PLT-977 added support for multi-domain certs by enabling dns validati…

…on for SANs

README.md

@@ -45,12 +45,6 @@ Description: The Cloudflare API token.
 
 Type: `string`
 
-### <a name="input_zone_name"></a> [zone\_name](#input\_zone\_name)
-
-Description: The Name of the zone to contain this record.
-
-Type: `string`
-
 ## Optional Inputs
 
 The following input variables are optional (have default values):
@@ -103,11 +97,19 @@ Type: `string`
 
 Default: `""`
 
+### <a name="input_dns_validation_provider"></a> [dns\_validation\_provider](#input\_dns\_validation\_provider)
+
+Description: DNS validation provider setting for the domain name; either aws zone id or cloudflare
+
+Type: `string`
+
+Default: `"cloudflare"`
+
 ### <a name="input_subject_alternative_names"></a> [subject\_alternative\_names](#input\_subject\_alternative\_names)
 
-Description: A list of domains that should be SANs in the issued certificate
+Description: The list of domains and their dns providers as tuples; either aws zone id or cloudflare as dns provider
 
-Type: `list(string)`
+Type: `list(tuple([string, string]))`
 
 Default: `[]`
 
@@ -135,10 +137,6 @@ Default: `120`
 | Name | Description |
 |------|-------------|
 | <a name="output_acm_certificate_arn"></a> [acm\_certificate\_arn](#output\_acm\_certificate\_arn) | The ARN of the certificate |
-| <a name="output_acm_certificate_domain_validation_options"></a> [acm\_certificate\_domain\_validation\_options](#output\_acm\_certificate\_domain\_validation\_options) | A list of attributes to feed into other resources to complete certificate validation. Can have more than one element, e.g. if SANs are defined. |
-| <a name="output_distinct_domain_names"></a> [distinct\_domain\_names](#output\_distinct\_domain\_names) | List of distinct domains names used for the validation. |
-| <a name="output_validation_dns_record_fqdns"></a> [validation\_dns\_record\_fqdns](#output\_validation\_dns\_record\_fqdns) | List of FQDNs built using the zone domain and name. |
-| <a name="output_validation_domains"></a> [validation\_domains](#output\_validation\_domains) | List of distinct domain validation options. This is useful if subject alternative names contain wildcards. |
 
 <!-- TFDOCS_OUTPUTS_END -->
 

data.tf

@@ -1,4 +1,4 @@
 data "cloudflare_zone" "this" {
-  count = var.create_certificate ? 1 : 0
-  name  = var.zone_name
+  for_each = { for d, p in local.domain_validation_providers : d => p if p.provider == "cloudflare" }
+  name = each.value.zone_domain
 }

examples/san/main.tf

@@ -7,7 +7,7 @@ module "this" {
   domain_name = "test-san.${var.domain_name}"
 
   subject_alternative_names = [
-    "subdomain.test-san.${var.domain_name}",
-    "test-other.${var.domain_name}"
+    ["subdomain.test-san.${var.domain_name}", "cloudflare"],
+    ["test-other.${var.domain_name}", "cloudflare"]
   ]
 }

locals.tf

@@ -1,14 +1,21 @@
 locals {
-  # Get distinct list of domains and SANs
-  distinct_domain_names = distinct(
-    [for s in concat([var.domain_name], var.subject_alternative_names) : replace(s, "*.", "")]
-  )
+  # Creates a map of domains and their dns providers
+  domain_validation_providers = {
+    for v in concat([
+      [var.domain_name, var.dns_validation_provider]
+    ], var.subject_alternative_names) : v[0] => {
+      provider = v[1]
+      # if condition to check the root domain; flaconi.de vs www.flaconi.de
+      zone_domain = length(split(".", v[0])) == 2 ? v[0] : regex("^.+\\.(.+\\..+)$", v[0])[0]
+    }
+  }
 
-  # Get the list of distinct domain_validation_options, with wildcard
-  # domain names replaced by the domain name
-  validation_domains = var.create_certificate ? distinct(
-    [for k, v in aws_acm_certificate.this[0].domain_validation_options : merge(
-      tomap(v), { domain_name = replace(v.domain_name, "*.", "") }
-    )]
-  ) : []
+  # Enrich domain_validation_options with their dns providers
+  acm_domain_validation_options = var.create_certificate && var.validate_certificate ? [
+    for i, dvo in aws_acm_certificate.this[0].domain_validation_options :
+    merge(dvo, {
+      provider    = local.domain_validation_providers[dvo.domain_name]["provider"]
+      zone_domain = local.domain_validation_providers[dvo.domain_name]["zone_domain"]
+    })
+  ] : []
 }

main.tf

@@ -2,7 +2,7 @@ resource "aws_acm_certificate" "this" {
   count = var.create_certificate ? 1 : 0
 
   domain_name               = var.domain_name
-  subject_alternative_names = var.subject_alternative_names
+  subject_alternative_names = [for san in var.subject_alternative_names : san[0]]
   validation_method         = "DNS"
 
   options {
@@ -16,13 +16,29 @@ resource "aws_acm_certificate" "this" {
   }
 }
 
-resource "cloudflare_record" "validation" {
-  count = var.create_certificate && var.validate_certificate ? length(local.distinct_domain_names) : 0
+resource "aws_route53_record" "this" {
+  for_each = { for i, dvo in local.acm_domain_validation_options : dvo.domain_name => dvo if var.validate_certificate && dvo.provider != "cloudflare" }
 
-  zone_id = data.cloudflare_zone.this[0].id
-  name    = element(local.validation_domains, count.index)["resource_record_name"]
-  type    = element(local.validation_domains, count.index)["resource_record_type"]
-  content = replace(element(local.validation_domains, count.index)["resource_record_value"], "/.$/", "")
+  zone_id = each.value.provider
+  name    = each.value.resource_record_name
+  type    = each.value.resource_record_type
+  ttl     = var.dns_ttl
+
+  records = [each.value.resource_record_value]
+
+  allow_overwrite = var.validation_allow_overwrite_records
+
+  depends_on = [aws_acm_certificate.this]
+}
+
+resource "cloudflare_record" "this" {
+  for_each = { for i, dvo in local.acm_domain_validation_options : dvo.domain_name => dvo if var.validate_certificate && dvo.provider == "cloudflare" }
+
+  zone_id = data.cloudflare_zone.this[each.key].id
+  # https://github.com/cloudflare/terraform-provider-cloudflare/issues/2407#issuecomment-1960712054
+  name    = trimsuffix(each.value.resource_record_name, ".${each.value.zone_domain}.")
+  type    = each.value.resource_record_type
+  content = replace(each.value.resource_record_value, "/.$/", "")
   ttl     = var.dns_ttl
   proxied = false
 
@@ -36,5 +52,5 @@ resource "aws_acm_certificate_validation" "this" {
 
   certificate_arn = aws_acm_certificate.this[0].arn
 
-  validation_record_fqdns = cloudflare_record.validation.*.hostname
+  validation_record_fqdns = flatten([try(values(aws_route53_record.this).*.fqdn, []), try(values(cloudflare_record.this).*.hostname, [])])
 }

outputs.tf

@@ -1,24 +1,4 @@
 output "acm_certificate_arn" {
   description = "The ARN of the certificate"
-  value       = element(concat(aws_acm_certificate_validation.this.*.certificate_arn, aws_acm_certificate.this.*.arn, [""]), 0)
-}
-
-output "acm_certificate_domain_validation_options" {
-  description = "A list of attributes to feed into other resources to complete certificate validation. Can have more than one element, e.g. if SANs are defined."
-  value       = flatten(aws_acm_certificate.this.*.domain_validation_options)
-}
-
-output "validation_dns_record_fqdns" {
-  description = "List of FQDNs built using the zone domain and name."
-  value       = cloudflare_record.validation.*.hostname
-}
-
-output "distinct_domain_names" {
-  description = "List of distinct domains names used for the validation."
-  value       = local.distinct_domain_names
-}
-
-output "validation_domains" {
-  description = "List of distinct domain validation options. This is useful if subject alternative names contain wildcards."
-  value       = local.validation_domains
+  value       = var.create_certificate ? aws_acm_certificate.this[0].arn : null
 }

variables.tf

@@ -40,15 +40,16 @@ variable "domain_name" {
   default     = ""
 }
 
-variable "subject_alternative_names" {
-  description = "A list of domains that should be SANs in the issued certificate"
-  type        = list(string)
-  default     = []
+variable "dns_validation_provider" {
+  description = "DNS validation provider setting for the domain name; either aws zone id or cloudflare"
+  type        = string
+  default     = "cloudflare"
 }
 
-variable "zone_name" {
-  description = "The Name of the zone to contain this record."
-  type        = string
+variable "subject_alternative_names" {
+  description = "The list of domains and their dns providers as tuples; either aws zone id or cloudflare as dns provider"
+  type        = list(tuple([string, string]))
+  default     = []
 }
 
 variable "tags" {