make image name configurable

hcloud-k3s-cluster/main.tf

@@ -31,7 +31,7 @@ resource "hcloud_ssh_key" "pubkey" {
 resource "hcloud_server" "k3s-node" {
   count = var.node_count
   name = "k3s-node-${count.index + 1}"
-  image = "ubuntu-22.04"
+  image = var.image_name
   server_type = var.server_type
   ssh_keys = [ "${hcloud_ssh_key.pubkey.id}" ]
   location = var.server_location

hcloud-k3s-cluster/vars.tf

@@ -14,6 +14,12 @@ variable "hetznerdns_token" {
   description = "hetznerdns API token"
 }
 
+variable "image_name" {
+  type = string
+  description = "hetzner cloud image name"
+  default = "ubuntu-22.04"
+}
+
 variable "node_count" {
   type = number
   default = 3