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, treat_missing_data=None, metric)

Bases: 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.
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.

ExampleMetadata:

infused

Example:

import aws_cdk.aws_cloudwatch as cloudwatch

# alias: lambda.Alias

# or add alarms to an existing group
# blue_green_alias: lambda.Alias

alarm = cloudwatch.Alarm(self, "Errors",
    comparison_operator=cloudwatch.ComparisonOperator.GREATER_THAN_THRESHOLD,
    threshold=1,
    evaluation_periods=1,
    metric=alias.metric_errors()
)
deployment_group = codedeploy.LambdaDeploymentGroup(self, "BlueGreenDeployment",
    alias=alias,
    deployment_config=codedeploy.LambdaDeploymentConfig.LINEAR_10PERCENT_EVERY_1MINUTE,
    alarms=[alarm
    ]
)
deployment_group.add_alarm(cloudwatch.Alarm(self, "BlueGreenErrors",
    comparison_operator=cloudwatch.ComparisonOperator.GREATER_THAN_THRESHOLD,
    threshold=1,
    evaluation_periods=1,
    metric=blue_green_alias.metric_errors()
))

Attributes

actions_enabled

Whether the actions for this alarm are enabled.

Default:: true

alarm_description

Description for the alarm.

Default:: No description

alarm_name

Name of the alarm.

Default:: Automatically generated name

comparison_operator

Comparison to use to check if metric is breaching.

Default:: GreaterThanOrEqualToThreshold

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

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.

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

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.

threshold: The value against which the specified statistic is compared.

treat_missing_data

Sets how this alarm is to handle missing data points.

Default:: TreatMissingData.Missing