DescribePlanMaintenanceWindows - Elastic Compute Service

Query maintenance windows

Operation description

A configured maintenance policy includes two main attributes.

Maintenance window: A user-specified time period during which O&M can be performed.
Maintenance action: A user-specified policy that determines how to handle instance downtime.

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Test

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:DescribePlanMaintenanceWindows

list

*All Resource

*

None

Request syntax

GET  HTTP/1.1

Request parameters

Parameter	Type	Required	Description	Example
Enable	boolean	No	Indicates whether the maintenance window is enabled.	true
RegionId	string	Yes	The ID of the region where the ECS instance is located. You can call the DescribeRegions operation to query the latest list of Alibaba Cloud regions.	cn-hangzhou
PlanWindowId	string	No	The ID of the maintenance window.	pw-bp1jarob1aup7yvlrdt6
PlanWindowName	string	No	The name of the maintenance window.	WIndowName
TargetResourceGroupId	string	No	The ID of the resource group to which the maintenance window applies.	rg-d85g5yocioezmdrll
TargetResourceTags	object	No	The tags of the resources to which the maintenance window applies.
Value	string	No	The value of the tag.	tagValue
Key	string	No	The key of the tag.	tagKey
NextToken	string	No	The pagination token that is used in the next request to retrieve a new page of results. You do not need to specify this parameter for the first request. You must specify the token that is obtained from the last query as the value of NextToken.	AAAAAdDWBF2
MaxResults	integer	No	The number of entries to return on each page. Valid values: 1 to 100. Default value: 10.	10

Response elements

Element	Type	Description	Example
	object	The response object.
TotalCount	integer	The total number of entries that match the query. This parameter is optional and not returned by default.	1
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3****
PlanMaintenanceWindowList	array<object>	A list of maintenance windows.
	array<object>
PlanWindowId	string	The ID of the maintenance window.	pw-bp1bqkbjb7h4j8zqzwvp
PlanWindowName	string	The name of the maintenance window.	WindowName
Enable	boolean	Indicates whether the maintenance window is enabled.	true
SupportMaintenanceAction	string	The supported maintenance action.	Reboot
CreateTime	string	The creation time of the maintenance window. The time is in UTC and follows the ISO 8601 standard, formatted as yyyy-MM-ddTHH:mm:ssZ.	2025-04-11T02:20:41Z
ModifiedTime	string	The modification time of the maintenance window. The time is in UTC and follows the ISO 8601 standard, formatted as yyyy-MM-ddTHH:mm:ssZ.	2025-02-22 10:14:28 +0800
TimePeriod	object	The recurrence schedule of the maintenance window.
PeriodUnit	string	The recurrence frequency. Valid values: Daily and Weekly.	Year
RangeList	array<object>	The recurring UTC time ranges for the maintenance window.
	object
StartTime	string	The start time of the time range.	Monday,22:00
EndTime	string	The end time of the time range.	Monday,22:00
TargetResource	object	The resources targeted by the maintenance window.
Scope	string	The scope of the target resources. Valid values: Tag, ResourceGroup, Instance, and AliUid.	Tag
ResourceGroupId	string	The ID of the target resource group.	rg-aek2qxeteo7fr6y
Tags	array<object>	The target tags.
	object
Key	string	The tag key.	tagKey
Value	string	The tag value.	tagValue
NextToken	string	The token to retrieve the next page of results.	AAAAAdDWBF2
MaxResults	integer	The number of entries to return per page. The default value is 10, and the maximum value is 100. If you omit this parameter or specify a value less than 10, the default value is used. If you specify a value greater than 100, the maximum value is used.	10

Examples

Success response

JSON format

{
  "TotalCount": 1,
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****",
  "PlanMaintenanceWindowList": [
    {
      "PlanWindowId": "pw-bp1bqkbjb7h4j8zqzwvp",
      "PlanWindowName": "WindowName",
      "Enable": true,
      "SupportMaintenanceAction": "Reboot",
      "CreateTime": "2025-04-11T02:20:41Z",
      "ModifiedTime": "2025-02-22 10:14:28 +0800",
      "TimePeriod": {
        "PeriodUnit": "Year",
        "RangeList": [
          {
            "StartTime": "Monday,22:00",
            "EndTime": "Monday,22:00"
          }
        ]
      },
      "TargetResource": {
        "Scope": "Tag",
        "ResourceGroupId": "rg-aek2qxeteo7fr6y",
        "Tags": [
          {
            "Key": "tagKey",
            "Value": "tagValue"
          }
        ]
      }
    }
  ],
  "NextToken": "AAAAAdDWBF2",
  "MaxResults": 10
}

Error codes

HTTP status code	Error code	Error message	Description
500	InternalError	Internal error.
403	AccessForbidden	User not authorized to operate on the specified resource.	You are not authorized to use the specified resource.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.