Chris Williams > POE-Component-Server-NRPE > POE::Component::Server::NRPE

Download:
POE-Component-Server-NRPE-0.18.tar.gz

Dependencies

Annotate this POD

Website

View/Report Bugs
Module Version: 0.18   Source  

NAME ^

POE::Component::Server::NRPE - A POE Component implementation of NRPE Daemon.

VERSION ^

version 0.18

SYNOPSIS ^

  use strict;
  use POE;
  use POE::Component::Server::NRPE;
  use POE::Component::Server::NRPE::Constants qw(NRPE_STATE_OK);

  my $port = 5666;

  my $nrped = POE::Component::Server::NRPE->spawn(
        port => $port;
  );

  $nrped->add_command( command => 'meep', program => \&_meep );

  $poe_kernel->run();
  exit 0;

  sub _meep {
        print STDOUT "OK meep\n";
        exit NRPE_STATE_OK;
  }

DESCRIPTION ^

POE::Component::Server::NRPE is a POE component that implements an NRPE (Nagios Remote Plugin Executor) daemon supporting both version 1 and version 2 protocols. It also supports SSL encryption using Net::SSLeay and a hacked version of POE::Component::SSLify.

Access is controlled by specifying Net::Netmask objects to the constructor. The default behaviour is to allow access from any IP address.

CONSTRUCTOR ^

spawn

Takes a number of parameters, which are optional:

  'address', bind the listening socket to a particular address, default is IN_ADDR_ANY;
  'port', specify a port to listen on, default is 5666;
  'version', the NRPE protocol version to use, default is 2;
  'usessl', set this to 0 to disable SSL support with NRPE Version 2, default is 1;
  'time_out', specify a time out in seconds for socket connections and commands, default is 10;
  'access', an arrayref of Net::Netmask objects that will be granted access, default is 'any';

Returns a POE::Component::Server::NRPE object.

METHODS ^

session_id

Returns the POE::Session ID of the component.

shutdown

Terminates the component. Shuts down the listener and disconnects connected clients.

getsockname

Access to the POE::Wheel::SocketFactory method of the underlying listening socket.

add_command

This will add a command that can be run. Takes a number of parameters:

  'command', a label for the command. This is what clients will request, mandatory;
  'program', the program to run. Can be a coderef, mandatory;
  'args', the command line arguments to pass to the above program, must be an arrayref;

The 'command' should behave like an NRPE plugin: It should print a status message to STDOUT and exit() with the test's outcome. POE::Component::Server::NRPE::Constants defines constants for the valid exit() values.

add_command() eturns 1 if successful, undef otherwise.

del_command

Removes a previously defined command. Takes one argument, the previously defined label to remove.

Returns 1 if successful, undef otherwise.

INPUT EVENTS ^

These are events from other POE sessions that our component will handle:

register_command

This will register the sending session with given command. Takes a number of parameters:

   'command', a label for the command. This is what clients will request, mandatory;
   'event', the name of the event in the registering session that will be triggered, mandatory;
   'context', a scalar containing any reference data that your session demands;

The component will increment the refcount of the calling session to make sure it hangs around for events. Therefore, you should use either unregister_command or shutdown to terminate registered sessions.

Whenever clients request the given command, the component will send the indicated event to the registering session with the following parameters:

  ARG0, a unique id of the client;
  ARG1, the context ( if any );

Your session should then do any necessary processing and use return_result event to return the status and output to the component.

unregister_command

This will unregister the sending session with the given command. Takes one parameter:

   'command', a previously registered command, mandatory;
return_result

After processing a command your session must use this event to return the status and output to the component. Takes three values:

   The unique id of the client;
   The status which should be 0, 1 , 2 or 3, indicating OK, WARNING, CRITICAL or UNKNOWN, respectively;
   A string with some meaning output;

   $kernel->post( 'nrped', 'return_result', $id, 0, 'OK Everything was cool' );
shutdown

Terminates the component. Shuts down the listener and disconnects connected clients.

CAVEATS ^

Due to problems with Net::SSLeay mixing of client and server SSL is not encouraged unless fork() is employed.

TODO ^

Add a logging capability.

SEE ALSO ^

POE

POE::Component::SSLify

http://www.nagios.org/

KUDOS ^

This module uses code derived from http://www.stic-online.de/stic/html/nrpe-generic.html Copyright (C) 2006, 2007 STIC GmbH, http://www.stic-online.de

AUTHORS ^

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2012 by Chris Williams, Rocco Caputo, Olivier Raginel and STIC GmbH.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

syntax highlighting: