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