Use ListInstanceCount to query the number of deployable nodes - Microservices Engine - Alibaba Cloud - Microservices Engine

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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

mse:ListInstanceCount

get

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
ClusterType	string	No	The type of the instance. Valid values: ZooKeeper and Nacos-Ans.	Nacos-Ans
MseVersion	string	No	The edition of the instance. Valid values: `mse_dev`: Developer Edition `mse_pro`: Professional Edition	mse_pro
RegionId	string	No	The ID of the region where the instance resides. Examples: cn-hangzhou: China (Hangzhou) cn-beijing: China (Beijing) cn-shanghai: China (Shanghai) cn-zhangjiakou: China (Zhangjiakou) cn-shenzhen: China (Shenzhen)	cn-hangzhou
RequestPars	string	No	Extended request parameters in JSON format.	{}
AcceptLanguage	string	No	The language of the response. Valid values: zh: Chinese en: English	zh

Response elements

Element	Type	Description	Example
	object	The data structure.
RequestId	string	The ID of the request.	316F5F64-F73D-42DC-8632-01E308B6****
Success	boolean	Whether the request was successful. Valid values: `true`: The request was successful. `false`: The request failed.	true
Code	integer	The status code. 200 indicates success.	200
ErrorCode	string	The error code returned if the request failed. For more information, see the Error codes section of this topic.	mse-100-100
HttpStatusCode	integer	The HTTP status code returned.	200
Message	string	The response message. Returns a success message on success, or an error message on failure.	The request was successfully processed.
DynamicCode	string	The dynamic part in the error message.	%s
DynamicMessage	string	The dynamic part in the error message, used to replace `%s` in the `ErrMessage` parameter. Note If the return value of the `ErrMessage` parameter is `The Value of Input Parameter %s is not valid` and the return value of the `DynamicMessage` parameter is `DtsJobId`, the specified `DtsJobId` parameter is invalid.	The specified parameter is invalid.
Data	array	The data entries returned.
	integer	The number of nodes that can be deployed for the instance of the current edition.	3

Examples

Success response

JSON format

{
  "RequestId": "316F5F64-F73D-42DC-8632-01E308B6****",
  "Success": true,
  "Code": 200,
  "ErrorCode": "mse-100-100",
  "HttpStatusCode": 200,
  "Message": "The request was successfully processed.\n",
  "DynamicCode": "%s",
  "DynamicMessage": "The specified parameter is invalid.",
  "Data": [
    3
  ]
}

Error codes

HTTP status code	Error code	Error message	Description
400	IllegalRequest	Invalid request:%s	Invalid request: %s
400	InvalidParameter	Parameter error:%s	Request parameter error: %s
500	InternalError	Console error. Try again later:%s	Console error. Try again later: %s
403	NoPermission	You are not authorized to perform this operation:%s	You do not have the permission to use this interface:%s
404	NotFound	Not found:%s	The resource does not exist:%s

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.