Querying Available DB Instances

API Description

This API is used to query DB instances to which a specified parameter template can be applied.

URI

URI format
GET https://{Endpoint}/v3/{project_id}/configurations/{config_id}/applicable-instances
URI example
https://dds.ap-southeast-1.myhuaweicloud.com/v3/056538411200d4cd2f79c003c7606412/configurations/7a8d539ba30f43adaf1b16d08b1df4bdpr02/applicable-instances

**Table 1** Request parameters
Name	Type	IN	Mandatory	Description
X-Auth-Token	string	header	Yes	User token obtained from IAM. For details, see Authentication.
project_id	string	path	Yes	Project ID of a tenant in a region. Obtain the project ID by following the instructions in Obtaining a Project ID.

**Table 2** Path parameters
Name	Mandatory	Type	Description
config_id	Yes	String	Parameter template ID.

**Table 3** Query parameters
Name	Mandatory	Type	Description
offset	No	Integer	Index offset. If offset is set to N, the resource query starts from the N+1 piece of data. The default value is 0, indicating that the query starts from the first piece of data. The value must be a positive integer.
limit	No	Integer	Number of records to be queried. The default value is 100. The value must be a positive integer. The minimum value is 1 and the maximum value is 100.

Requests

None

Responses

Parameter description

**Table 4** Response body parameters
Name	Type	Description
instances	Array of Table 5-5 objects	List of instances to which the parameter template can be applied.

**Table 5** ApplicableInstancesInfo
Name	Type	Description
instance_id	String	DB instance ID.
instance_name	String	DB instance name.
entities	Array of Table 6-6 objects	List of node group information or node information. For a replica set instance or single node instance, this parameter is not returned and the parameter template is directly applied to the corresponding DB instance. For the shard or config group of a cluster instance, information about the node group of the corresponding instance is returned. For the mongos group of a cluster instance, information about the node of the corresponding instance is returned. For example, a parameter template of the mongos node can be applied to one or more mongos nodes.

**Table 6** EntityInfo
Name	Type	Description
entity_id	String	Group ID or node ID.
entity_name	String	Group name or node name.

Example response

{  
  instances:[ 
    { 
      "instance_id": "1967d9d9d6ef4c5ea38bd5a754f5737ein02", 
      "instance_name": "dds-5425", 
      "entities": [ 
        { 
          "entity_id": "36457a9af7c7486a882727d205ef37afgr02", 
          "entity_name": "shard_1" 
        }, 
        { 
          "entity_id": "a36651f1807f40be891db839e8bbe9e7gr02", 
          "entity_name": "shard_2" 
        } 
      ] 
    }, 
    { 
      "instance_id": "4809355b9836467c8749610089b1ef3bin02", 
      "instance_name": "dds-9d67", 
      "entities": [ 
        { 
          "entity_id": "08e61e50220c49728eb49dbb092d6ec4gr02", 
          "entity_name": "shard_2" 
        }, 
        { 
          "entity_id": "24d58cd41c20486e9745e7f5b424e641gr02", 
          "entity_name": "shard_3" 
        }, 
        { 
          "entity_id": "602807fcb2b24e38952347e030ec4a61gr02", 
          "entity_name": "shard_1" 
        } 
      ] 
    } 
  ] 
}

SDK

Click Document Database Service DDS SDK to download the SDK or view the SDK document. To learn how to install and authenticate an SDK, read the Usage section.