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Specifically, Ambari server JVM and database (EclipseLink) metric sources have been wired up to be sent send metrics to AMS, and visualized through Grafana dashboards. 

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NameFunctionalityInterfaceImplementation(s)
Metrics Service
  • Serves as a starting point for the Metrics system.
  • Loads metrics configuration.
  • Initializes the sink. If the sink is not properly initialized (AMS is not yet deployed), it tries to re-initialize every 5 minutes asynchronously.
  • Initializes and starts configured sources.

 

org.apache.ambari.server.metrics.system.MetricsServiceorg.apache.ambari.server.metrics.system.impl.MetricsServiceImpl
Metric Source
  • Any sub-component of Ambari Server that has metrics of interest.
  • Needs subset of metrics configuration corresponding to the source and the Sink to be initialized.
  • Periodically publishes metrics to the Sink.
  • Example - JVM, database etc.
org.apache.ambari.server.metrics.system.MetricsSource

org.apache.ambari.server.metrics.system.impl.JvmMetricsSource

org.apache.ambari.server.metrics.system.impl.DatabaseMetricsSource

Metric Sink
  • Flushes the metrics to an external metrics collection system (Metrics Collector)
org.apache.ambari.server.metrics.system.MetricsSinkorg.apache.ambari.server.metrics.system.impl.AmbariMetricSinkImpl

 

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Configuration

  • All the metrics related configuration are present in the /etc/ambari-server/conf/metrics.properties file. 
  • To add / remove a metric source to be tracked the following config needs to be modified in the metrics.properties file.
            metric.sources=jvm,database
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    Source specific configs are discussed in the metrics source section.

Metric Sources

JVM Metrics

Database Metrics

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