feat: added weighted routing policy (#23)

.gitignore

@@ -2,3 +2,4 @@
 terraform.tfstate
 *.tfstate*
 terraform.tfvars
+.terraform.lock.hcl

examples/complete/main.tf

@@ -63,6 +63,26 @@ module "records" {
         zone_id = module.cloudfront.this_cloudfront_distribution_hosted_zone_id
       }
     },
+    {
+      name           = "test"
+      type           = "CNAME"
+      ttl            = "5"
+      records        = ["test.example.com."]
+      set_identifier = "test-primary"
+      weighted_routing_policy = {
+        weight = 90
+      }
+    },
+    {
+      name           = "test"
+      type           = "CNAME"
+      ttl            = "5"
+      records        = ["test2.example.com."]
+      set_identifier = "test-secondary"
+      weighted_routing_policy = {
+        weight = 10
+      }
+    }
   ]
 
   depends_on = [module.zones]
@@ -101,11 +121,9 @@ module "cloudfront" {
     }
   }
 
-  cache_behavior = {
-    default = {
-      target_origin_id       = "s3_bucket"
-      viewer_protocol_policy = "allow-all"
-    }
+  default_cache_behavior = {
+    target_origin_id       = "s3_bucket"
+    viewer_protocol_policy = "allow-all"
   }
 
   viewer_certificate = {

modules/records/main.tf

 locals {
   # convert from list to map with unique keys
-  recordsets = { for rs in var.records : "${rs.name} ${rs.type}" => rs }
+  recordsets = { for rs in var.records : join(" ", compact(["${rs.name} ${rs.type}", lookup(rs, "set_identifier", "")])) => rs }
 }
 
 data "aws_route53_zone" "this" {
@@ -16,10 +16,11 @@ resource "aws_route53_record" "this" {
 
   zone_id = data.aws_route53_zone.this[0].zone_id
 
-  name    = each.value.name != "" ? "${each.value.name}.${data.aws_route53_zone.this[0].name}" : data.aws_route53_zone.this[0].name
-  type    = each.value.type
-  ttl     = lookup(each.value, "ttl", null)
-  records = lookup(each.value, "records", null)
+  name           = each.value.name != "" ? "${each.value.name}.${data.aws_route53_zone.this[0].name}" : data.aws_route53_zone.this[0].name
+  type           = each.value.type
+  ttl            = lookup(each.value, "ttl", null)
+  records        = lookup(each.value, "records", null)
+  set_identifier = lookup(each.value, "set_identifier", null)
 
   dynamic "alias" {
     for_each = length(keys(lookup(each.value, "alias", {}))) == 0 ? [] : [true]
@@ -30,4 +31,12 @@ resource "aws_route53_record" "this" {
       evaluate_target_health = lookup(each.value.alias, "evaluate_target_health", false)
     }
   }
+
+  dynamic "weighted_routing_policy" {
+    for_each = length(keys(lookup(each.value, "weighted_routing_policy", {}))) == 0 ? [] : [true]
+
+    content {
+      weight = each.value.weighted_routing_policy.weight
+    }
+  }
 }