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From "Robert Nettleton" <>
Subject Review Request 34123: Add support for deploying Storm Nimbus HA clusters with Blueprints
Date Tue, 12 May 2015 20:55:39 GMT

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Review request for Ambari, John Speidel, Mahadev Konar, and Robert Levas.

Bugs: AMBARI-11087

Repository: ambari


This patch resolves AMBARI-11087.

The BlueprintConfigurationProcessor has been modified to account for a new Storm property,
"nimbus.seeds", that must be set to a comma-separated list of Nimbus Server hosts.  This property
is used by Storm clients to discover the list of HA Nimbus servers available in the cluster.
 This property uses Yaml, and so the default Yaml PropertyUpdater in the BlueprintConfigurationProcessor
has been modified to account for different Yaml Flow styles.  This patch also registers this
property updater to "nimbus.seeds" for processing during cluster creation. 

This patch also adds unit tests to verify this change, and updates existing unit tests to
accomodate this change as well.





1. Manual testing done with a 3-node cluster.  Current problems with Storm keep the initial
Storm services from starting properly, but I was able to verify that the "nimbus.seeds" configuration
property is set correctly at the completion of the cluster startup.  With a local patch to
Storm itself, I can get all the Storm services to start properly. 
2. Ran the ambari-server unit tests, ran into 1 un-related failure:
"Failed tests:   testPopulateResourcesForRegexpMetrics(org.apache.ambari.server.controller.metrics.timeline.AMSPropertyProviderTest):
expected:<...rics.%25.AvailableMB[]&appId=RESOURCEMANAG...> but was:<...rics.%25.AvailableMB[%2Cyarn.QueueMetrics.%25.AvailableMB._min%2Cyarn.QueueMetrics.%25.AvailableMB._max%2Cyarn.QueueMetrics.%25.AvailableMB._avg%2Cyarn.QueueMetrics.%25.AvailableMB._sum]&appId=RESOURCEMANAG…>".
 This unit test failure will be fixed in a separate patch by the Metrics team.


Robert Nettleton

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