changed the agent_nodepools to be a list

agents.tf

@@ -12,11 +12,11 @@ module "agents" {
   placement_group_id     = hcloud_placement_group.k3s.id
   location               = var.location
   server_type            = each.value.server_type
-  ipv4_subnet_id         = hcloud_network_subnet.subnet[index(keys(var.agent_nodepools), each.value.nodepool_name) + 2].id
+  ipv4_subnet_id         = hcloud_network_subnet.subnet[[for i, v in var.agent_nodepools : i if v.name == each.value.nodepool_name][0] + 2].id
 
   # We leave some room so 100 eventual Hetzner LBs that can be created perfectly safely
   # It leaves the subnet with 254 x 254 - 100 = 64416 IPs to use, so probably enough.
-  private_ipv4 = cidrhost(local.network_ipv4_subnets[index(keys(var.agent_nodepools), each.value.nodepool_name) + 2], each.value.index + 101)
+  private_ipv4 = cidrhost(local.network_ipv4_subnets[[for i, v in var.agent_nodepools : i if v.name == each.value.nodepool_name][0] + 2], each.value.index + 101)
 
   labels = {
     "provisioner" = "terraform",

locals.tf

@@ -1,6 +1,6 @@
 locals {
   # if we are in a single cluster config, we use the default klipper lb instead of Hetzner LB
-  is_single_node_cluster = var.control_plane_count + length(keys(var.agent_nodepools)) == 1
+  is_single_node_cluster = var.control_plane_count + length(var.agent_nodepools) == 1
   ssh_public_key         = trimspace(file(var.public_key))
   # ssh_private_key is either the contents of var.private_key or null to use a ssh agent.
   ssh_private_key = var.private_key == null ? null : trimspace(file(var.private_key))
@@ -170,10 +170,10 @@ locals {
   install_k3s_agent  = concat(local.common_commands_install_k3s, ["curl -sfL https://get.k3s.io | INSTALL_K3S_SKIP_START=true INSTALL_K3S_SKIP_SELINUX_RPM=true INSTALL_K3S_CHANNEL=${var.initial_k3s_channel} INSTALL_K3S_EXEC=agent sh -"], local.apply_k3s_selinux)
 
   agent_nodepools = merge([
-    for nodepool_name, nodepool_obj in var.agent_nodepools : {
+    for nodepool_obj in var.agent_nodepools : {
       for index in range(nodepool_obj.count) :
-      format("%s-%s", nodepool_name, index) => {
+      format("%s-%s", nodepool_obj.name, index) => {
-        nodepool_name : nodepool_name,
+        nodepool_name : nodepool_obj.name,
         server_type : nodepool_obj.server_type,
         index : index
       }

terraform.tfvars.example

@@ -28,17 +28,21 @@ control_plane_server_type = "cpx11"
 
 # As for the agent nodepools, below is just an example, if you do not want nodepools, just use one,
 # and change the name to what you want, it need not be "agent-big" or "agent-small", also give them the subnet prefer.
-# For single node clusters set this equal to {}
+# For single node clusters set this equal to [] or just set the counts to 0
-agent_nodepools = {
+# IMPORTANT: Once the cluster is created, you can change the count, and even set it to 0, but do not remove a nodepool from the list. 
-  agent-big = {
+# You can add others at the end of the list if you want.
+agent_nodepools = [
+  {
+    name        = "agent-small",
+    server_type = "cpx11",
+    count       = 2
+  },
+  {
+    name        = "agent-large",
     server_type = "cpx21",
     count       = 1
   }
-  agent-small = {
+]
-    server_type = "cpx11",
-    count       = 2
-  }
-}
 
 # That will depend on how much load you want it to handle, see https://www.hetzner.com/cloud/load-balancer
 load_balancer_type        = "lb11"

variables.tf

@@ -53,8 +53,8 @@ variable "load_balancer_disable_ipv6" {
 
 variable "agent_nodepools" {
   description = "Number of agent nodes."
-  type        = map(any)
+  type        = list(any)
-  default     = {}
+  default     = []
 }
 
 variable "hetzner_ccm_version" {