[jira] [Created] (FLINK-32062) Expose MetricGroup in FlinkResourceListener interface to allow users to create custom metrics

["Tamir Sagi (Jira)" <ji...@apache.org>]

Tamir Sagi created FLINK-32062:
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             Summary: Expose MetricGroup in FlinkResourceListener interface to allow users to create custom metrics
                 Key: FLINK-32062
                 URL: https://issues.apache.org/jira/browse/FLINK-32062
             Project: Flink
          Issue Type: Improvement
          Components: Kubernetes Operator
            Reporter: Tamir Sagi


The operator supports pluggable {{FlinkResourceListener}} which provides the events & deployment status. However, such interface does not expose MetricManager/any way to create custom meters.
Which means that if users would like to create custom metrics per deployments(failures rate, scaling counter, any other metric per events) there is no way to attach it via operator metric system.

There are some basic metrics created per namespace in

{{org.apache.flink.kubernetes.operator.metrics.FlinkDeploymentMetrics}}

My suggestion is to expose either operator metric manager or another entity which provides a way to create meters(and internally registers them via MetricManager) in FlinkResourceListener interface.



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