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From "Robert Nettleton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-8771) Blueprints: Add support for deploying HDFS NameNode HA Clusters
Date Wed, 17 Dec 2014 21:21:13 GMT
Robert Nettleton created AMBARI-8771:
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             Summary: Blueprints: Add support for deploying HDFS NameNode HA Clusters
                 Key: AMBARI-8771
                 URL: https://issues.apache.org/jira/browse/AMBARI-8771
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: 1.7.0
            Reporter: Robert Nettleton
            Assignee: Robert Nettleton
             Fix For: 2.0.0


It should be possible to deploy a cluster using Blueprints that can support HDFS NameNode
HA.  

Currently in Ambari, the User Interface supports adding HA support for NameNodes to a running
cluster.  

In the Blueprint case, the HA support for NameNodes must be added at the initial cluster deployment/startup,
since Blueprints does not support an interactive model.  

The support for NameNode HA in Ambari 2.0 should at least support an "expert mode" option,
where the user adds all of the required HA configuration to the Blueprint or cluster creation
template in order to setup an HA cluster.  In future releases, it may be possible to auto-generate
some of this configuration, in order to ease the burden of HA setup for the Blueprints/Ambari
user.  

This work will involve changes to the Blueprint validation code, since our stacks do not currently
support HA directly.  It should be possible to deploy a NameNode HA Blueprint without turning
off Blueprint validation.  





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