This API is used to change a parameter template for a specified DB instance.

URI format
PUT https://{Endpoint}/v3/{project_id}/configurations/{config_id}/apply

**Table 1** Request parameters
Name	Type	Mandatory	Description
x-auth-token	String	Yes	User token.
project_id	String	Yes	Specifies the project ID of a tenant in a region.
config_id	String	Yes	Parameter template ID.

Parameter description

**Table 2** Request body parameters
Name	Mandatory	Type	Description
entity_ids	Yes	Array of strings	Instance IDs, group IDs, or node IDs. You can call the API used for querying instances and details to obtain the value. If you do not have an instance, you can call the API used for creating an instance. If the DB instance type is cluster and the shard or config parameter template is to be changed, the value is the group ID. If the parameter template of the mongos node is changed, the value is the node ID. If the DB instance to be changed is a replica set instance or a single node instance, the value is the instance ID.

Applying a parameter template whose entity_ids is 73ea2bf70c73497f89ee0ad4ee008aa2no02 to a specified DB instance

{
  "entity_ids": [
    "73ea2bf70c73497f89ee0ad4ee008aa2no02"
  ]
}

**Table 3** Response body parameters
Name	Type	Description
job_id	String	Indicates the ID of the asynchronous task for applying a parameter template.

Response example

{ 
  "job_id" : "bf26cf3c-d046-4080-bb45-f114be7afa5f" 
}

Status Code:200.

For more information, see Status Code.

For more information, see Error Code.

Applying a Parameter Template