(cloudwatch): Alarm on CloudFront metrics even if the stack is not in us-east-1

[mariotsi]

Describe the feature

Hoping that #16351 is outdated. I would like to create Alarms on metics in other regions.

Use Case

I've a CloudFormation stack in us-west-2 and I would like to alarm on a CloudFront's 4xxErrorRate and other metrics. AFAIK being CloufFront Global it emits metrics in us-east-1.

When on the Metric I specify region = us-east-1 it fails with
Error: Cannot create an Alarm in region 'us-west-2' based on metric '5xxErrorRate' in 'us-east-1'

I don't see a way of alarming on my CF distribution with the current setup. I've the same issue with e Route53 Health Check

Proposed Solution

No response

Other Information

Alarm configuration

new Alarm(scope, id, {
      alarmName: `AlarmName`,
      alarmDescription: `Alarm  errors by CloudFront for the * website`,
      metric: new Metric({
        region: 'us-east-1',
        metricName: `4xxErrorRate`
        namespace: 'AWS/CloudFront',
        statistic: Stats.AVERAGE,
        period: Duration.minutes(1),
        dimensionsMap: {
          DistributionId: cfDistribution.attrId,
          Region: 'Global'
        }
      }),
      comparisonOperator: ComparisonOperator.GREATER_THAN_THRESHOLD,
      threshold: 5,
      evaluationPeriods: 10,
      treatMissingData: TreatMissingData.NOT_BREACHING
    })

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.143.0

Environment details (OS name and version, etc.)

MacOs 14.4.1

[khushail]

Hi @mariotsi , thanks for reaching out.

As mentioned in the cloudwatch docs, cross-region functionality is not supported by Cloudwatch alarms, so CDK can't do anything unless cloudwatch supports it.

Cross-Region functionality is not supported for alarms, so you can't create an alarm in one Region that watches a metric in a different Region.

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