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Reviewed-by: Gladkov, Maksim <mgladkov@noreply.gitea.eco.tsi-dev.otc-service.com>
Co-authored-by: wangdengke2 <wangdengke2@huawei.com>
Co-committed-by: wangdengke2 <wangdengke2@huawei.com>

2026-03-03 12:01:43 +00:00

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Querying Nodes of a DDM Instance (a V1 API)

Function

This API is used to query nodes of a DDM instance.

Constraints

None

URI

GET /v1/{project_id}/instances/{instance_id}/nodes?offset={offset}&limit={limit}

**Table 1** Path parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID of a tenant in a region
instance_id	Yes	String	DDM instance ID

**Table 2** Query parameters
Parameter	Mandatory	Type	Description
offset	No	Integer	Index offset. The query starts from the next piece of data indexed by this parameter. The value is 0 by default. The value must be a number but cannot be a negative number.
limit	No	Integer	Maximum records to be queried. Value range: 1 to 128 If the parameter value is not specified, 128 records are queried by default.

Request Parameters

**Table 3** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling an IAM API. The value of X-Subject-Token in the response header is the user token.

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
nodes	Array of NodeList objects	Instance node information
offset	Integer	Which page the server starts returning items
limit	Integer	Number of records displayed on each page
total	Integer	Number of DDM instance nodes

**Table 5** NodeList
Parameter	Type	Description
port	String	Port
status	String	Node status For details, see Status Description.
node_id	String	Node ID
ip	String	IP address of a DDM instance node
group_id	String	ID of the group that the node belongs to

Status code: 400

**Table 6** Response body parameters
Parameter	Type	Description
errCode	String	Service error code
externalMessage	String	Error message

Status code: 500

**Table 7** Response body parameters
Parameter	Type	Description
errCode	String	Service error code
externalMessage	String	Error message

Example Request

GET https://ddm.eu-de.otc.t-systems.com/v1/619d3e78f61b4be68bc5aa0b59edcf7b/instances/1f5c9fd6cd984056ba89c8c87cc03278in09/nodes?offset=0&limit=1

Example Response

Status code: 200

{
  "nodes" : [ {
    "port" : "5066",
    "status" : "normal",
    "node_id" : "4a2b97b7f5e3462c9c78aae93b46ed83no09",
    "ip" : "192.168.0.160",
    "group_id": "9fd13885d3354f1f8df256ecda6d3346gr09"
  } ],
  "offset" : 0,
  "limit" : 128,
  "total" : 1
}

Status code: 400

bad request

{
  "externalMessage" : "Parameter error.",
  "errCode" : "DBS.280001"
}

Status code: 500

server error

{
  "externalMessage" : "Server failure.",
  "errCode" : "DBS.200412"
}

Status Codes

Status Code	Description
200	OK
400	bad request
500	server error

Error Codes

For details, see Error Codes.

Parent topic: DDM Instances

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