Query a list of instance nodes with DescribeDBClusterNode - AnalyticDB - Alibaba Cloud - AnalyticDB

Operation description

You can call this operation to query the information about coordinator and compute nodes in an AnalyticDB for PostgreSQL instance in elastic storage mode or Serverless mode.

Limits

You can call this operation up to 1,000 times per second per account. If the number of the calls per second exceeds the limit, throttling is triggered. As a result, your business may be affected. We recommend that you take note of the limit when you call this operation.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

gpdb:DescribeDBClusterNode

get

*DBInstance

acs:gpdb:*:{#accountId}:dbinstance/{#DBInstanceId}

None

Request parameters

Parameter	Type	Required	Description	Example
DBInstanceId	string	Yes	The instance ID. Note You can call the DescribeDBInstances operation to query details about all AnalyticDB for PostgreSQL instances within a region, including instance IDs.	gp-bp***************
NodeType	string	No	The node type. Valid values: master: coordinator node. segment: compute node. Note If you do not specify this parameter, the information about all nodes is returned.	master

Response elements

Element	Type	Description	Example
	object
Nodes	array<object>	The name of the node.
	object
Name	string	The name of the node.	master-10*******
RequestId	string	The request ID.	87E44B48-B306-4AD3-A63B-C8**********
DBClusterId	string	The instance ID.	gp-bp***************

Examples

Success response

JSON format

{
  "Nodes": [
    {
      "Name": "master-10*******"
    }
  ],
  "RequestId": "87E44B48-B306-4AD3-A63B-C8**********",
  "DBClusterId": "gp-bp***************"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.