Now the custom domain works just like the invoke url, e.g.,

curl https://api.dev.interviewprep.onyxdevtutorials.com/api/v0/users

Author: davidsilva

terraform/environments/development/main.tf

@@ -170,14 +170,15 @@ module "dns" {
   backend_record_name = "api.dev.interviewprep.onyxdevtutorials.com"
   lb_dns_name = module.load_balancer.lb_dns_name
   lb_zone_id = module.load_balancer.lb_zone_id
-  api_invoke_url = replace(module.api_gateway.api_invoke_url, "/dev", "")
+  custom_domain_name = module.api_gateway.custom_domain_name
+  custom_domain_zone_id = module.api_gateway.custom_domain_zone_id
 }
 
 module "api_gateway" {
   source = "../../modules/api_gateway"
   environment = var.environment
-  # backend_dns_name = module.dns.backend_record_name
   cloudwatch_role_arn = module.iam.api_gateway_cloudwatch_role_arn
   lb_dns_name = module.load_balancer.lb_dns_name
   region = var.region
+  certificate_arn = var.certificate_arn
 }

terraform/environments/development/outputs.tf

@@ -139,13 +139,3 @@ output "backend_target_group_arn" {
     description = "The ARN of the backend target group"
     value = module.load_balancer.backend_target_group_arn
 }
-
-# output "api_key_id" {
-#     description = "The ID of the API Gateway API key"
-#     value = module.api_gateway.api_key_id
-# }
-
-output "api_invoke_url" {
-    description = "The invoke URL of the API Gateway"
-    value = module.api_gateway.api_invoke_url
-}

terraform/environments/development/variables.tf

@@ -107,4 +107,9 @@ variable "key_name" {
 variable "lambda_package_migrate" {
     description = "The path to the ZIP file containing the Lambda function code"
     type = string
+}
+
+variable "certificate_arn" {
+    description = "The ARN of the certificate to use for the custom domain"
+    type = string
 }

terraform/modules/api_gateway/main.tf

@@ -160,23 +160,18 @@ resource "aws_iam_role_policy_attachment" "api_gateway_cloudwatch_policy_attachm
     role = aws_iam_role.api_gateway_cloudwatch_role.name
 }
 
-# resource "aws_api_gateway_api_key" "api_key" {
-#     name = "${var.environment}-interview-prep-api-key"
-#     description = "API Key for Interview Prep ${var.environment} environment"
-#     enabled = true
-# }
-
-# resource "aws_api_gateway_usage_plan" "usage_plan" {
-#     name = "${var.environment}-interview-prep-usage-plan"
-#     description = "Usage Plan for Interview Prep ${var.environment} environment"
-#     api_stages {
-#         api_id = aws_api_gateway_rest_api.api.id
-#         stage = aws_api_gateway_stage.api_stage.stage_name
-#     }
-# }
-
-# resource "aws_api_gateway_usage_plan_key" "usage_plan_key" {
-#     key_id = aws_api_gateway_api_key.api_key.id
-#     key_type = "API_KEY"
-#     usage_plan_id = aws_api_gateway_usage_plan.usage_plan.id
-# }
+resource "aws_api_gateway_domain_name" "custom_domain" {
+  domain_name = "api.dev.interviewprep.onyxdevtutorials.com"
+
+  endpoint_configuration {
+    types = ["EDGE"]
+  }
+
+  certificate_arn = var.certificate_arn
+}
+
+resource "aws_api_gateway_base_path_mapping" "custom_domain_mapping" {
+  api_id = aws_api_gateway_rest_api.api.id
+  stage_name = aws_api_gateway_stage.api_stage.stage_name
+  domain_name = aws_api_gateway_domain_name.custom_domain.domain_name
+}

terraform/modules/api_gateway/outputs.tf

@@ -1,7 +1,9 @@
-output "api_invoke_url" {
-  value = "https://${aws_api_gateway_rest_api.api.id}.execute-api.${var.region}.amazonaws.com/dev"
+output "custom_domain_name" {
+  description = "The custom domain name"
+  value       = aws_api_gateway_domain_name.custom_domain.cloudfront_domain_name
 }
 
-# output "api_key_id" {
-#   value = aws_api_gateway_api_key.api_key.id
-# }
+output "custom_domain_zone_id" {
+  description = "The custom domain zone ID"
+  value       = aws_api_gateway_domain_name.custom_domain.cloudfront_zone_id
+}

terraform/modules/api_gateway/variables.tf

@@ -16,4 +16,9 @@ variable "cloudwatch_role_arn" {
 variable "lb_dns_name" {
   description = "The DNS name of the load balancer"
   type        = string
+}
+
+variable "certificate_arn" {
+  description = "The ARN of the certificate to use for the custom domain"
+  type        = string
 }

terraform/modules/dns/main.tf

@@ -13,8 +13,11 @@ resource "aws_route53_record" "frontend" {
 resource "aws_route53_record" "backend" {
   zone_id = var.zone_id
   name    = var.backend_record_name
-  type    = "CNAME"
+  type    = "A"
 
-  records = [replace(var.api_invoke_url, "https://", "")]
-  ttl     = 300
+  alias {
+    name = var.custom_domain_name
+    zone_id = var.custom_domain_zone_id
+    evaluate_target_health = false
+  }
 }

terraform/modules/dns/variables.tf

@@ -23,8 +23,12 @@ variable "lb_zone_id" {
     type        = string
 }
 
-variable "api_invoke_url" {
-    description = "The invoke URL of the API Gateway"
+variable "custom_domain_name" {
+    description = "The custom domain name for api"
+    type        = string
+}
+
+variable "custom_domain_zone_id" {
+    description = "The custom domain zone ID for api"
     type        = string
-    default = "placeholder"
 }