Use ModifyLaunchTemplateDefaultVersion to change the default version of a launch template - Elastic Compute Service - Alibaba Cloud - Elastic Compute Service

Calls the ModifyLaunchTemplateDefaultVersion operation to switch the default version of a launch template by specifying the DefaultVersionNumber parameter. If you do not specify a template version number when you create an instance by calling the RunInstances operation, the default version is used.

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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

ecs:ModifyLaunchTemplateDefaultVersion

update

LaunchTemplate

acs:ecs:{#regionId}:{#accountId}:launchtemplate/{#launchtemplateId}

None

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID of the launch template. You can call the DescribeRegions operation to query the most recent region list.	cn-hangzhou
LaunchTemplateId	string	No	The ID of the launch template. You must specify LaunchTemplateId or LaunchTemplateName to determine the template.	lt-s-bp177juajht6****
LaunchTemplateName	string	No	The name of the launch template. You must specify LaunchTemplateId or LaunchTemplateName to determine the template.	testLaunchTemplateName
DefaultVersionNumber	integer	Yes	The version number of the launch template to be set as the default version.	2

Response elements

Element	Type	Description	Example
	object
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E
LaunchTemplateId	string	The ID of the launch template. For more information, see DescribeLaunchTemplates.	lt-bp1apo0bbbkuy0rj****

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
  "LaunchTemplateId": "lt-bp1apo0bbbkuy0rj****"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidRegion.NotExist	%s	The specified region does not exist.
400	MissingParameter	%s	A parameter is not specified.
400	InvalidParameter	%s	The specified parameter is invalid.
403	InnerServiceFailed	%s	An internal service cannot be called.
404	InvalidLaunchTemplate.NotFound	%s	The specified launch template does not exist. Check whether the parameter value is correct.
404	InvalidLaunchTemplateVersion.NotFound	%s	The specified version of the launch template does not exist. Check whether the parameter values are correct.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.