refactor: Support multiple mx records per domain

terraform/modules/domain/main.tf

@@ -29,17 +29,16 @@ resource "hcloud_zone_rrset" "aaaa" {
 }
 
 resource "hcloud_zone_rrset" "mx" {
-  count = var.hasMXRecord ? 1 : 0
+  count = length(var.mxRecords) > 0 ? 1: 0
 
   zone = var.domain
   name = var.subdomain != "" ? var.subdomain : "@"
   type = "MX"
   ttl  = 3600
 
-  change_protection = true
-
   records = [
-    { value = format("%s %s.", var.mxPrio, var.hostName) }
+    for record in var.mxRecords:
+    { value = format("%s %s.", record.prio, record.hostname) }
   ]
 }
 

terraform/modules/domain/variables.tf

@@ -17,24 +17,17 @@ variable "subdomain" {
   default = ""
 }
 
-variable "hasMXRecord" {
-  type    = bool
-  default = false
-}
-
 variable "hasIPRecords" {
   type    = bool
   default = true
 }
 
-variable "hostName" {
-  type    = string
-  default = ""
-}
-
-variable "mxPrio" {
-  type    = number
-  default = 0
+variable "mxRecords" {
+  type    = list(object({
+    hostname: string,
+    prio: number
+  }))
+  default = []
 }
 
 variable "txtValues" {

terraform/nameserver-records.tf

@@ -28,7 +28,6 @@ module "at_proto_domain" {
   domain       = hcloud_zone.twomartens_de.name
   subdomain    = "_atproto"
   hasIPRecords = false
-  hasMXRecord  = false
   txtValues = [
     "did=did:plc:dboupmredm5i3vktwci6nbip"
   ]

terraform/uberspace.tf

@@ -1,13 +1,14 @@
 // Identity management
 module "keycloak_domain" {
-  source             = "./modules/domain"
-  domain             = hcloud_zone.twomartens_de.name
-  subdomain          = "id"
-  ipv4               = "95.143.172.184"
-  ipv6               = "2001:1a50:11:0:98b3:92ff:fe3e:bba1"
-  hasMXRecord        = true
-  hostName           = "monoceres.uberspace.de"
-  mxPrio             = 0
+  source    = "./modules/domain"
+  domain    = hcloud_zone.twomartens_de.name
+  subdomain = "id"
+  ipv4      = "95.143.172.184"
+  ipv6      = "2001:1a50:11:0:98b3:92ff:fe3e:bba1"
+  mxRecords = [{
+    hostname : "monoceres.uberspace.de"
+    prio : 0
+  }]
   txtValues          = ["v=spf1 include:spf.uberspace.de ~all"]
   uberspaceDomainKey = "v=DKIM1;t=s;n=core;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqs3bFL8W77z7VJHCFbsJ3o68Y1uBbVsbIS1y35CMfRv6wp7si7aIG2ZeKqzdh2dTMsvtvSMaYVq1gT/EtRmTbU/BYC21ff8sqcVqn/ll5nNsk5jKWXTYAlTQp4LBQN7icw94ZNGr5/SDYcnv2nsBYFf2GUviObWXGHX4RaBFNj9NVUNWNin/HicvW+LsbfYq37QtlhjmUn9K96VCwKcTV1mx+Ek0osErYefcOVNawqWIlVRQDLkHZhk1StLsOpRqV+qEjhzTk4n4ZiNtLJG1D9CpHl24d5DKsQDyVFdEfqHimFTSNgiitlkuXg+i+NMiRA9G3gNJtvw8uvfN8f+stQIDAQAB"
 }
@@ -49,14 +50,15 @@ module "statping_domain" {
 
 // Personal Website
 module "personal_website_domain" {
-  source      = "./modules/domain"
-  domain      = hcloud_zone.twomartens_de.name
-  subdomain   = ""
-  ipv4        = "185.26.156.65"
-  ipv6        = "2a00:d0c0:200:0:b9:1a:9c:40"
-  hasMXRecord = true
-  hostName    = "howell.uberspace.de"
-  mxPrio      = 0
+  source    = "./modules/domain"
+  domain    = hcloud_zone.twomartens_de.name
+  subdomain = ""
+  ipv4      = "185.26.156.65"
+  ipv6      = "2a00:d0c0:200:0:b9:1a:9c:40"
+  mxRecords = [{
+    hostname : "howell.uberspace.de"
+    prio : 0
+  }]
   txtValues = [
     "openai-domain-verification=dv-EcR0SCNAnUYVquVZVgb21Wdt",
     "google-site-verification=nUFiHQFxBpBMdX96ELH3TcfyIfXf2ZlwMFYtXjVq5lo",
@@ -86,9 +88,10 @@ module "appreview_domain" {
   subdomain = "appreview"
 
   hasIPRecords = false
-  hasMXRecord  = true
-  hostName     = "wolf.uberspace.de"
-  mxPrio       = 0
+  mxRecords = [{
+    hostname : "wolf.uberspace.de"
+    prio : 0
+  }]
   txtValues = [
     "v=spf1 include:spf.uberspace.de ~all"
   ]
@@ -102,4 +105,4 @@ module "cms_domain" {
   subdomain = "cms"
   ipv4      = "95.143.172.212"
   ipv6      = "2001:1a50:11:0:247a:8ff:fe00:5f6c"
-}
+}