[jira] [Resolved] (AMBARI-1513) Add ability to re-assign master components to different host after installation

["Jeff Sposetti (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-1513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeff Sposetti resolved AMBARI-1513.
-----------------------------------

    Resolution: Fixed

> Add ability to re-assign master components to different host after installation
> -------------------------------------------------------------------------------
>
>                 Key: AMBARI-1513
>                 URL: https://issues.apache.org/jira/browse/AMBARI-1513
>             Project: Ambari
>          Issue Type: Improvement
>            Reporter: Jeff Sposetti
>             Fix For: 1.4.2
>
>
> Provide ability to move master components of services to different host after installation. For example, move HDFS NameNode to a different host in the cluster after the install or at some later date etc, etc.
> This is the list of Master Components to support re-assign, grouped by priority order.
> P0. Master Components to Support
> HDFS: NameNode
> HDFS: SecondaryNameNode
> MapReduce: JobTracker
> HBase: MasterServer
> P1. Master Components to Support
> Hive: Metastore
> Hive: HiveServer2
> WebHCat: Server
> P2. Master Components to Support
> Hue: Hue Server
> Oozie: Server
> P3. Master Components to Support
> Ganglia: Gangalia Collector
> Nagios: Nagios Server
> Suggested Flow
> ===============
> * Support moving a single master component at a time. For example: Services > HDFS, under the "Maintenance" dropdown, add options "Reassign NameNode" and "Reassign SNameNode"
> * After selecting the option, popup wizard walks user through the re-assign
> Step 1: List all the manual steps
> That the user must explicitly do after Step 2 (i.e. what Ambari does not perform).
> Step 2: Select the target host 
> User should be presented with a list of possible target hosts in the cluster.
> Step 3: Ask the user to reconfigure the component for this new host.
> For example select mount points for the new host before reassigning the component (Similar to each Category Section of Step 7)
> Step 4: Ask user to confirm.
> Step 5: Show the order and state of tasks with live update. For example, stopping services, installing component on target host, applying config, adjusting cluster settings for new master host, restarting services, removing old master component (from source host).
> Step 6: Complete.



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