import { Duration } from "aws-cdk-lib"; import { ComparisonOperator, TreatMissingData } from "aws-cdk-lib/aws-cloudwatch"; import { IAlarmActionStrategy } from "./action"; import { IMetricAdjuster } from "./metric-adjuster"; /** * Common customization that can be attached to each alarm. */ export interface CustomAlarmThreshold { /** * Allows to override the default alarm action. * * @default - undefined (default action will be used, if any) */ readonly actionOverride?: IAlarmActionStrategy; /** * If this is defined, the alarm dedupe string is set to this exact value. * Please be aware that you need to handle deduping for different stages (Beta, Prod...) and regions (EU, NA...) manually. * * @default - undefined (no override) */ readonly dedupeStringOverride?: string; /** * If this is defined, the alarm name is set to this exact value. * Please be aware that you need to specify prefix for different stages (Beta, Prod...) and regions (EU, NA...) manually. */ readonly alarmNameOverride?: string; /** * A text included in the generated ticket description body, which fully replaces the generated text. * * @default - default auto-generated content only */ readonly alarmDescriptionOverride?: string; /** * If this is defined, the default resource-specific alarm dedupe string will be set and this will be added as a suffix. * This allows you to specify the same dedupe string for a family of alarms. * Cannot be defined at the same time as dedupeStringOverride. * * @default - undefined (no suffix) */ readonly alarmDedupeStringSuffix?: string; /** * Specifies how many samples (N) of the metric is needed in a datapoint to be evaluated for alarming. * If this property is specified, your metric will be subject to MathExpression that will add an IF condition * to your metric to make sure that each datapoint is evaluated only if it has sufficient number of samples. * If the number of samples is not sufficient, the datapoint will be treated as missing data and will be evaluated * according to the treatMissingData parameter. * If specified, deprecated minMetricSamplesToAlarm has no effect. * * @default - default behaviour - no condition on sample count will be used */ readonly minSampleCountToEvaluateDatapoint?: number; /** * This property is required in the following situation: *
    *
  1. minSampleCountToEvaluateDatapoint is specified
  2. *
  3. the metric used for the alarm is a MathExpression
  4. *
  5. the MathExpression is composed of more than one metric
  6. *
* * In this situation, this property indicates the metric Id in the MathExpression’s usingMetrics * property that should be used as the sampleCount metric for the new MathExpression as described in the documentation * for minSampleCountToEvaluateDatapoint. */ readonly sampleCountMetricId?: string; /** * Specifies how many samples (N) of the metric is needed to trigger the alarm. * If this property is specified, a composite alarm is created of the following: * * This composite alarm will be returned as a result and uses the specified alarm actions. * @default - default behaviour - no condition on sample count will be added to the alarm * @deprecated Use minSampleCountToEvaluateDatapoint instead. minMetricSamplesAlarm uses different evaluation * period for its child alarms, so it doesn't guarantee that each datapoint in the evaluation period has * sufficient number of samples */ readonly minMetricSamplesToAlarm?: number; /** * This allows user to attach custom values to this alarm, which can later be accessed from the "useCreatedAlarms" method. * * @default - no tags */ readonly customTags?: string[]; /** * This allows user to attach custom parameters to this alarm, which can later be accessed from the "useCreatedAlarms" method. * * @default - no parameters */ readonly customParams?: Record; /** * Comparison operator used to compare actual value against the threshold. * * @default - alarm-specific default */ readonly comparisonOperatorOverride?: ComparisonOperator; /** * Behaviour in case the metric data is missing. * * @default - alarm-specific default */ readonly treatMissingDataOverride?: TreatMissingData; /** * Used only for alarms based on percentiles. * If you specify false, the alarm state does not change during periods with too few data points to be statistically significant. * If you specify true, the alarm is always evaluated and possibly changes state no matter how many data points are available. * * @default - true */ readonly evaluateLowSampleCountPercentile?: boolean; /** * Enables the configured CloudWatch alarm ticketing actions. * * @default - the same as monitoring facade default */ readonly actionsEnabled?: boolean; /** * Number of breaches required to transition into an ALARM state. * * @default - the same as monitoring facade default */ readonly datapointsToAlarm?: number; /** * Number of periods to consider when checking the number of breaching datapoints. * * @default - the same as monitoring facade default */ readonly evaluationPeriods?: number; /** * Period override for the metric to alarm on. * * @default - the default specified in MetricFactory */ readonly period?: Duration; /** * An optional link included in the generated ticket description body. * * @default - no additional link will be added */ readonly documentationLink?: string; /** * An optional link included in the generated ticket description body. * * @default - no additional link will be added */ readonly runbookLink?: string; /** * Indicates whether the alarming range of values should be highlighted in the widget. * * @default - false */ readonly fillAlarmRange?: boolean; /** * If specified, it modifies the final alarm annotation color. * * @default - no override (default color) */ readonly overrideAnnotationColor?: string; /** * If specified, it modifies the final alarm annotation label. * * @default - no override (default label) */ readonly overrideAnnotationLabel?: string; /** * If specified, it modifies the final alarm annotation visibility. * * @default - no override (default visibility) */ readonly overrideAnnotationVisibility?: boolean; /** * If specified, adjusts the metric before creating an alarm from it. * * @default - no adjuster */ readonly metricAdjuster?: IMetricAdjuster; }