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OpenSearch:CreateFunctionInstance

Last Updated:Aug 04, 2026

Creates an algorithm instance for a specified feature.

Operation description

Before calling this operation, call the GetFunctionCurrentVersion operation to obtain the latest version of the feature. The version describes the parameter lists createParameters and usageParameters required for creating an instance, as well as the parameter requirements.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

opensearch:WriteFunction

create

*FunctionInstance

acs:opensearch:{#regionId}:{#accountId}:apps/{#AppGroupId}

None None

Request syntax

POST /v4/openapi/app-groups/{appGroupIdentity}/functions/{functionName}/instances HTTP/1.1

Path Parameters

Parameter

Type

Required

Description

Example

appGroupIdentity

string

Yes

The body parameters.

my_app_group_name

functionName

string

Yes

The application name.

my_app_group_name

Request parameters

Parameter

Type

Required

Description

Example

No

The feature name. Valid values:

  • ctr: CTR model

  • pop: popularity model

  • category: category model

  • hot: hot word model

  • hint: hint model

  • suggest: drop-down suggestion model

  • analyzer: token model

  • termweight: term weighting model

  • synonym: synonym model

ctr

Example (ctr)

POST /v4/openapi/app-groups/my-app/functions/ctr/instances
{
    "instanceName": "my_ctr",
    "modelType": "tf_checkpoint",
    "functionType": "PAAS",
    "cron": "0 0 ? * 0,1,3,5",
    "description": "",
    "createParameters": [
        {
            "name": "id_field",
            "value": "id"
        },
        {
            "name": "title_field",
            "value": "title"
        }
    ],
    "usageParameters": []
}

Example (hot)

POST /v4/openapi/app-groups/my-app/functions/hot/instances
{
    "instanceName":"my_hot",
    "modelType":"offline_inference",
    "functionType":"PAAS",
    "createParameters":[
        {
            "name":"filter",
            "value":"biz_type != 1"
        }
    ],
    "usageParameters": [
        {
            "name":"allow_dict_id",
            "value":"123"
        },
        {
            "name":"deny_dict_id",
            "value":"456"
        }
    ],
    "cron":"12 4 ? * 1,2,3,4,5,6,0"
}

Response elements

Element

Type

Description

Example

object

The body parameters.

{ "status" : "OK", "requestId" : "", "httpCode": 200, "code": "", "message": "", "latency" : 123, "result" : { } }

status

string

httpCode

integer

requestId

string

message

string

code

string

latency

integer

Sample success response:

{
  "status" : "OK",
  "requestId" : "98724351-D6B2-5D8A-B089-7FFD1821A7E9",
  "httpCode": 200,
  "code": "",
  "message": "",
  "latency" : 123,
  "result" : {}
}

Examples

Success response

JSON format

{
  "status": "",
  "httpCode": 0,
  "requestId": "",
  "message": "",
  "code": "",
  "latency": 0
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.