[NIFI-6799] Add RecordSink implementation for Prometheus scraping

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.10.0
• Component/s: Extensions
• Assignee: Matt Burgess
• Reporter: Matt Burgess
• Created: 22/Oct/19 20:18
• Updated: 29/Oct/19 03:33
• Resolved: 29/Oct/19 03:33

Description

With the advent of NIFI-6780, a RecordSinkService controller service interface is available and is used by components like QueryNiFiReportingTask to decouple the collection of data from its destination or transmission method. Initial implementations in NIFI-6780 included a Site-to-Site record sink as well as a DatabaseRecordSink for writing to RDBMS targets.

This Jira proposes to add a RecordSinkService implementation to enable Prometheus scraping. The PrometheusReportingTask exists (via NIFI-5435) to allow scraping of many available metrics, but a PrometheusRecordSink would allow scraping of these plus derived metrics (via SQL queries executed by QueryNiFiReportingTask) and analytical metrics such as connection status predictions (Time-to-Backpressure, e.g.).

Issue Links

• links to: GitHub Pull Request #3839