---
title: "updateAutoScalingGroup"
slug: "compute-vautoscaling-autoscalinggroup-updateautoscalinggroup"
updated: 2026-09-17T10:05:57Z
published: 2026-09-17T10:05:57Z
canonical: "api.ncloud-docs.com/compute-vautoscaling-autoscalinggroup-updateautoscalinggroup"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# updateAutoScalingGroup

Available in VPC

Edit the details of an Auto Scaling Group and the launch configuration set for it.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| GET \| POST | /vautoscaling/v2/updateAutoScalingGroup |

              Note

              

This guide is based on the GET method. POST method call tests can be performed through Swagger in the API Gateway service of the NAVER Cloud Platform console.

### Request headers

For information about the headers common to all Auto Scaling APIs, see [Auto Scaling request headers](/docs/en/compute-vautoscaling#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `regionCode` | String | Optional | Region code - See [getRegionList](/docs/en/compute-vserver-server-common-getregionlist). - First Region in the query results (default). |
| `autoScalingGroupNo` | String | Required | Auto Scaling Group number - See [getAutoScalingGroupList](/docs/en/compute-vautoscaling-autoscalinggroup-getautoscalinggrouplist). |
| `launchConfigurationNo` | String | Optional | Launch configuration number - See [getLaunchConfigurationList](/docs/en/compute-vautoscaling-launchconfiguration-getlaunchconfigurationlist). |
| `serverNamePrefix` | String | Optional | Server name prefix - Enter 3-7 characters using a combination of lowercase English letters, numbers, and special character "-". - The string must start with a lowercase English letter and end with a lowercase English letter or a number. - Server name rule is {Prefix}-{English letter\|number}, with everything but the prefix generated automatically. |
| `minSize` | Integer | Required | Minimum capacity: Minimum number of servers in Auto Scaling Group - 0-30 - Set to `maxSize` or less. - Enter 0 to not have a server. |
| `maxSize` | Integer | Required | Maximum capacity: Maximum number of servers in Auto Scaling Group - 0-30 - Set to `minSize` or more |
| `desiredCapacity` | Integer | Optional | Expected capacity: Expected number of servers in Auto Scaling Group - Set between `minSize` and `maxSize` (default: same as `minSize`). - Automatically adjust the number of servers based on the input value. |
| `defaultCoolDown` | Integer | Optional | Default cooldown value (second) - 0-2147483647 (default: 300) - Monitoring wait time for server readiness after scaling |
| `healthCheckGracePeriod` | Integer | Conditional | Health check grace period (second) - 0-2147483647 (default: 300) - The amount of time that a server is not judged unhealthy if it fails a health check, given the initial workload of the server - Required if `healthCheckTypeCode` is `LOADB` |
| `healthCheckTypeCode` | String | Optional | Health check type code - `SVR` (default) \| `LOADB` - `SVR`: Server - `LOADB`: Load balancer - For `LOADB`, `healthCheckGracePeriod` is required. |
| `responseFormatType` | String | Optional | Format of the response data - `xml` (default) \| `json` |

              Note

              

When entering a request query parameter, see the following:

- Only the information corresponding to the request query parameters you entered is edited; information for request query parameters you didn't enter retains its existing value.
- Existing values are displayed in response results when request query parameters with a required status of Optional are not entered (200 OK).
- The case relationship of `minSize` ≤ `desiredCapacity` ≤ `maxSize` remains valid even if `minSize`, `maxSize`, and `desiredCapacity` change.
- New launch configurations created by the updateAutoScalingGroup API call are reflected from the server instance (VM) created afterward.
- The call fails when requesting changes to an Auto Scaling Group that is in the process of being scaled.

### Request example

The request example is as follows:

```
curl --location --request GET 'https://ncloud.apigw.ntruss.com/vautoscaling/v2/updateAutoScalingGroup
?regionCode=KR
&autoScalingGroupNo=1***9
&maxSize=3
&desiredCapacity=0
&defaultCoolDown=600
&healthCheckGracePeriod=300
&healthCheckTypeCode=LOADB
&responseFormatType=json' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `updateAutoScalingGroupResponse` | Object | - | Response result - See [AutoScalingGroupList](/docs/en/common-vapidatatype-autoscalinggrouplist). |
| `updateAutoScalingGroupResponse.requestId` | String | - | ID for the request - UUID format |
| `updateAutoScalingGroupResponse.returnCode` | String | - | Response code |
| `updateAutoScalingGroupResponse.returnMessage` | String | - | Response message |

### Response status codes

For information about the HTTP status codes common to all Auto Scaling APIs, see [Auto Scaling response status codes](/docs/en/compute-vautoscaling#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "updateAutoScalingGroupResponse": {
        "totalRows": 1,
        "autoScalingGroupList": [
            {
                "vpcNo": "4**5",
                "subnetNo": "3***4",
                "serverNamePrefix": "",
                "autoScalingGroupNo": "1***9",
                "autoScalingGroupName": "asg",
                "launchConfigurationNo": "5891",
                "minSize": 0,
                "maxSize": 3,
                "desiredCapacity": 0,
                "defaultCoolDown": 600,
                "healthCheckGracePeriod": 300,
                "healthCheckType": {
                    "code": "LOADB",
                    "codeName": "Load Balancer"
                },
                "createDate": "2025-05-15T09:50:55+0900",
                "autoScalingGroupStatus": {
                    "code": "CREAT",
                    "codeName": "Created"
                },
                "targetGroupNoList": [],
                "inAutoScalingGroupServerInstanceList": [],
                "accessControlGroupNoList": [
                    "1***1"
                ],
                "suspendedProcessList": []
            }
        ],
        "requestId": "a8eb0d25-****-****-****-0b05a6829fb9",
        "returnCode": "0",
        "returnMessage": "success"
    }
}
```