CompositeAlarm

Source: src/AWS/CloudWatch/CompositeAlarm.ts

A CloudWatch composite alarm — combines the states of other alarms with a boolean AlarmRule expression so a single alarm (and its actions) reflects overall health.

Creating Composite Alarms

Composite Rule

const composite = yield* CompositeAlarm("HighSeverity", {
  AlarmRule: 'ALARM("HighErrors") OR ALARM("HighLatency")',
});

Compose Alarm Resources with Output.interpolate

const errors = yield* Alarm("HighErrors", {
  MetricName: "Errors",
  Namespace: "AWS/Lambda",
  Statistic: "Sum",
  Period: 60,
  EvaluationPeriods: 1,
  Threshold: 1,
  ComparisonOperator: "GreaterThanOrEqualToThreshold",
});

const composite = yield* CompositeAlarm("HighSeverity", {
  AlarmRule: Output.interpolate`ALARM("${errors.alarmName}")`,
});