ModifyDBNodesClass - PolarDB - Alibaba Cloud Documentation Center

Changes the specifications of a node in a PolarDB cluster.

Debugging

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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:ModifyDBNodesClass	update	DBCluster acs:polardb:{#regionId}:{#accountId}:{#resource-type}/{#resource-id}	none	none

Request parameters

Parameter	Type	Required	Description	Example
DBClusterId	string	Yes	The cluster ID.	pc-*************
ModifyType	string	Yes	The type of the configuration change. Valid values: Upgrade Downgrade	Upgrade
DBNode	array<object>	Yes	The details of the nodes.
	object	Yes
DBNodeId	string	No	The ID of the node. Note If you specify this parameter, DBNode.N.TargetClass is required. N is an integer that starts from 1. The maximum value of N is calculated by using the following formula:16 - The number of current nodes.	pi-*************
TargetClass	string	No	The specifications of the node that you want to change. For more information, see Specifications of compute nodes. Note If you specify this parameter, DBNode.N.DBNodeId is required. N is an integer that starts from 1. The maximum value of N is calculated by using the following formula:16 - The number of current nodes.	polar.mysql.x4.medium
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 make sure that it is unique among different requests. The token can contain only 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

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 ID of the order.	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	InvalidModifyType.Malformed	The specified parameter ModifyType is not valid.	The specified ModifyType parameter is invalid.

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

Change history

Change time	Summary of changes	Operation
2024-08-29	The Error code has changed. The request parameters of the API has changed	View Change Details
2023-09-12	The Error code has changed	View Change Details
2022-04-21	Add Operation	View Change Details