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#!/usr/bin/perl -w # -*- perl -*- # vim: ft=perl =head1 NAME snmp__users - Munin plugin to check the number of logged in users on an SNMP device. =head1 APPLICABLE SYSTEMS Any SNMP-capable device that reports the HOST-RESOURCES-MIB::hrSystemNumUsers.0 OID. =head1 CONFIGURATION As a rule SNMP plugins need site specific configuration. The default configuration (shown here) will only work on insecure sites/devices. [snmp_*] env.version 2 env.community public In general SNMP is not very secure at all unless you use SNMP version 3 which supports authentication and privacy (encryption). But in any case the community string for your devices should not be "public". Please see 'perldoc Munin::Plugin::SNMP' for further configuration information. =head1 INTERPRETATION The number of user sessions for which this host is storing state information. A session is a collection of processes requiring a single act of user authentication and possibly subject to collective job control. =head1 MIB INFORMATION This plugin requires support for the HOST-RESOURCES-MIB (RFC 2790). It reports the contents of the hrSystemNumUsers.0 OID. =head1 MAGIC MARKERS #%# family=snmpauto #%# capabilities=snmpconf =head1 BUGS None known. =head1 AUTHOR Copyright (C) 2004 Jimmy Olsen, Dagfinn Ilmari Mannsåker Documented and updated to use Munin::Plugin::SNMP by Matthew Boyle. =head1 LICENSE GPLv2. =cut use strict; use Munin::Plugin::SNMP; if (defined $ARGV[0] and $ARGV[0] eq 'snmpconf') { # .iso.org.dod.internet.mgmt.mib-2.host.hrSystem.hrSystemNumUsers.0 print "require 1.3.6.1.2.1.25.1.5.0 [0-9]\n"; # Number exit 0; } if (defined $ARGV[0] and $ARGV[0] eq "config") { my ($host) = Munin::Plugin::SNMP->config_session(); print "host_name $host\n" unless $host eq 'localhost'; print <<"EOC"; graph_title Number of users graph_args --base 1000 -l 0 graph_vlabel number of users graph_scale no graph_category system graph_info This graph shows the number of users currently logged in to the system. users.label users users.draw LINE2 users.info Number of users EOC exit 0; } my $session = Munin::Plugin::SNMP->session(); print "users.value ", $session->get_single('1.3.6.1.2.1.25.1.5.0'), "\n";