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.