AlarmProps¶

class aws_cdk.aws_cloudwatch.AlarmProps(*, evaluation_periods, threshold, actions_enabled=None, alarm_description=None, alarm_name=None, comparison_operator=None, datapoints_to_alarm=None, evaluate_low_sample_count_percentile=None, period=None, statistic=None, treat_missing_data=None, metric)¶

Bases: aws_cdk.aws_cloudwatch.CreateAlarmOptions

Properties for Alarms.

Parameters

evaluation_periods (Union[int, float]) – The number of periods over which data is compared to the specified threshold.
threshold (Union[int, float]) – The value against which the specified statistic is compared.
actions_enabled (Optional[bool]) – Whether the actions for this alarm are enabled. Default: true
alarm_description (Optional[str]) – Description for the alarm. Default: No description
alarm_name (Optional[str]) – Name of the alarm. Default: Automatically generated name
comparison_operator (Optional[ComparisonOperator]) – Comparison to use to check if metric is breaching. Default: GreaterThanOrEqualToThreshold
datapoints_to_alarm (Union[int, float, None]) – The number of datapoints that must be breaching to trigger the alarm. This is used only if you are setting an “M out of N” alarm. In that case, this value is the M. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide. Default: evaluationPeriods
evaluate_low_sample_count_percentile (Optional[str]) – Specifies whether to evaluate the data and potentially change the alarm state if there are too few data points to be statistically significant. Used only for alarms that are based on percentiles. Default: - Not configured.
period (Optional[Duration]) – (deprecated) The period over which the specified statistic is applied. Cannot be used with MathExpression objects. Default: - The period from the metric
statistic (Optional[str]) – (deprecated) What function to use for aggregating. Can be one of the following: - “Minimum” | “min” - “Maximum” | “max” - “Average” | “avg” - “Sum” | “sum” - “SampleCount | “n” - “pNN.NN” Cannot be used with MathExpression objects. Default: - The statistic from the metric
treat_missing_data (Optional[TreatMissingData]) – Sets how this alarm is to handle missing data points. Default: TreatMissingData.Missing
metric (IMetric) – The metric to add the alarm on. Metric objects can be obtained from most resources, or you can construct custom Metric objects by instantiating one.

Attributes

actions_enabled¶

Whether the actions for this alarm are enabled.

Default: true
Return type: Optional[bool]

alarm_description¶

Description for the alarm.

Default: No description
Return type: Optional[str]

alarm_name¶

Name of the alarm.

Default: Automatically generated name
Return type: Optional[str]

comparison_operator¶

Comparison to use to check if metric is breaching.

Default: GreaterThanOrEqualToThreshold
Return type: Optional[ComparisonOperator]

datapoints_to_alarm¶

The number of datapoints that must be breaching to trigger the alarm.

This is used only if you are setting an “M out of N” alarm. In that case, this value is the M. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide.

Default: evaluationPeriods
See: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarm-evaluation
Return type: Union[int, float, None]

evaluate_low_sample_count_percentile¶

Specifies whether to evaluate the data and potentially change the alarm state if there are too few data points to be statistically significant.

Used only for alarms that are based on percentiles.

Default

Not configured.

Return type

Optional[str]

evaluation_periods¶

The number of periods over which data is compared to the specified threshold.

Return type: Union[int, float]

metric¶

The metric to add the alarm on.

Metric objects can be obtained from most resources, or you can construct custom Metric objects by instantiating one.

Return type: IMetric

period¶

(deprecated) The period over which the specified statistic is applied.

Cannot be used with MathExpression objects.

Default

The period from the metric

Deprecated

Use metric.with({ period: ... }) to encode the period into the Metric object

Stability

deprecated

Return type

Optional[Duration]

statistic¶

(deprecated) What function to use for aggregating.

Can be one of the following:

“Minimum” | “min”
“Maximum” | “max”
“Average” | “avg”
“Sum” | “sum”
“SampleCount | “n”
“pNN.NN”

Cannot be used with MathExpression objects.

Default

The statistic from the metric

Deprecated

Use metric.with({ statistic: ... }) to encode the period into the Metric object

Stability

deprecated

Return type

Optional[str]

threshold¶

The value against which the specified statistic is compared.

Return type: Union[int, float]

treat_missing_data¶

Sets how this alarm is to handle missing data points.

Default: TreatMissingData.Missing
Return type: Optional[TreatMissingData]