# AlarmMuteRule

A CloudWatch Alarm Mute Rule.

Extends: Construct › Resource › AlarmMuteRule
Implements: IResource, IAlarmMuteRule, IEnvironmentAware, IAlarmMuteRuleRef, IConstruct, IDependable

- CloudFormation: [`AWS::CloudWatch::AlarmMuteRule`](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-cloudwatch-alarmmuterule.html)
- L1 type: [`CfnAlarmMuteRule`](/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.CfnAlarmMuteRule.html)
- Source: [`aws-cloudwatch/lib/alarm-mute-rule.ts`](https://github.com/aws/aws-cdk/blob/v2.277.0/packages/aws-cdk-lib/aws-cloudwatch/lib/alarm-mute-rule.ts#L244)
- Type last changed: v2.264.0 · 10 Aug 2026

## Example

```ts
declare const alarm1: cloudwatch.Alarm;
declare const alarm2: cloudwatch.Alarm;

const alarmMuteRule = new cloudwatch.AlarmMuteRule(this, 'AlarmMuteRule', {
  alarms: [alarm1],
  // Defines the mute period begins at 0:00 everyday in UTC
  schedule: cloudwatch.ScheduleExpression.cron({ minute: '0', hour: '0' }),
  // Specifies the mute rule lasts 1 hour.
  duration: Duration.hours(1),
})

// The mute target can be added after construction.
alarmMuteRule.addAlarm(alarm2);
```

## Initializer

```ts
new AlarmMuteRule(scope: Construct, id: string, props: AlarmMuteRuleProps)
```

## Construct Props

- `alarmMuteRuleName`: string — The name of the alarm mute rule.

  **Default:** generated by CloudFormation

  This name must be unique within your AWS account and region.

- `alarms`: [IAlarmRef](/cdk/api/v2/docs/aws-cdk-lib.interfaces.aws_cloudwatch.IAlarmRef.html)[] — The list of alarms that this mute rule targets.

  **Default:** no target alarms

  You can specify up to 100 alarms.

- `description`: string — A description of the alarm mute rule that helps you identify its purpose.

  **Default:** no description

- `duration`: [Duration](/cdk/api/v2/docs/aws-cdk-lib.Duration.html) (required) — The length of time that alarms remain muted when the schedule activates.

  Minimum: 1 minute,
  Maximum: 15 days

- `expire`: [CalendarDateTime](/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.CalendarDateTime.html) — The date and time when the mute rule expires and is no longer evaluated.

  **Default:** no configuration

  After this time, the rule status becomes EXPIRED and will no longer mute the targeted alarms.

  This date and time is interpreted according to the schedule timezone, or UTC if no timezone is specified.

- `schedule`: [ScheduleExpression](/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.ScheduleExpression.html) (required) — The schedule defines when alarms should be muted.

- `start`: [CalendarDateTime](/cdk/api/v2/docs/aws-cdk-lib.aws_cloudwatch.CalendarDateTime.html) — The date and time after which the mute rule takes effect.

  **Default:** no configuration

  If not specified, the mute rule takes effect immediately upon creation and the mutes are applied as per the schedule expression.

  This date and time is interpreted according to the schedule timezone, or UTC if no timezone is specified.

- `tags`: { [key: string]: string } — A list of tags associated with the alarm mute rule.

  **Default:** No tags are applied

  Tags help you organize and categorize your AWS resources.

## Properties

- `alarmMuteRuleArn`: string — ARN of this alarm mute rule.

- `alarmMuteRuleName`: string — Name of this alarm mute rule.

- `alarmMuteRuleRef`: [AlarmMuteRuleReference](/cdk/api/v2/docs/aws-cdk-lib.interfaces.aws_cloudwatch.AlarmMuteRuleReference.html) — A reference to a AlarmMuteRule resource.

- `env`: [ResourceEnvironment](/cdk/api/v2/docs/aws-cdk-lib.interfaces.ResourceEnvironment.html) — The environment this resource belongs to.

  For resources that are created and managed in a Stack (those created by
  creating new class instances like `new Role()`, `new Bucket()`, etc.), this
  is always the same as the environment of the stack they belong to.

  For referenced resources (those obtained from referencing methods like
  `Role.fromRoleArn()`, `Bucket.fromBucketName()`, etc.), they might be
  different than the stack they were imported into.

- `node`: [Node](/cdk/api/v2/docs/constructs.Node.html) — The tree node.

- `PROPERTY_INJECTION_ID`: string (static) — Uniquely identifies this class.

- `stack`: [Stack](/cdk/api/v2/docs/aws-cdk-lib.Stack.html) — The stack in which this resource is defined.

## Methods

- `addAlarm(alarm: IAlarmRef): void` — Add a CloudWatch alarm to mute rule target alarms.

- `applyCrossStackReferenceStrength(strength: ReferenceStrength): void` — Override the cross-stack reference strength for this resource.

  When set, any cross-stack reference to this resource will use the specified
  mechanism instead of the global default determined by the
  `@aws-cdk/core:defaultCrossStackReferences` context key. This is useful for
  selectively weakening specific references to avoid the "deadly embrace" problem
  without changing the app-wide default.

  **Parameters**

  - `strength` — - The reference strength to use for this resource.

- `applyRemovalPolicy(policy: RemovalPolicy): void` — Apply the given removal policy to this resource.

  The Removal Policy controls what happens to this resource when it stops
  being managed by CloudFormation, either because you've removed it from the
  CDK application or because you've made a change that requires the resource
  to be replaced.

  The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
  account for data recovery and cleanup later (`RemovalPolicy.RETAIN`).

- `fromAlarmMuteRuleArn(scope: Construct, id: string, alarmMuteRuleArn: string): IAlarmMuteRule` (static) — Import an existing CloudWatch alarm mute rule provided an ARN.

  **Parameters**

  - `scope` — The parent creating construct (usually `this`).
  - `id` — The construct's name.
  - `alarmMuteRuleArn` — Alarm Mute Rule ARN.

- `fromAlarmMuteRuleName(scope: Construct, id: string, alarmMuteRuleName: string): IAlarmMuteRule` (static) — Import an existing CloudWatch alarm mute rule provided an Name.

  **Parameters**

  - `scope` — The parent creating construct (usually `this`).
  - `id` — The construct's name.
  - `alarmMuteRuleName` — Alarm Mute Rule Name.

- `isConstruct(x: any): boolean` (static) — Checks if `x` is a construct.

  Use this method instead of `instanceof` to properly detect `Construct`
  instances, even when the construct library is symlinked.

  Explanation: in JavaScript, multiple copies of the `constructs` library on
  disk are seen as independent, completely different libraries. As a
  consequence, the class `Construct` in each copy of the `constructs` library
  is seen as a different class, and an instance of one class will not test as
  `instanceof` the other class. `npm install` will not create installations
  like this, but users may manually symlink construct libraries together or
  use a monorepo tool: in those cases, multiple copies of the `constructs`
  library can be accidentally installed, and `instanceof` will behave
  unpredictably. It is safest to avoid using `instanceof`, and using
  this type-testing method instead.

  **Parameters**

  - `x` — Any object.

  **Returns:** true if `x` is an object created from a class which extends `Construct`.

- `isOwnedResource(construct: IConstruct): boolean` (static) — Returns true if the construct was created by CDK, and false otherwise.

- `isResource(construct: IConstruct): boolean` (static) — Check whether the given construct is a Resource.

- `toString(): string` — Returns a string representation of this construct.

- `with(...mixins: IMixin[]): IConstruct` — Applies one or more mixins to this construct.

  Mixins are applied in order. The list of constructs is captured at the
  start of the call, so constructs added by a mixin will not be visited.
  Use multiple `with()` calls if subsequent mixins should apply to added
  constructs.