[jira] [Commented] (AMBARI-6275) Add support for "add hosts" with Blueprints API

["Johannes Klein (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-6275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14248737#comment-14248737 ] 

Johannes Klein commented on AMBARI-6275:
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Being able to specify size of host group instead of having to list host names would improve cloud deployments significantly. Host agents could check-in with Ambari server and register with host group. Ambari could filter by host properties or host agent could be pre-configured with host group token. 

In case of hosts configured for master components such a RM, Name Node etc. configuration would have to refer to host group instances generically. Ambari would have to update configuration and propagate configuration to slave nodes to trigger registration, i.e. to allow data nodes to register with name node etc.  

> Add support for "add hosts" with Blueprints API
> -----------------------------------------------
>
>                 Key: AMBARI-6275
>                 URL: https://issues.apache.org/jira/browse/AMBARI-6275
>             Project: Ambari
>          Issue Type: Epic
>          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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