[GitHub] flink issue #5857: [FLINK-9187][METRICS] add prometheus pushgateway reporter

[lamber-ken]

Github user lamber-ken commented on the issue:

    https://github.com/apache/flink/pull/5857
  
    sorry, I reforked `flink` project, do I need to start a new PR?
    
![image](https://user-images.githubusercontent.com/20113411/41635822-76271486-747d-11e8-9ad3-c6447c1b930c.png)



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