[jira] [Resolved] (AMBARI-12002) Support ordered component installs.

["Christopher Jackson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-12002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Christopher Jackson resolved AMBARI-12002.
------------------------------------------
       Resolution: Fixed
    Fix Version/s: 2.2.0

This has been resolved since Ambari 2.2. Now each service can define its own role command order by including the role_command_order.json file in its service folder.

> Support ordered component installs. 
> ------------------------------------
>
>                 Key: AMBARI-12002
>                 URL: https://issues.apache.org/jira/browse/AMBARI-12002
>             Project: Ambari
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>         Environment: HDP2.2, RHEL6
>            Reporter: Christopher Jackson
>             Fix For: 2.2.0
>
>
> When defining a custom service it may involve a component which needs to modify another component. As such the order in which components install becomes important. This could be achieved by looking at the list of dependencies for a given component. It should enforce that all components listed as dependencies with a scope of host are installed prior to the given component. 
> Per Sumit Mohanty, 'Its easy to implement an install order as well - basically call the same helper method as done for START.'
> In my use case I have CUSTOM_SERVICE/CUSTOM_CLIENT that has a scope:host dependency on HDFS/HDFS_CLIENT and HBASE/HBASE_CLIENT, I would expect HDFS_CLIENT and HBASE_CLIENT to install before CUSTOM_CLIENT.



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