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ApsaraDB RDS:CreateDBNodes

Last Updated:Aug 28, 2026

Adds a node to an ApsaraDB RDS for MySQL or ApsaraDB RDS for PostgreSQL instance that runs RDS Cluster Edition. An RDS instance that runs RDS Cluster Edition is referred to as an RDS cluster.

Operation description

Supported database engines

MySQL

References

Note Before you call this operation, carefully read the following documentation. Make sure that you fully understand the prerequisites and impacts for calling this operation.

Add a node to an ApsaraDB RDS for MySQL cluster

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

  • Operation: the value that you can use in the Action element to specify the operation on a resource.
  • Access level: the access level of each operation. The levels are read, write, and list.
  • Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
    • For mandatory resource types, indicate with a prefix of * .
    • If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
  • Condition Key: the condition key that is defined by the cloud service.
  • Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
Operation Access level Resource type Condition key Associated operation
rds:CreateDBNodes create
*DBInstance
acs:rds:{#regionId}:{#accountId}:dbinstance/{#dbinstanceId}
  • rds:ResourceTag
none

Request parameters

Parameter Type Required Description Example
ClientToken string No

The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests.

The token can contain only ASCII characters and cannot exceed 64 characters in length.

ETnLKlblzczshOTUbOCz****
DBInstanceId string Yes

The instance ID You can call the DescribeDBInstances operation to query the instance ID.

rm-2ze450g4ctg6t****
DBNode array<object> Yes

The details of the node.

object Yes

The details of the node.

classCode string Yes

The specification information of the node.

mysql.n2.medium.xc
zoneId string Yes

The ID of the zone in which the node is deployed.

cn-zhangjiakou-a
vswitchId string No

The vSwitch ID of the node.

vsw-bp1sxxsodv28ey5dl****
ResourceGroupId string No

The resource group ID. You can call the DescribeDBInstanceAttribute operation to query the resource group ID.

rg-acfmy*****

Response parameters

Parameter Type Description Example
object

The response parameters.

RequestId string

The ID of the request.

7A41C147-C8D0-4DAE-A1A2-17EBCD60DFA1
DBInstanceId string

The ID of the instance.

rm-2ze450g4ctg6t****
OrderId long

The ID of the order.

2133400000*****
NodeIds string

The ID of the created node. The value is a string. Multiple values are separated by commas (,).

rn-abcd2*****

Examples

Sample success responses

JSONformat

{
  "RequestId": "7A41C147-C8D0-4DAE-A1A2-17EBCD60DFA1",
  "DBInstanceId": "rm-2ze450g4ctg6t****",
  "OrderId": 0,
  "NodeIds": "rn-abcd2*****"
}

Error codes

HTTP status code Error code Error message Description
400 DBNodeFormatFault The specified parameter DBNode is malformed The specified dbNode parameter is invalid.
400 DBNodeParameterRequired The specified parameter DBNode is required. You must specify the dbNode parameter.
400 DBNodeParameterTooManyItems The specified parameter DBNode has too many items. An excessive number of nodes are added for dbNode.
400 DBNodeParameter.InvalidClassCode The ClassCode of the item of the specified parameter DBNode is inconsistent. The ClassCode configuration is invalid for the DBNode parameter.
400 DBNodeParameter.InvalidValue The specific param DBNode is not valid. -
400 DBNodeParameter.NotFound The specified parameter DBNode is not valid. -
400 InvalidMultiTenant Multi tenants cannot exist in a same instance. -
400 InvalidClassCode The specification code in the parameter is invalid. The specification code in the parameter is invalid.
400 Order.ComboInstanceNotAllowOperate A package instance is not allowed to operate independently. A package instance is not allowed to operate independently.
400 Price.PricingPlanResultNotFound Pricing plan price result not found. Pricing plan price result not found.
400 Order.NoRealNameAuthentication You have not passed the real-name authentication and do not meet the purchase conditions. Please log in to the user center for real-name authentication. You have not passed the real-name authentication and do not meet the purchase conditions. Please log in to the cost and cost for real-name authentication.
400 InsufficientAvailableQuota Your account quota limit is less than 0, please recharge before trying to purchase. Your account available limit is less than 0, please recharge before trying to purchase.
400 CommodityServiceCalling.Exception Failed to call commodity service. Failed to call commodity service return.
400 RegionDissolvedEOM Dear customer, Alibaba Cloud plans to optimize and adjust the current region. Cloud services in this region will cease operations. You are currently unable to operate new purchase orders. Thank you for your understanding and support. Hello, Alibaba Cloud plans to optimize and adjust the current region. Cloud services in this region will stop operating. In order to ensure your business continuity and smooth transition of data migration, you are currently unable to operate new purchase orders. Thank you for your understanding and support.
400 Commodity.InvalidComponent The module you purchased is not legal, please buy it again. The module you purchased is not legal, please buy it again.
400 RegionEndTimeDissolvedIndia Cloud services in the India (Mumbai) region will be discontinued. Set the validity date to July 15, 2024 or earlier than July 15, 2024. Hello customer, this area has been abolished.
400 RegionEndTimeDissolvedAustralia Cloud services in the Australia (Sydney) region will be discontinued. Set the validity date to September 30, 2024 or earlier than September 30, 2024. Hello customer, this area has been abolished.
400 Price.CommoditySys Commodity system call exception. Commodity system call exception.
400 Pay.InsufficientBalance Insufficient available balance. Insufficient available balance.
400 Order.PeriodInvalid There is a problem with the period you selected, please choose again. There is a problem with the period you selected, please choose again.
400 pay.noCreditCard Account not bound to credit card. -
400 Order.InstHasUnpaidOrder There is an unpaid order for the service you have purchased. Please pay or void it before placing the order. There is an unpaid order for the service you have purchased. Please pay or void it before placing the order.
400 noAvailablePaymentMethod No payment method is specified for your account. We recommend that you add a payment method. No payment method has been specified for your account. We recommend that you add a payment method.
400 BasicInfoUncompleted Your information is incomplete. Complete your information before the operation. Your basic information is not complete, please complete your basic information before operation.
400 Risk.RiskControlRejection Your account is abnormal, please contact customer service for details. Your account is abnormal, please contact customer service for details.
400 BasicInfoUncompleted Your information is incomplete, Complete your information before the operation. -
400 System.SaleValidateFailed Sales expression validation system error. A system error occurs when the sales expression is verified.
400 ContainForbiddenLabelError There is a label that prohibits placing orders. Please contact your distributor for assistance. You cannot place the order because a tag indicates that order placement is prohibited. Contact your distributor.
403 GroupReplicationNotSupport.InvalidEngineVersion Group Replication requires the instance engine version to be 8.0. -
403 GroupReplicationNotSupport.InvalidNodeClassCode Group Replication requires the ClassCode of each node to be consistent. -
403 GroupReplicationNotSupport.InvalidNodeNum Group Replication is not supported, the number of nodes must be an odd number greater than or equal to 3. -
403 GroupReplicationNotSupport.InvalidXengine Group Replication is not supported because the instance has xengine tables. -
403 GroupReplicationNotSupport.MemoryTooSmall Group Replication is not supported because the memory is too small. -
403 OperationDenied.DBType The operation is not permitted due to type of the database. The operation is not supported for the database engine of the RDS instance.
403 OrderStatus.UnPaid The specified db instance has unpaid order. The instance has an unpaid order. Please pay first and try again.

For a list of error codes, visit the Service error codes.

Change history

Change time Summary of changes Operation
2025-03-31 The Error code has changed View Change Details
2024-04-23 The Error code has changed View Change Details
2024-03-22 The Error code has changed View Change Details
2023-11-23 The Error code has changed View Change Details
2023-11-07 The Error code has changed View Change Details
2023-10-20 The Error code has changed View Change Details
2023-10-20 The Error code has changed View Change Details
2023-09-08 The Error code has changed View Change Details
2023-07-24 The Error code has changed View Change Details
2023-06-27 The Error code has changed. The request parameters of the API has changed View Change Details
2023-03-22 The Error code has changed. The response structure of the API has changed View Change Details