feat: support rds cluster serverless v2

infracost-usage-example.yml

@@ -336,7 +336,7 @@ resource_usage:
 
  aws_rds_cluster_instance.my_cluster:
  monthly_cpu_credit_hrs: 24 # Number of hours in a month, where you expect to burst the baseline credit balance of a "t3" instance type.
- vcpu_count: 2 # # (DEPRECATED this is now calculated automatically) Number of virtual CPUs allocated to your "t3" instance type. Currently instances with 2 vCPUs are available.
+ vcpu_count: 2 # Number of virtual CPUs allocated to your "t3" instance type. Currently instances with 2 vCPUs are available.
  monthly_additional_performance_insights_requests: 10000 # Monthly Performance Insights API requests above the 1000000 requests included in the free tier.
  reserved_instance_term: 1_year # Term for Reserved Instances, can be: 1_year, 3_year.
  reserved_instance_payment_option: partial_upfront # Payment option for Reserved Instances, can be: no_upfront (only for 1_year term), partial_upfront, all_upfront.

internal/providers/terraform/aws/testdata/rds_cluster_instance_test/rds_cluster_instance_test.tf

@@ -139,3 +139,26 @@ resource "aws_rds_cluster_instance" "extended_support" {
  engine_version = each.value.version
  instance_class = "db.t3.large"
 }
+
+resource "aws_rds_cluster" "serverless_v2" {
+ cluster_identifier = "serverless-v2"
+ engine = "aurora-postgresql"
+ engine_mode = "provisioned"
+ engine_version = "13.6"
+ database_name = "test"
+ master_username = "test"
+ master_password = "must_be_eight_characters"
+ storage_encrypted = true
+
+ serverlessv2_scaling_configuration {
+ max_capacity = 1.0
+ min_capacity = 0.5
+ }
+}
+
+resource "aws_rds_cluster_instance" "serverless_v2_instance" {
+ cluster_identifier = aws_rds_cluster.serverless_v2.id
+ instance_class = "db.serverless"
+ engine = aws_rds_cluster.serverless_v2.engine
+ engine_version = aws_rds_cluster.serverless_v2.engine_version
+}

internal/providers/terraform/aws/testdata/rds_cluster_instance_test/rds_cluster_instance_test.usage.yml

@@ -21,3 +21,5 @@ resource_usage:
  aws_rds_cluster_instance.cluster_instance_3yr_all_upfront:
  reserved_instance_term: 3_year
  reserved_instance_payment_option: all_upfront
+ aws_rds_cluster_instance.serverless_v2_instance:
+ vcpu_count: 2

internal/resources/aws/rds_cluster_instance.go

@@ -108,7 +108,7 @@ func (r *RDSClusterInstance) BuildResource() *schema.Resource {
  // VCPU count has been set explicitly
  instanceVCPUCount = decimal.NewFromInt(*r.VCPUCount)
  } else if count, ok := InstanceTypeToVCPU[strings.TrimPrefix(r.InstanceClass, "db.")]; ok {
- // We were able to lookup thing VCPU count
+ // We were able to lookup the VCPU count
  instanceVCPUCount = decimal.NewFromInt(count)
  }