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Administration Modules for Hadoop

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README.md

NAME

Hadoop::Admin - Module for administration of Hadoop clusters

SYNOPSIS

use Hadoop::Admin; 

my $cluster=Hadoop::Admin->new({
  'namenode'          => 'namenode.host.name',
  'jobtracker'        => 'jobtracker.host.name',
});

print $cluster->datanode_live_list();

DESCRIPTION

This module connects to Hadoop servers using http. The JMX Proxy Servlet is queried for specific mbeans.

This module requires Hadoop the changes in https://issues.apache.org/jira/browse/HADOOP-7144. They are available in versions 0.20.204.0, 0.23.0 or later.

INTERFACE FUNCTIONS

new ()

  • Description

Create a new instance of the Hadoop::Admin class.

The method requires a hash containing at minimum the namenode's, and the jobtracker's hostnames. Optionally, you may provide a socksproxy for the http connection.

Creation of this object will cause an immediate querry to both the NameNode and JobTracker.

  • namenode =>
  • jobtracker =>
  • socksproxy =>
  • Returns newly created object.

get_namenode ()

  • Description

Returns the JobTracker from instantiation

get_namenode ()

  • Description

Returns the JobTracker from instantiation

get_namenode ()

  • Description

Returns the Socks Proxy from instantiation

datanode_live_list ()

  • Description

Returns a list of the current live DataNodes.

  • Return values

Array containing hostnames.

datanode_dead_list ()

  • Description

Returns a list of the current dead DataNodes.

  • Return values

Array containing hostnames.

datanode_decom_list ()

  • Description

Returns a list of the currently decommissioning DataNodes.

  • Return values

Array containing hostnames.

nodemanager_live_list ()

  • Description

Returns a list of the current live NodeManagers.

  • Return values

Array containing hostnames.

tasktracker_live_list ()

  • Description

Returns a list of the current live TaskTrackers.

  • Return values

Array containing hostnames.

tasktracker_blacklist_list ()

  • Description

Returns a list of the current blacklisted TaskTrackers.

  • Return values

Array containing hostnames.

tasktracker_live_list ()

  • Description

Returns a list of the current graylisted TaskTrackers.

  • Return values

Array containing hostnames.

KNOWN BUGS

None known at this time. Please log issues at:

https://github.com/cwimmer/hadoop-admin/issues

AVAILABILITY

Source code is available on GitHub:

https://github.com/cwimmer/hadoop-admin

Module available on CPAN as Hadoop::Admin:

http://search.cpan.org/~cwimmer/

AUTHOR

This software is Copyright (c) 2012 by Charles A. Wimmer.

This is free software, licensed under:

The (three-clause) BSD License

The BSD License

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution. 

* Neither the name of Charles A. Wimmer nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission. 

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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