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From "Henning Kropp (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-15506) Support for multiple Namservices in namenode_ha_utils.py
Date Tue, 22 Mar 2016 09:06:25 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-15506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Henning Kropp updated AMBARI-15506:
-----------------------------------
    Status: Patch Available  (was: Open)

> 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
>         Attachments: AMBARI-15506
>
>
> 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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