Last updated: 2021-05-19 14:51:58

1. API Description

Domain name for API request:

This API is used to query the information of instance nodes.

A maximum of 20 requests can be initiated per second for this API.

Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

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2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

Parameter Name Required Type Description
Action Yes String Common parameter. The value used for this API: DescribeDCDBInstanceNodeInfo.
Version Yes String Common parameter. The value used for this API: 2018-04-11.
Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
InstanceId Yes String Instance ID
Limit No Integer The maximum number of results returned at a time. Value range: (0-100]. Default value: 100.
Offset No Integer Offset of the returned results. Default value: 0.

3. Output Parameters

Parameter Name Type Description
TotalCount Integer Total number of nodes
NodesInfo Array of BriefNodeInfo Node information
RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

4. Example

Example1 Querying the information of instance nodes

Input Example

Content-Type: application/json
X-TC-Action: DescribeDCDBInstanceNodeInfo
<Common request parameters>

    "InstanceId": "tdsqlshard-8upuqubt"

Output Example

  "Response": {
    "NodesInfo": [
        "NodeId": "b991a3d602da35cf7bf64dcafcd5f7ad589aa6d9",
        "Role": "master",
        "ShardId": "shard-he2hj3al"
        "NodeId": "9a498278e1775355cac16c23d65c59204aec52f1",
        "Role": "slave",
        "ShardId": "shard-he2hj3al"
        "NodeId": "3c698ab9547674e361bae013439225356175668d",
        "Role": "master",
        "ShardId": "shard-mgsnag2z"
        "NodeId": "2f0714ded5eaef1dd927fdc1429350470ce0017b",
        "Role": "slave",
        "ShardId": "shard-mgsnag2z"
    "RequestId": "6b8b1984-c226-46d9-ac0a-81e241cf7cdc",
    "TotalCount": 4

5. Developer Resources


TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

Command Line Interface

6. Error Code

The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

Error Code Description
FailedOperation.OssOperationFailed Failed to request the backend API.
InternalError.InnerSystemError Internal system error.
InternalError.OperateDatabaseFailed Database operation failed.
InvalidParameter.InstanceNotFound Failed to find the requested instance.