Lambda Support as CloudWatch Alarm Action

[rememberYou]

Feature scope

CloudWatch

Describe your suggested feature

Since the end of December 2023, AWS now supports the triggering of a Lambda function as a CloudWatch Alarm action target (cf. https://aws.amazon.com/about-aws/whats-new/2023/12/amazon-cloudwatch-alarms-lambda-change-action/). This is useful, for example, when you want to modify the email body before sending it to another SNS topic where a list of email addresses is subscribed.

Currently, cdk-monitoring-constructs only supports SNS topics like CloudWatch Alarms action. Would it be possible to implement Lambda as an Alarm action as well?

[echeung-amzn]

Seems reasonable to add, but we'd need to bump up to >= v2.119.0 first (we're currently at >= v2.112.0).

aws/aws-cdk@b9f4923

In the meantime if you're already using a newer version of aws-cdk-lib, you can implement something like how SNS is handled, but using LambdaAction.