use snapshots instead of hetzner images

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-${count.index + 1}"
-  image = var.image_name
+  image = data.hcloud_image.packer_snapshot.id
   server_type = var.server_type
   ssh_keys = [ "${hcloud_ssh_key.pubkey.id}" ]
   location = var.server_location
@@ -169,3 +169,9 @@ resource "hcloud_placement_group" "k3s-cluster-nodes" {
     key = "value"
   }
 }
+
+# packer snapshot
+data "hcloud_image" "packer_snapshot" {
+  with_selector = var.snapshot_selector
+  most_recent = true
+}

hcloud-k3s-cluster/vars.tf

@@ -14,10 +14,10 @@ variable "hetznerdns_token" {
   description = "hetznerdns API token"
 }
 
-variable "image_name" {
+variable "snapshot_selector" {
   type = string
-  description = "hetzner cloud image name"
-  default = "ubuntu-22.04"
+  description = "snapshot selector for server creation"
+  default = "os-flavor=debian"
 }
 
 variable "node_count" {