(s3): allow adding BucketMetrics to unowned buckets

[fs111]

BucketMetrics allow one to have per prefix cloudwatch metrics on buckets. The IBucket interface does not allow adding new ones. The IBucket interface is however the only way to get to an existing bucket within the CDK.

Use Case

We are having a data architecture where multiple processes are writing to a central S3 bucket (think data-lake of sorts). We want to be able to build cloud-watch dashboards/alarms on the metrics of the different prefixes being written to. The bucket already exists and can not be made CDK managed right now. Whenever we deploy a new stack that writes to a new prefix in the bucket, we would like to be able to define a metrics filter, that we can see the metrics in cloud-watch. The console UI allows me to do that, but that is not desirable, since we are constantly adding new processes that write to new prefixes.

I believe this is similar to #2004 just with BucketMetrics.

Proposed Solution

I don't know how do do that right now.

Other

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

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This is a 🚀 Feature Request

[otaviomacedo]

Yes, I believe the solution will be similar to the notifications one. We can't work on this immediately, however.

We use +1s to help prioritize our work, and are happy to revaluate this issue based on community feedback. You can reach out to the cdk.dev community on Slack to solicit support for reprioritization.

[github-actions]

This issue has received a significant amount of attention so we are automatically upgrading its priority. A member of the community will see the re-prioritization and provide an update on the issue.