AWS CLI Command Reference

[ aws . ec2 ]

describe-instance-event-windows

Description

Describes the specified event windows or all event windows.

If you specify event window IDs, the output includes information for only the specified event windows. If you specify filters, the output includes information for only those event windows that meet the filter criteria. If you do not specify event windows IDs or filters, the output includes information for all event windows, which can affect performance. We recommend that you use pagination to ensure that the operation returns quickly and successfully.

For more information, see Define event windows for scheduled events in the Amazon EC2 User Guide .

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

describe-instance-event-windows is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: InstanceEventWindows

Synopsis

  describe-instance-event-windows
[--dry-run | --no-dry-run]
[--instance-event-window-ids <value>]
[--filters <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options

--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--instance-event-window-ids (list)

The IDs of the event windows.

(string)

Syntax:

"string" "string" ...

--filters (list)

One or more filters.

  • dedicated-host-id - The event windows associated with the specified Dedicated Host ID.

  • event-window-name - The event windows associated with the specified names.

  • instance-id - The event windows associated with the specified instance ID.

  • instance-tag - The event windows associated with the specified tag and value.

  • instance-tag-key - The event windows associated with the specified tag key, regardless of the value.

  • instance-tag-value - The event windows associated with the specified tag value, regardless of the key.

  • tag:<key> - The key/value combination of a tag assigned to the event window. Use the tag key in the filter name and the tag value as the filter value. For example, to find all resources that have a tag with the key Owner and the value CMX , specify tag:Owner for the filter name and CMX for the filter value.

  • tag-key - The key of a tag assigned to the event window. Use this filter to find all event windows that have a tag with a specific key, regardless of the tag value.

  • tag-value - The value of a tag assigned to the event window. Use this filter to find all event windows that have a tag with a specific value, regardless of the tag key.

(structure)

A filter name and value pair that is used to return a more specific list of results from a describe operation. Filters can be used to match a set of resources by specific criteria, such as tags, attributes, or IDs.

If you specify multiple filters, the filters are joined with an AND , and the request returns only results that match all of the specified filters.

Name -> (string)

The name of the filter. Filter names are case-sensitive.

Values -> (list)

The filter values. Filter values are case-sensitive. If you specify multiple values for a filter, the values are joined with an OR , and the request returns all results that match any of the specified values.

(string)

Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

[
  {
    "Name": "string",
    "Values": ["string", ...]
  }
  ...
]

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

Example 1: To describe all event windows

The following describe-instance-event-windows example describes all event windows.

aws ec2 describe-instance-event-windows \
    --region us-east-1

Output:

{
    "InstanceEventWindows": [
        {
            "InstanceEventWindowId": "iew-0abcdef1234567890",
            "Name": "myEventWindowName",
            "CronExpression": "* 21-23 * * 2,3",
            "AssociationTarget": {
                "InstanceIds": [
                    "i-1234567890abcdef0",
                    "i-0598c7d356eba48d7"
                ],
                "Tags": [],
                "DedicatedHostIds": []
            },
            "State": "active",
            "Tags": []
        }

        ...

    ],
    "NextToken": "9d624e0c-388b-4862-a31e-a85c64fc1d4a"
}

For event window constraints, see Considerations in the Scheduled Events section of the Amazon EC2 User Guide.

Example 2: To describe a specific event window

The following describe-instance-event-windows example describes a specific event by using the instance-event-window parameter to describe a specific event window.

aws ec2 describe-instance-event-windows \
    --region us-east-1 \
    --instance-event-window-id iew-0abcdef1234567890

Output:

{
    "InstanceEventWindows": [
        {
            "InstanceEventWindowId": "iew-0abcdef1234567890",
            "Name": "myEventWindowName",
            "CronExpression": "* 21-23 * * 2,3",
            "AssociationTarget": {
                "InstanceIds": [
                    "i-1234567890abcdef0",
                    "i-0598c7d356eba48d7"
                ],
                "Tags": [],
                "DedicatedHostIds": []
            },
            "State": "active",
            "Tags": []
        }
}

For event window constraints, see Considerations in the Scheduled Events section of the Amazon EC2 User Guide.

Example 3: To describe event windows that match one or more filters

The following describe-instance-event-windows example describes event windows that match one or more filters using the filter parameter. The instance-id filter is used to describe all of the event windows that are associated with the specified instance. When a filter is used, it performs a direct match. However, the instance-id filter is different. If there is no direct match to the instance ID, then it falls back to indirect associations with the event window, such as the tags of the instance or Dedicated Host ID (if the instance is a Dedicated Host).

aws ec2 describe-instance-event-windows \
    --region us-east-1 \
    --filters Name=instance-id,Values=i-1234567890abcdef0 \
    --max-results 100 \
    --next-token <next-token-value>

Output:

{
    "InstanceEventWindows": [
        {
            "InstanceEventWindowId": "iew-0dbc0adb66f235982",
            "TimeRanges": [
                {
                    "StartWeekDay": "sunday",
                    "StartHour": 2,
                    "EndWeekDay": "sunday",
                    "EndHour": 8
                }
            ],
            "Name": "myEventWindowName",
            "AssociationTarget": {
                "InstanceIds": [],
                "Tags": [],
                "DedicatedHostIds": [
                    "h-0140d9a7ecbd102dd"
                ]
            },
            "State": "active",
            "Tags": []
        }
    ]
}

In the example output, the instance is on a Dedicated Host, which is associated with the event window.

For event window constraints, see Considerations in the Scheduled Events section of the Amazon EC2 User Guide.

Output

InstanceEventWindows -> (list)

Information about the event windows.

(structure)

The event window.

InstanceEventWindowId -> (string)

The ID of the event window.

TimeRanges -> (list)

One or more time ranges defined for the event window.

(structure)

The start day and time and the end day and time of the time range, in UTC.

StartWeekDay -> (string)

The day on which the time range begins.

StartHour -> (integer)

The hour when the time range begins.

EndWeekDay -> (string)

The day on which the time range ends.

EndHour -> (integer)

The hour when the time range ends.

Name -> (string)

The name of the event window.

CronExpression -> (string)

The cron expression defined for the event window.

AssociationTarget -> (structure)

One or more targets associated with the event window.

InstanceIds -> (list)

The IDs of the instances associated with the event window.

(string)

Tags -> (list)

The instance tags associated with the event window. Any instances associated with the tags will be associated with the event window.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 256 Unicode characters.

DedicatedHostIds -> (list)

The IDs of the Dedicated Hosts associated with the event window.

(string)

State -> (string)

The current state of the event window.

Tags -> (list)

The instance tags associated with the event window.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 256 Unicode characters.

NextToken -> (string)

The token to use to retrieve the next page of results. This value is null when there are no more results to return.

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