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From "Yusaku Sako (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-6275) Add support for "add hosts" with Blueprints API
Date Wed, 12 Nov 2014 00:48:34 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-6275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14207433#comment-14207433
] 

Yusaku Sako commented on AMBARI-6275:
-------------------------------------

[~jspeidel]
Questions:
1. Is it possible to use the inline host_group format to add hosts to a cluster that was not
created via a blueprint?
2. Is it possible to have this API perform in a transactional manner?  Say I'm adding a host
and 5 host components are to be added.  If 2 host components fail to install, then I want
to roll back the whole thing.  Or say I'm adding 5 hosts and 2 hosts failed to install, etc.
3. Once you add a host by specifying a host group, is the meta info about the added host belonging
to the specified host group made available via the API?



> Add support for "add hosts" with Blueprints API
> -----------------------------------------------
>
>                 Key: AMBARI-6275
>                 URL: https://issues.apache.org/jira/browse/AMBARI-6275
>             Project: Ambari
>          Issue Type: Improvement
>          Components: ambari-server
>    Affects Versions: 1.7.0
>            Reporter: Yusaku Sako
>            Assignee: John Speidel
>             Fix For: 2.0.0
>
>
> Support for "adding hosts" based on *blueprint* style *host_group* via Ambari REST API.
There are two scenarios to consider for this JIRA:
> 1) Add hosts based on an existing host in the cluster (and it's *blueprint* style *host_group*
component layout). This enables the user to add hosts with components similar to existing
hosts in the cluster. For example: expand this cluster with these X hosts and make each of
these hosts like Y host (components + configs) existing in the cluster.
> 2) Add hosts based on components + configs. This would be a verbose method that uses
*blueprint* style *host_groups* and *configs* to allow you to add hosts to a cluster that
do not necessarily have a component layout or config of a similar host existing in the cluster.
For example: expand this cluster with these X hosts and make each of these hosts include Y
components with Z configs. 



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