use snapshots instead of hetzner images

hcloud-k3s-cluster/main.tf

@@ -31,15 +31,16 @@ resource "hcloud_ssh_key" "pubkey" {
 resource "hcloud_server" "k3s-node" {
   count = var.node_count
   name = "k3s-node-${count.index + 1}"
-  image = "ubuntu-22.04"
+  image = data.hcloud_image.packer_snapshot.id
   server_type = var.server_type
   ssh_keys = [ "${hcloud_ssh_key.pubkey.id}" ]
   location = var.server_location
-  rescue = "linux64"
   firewall_ids = [ hcloud_firewall.fw.id ]
+  placement_group_id = hcloud_placement_group.k3s-cluster-nodes.id
   depends_on = [
     hcloud_network_subnet.k3s-net,
-    hcloud_firewall.fw
+    hcloud_firewall.fw,
+    hcloud_placement_group.k3s-cluster-nodes
   ]
 }
 
@@ -159,3 +160,18 @@ resource "hcloud_firewall" "fw" {
   }
 
 }
+
+# placement group
+resource "hcloud_placement_group" "k3s-cluster-nodes" {
+  name = "k3s-cluster-nodes"
+  type = "spread"
+  labels = {
+    key = "value"
+  }
+}
+
+# packer snapshot
+data "hcloud_image" "packer_snapshot" {
+  with_selector = var.snapshot_selector
+  most_recent = true
+}

hcloud-k3s-cluster/vars.tf

@@ -14,6 +14,12 @@ variable "hetznerdns_token" {
   description = "hetznerdns API token"
 }
 
+variable "snapshot_selector" {
+  type = string
+  description = "snapshot selector for server creation"
+  default = "os-flavor=debian"
+}
+
 variable "node_count" {
   type = number
   default = 3