add mailgun setup

terraform/dependencies/mailgun/main.tf

@@ -0,0 +1,52 @@
+data "google_dns_managed_zone" "main" {
+  name = var.dns_zone
+}
+
+resource "google_dns_record_set" "mailgun_mx" {
+  name = data.google_dns_managed_zone.main.dns_name
+  type = "MX"
+  ttl  = 300
+
+  managed_zone = data.google_dns_managed_zone.main.name
+
+  rrdatas = [
+    "10 mxa.mailgun.org",
+    "10 mxb.mailgun.org"
+  ]
+}
+
+resource "google_dns_record_set" "mailgun_verification" {
+  name = data.google_dns_managed_zone.main.dns_name
+  type = "TXT"
+  ttl  = 300
+
+  managed_zone = data.google_dns_managed_zone.main.name
+
+  rrdatas = [
+    "v=spf1 include:mailgun.org ~all"
+  ]
+}
+
+resource "google_dns_record_set" "mailgun_verification_domainkey" {
+  name = "krs._domainkey.${data.google_dns_managed_zone.main.dns_name}"
+  type = "TXT"
+  ttl  = 300
+
+  managed_zone = data.google_dns_managed_zone.main.name
+
+  rrdatas = [
+    var.verification
+  ]
+}
+
+resource "google_dns_record_set" "mailgun_tracking" {
+  name = "email.${data.google_dns_managed_zone.main.dns_name}"
+  type = "CNAME"
+  ttl  = 300
+
+  managed_zone = data.google_dns_managed_zone.main.name
+
+  rrdatas = [
+    "mailgun.org"
+  ]
+}

terraform/dependencies/mailgun/variables.tf

@@ -0,0 +1,9 @@
+variable "dns_zone" {
+  description = "Name of the DNS zone"
+  type        = string
+}
+
+variable "verification" {
+  description = "Verification domainkey value provided from Mailgun settings"
+  type        = string
+}

terraform/environments/production/dns.tf

@@ -37,3 +37,10 @@ module "dutyfree_address" {
   dns_zone  = var.dns_zone
   subdomain = "resource-types"
 }
+
+module "mailgun_records" {
+  source = "../../dependencies/mailgun"
+
+  dns_zone     = var.dns_zone
+  verification = "k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCiXNfw2u/anSOEvASvp94Rt+sp4ujO/AETVVtnqT3MC3By1EZBD8b0JowMZZKGkT9RwstC55fM66hhuJ0Az0lUZql2hex96k3mZjNUghaMoiPbIxa7bjYI2+vVEGIq5Y95PUJnKZMqEhe4WTob+vWGBsmKxHTr0lueShiO9fXFfwIDAQAB"
+}