Updated UpCloud terraform script to use private network and dynamic (#7779)

additional disks

contrib/terraform/upcloud/variables.tf

@@ -1,23 +1,40 @@
+variable "prefix" {
+  type    = string
+  default = "kubespray"
+
+  description = "Prefix that is used to distinguish these resources from others"
+}
 
 variable "zone" {
   description = "The zone where to run the cluster"
 }
 
-variable "hostname" {
-  default = "example.com"
+variable "template_name" {
+  description = "Block describing the preconfigured operating system"
 }
 
-variable "template_name" {}
+variable "username" {
+  description = "The username to use for the nodes"
+  default     = "ubuntu"
+}
 
-variable "username" {}
+variable "private_network_cidr" {
+  description = "CIDR to use for the private network"
+  default     = "172.16.0.0/24"
+}
 
 variable "machines" {
   description = "Cluster machines"
+
   type = map(object({
     node_type = string
     cpu       = string
     mem       = string
     disk_size = number
+    additional_disks = map(object({
+      size = number
+      tier = string
+    }))
   }))
 }
 
@@ -30,6 +47,10 @@ variable "inventory_file" {
   description = "Where to store the generated inventory file"
 }
 
-variable "UPCLOUD_USERNAME" {}
+variable "UPCLOUD_USERNAME" {
+  description = "UpCloud username with API access"
+}
 
-variable "UPCLOUD_PASSWORD" {}
+variable "UPCLOUD_PASSWORD" {
+  description = "Password for UpCloud API user"
+}