ModifyDBNodeClass - PolarDB - Alibaba Cloud Documentation Center

Changes the node specifications of a PolarDB cluster.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Debug

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:
- The required resource types are displayed in bold characters.
- 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
polardb:ModifyDBNodeClass	Write	All Resources *	none	none

Request parameters

Parameter	Type	Required	Description	Example
DBClusterId	string	Yes	The ID of the cluster.	pc-*************
ModifyType	string	Yes	The type of the configuration change. Valid values: Upgrade Downgrade	Upgrade
DBNodeTargetClass	string	Yes	The specifications of all nodes. For more information, see Specifications of computing nodes.	polar.mysql.x4.large
ClientToken	string	No	The client token that is used to ensure the idempotence of the request. You can use the client to generate the value, but you must ensure that it is unique among different requests. The token can only contain ASCII characters and cannot exceed 64 characters in length. The token is case-sensitive.	6000170000591aed949d0f54a343f1a4233c1e7d1c5c******
PlannedStartTime	string	No	The earliest start time to upgrade the specifications within the scheduled time period. Specify the time in the ISO 8601 standard in the `YYYY-MM-DDThh:mm:ssZ` format. The time must be in UTC. Note This parameter takes effect only when `ModifyType` is set to `Upgrade`. The earliest start time of the task can be a point in time within the next 24 hours. For example, if the current time is `2021-01-14T09:00:00Z`, you can specify a point in the time that ranges from `2021-01-14T09:00:00Z` to `2021-01-15T09:00:00Z`. If this parameter is left empty, the upgrade task is immediately performed.	2021-01-14T09:00:00Z
PlannedEndTime	string	No	The latest start time to upgrade the specifications within the scheduled time period. Specify the time in the ISO 8601 standard in the `YYYY-MM-DDThh:mm:ssZ` format. The time must be in UTC. Note The value of this parameter must be at least 30 minutes later than the value of PlannedStartTime. By default, if you specify `PlannedStartTime` but do not specify PlannedEndTime, the latest start time of the task is set to `Value of PlannedEndTime + 30 minutes`. For example, if you set `PlannedStartTime` to `2021-01-14T09:00:00Z` and you do not specify PlannedEndTime, the latest start time of the task is `2021-01-14T09:30:00Z`.	2021-01-14T09:30:00Z
SubCategory	string	No	The category of the cluster. Valid values: normal_exclusive: dedicated. normal_general: genera-purpose.	normal_general
DBNodeType	string	No	The type of the node. Valid values: RO STANDBY DLNode	DLNode

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The request ID.	685F028C-4FCD-407D-A559-072D63******
DBClusterId	string	The cluster ID.	pc-*************
OrderId	string	The order ID.	2035629******

Examples

Sample success responses

JSONformat

{
  "RequestId": "685F028C-4FCD-407D-A559-072D63******",
  "DBClusterId": "pc-*************",
  "OrderId": "2035629******"
}

Error codes

HTTP status code	Error code	Error message	Description
400	ORDER.ARREARAGE		You must settle the overdue payments for your account before you can make a purchase.
400	InsufficientResourceCapacity	The resource is insufficient.	Insufficient resources.
400	InvalidModifyType.Malformed	The specified parameter ModifyType is not valid.	The specified ModifyType parameter is invalid.
403	OperationDenied.RoEqualSpec	must exist at least ro class equal with rw	The number of read-only nodes must be equal to or greater than that of primary nodes.
403	OperationDenied.DBClusterStatus	The operation is not permitted due to status of cluster.	The PolarDB cluster does not support this operation in the current state.

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

Change history

Change time

Summary of changes

Operation

2023-09-13

The Error code has changed

see changesets

Change item	Change content
Error Codes	The Error code has changed.
	Error Codes 400 change
	delete Error Codes: 403

2023-09-12

The Error code has changed. The request parameters of the API has changed

see changesets

Change item	Change content
Error Codes	The Error code has changed.
	delete Error Codes: 400
	delete Error Codes: 403
Input Parameters	The request parameters of the API has changed.
	Added Input Parameters: DBNodeType

2023-06-12

The Error code has changed

see changesets

Change item	Change content
Error Codes	The Error code has changed.
	Error Codes 403 change
	Added Error Codes: 400