Help Center/ Distributed Database Middleware/ API Reference/ APIs (Recommended)/ DDM Instances/ Querying DDM Instances
Updated on 2026-06-05 GMT+08:00
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Querying DDM Instances

Function

This API is used to query DDM instances.

Constraints

None

URI

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

Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID of a tenant in a region

To obtain this value, see Obtaining a Project 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 instances to be queried.

Value range: 1 to 128.

If the parameter value is not specified, 10 instances are queried by default.

Request Parameters

Table 3 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token.

You can obtain the token by calling the IAM API used to obtain a user token.

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

instances

Array of ShowInstanceBeanResponse objects

DDM instance information

instance_num

Integer

Number of DDM instances of a tenant

page_no

Integer

Current page

page_size

Integer

Data records on the current page

total_record

Integer

Total records

total_page

Integer

Total pages
Table 5 ShowInstanceBeanResponse

Parameter

Type

Description

id

String

DDM instance ID

status

String

DDM instance status. For details about this parameter value, see Status Description.

name

String

Name of the created DDM instance

created

String

Time when the DDM instance is created. The time must be in the format of yyyy-mm-dd Thh:mm:ssZ.

T indicates the separator between the calendar and the hourly notation of time. Z indicates Coordinated Universal Time (UTC).

updated

String

Time when the DDM instance is last updated, which is in the same format as created.

available_zone

String

AZ name

vpc_id

String

VPC ID

subnet_id

String

Subnet ID

security_group_id

String

Security group ID

node_count

Integer

Number of nodes

access_ip

String

Address for accessing the DDM instance

access_port

String

Port for accessing the DDM instance

core_count

String

Number of vCPUs

ram_capacity

String

Memory size in GB

error_msg

String

Response message. This parameter is not returned if no abnormality occurs.

node_status

String

Node status

enterprise_project_id

String

Enterprise project ID

project_id

String

Project ID of a tenant in a region

engine_version

String

Engine version

order_id

String

Order ID, which is returned if the DDM instance is billed on a yearly/monthly basis

enable_ssl

Boolean

Whether SSL is enabled. The value can be:

  • true: SSL is enabled for the instance.
  • false: SSL is disabled for the instance.

flavor_ref

String

Specification code
Table 6 ProjectTag

Parameter

Type

Description

key

String

Tag key.

value

String

Tag value

Status code: 400

Table 7 Response body parameters

Parameter

Type

Description

errCode

String

Service error code

externalMessage

String

Error message

Status code: 500

Table 8 Response body parameters

Parameter

Type

Description

errCode

String

Service error code

externalMessage

String

Error message

Example Request

Querying DDM instances

GET https://{endpoint}/v1/{project_id}/instances?offset={offset}&limit={limit}

Example Response

Status code: 200

OK

{
  "instance_num" : 26,
  "instances" : [ {
    "id" : "73f27bb0b26d4a79a9b0c58a4c700c4fin09",
    "status" : "RUNNING",
    "name" : "ddm-36c7",
    "created" : "2021-12-14T07:46:22+0000",
    "updated" : "2021-12-14T10:11:22+0000",
    "available_zone" : "az1",
    "vpc_id" : "1d9441c5-1a4b-431d-9edb-bf3564a83e74",
    "subnet_id" : "20c2d83c-755b-42a2-846a-4688eb35d1a7",
    "security_group_id" : "fbdff89d-32fe-45a4-832b-115ac4bfaac9",
    "node_count" : 1,
    "access_ip" : "192.168.23.143",
    "access_port" : "5066",
    "core_count" : "2",
    "ram_capacity" : "4",
    "node_status" : "RUNNING",
    "enterprise_project_id" : "0",
    "project_id" : "055d9f4ee780d4d42f96c01c1bc3c50c",
    "engine_version" : "3.0.8",
    "enable_ssl" : false,
    "flavor_ref" : "ddm.c6.large.2"
   
     
      
   
  } ],
  "page_size" : 1,
  "total_record" : 26,
  "total_page" : 26,
  "page_no" : 3
}

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