[HDDS-846] Exports ozone metrics to prometheus

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Component/s: Ozone Manager, SCM
• Target Version/s: 0.4.0
• Sprint: HDDS BadLands
• Assignee: Marton Elek
• Reporter: Marton Elek
• Created: 16/Nov/18 17:07
• Updated: 26/Jun/19 17:42
• Resolved: 28/Nov/18 01:50

Description

As described in the parent issue, as of now we use a java agent based dark magic to get all the hadoop metrics values in prometheus http format.

The format is very simple (https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md) and it would be easy to implement a simple form of prometheus servlet.

With publishing the metrics with an included servlet the k8s deployment could be more simple and will be easier to provide ways to run ozone in cloud native environments.

Issue Links

• is related to: HADOOP-16398 Exports Hadoop metrics to Prometheus