Last updated: 2019-07-16 18:55:07

1. API Description

API request domain name:

This API (ModifyLaunchConfigurationAttributes) modifies one or more attributes for the specified launch configuration.

  • The changes of launch configuration do not affect the existing instances. New instances will be created based on the modified configuration.
  • This API supports modifying certain simple types of launch configuration.

Default API request frequency limit: 20 times/second.

Note: Because financial availability zones and non-financial availability zones are isolated. When specifying a financial availability zone (e.g., ap-shanghai-fsi) in the Region (a common parameter), you should also choose the financial availability zone preferably in the same region as that one specified in Region for the domain, such as

2. Input Parameters

The following list of request parameters lists only the API request parameters and some common parameters. For the complete list of common parameters, see Common Request Parameters.

Parameter name Required Type Description
Action Yes String Common parameter; the name of this API: ModifyLaunchConfigurationAttributes
Version Yes String Common parameter; the version of this API: 2018-04-19
Region Yes String Common parameters; for details, see the Region List.
LaunchConfigurationId Yes String Launch configuration ID
ImageId No String Specify a valid image ID in the format of img-8toqc6s3. There are four types of images:
  • Public image
  • Custom image
  • Shared image
  • Service Market image

  • The ID of an available image can be obtained in the following ways:
  • Query the ID of a public image, custom image, or shared image in the console; query the ID of a Service Market image in the Service Market.
  • Get the ImageId field in the return message after calling the DescribeImages API.
  • InstanceTypes.N No Array of String List of instance types. Different instance models specify different resource specifications. Up to 5 instance models can be supported.
    Types of launch configurations. InstanceType: one single instance type; InstanceTypes: multiple instance types. After InstanceTypes is successfully specified for the launch configuration, the original InstanceType will be automatically invalidated.
    InstanceTypesCheckPolicy No String Instance type verification policy which works when InstanceTypes is actually modified; valid values: ALL, ANY; ANY by default.

  • ALL: The verification will success only if all instance types (InstanceType) are available; otherwise, an error will be returned.

  • ANY: The verification will success if any instance type (InstanceType) is available; otherwise, an error will be returned.

    Common reasons why an instance type is unavailable include running out of the instance type or the corresponding cloud disk.
    If a model in InstanceTypes does not exist or has been discontinued, a verification error will be returned regardless of the value of InstanceTypesCheckPolicy.
  • LaunchConfigurationName No String Name of the launch configuration. The name can be up to 60 bytes in size and contain Chinese characters, letters, numbers, underscores, separators ("-"), and decimal points.
    UserData No String Base64-encoded custom data. Maximum 16 KB. If you want to clear UserData, specify it as an empty string

    3. Output Parameters

    Parameter name Type Description
    RequestId String The ID of the request. Each request returns a unique ID. The RequestId is required to troubleshoot issues

    4. Sample

    Modifying the Image, Instance Type and Name of the Specified Launch Configuration

    Input Sample Code
    &<Common request parameter>

    Output Sample Code

        "Response": {
            "RequestId": "07022dcb-5bba-48f0-a2b0-800ad006d031"

    Clearing UserData

    Input Sample Code
    &<Common request parameter>

    Output Sample Code

        "Response": {
            "RequestId": "2c027f22-3a3b-489a-a77a-89c53fc15212"

    5. Developer Resources

    API Explorer

    This tool provides various capabilities such as online call, signature verification, SDK code generation, and quick API retrieval that significantly reduce the difficulty of using TencentCloud API.


    TencentCloud API 3.0 integrates software development toolkits (SDKs) that support various programming languages to make it easier for you to call the APIs.


    6. Error Codes

    The following error codes are API business logic-related. For other error codes, see Common Error Codes.

    Error Code Description
    AccountQualificationRestrictions The requesting account failed to pass the qualification review.
    CallCvmError CVM API call failed.
    InvalidImageId.NotFound The image was not found.
    InvalidLaunchConfiguration.NameDuplicate The launch configuration name already exists.
    InvalidParameterValue.CvmConfigurationError Exception with CVM parameter validation.