cloudwatch: support dashboard variables

[humanzz]

Describe the feature

CloudWatch recently released the new dashboard variables feature which allows parameterizing dashboards with variables to reduce repetition/duplication of dashboards

• https://aws.amazon.com/about-aws/whats-new/2023/06/amazon-cloudwatch-dashboard-variables/
• https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/cloudwatch_dashboard_variables.html
• https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/CloudWatch-Dashboard-Body-Structure.html#CloudWatch-Dashboard-Properties-Variables-Structure

Use Case

This feature would enable retiring near identical/duplicate dashboards which only differ in some parameters and enable consolidating them into one single parameterized dashboard

Proposed Solution

No response

Other Information

No response

Acknowledgements

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

CDK version used

2.84.0

Environment details (OS name and version, etc.)

macOS

[pahud]

It is unclear to me how it would be created or referenced in cloudformation. Any insight would be welcome and appreciated.

[Stacy-D]

@pahud, The dashboard variables when created are part of the json which corresponds to the dashboard body. To get the dashboard variables deployed via cloudformation or via CDK, the dashboard body should follow the following format:

{
widgets: [....]
variables: [....] <- new addition to the dashboard json which allow to define the variables. Each variable here is the variable json
}

The proposal for this new feature will be as follows: add new addVariable(variable: IVariable) method to the cloudwatch.Dashboard which would accept the variables of different types following the common IVariable interface. For the types of the IVariable the following will be available: property and pattern based variables.

I intent to make a PR to address this feature request and it will be more clear from it on how these variable work.

[github-actions]

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