support multiple SSH CA key pairs

debian/main.tf

@@ -7,11 +7,11 @@ terraform {
 }
 
 module "invariants" {
-  source = "git::https://git.pim.kunis.nl/home/tf-modules.git//invariants"
+  source = "/home/pim/repos/tf-modules/invariants"
 }
 
 module "tf_debian_vm" {
-  source                = "git::https://git.pim.kunis.nl/pim/tf-debian-vm.git"
+  source                = "/home/pim/repos/tf-debian-vm"
   name                  = var.name
   domain_name           = var.domain_name
   admin_authorized_keys = coalesce(var.admin_authorized_keys, module.invariants.admin_authorized_keys)
@@ -24,6 +24,7 @@ module "tf_debian_vm" {
   bridge_name           = coalesce(var.bridge_name, module.invariants.bridge_name)
   ca_host               = module.invariants.ca_host
   ca_script             = module.invariants.ca_script
+  ca_key                = var.ca_key
   memory                = var.memory
   data_disk             = var.data_disk
   fixed_address         = var.fixed_address

debian/variables.tf

@@ -81,3 +81,8 @@ variable "disk_size" {
   type    = number
   default = 1024 * 1024 * 1024 * 15
 }
+
+variable "ca_key" {
+  type    = string
+  default = "dmz_host"
+}