DescribeRegions - Auto Scaling - Alibaba Cloud Documentation Center

Queries regions. Before you activate Auto Scaling, you can call the DescribeRegions operation to query the regions where Auto Scaling is officially launched. This preliminary step facilitates the strategic selection of both the optimal region and availability zones for activating Auto Scaling, thereby guaranteeing the finest access speeds and operational efficiency within your chosen geographical area.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Debug

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
ess:DescribeRegions	Read	All Resources *	none	none

Request parameters

Parameter	Type	Required	Description	Example
AcceptLanguage	string	No	The language for the response. For more information, see RFC7231 . Valid values: zh-CN: Chinese en-US: English ja: Japanese Default value: zh-CN.	zh-CN

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The ID of the request.	73469C7-AA6F-4DC5-B3DB-A3DC0DE3****
Regions	object []	The collection of region information.
ClassicUnavailable	boolean	Indicates whether the current region supports scaling groups that reside in the classic network. Valid values: true false	false
RegionEndpoint	string	The region endpoint.	ess.aliyuncs.com
LocalName	string	The region name.	China (Beijing)
VpcUnavailable	boolean	Indicates whether the current region supports scaling groups that reside in virtual private clouds (VPCs). Valid values: true false	false
RegionId	string	The region ID.	cn-beijing

Examples

Sample success responses

JSONformat

{
  "RequestId": "73469C7-AA6F-4DC5-B3DB-A3DC0DE3****",
  "Regions": [
    {
      "ClassicUnavailable": false,
      "RegionEndpoint": "ess.aliyuncs.com",
      "LocalName": "China (Beijing)\n",
      "VpcUnavailable": false,
      "RegionId": "cn-beijing"
    }
  ]
}

Error codes

For a list of error codes, visit the Service error codes.