[jira] [Updated] (AMBARI-21602) Pre-configure services when Kerberos is enabled to reduce number of core service restarts when services are added

["Robert Levas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-21602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Levas updated AMBARI-21602:
----------------------------------
    Attachment: AMBARI-21602_addendum_01.patch

[^AMBARI-21602_addendum_01.patch] updates {{kerberos_preconfigure.json}} with additional properties to be set for Beacon.

> Pre-configure services when Kerberos is enabled to reduce number of core service restarts when services are added
> -----------------------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-21602
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21602
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-server
>    Affects Versions: 2.6.0
>            Reporter: Robert Levas
>            Assignee: Robert Levas
>             Fix For: 2.6.0
>
>         Attachments: AMBARI-21602_addendum_01.patch, AMBARI-21602_branch-2.6_01.patch, AMBARI-21602_branch-2.6_02.patch, AMBARI-21602_trunk_01.patch, AMBARI-21602_trunk_02.patch
>
>
> Pre-configure (certain) services when Kerberos is enabled to reduce number of core service restarts when services are added.  
> While processing the Kerberos descriptor, include services marked to be _pre-configured_.  When a tagged service is encountered, process it weather it is installed or not. However if it is not installed, only apply configuration changes for existing configuration types.  This will set at least the core-site changes related to proxyuser and auth-to-local rules properties. By doing this, if a tagged service is later installed, the settings will already be in place in the existing service configs and thus the existing services will not need to be restarted. 
> Caveats:
> * Default values for the uninstalled, tagged, services will be assumed 
> * The stack advisor will be used to suggest locations of components - used to build the clusterHostInfo structure that may be used to derive property values. 
> Note: This processing is to occur when Kerberos is enabled. 



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