---
title: "POST /#Action=CreateDBCluster"
method: POST
path: "/#Action=CreateDBCluster"
---

# POST /#Action=CreateDBCluster

`POST /#Action=CreateDBCluster`

Creates a new Amazon Aurora DB cluster or Multi-AZ DB cluster.

If you create an Aurora DB cluster, the request creates an empty cluster. You must explicitly create the writer instance for your DB cluster using the [CreateDBInstance](https://docs.aws.amazon.com/AmazonRDS/latest/APIReference/API_CreateDBInstance.html) operation. If you create a Multi-AZ DB cluster, the request creates a writer and two reader DB instances for you, each in a different Availability Zone.

You can use the `ReplicationSourceIdentifier` parameter to create an Amazon Aurora DB cluster as a read replica of another DB cluster or Amazon RDS for MySQL or PostgreSQL DB instance. For more information about Amazon Aurora, see [What is Amazon Aurora?](https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/CHAP_AuroraOverview.html) in the _Amazon Aurora User Guide_.

You can also use the `ReplicationSourceIdentifier` parameter to create a Multi-AZ DB cluster read replica with an RDS for MySQL or PostgreSQL DB instance as the source. For more information about Multi-AZ DB clusters, see [Multi-AZ DB cluster deployments](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/multi-az-db-clusters-concepts.html) in the _Amazon RDS User Guide_.

## Query parameters

- `Action` 'CreateDBCluster', required
- `Version` '2014-10-31', required

## Response `200`

Success

## Other responses

- `480` — DBClusterAlreadyExistsFault
- `481` — InsufficientStorageClusterCapacityFault
- `482` — DBClusterQuotaExceededFault
- `483` — StorageQuotaExceededFault
- `484` — DBSubnetGroupNotFoundFault
- `485` — InvalidVPCNetworkStateFault
- `486` — InvalidDBClusterStateFault
- `487` — InvalidDBSubnetGroupStateFault
- `488` — InvalidSubnet
- `489` — InvalidDBInstanceStateFault
- `490` — DBClusterParameterGroupNotFoundFault
- `491` — KMSKeyNotAccessibleFault
- `492` — DBClusterNotFoundFault
- `493` — DBInstanceNotFoundFault
- `494` — DBSubnetGroupDoesNotCoverEnoughAZs
- `495` — GlobalClusterNotFoundFault
- `496` — InvalidGlobalClusterStateFault
- `497` — DomainNotFoundFault

---

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