  volume_id = element(var.disks, count.index).id
+}

modules/aws-disk-mounts/variables.tf

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+variable "drive-letters" {
+  default = ["f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
+  description = "These drive letters will be used when arraching disks to EC2 instance with `ec2-id'"
+  type = list(string)
+  nullable = false
+}
+
+variable "disks" {
+  description = "An array of disks to attach to the EC2 isntance with `ec2-id`"
+  type = list
+}
+
+variable "ec2-id" {
+  description = "The ID of the EC@ instance to attach the drives to."
+  type = string
+}

modules/aws-disks/main.tf

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+
+resource "aws_ebs_volume" "disks" {
+  availability_zone = var.availability_zone
+  size = var.size
+  count = var.num
+  encrypted = true
+  tags = {
+    Name = "${var.prefix}-${count.index}"
+  }
+}

modules/aws-disks/outputs.tf

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+output "disks" {
+  value = aws_ebs_volume.disks
+}

modules/aws-disks/variables.tf

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+variable "availability_zone" {
+  description = "The availability zone this disk will reside in. This AZ is applied to all 'num' disks."
+  type = string
+}
+
+variable "num" {
+  description = "The number of disks to be created with this config."
+  type = number
+}
+
+variable "prefix" {
+  description = "This prefix will be used in the name of each disk created with this module. If the prefix is 'zfs', then it will create disks with names, zfs-0 and zfs-1."
+  type = string
+}
+
+variable "size" {
+  description = "The size of the disk in GB."
+  type = number
+}