Introduce the prometheusPushGatewayReporter

[zuston]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

If having many servers, I hope we use the prometheus push gateway reporter to simplify the metrics collection

Solution

No response

Anything else?

No response

Willingness to contribute

• I'm willing to submit a PR!

[zuston]

cc @wuchong

[wuchong]

+1 for this feature!

For reference, Apache Flink already supports both modes via:

• PrometheusReporter (pull-based)
• PrometheusPushGatewayReporter (push-based)

Would you be interested in contributing this to Fluss? If so, could you please propose a brief design covering:

• The reporter identifier (e.g., prometheus-push),
• The required configuration options (e.g., endpoint, push interval),
• And how it integrates with Fluss’s existing metrics system?

This will help ensure alignment before implementation.

We should also add documentation for the new repoerter and maybe document the difference between pull-based and push-based reporters (Example: https://nightlies.apache.org/flink/flink-docs-master/docs/deployment/metric_reporters/#push-vs-pull).

[zuston]

Would you be interested in contributing this to Fluss? If so, could you please propose a brief design covering:

Sure, thanks for your guide, let me try