Add override template disk option

Author: LennertMertens

main.tf

@@ -111,7 +111,7 @@ resource "vsphere_virtual_machine" "Linux" {
     iterator = template_disks
     content {
       label            = length(var.disk_label) > 0 ? var.disk_label[template_disks.key] : "disk${template_disks.key}"
-      size             = data.vsphere_virtual_machine.template.disks[template_disks.key].size
+      size             = var.override_template_disk_size != null ? var.override_template_disk_size[template_disks.key] : data.vsphere_virtual_machine.template.disks[template_disks.key].size
       unit_number      = var.scsi_controller != null ? var.scsi_controller * 15 + template_disks.key : template_disks.key
       thin_provisioned = data.vsphere_virtual_machine.template.disks[template_disks.key].thin_provisioned
       eagerly_scrub    = data.vsphere_virtual_machine.template.disks[template_disks.key].eagerly_scrub

variables.tf

@@ -188,6 +188,12 @@ variable "data_disk_size_gb" {
   default     = []
 }
 
+variable "override_template_disk_size" {
+  description = "List of disk sizes to override template disk size."
+  type = list
+  default = null
+}
+
 variable "disk_datastore" {
   description = "Define where the OS disk should be stored."
   type        = string