Aurora

Terraform module to create AWS RDS Aurora resources

Version

Repository

Submodules

dsql

Charged while it exists

These set the floor of the bill. They accrue from the moment they are created, even if nothing uses them.

RDS
aws_rds_cluster
Storage and I/O for the cluster; the instances below it are charged separately. Serverless v2 bills per capacity unit hour instead.
RDS
aws_rds_cluster_instance
Instance hours per writer and reader.

These stay near zero until there is traffic, and are the hardest to predict from source alone.

CloudWatch Logs
aws_cloudwatch_log_group
Per GB ingested, then per GB stored for as long as retention keeps it. Retention set to never expire is the usual surprise.
RDS
aws_rds_cluster_activity_stream
Free itself, but every event is written to Kinesis and to KMS, both of which bill for what arrives.

Not in the cost table yet, so they are reported rather than assumed free.

These carry no charge of their own, though some of them govern resources that do.

Application Auto Scaling
aws_appautoscaling_policy
Free itself. Decides where between the minimum and maximum capacity the service actually sits, so it sets the bill within those bounds.
Application Auto Scaling
aws_appautoscaling_target
Free itself, and the single most useful number for the bill: the capacity bounds decide how many tasks or instances can ever run.
IAM
aws_iam_role
IAM
aws_iam_role_policy_attachment
RDS
aws_db_parameter_group
RDS
aws_db_subnet_group
RDS
aws_rds_cluster_endpoint
RDS
aws_rds_cluster_parameter_group
RDS
aws_rds_cluster_role_association
A setting on another resource rather than a resource that bills. Whatever it governs is where the charge lands.
Secrets Manager
aws_secretsmanager_secret_rotation
VPC
aws_security_group
VPC
aws_vpc_security_group_egress_rule
VPC
aws_vpc_security_group_ingress_rule