JMX metric for hadoop namenode url http://127.0.0.1:50070/jmx can be monitored using Eagle. Follow below steps to enable this feature in Eagle.

  1. Install Python script (To populate JMX metric values to Kafka message topic periodically.)
  2. Deploy “hadoopjmx” storm topology.
  3. Create new site and policy in UI
  4. Validate policy alert.

Prerequisite

Setup

From Hortonworks sandbox just run below setup script to Install Pyton JMX script, Create Kafka topic, update Hbase tables and deploy “hadoopjmx” storm topology.

$ /usr/hdp/current/eagle/examples/hadoop-metric-sandbox-starter.sh
$ /usr/hdp/current/eagle/examples/hadoop-metric-policy-create.sh

Application Setup in UI

  1. Login to Eagle UI http://localhost:9099/eagle-service/ username and password as “admin” and “secret”
  2. Click on “Admin” from top right and click “Management” button.
  3. On Admin management page add “New Site” name “hadoopJmxMetricDataSource” by clicking on “New Site” link. add superuser
  4. Save the changes.
  5. On eagle home page you should see new tab called “METRIC”, besides “DAM”.
  6. Click on “JmxMetricMonitor” under “METRIC”.

You should see safeModePolicy policy.

Demo

  • First make sure that Kafka topic “nn_jmx_metric_sandbox” is populated with JMX metric data periodically.(To make sure that python script is running)

      $ /usr/hdp/2.2.4.2-2/kafka/bin/kafka-console-consumer.sh --zookeeper sandbox.hortonworks.com:2181 --topic nn_jmx_metric_sandbox

  • Genrate Alert by producing alert triggering message in Kafka topic.

      $ /usr/hdp/2.2.4.2-2/kafka/bin/kafka-console-producer.sh --broker-list sandbox.hortonworks.com:6667 --topic nn_jmx_metric_sandbox
  $ {"host": "localhost", "timestamp": 1457033916718, "metric": "hadoop.namenode.fsnamesystemstate.fsstate", "component": "namenode", "site": "sandbox", "value": 1.0}