Request Parameters Response Elements Errors See Also

DescribeAlarmHistory

Retrieves the history for the specified alarm. You can filter the results by date range or item type. If an alarm name is not specified, the histories for either all metric alarms or all composite alarms are returned.

CloudWatch retains the history of an alarm even if you delete the alarm.

To use this operation and return information about a composite alarm, you must be signed on with the cloudwatch:DescribeAlarmHistory permission that is scoped to *. You can't return information about composite alarms if your cloudwatch:DescribeAlarmHistory permission has a narrower scope.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

AlarmName

The name of the alarm.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 255.

Required: No

AlarmTypes.member.N

Use this parameter to specify whether you want the operation to return metric alarms or composite alarms. If you omit this parameter, only metric alarms are returned.

Type: Array of strings

Valid Values: CompositeAlarm | MetricAlarm

Required: No

EndDate

The ending date to retrieve alarm history.

Type: Timestamp

Required: No

HistoryItemType

The type of alarm histories to retrieve.

Type: String

Valid Values: ConfigurationUpdate | StateUpdate | Action

Required: No

MaxRecords

The maximum number of alarm history records to retrieve.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 100.

Required: No

NextToken

The token returned by a previous call to indicate that there is more data available.

Type: String

Required: No

ScanBy

Specified whether to return the newest or oldest alarm history first. Specify TimestampDescending to have the newest event history returned first, and specify TimestampAscending to have the oldest history returned first.

Type: String

Valid Values: TimestampDescending | TimestampAscending

Required: No

StartDate

The starting date to retrieve alarm history.

Type: Timestamp

Required: No

Response Elements

The following elements are returned by the service.

AlarmHistoryItems.member.N

The alarm histories, in JSON format.

Type: Array of AlarmHistoryItem objects

NextToken

The token that marks the start of the next batch of returned results.

Type: String

Errors

For information about the errors that are common to all actions, see Common Errors.

InvalidNextToken

The next token specified is invalid.

HTTP Status Code: 400