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 => <hostname>
- jobtracker => <hostname>
- socksproxy => <hostname>
- 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 ()
datanode_dead_list ()
datanode_decom_list ()
- Description
-
Returns a list of the currently decommissioning DataNodes.
- Return values
-
Array containing hostnames.
tasktracker_live_list ()
- Description
-
Returns a list of the current live TaskTrackers.
- Return values
-
Array containing hostnames.
tasktracker_live_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
Copyright (C) 2012 Charles Wimmer. This program is free software; you can redistribute and/or modify program under the same terms as Perl itself or in terms of Gnu General Public license v2 or later.