Integrate IPA metrics with open-source telemetry implementation

[akoshelev]

Overview

IPA currently does not emit a lot of telemetry but it will soon because we need to look closely at protocol performance at scale. This includes adding metrics and having a means to consume and aggregate them from running instances. This task needs to cover the following

• Pick an open source standard/engine to emit telemetry from IPA web server. statsd, open telemetry, Prometheus can be viable choices. We should strive for k8s compatibility and ease of integration with existing UIs to present them. A bonus point is integration with common clouds.
• Build integration by exposing an endpoint through which metrics can be consumed from a shard/helper.
• Integrate with IPA metrics by building a means to ingest metrics from running queries and send them to the monitoring instance