Merge branch 'fix-hcloud-vm-migrations' into 'master'

improve terraform handling of virtual machine domains

See merge request !280

tf-stage1/archlinux.tf

@@ -36,7 +36,7 @@ locals {
   #
   # Valid parameters are:
   #   - server_type (mandatory)
-  #   - domain (mandatory)
+  #   - domain (optional, creates dns entry <domain>.archlinux.org pointing to the machine)
   #   - ttl (optional, applies to the dns entries)
   #   - zone (optionel, required for pkgbuild.com machines)
   #
@@ -81,7 +81,6 @@ locals {
     }
     "lists.archlinux.org" = {
       server_type = "cx11"
-      domain      = "lists"
     }
     "mail.archlinux.org" = {
       server_type = "cx11"

tf-stage1/templates.tf

@@ -116,7 +116,9 @@ resource "hcloud_server" "machine" {
 }
 
 resource "hetznerdns_record" "machine_a" {
-  for_each = local.machines
+  for_each = {
+    for name, machine in local.machines : name => machine if can(machine.domain)
+  }
 
   zone_id = lookup(local.machines[each.key], "zone", hetznerdns_zone.archlinux.id)
   name    = each.value.domain
@@ -126,7 +128,9 @@ resource "hetznerdns_record" "machine_a" {
 }
 
 resource "hetznerdns_record" "machine_aaaa" {
-  for_each = local.machines
+  for_each = {
+    for name, machine in local.machines : name => machine if can(machine.domain)
+  }
 
   zone_id = lookup(local.machines[each.key], "zone", hetznerdns_zone.archlinux.id)
   name    = each.value.domain