feat: Infer ARN from dimensions during discovery. - #1926
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Adds a per-service ArnFromDimensionsFunc field that builds a resource ARN directly from a metric's dimensions, without requiring the resource to be discovered via the Tagging API first. Left nil wherever the canonical ARN can't be trivially derived from dimensions alone -- e.g. it embeds an internal ID CloudWatch doesn't expose (AutoScaling, Kafka), the format has undocumented edge cases (DMS, WAFV2, EventBridge default bus, StorageGateway, API Gateway), or the namespace has no fixed resource type at all. Best-effort, derived from documented AWS ARN formats; not yet validated against live AWS API responses. Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
…nd ArnFromDimensions Verified against live resources in a sandbox account: - AWS/Prometheus (amp): "Workspace" dimension is the workspace ID, maps directly onto the ARN (service segment is "aps", not "prometheus"). - AWS/Scheduler: metrics are only dimensioned by "ScheduleGroup", not per-schedule -- the ARN this reconstructs is the schedule group's. - AWS/ECR: "RepositoryName" dimension is the repository name. Also confirmed AWS/Redshift-Serverless can't be covered by either DimensionRegexps or ArnFromDimensions: its "Namespace"/"Workgroup" dimensions carry the resource name, but the canonical ARN embeds an internal UUID that isn't derivable from the name. Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
Verified against live resources in a sandbox account: - AWS/Timestream: "DatabaseName"/"TableName" dimensions map directly onto the ARN structure. - AWS/RUM: "application_name" dimension is the app monitor name (only appears once a CloudWatch metrics destination is explicitly configured via PutRumMetricsDestination -- it's not on by default). - AWS/AppRunner: uniquely among the UUID-suffixed ARN services checked so far, CloudWatch publishes both "ServiceName" and "ServiceID" as separate dimensions, so the full ARN (which needs both) is reconstructable. AWS/Transfer, and the three SageMaker job-type namespaces, remain unresolved: Transfer needs real SFTP transfer activity to emit any metrics at all, and two separate SageMaker training jobs run to completion produced zero metrics under any SageMaker namespace with a bare (non-framework) container. Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
…rnFromDimensions Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
Signed-off-by: Karsten Jeschkies <karsten.jeschkies@grafana.com>
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This changes adds a few missing dimensions regexp to match more namespace to tagged resources. It also offers an optional fallback that infers the ARN and thus resource name from the metric dimensions in case a resources isn't tagged and couldn't be found using
GetTaggedResources.