Create Aurora Postgress Serverless Instance

aurora.ts

 # Define Aurora Serverless v2 PostgreSQL cluster
 self.aurora_cluster = rds.DatabaseCluster(
     self,
     "AuroraServerlessCluster",
     engine=rds.DatabaseClusterEngine.aurora_postgres(version=rds.AuroraPostgresEngineVersion.VER_16_6),
     writer=rds.ClusterInstance.provisioned(
         "writer", instance_type=ec2.InstanceType.of(ec2.InstanceClass.R6G, ec2.InstanceSize.LARGE)
     ),
     serverless_v2_min_capacity=0,  # allow auto pause
     serverless_v2_max_capacity=8,
     readers=[
         # will be put in promotion tier 1 and will scale with the writer
         rds.ClusterInstance.serverless_v2("reader1", scale_with_writer=True),
         # will be put in promotion tier 2 and will not scale with the writer
         rds.ClusterInstance.serverless_v2("reader2"),
     ],
     vpc=self.vpc,
     vpc_subnets=ec2.SubnetSelection(subnet_type=ec2.SubnetType.PRIVATE_WITH_EGRESS),
     credentials=rds.Credentials.from_secret(self.db_credentials_secret),
     storage_encryption_key=kms.Key.from_key_arn(self, "ServerlessKMSKeyArn", kms_key.key_arn),
     default_database_name=self.DATABASE_NAME,
     removal_policy=RemovalPolicy.DESTROY,  # Cleanup for test environments
 )