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https://issues.apache.org/jira/browse/AMBARI-1513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeff Sposetti updated AMBARI-1513:
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Fix Version/s: 1.3.0
> 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: 1.3.0
>
>
> 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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