describe-alarm-history¶

Description¶

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.

Synopsis¶

  describe-alarm-history
[--alarm-name <value>]
[--alarm-types <value>]
[--history-item-type <value>]
[--start-date <value>]
[--end-date <value>]
[--scan-by <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options¶

--alarm-name (string)

The name of the alarm.

--alarm-types (list)

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.

(string)

Syntax:

"string" "string" ...

Where valid values are:
  CompositeAlarm
  MetricAlarm

--history-item-type (string)

The type of alarm histories to retrieve.

Possible values:

ConfigurationUpdate

StateUpdate

Action

--start-date (timestamp)

The starting date to retrieve alarm history.

--end-date (timestamp)

The ending date to retrieve alarm history.

--scan-by (string)

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.

Possible values:

TimestampDescending

TimestampAscending

--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¶

To retrieve history for an alarm

The following example uses the describe-alarm-history command to retrieve history for the Amazon CloudWatch alarm named “myalarm”:

aws cloudwatch describe-alarm-history --alarm-name "myalarm" --history-item-type StateUpdate

Output:

{
    "AlarmHistoryItems": [
        {
            "Timestamp": "2014-04-09T18:59:06.442Z",
            "HistoryItemType": "StateUpdate",
            "AlarmName": "myalarm",
            "HistoryData": "{\"version\":\"1.0\",\"oldState\":{\"stateValue\":\"ALARM\",\"stateReason\":\"testing purposes\"},\"newState\":{\"stateValue\":\"OK\",\"stateReason\":\"Threshold Crossed: 2 datapoints were not greater than the threshold (70.0). The most recent datapoints: [38.958, 40.292].\",\"stateReasonData\":{\"version\":\"1.0\",\"queryDate\":\"2014-04-09T18:59:06.419+0000\",\"startDate\":\"2014-04-09T18:44:00.000+0000\",\"statistic\":\"Average\",\"period\":300,\"recentDatapoints\":[38.958,40.292],\"threshold\":70.0}}}",
            "HistorySummary": "Alarm updated from ALARM to OK"
        },
        {
            "Timestamp": "2014-04-09T18:59:05.805Z",
            "HistoryItemType": "StateUpdate",
            "AlarmName": "myalarm",
            "HistoryData": "{\"version\":\"1.0\",\"oldState\":{\"stateValue\":\"OK\",\"stateReason\":\"Threshold Crossed: 2 datapoints were not greater than the threshold (70.0). The most recent datapoints: [38.839999999999996, 39.714].\",\"stateReasonData\":{\"version\":\"1.0\",\"queryDate\":\"2014-03-11T22:45:41.569+0000\",\"startDate\":\"2014-03-11T22:30:00.000+0000\",\"statistic\":\"Average\",\"period\":300,\"recentDatapoints\":[38.839999999999996,39.714],\"threshold\":70.0}},\"newState\":{\"stateValue\":\"ALARM\",\"stateReason\":\"testing purposes\"}}",
            "HistorySummary": "Alarm updated from OK to ALARM"
        }
    ]
}

Output¶

AlarmHistoryItems -> (list)

The alarm histories, in JSON format.

(structure)

Represents the history of a specific alarm.

AlarmName -> (string)

The descriptive name for the alarm.

AlarmType -> (string)

The type of alarm, either metric alarm or composite alarm.

Timestamp -> (timestamp)

The time stamp for the alarm history item.

HistoryItemType -> (string)

The type of alarm history item.

HistorySummary -> (string)

A summary of the alarm history, in text format.

HistoryData -> (string)

Data about the alarm, in JSON format.

NextToken -> (string)

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

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