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[jira] [Created] (FLINK-9703) Mesos does not expose TM Prometheus port

Rune Skou Larsen created FLINK-9703:

             Summary: Mesos does not expose TM Prometheus port
                 Key: FLINK-9703
                 URL: https://issues.apache.org/jira/browse/FLINK-9703
             Project: Flink
          Issue Type: Bug
          Components: Mesos
            Reporter: Rune Skou Larsen

LaunchableMesosWorker makes Mesos expose these ports for a Task Manager:

{{private static final String[] TM_PORT_KEYS = {}}
{{ "taskmanager.rpc.port",}}
{{ "taskmanager.data.port"};}}

But when running Prometheus Exporter on a TM, another port needs to be exposed to make Flink's Prometheos endpoint externally scrapable by the Prometheus server. By default this is port 9249, but it is configurable according to:



My plan is to make a PR, that just adds another config option for mesos, to enable custom ports to be exposed in the provisioned TMs.

I considered carrying parts of the Metrics config into the Mesos code to automatically map metrics ports in mesos. But making such a "shortcut" between Flink's metrics and mesos modules would probably need some sort of integration testing, so I prefer the simple solution of just adding another Mesos config option. But comments are welcome.

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