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Date: Wed, 26 Oct 2011 20:23:33 +0000 (UTC)
From: "Todd Lipcon (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HDFS-2487) HA: Administrative CLI to control HA
 daemons
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     [ https://issues.apache.org/jira/browse/HDFS-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon updated HDFS-2487:
------------------------------

    Attachment: hdfs-2487.txt

Here's a patch which adds an HAAdmin command line tool.

Its usage output:
{code}
Usage: java HAAdmin
    [-transitionToActive <host:port>]
    [-transitionToStandby <host:port>]
    [-checkHealth <host:port>]
    [-help <command>]
{code}

Notes:
- I didn't add it to the bin/hadoop wrapper script since this is mostly going to be used as a testing tool for now. Actual failovers will be done through the failover controller.
- Similarly, I didn't try to integrate this with configuration for NN addresses or anything - this is a patch for common rather than HDFS. I'll move the JIRA to common.
                
> HA: Administrative CLI to control HA daemons
> --------------------------------------------
>
>                 Key: HDFS-2487
>                 URL: https://issues.apache.org/jira/browse/HDFS-2487
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs client
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2487.txt
>
>
> We'll need to have some way of controlling the HA nodes while they're live, probably by adding some more commands to dfsadmin.

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