Understanding Ambari Metrics Service

Ambari Metrics System (AMS) collects, aggregates, and serves Hadoop and system metrics in Ambari-managed clusters.

AMS has four components: Metrics Monitors, Hadoop Sinks, Metrics Collector, and Grafana.

• Metrics Monitors on each host in the cluster collect system-level metrics and publish to the Metrics Collector.
• Hadoop Sinks plug in to Hadoop components to publish Hadoop metrics to the Metrics Collector.
• The Metrics Collector is a daemon that runs on a specific host in the cluster and receives data from the registered publishers, the Monitors, and the Sinks.
• Grafana is a daemon that runs on a specific host in the cluster and serves pre-built dashboards for visualizing metrics collected in the Metrics Collector.

This conceptual diagram shows how the components of AMS work together to collect metrics and make those metrics available to Ambari.