DeleteDBNodes - PolarDB - Alibaba Cloud Documentation Center

Deletes a read-only node from 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:DeleteDBNodes	delete	dbcluster acs:polardb:{#regionId}:{#accountId}:dbcluster/{#dbclusterId}	none	none

Request parameters

Parameter	Type	Required	Description	Example
DBClusterId	string	Yes	The ID of the cluster.	pc-**************
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.	6000170000591aed949d0f54a343f1a42***********
DBNodeType	string	No	The type of the node. Valid values: RO STANDBY Enumeration Value: DLNode: ai node. STANDBY: standby node. RO: read-only node.	RO
DBNodeId	array	Yes	The IDs of the nodes. Note You can call the DescribeDBClusters operation to query the details of all clusters that belong to your Alibaba Cloud account, such as the cluster ID.
	string	Yes	The ID of the node. N is a positive integer that starts from 1. The maximum value of N is the number of current nodes minus 2. Each cluster must contain at least one primary node and one read-only node. Note You can delete multiple read-only nodes at the same time only in PolarDB for MySQL clusters	pi-****************

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The ID of the request.	6566B2E6-3157-4B57-A693-AFB751******
DBClusterId	string	The ID of the cluster.	pc-**************
OrderId	string	The ID of the order.	2035638*******

Examples

Sample success responses

JSONformat

{
  "RequestId": "6566B2E6-3157-4B57-A693-AFB751******",
  "DBClusterId": "pc-**************",
  "OrderId": "2035638*******"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidDBNodeNum.Malformed	The number of parameter DBNode.N is not valid.	The specified number of database nodes is invalid.
400	OperationDenied.DeleteDBNodesWithStrictConsistencyOn	3AZ cluster does not allow delete db nodes.	Nodes cannot be deleted for multi-zone clusters.
400	InvalidDBNode.Malformed	The specified parameter DBNode.N is not valid.	The specified DBNode.N parameter is invalid.
403	OperationDenied.DBNodeRole	The operation is not permitted due to the role of node.	This operation is not supported by the node role.
404	InvalidDBClusterId.NotFound	The DBClusterId provided does not exist in our records.	The specified DBClusterId parameter does not exist in the current record.
404	InvalidDBClusterId.Malformed	The specified parameter DBClusterId is not valid.	The specified DBClusterId parameter is invalid.

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

Change history

Change time	Summary of changes	Operation
2023-09-12	The Error code has changed	View Change Details
2023-06-20	The Error code has changed. The request parameters of the API has changed	View Change Details