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https://issues.apache.org/jira/browse/AMBARI-15506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henning Kropp updated AMBARI-15506:
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Fix Version/s: 2.4.0
> Support for multiple Namservices in namenode_ha_utils.py
> --------------------------------------------------------
>
> Key: AMBARI-15506
> URL: https://issues.apache.org/jira/browse/AMBARI-15506
> Project: Ambari
> Issue Type: Bug
> Components: ambari-agent
> Affects Versions: trunk
> Environment: HDFS HA
> Reporter: Henning Kropp
> Fix For: 2.4.0
>
> Attachments: AMBARI-15506, AMBARI-15506_1
>
>
> Currently Ambari does not support the definition of multiple Nameservices. It
> is always assumed {{hdfs_site\['dfs.nameservices'\]}} is just a string
> defining one nameservice.
> Multiple nameservices can be configured for exmaple to support seamless
> distcp between two HA clusters. The nameservices are defined as a comma
> separated list in {{hdfs_site\['dfs.nameservices'\]}}.
> This patch introduces the method {{get_nameservice(hdfs_site)}}, which splits
> the value into in an array and identifies the nameservice for the current
> cluster with what is set in {{hdfs_site\['dfs.namenode.shared.edits.dir'\]}}.
> By default the first nameservice is returned or empty.
> To verify the current namservice it would be preferred to use
> {{fs.defaultFS}} in {{core-site}}, but getting this config into
> {{namenode_ha_utils.py}} seems more involved.
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