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92 lines
2.1 KiB
Perl
Executable File
92 lines
2.1 KiB
Perl
Executable File
#!/usr/bin/env perl -w
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# -*- perl -*-
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# vim: ft=perl
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=head1 NAME
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snmp__memory_openwrt - Munin plugin to monitor the memory usage of an OpenWrt
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device.
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=head1 APPLICABLE SYSTEMS
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OpenWrt devices which have snmpd installed.
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=head1 CONFIGURATION
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As a rule SNMP plugins need site specific configuration. The default
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configuration (shown here) will only work on insecure sites/devices.
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[snmp_*]
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env.version 2
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env.community public
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In general SNMP is not very secure at all unless you use SNMP version
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3 which supports authentication and privacy (encryption). But in any
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case the community string for your devices should not be "public".
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Please see 'perldoc Munin::Plugin::SNMP' for further configuration
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information.
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=head1 INTERPRETATION
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The total and used memory on the system.
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=head1 MIB INFORMATION
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This plugin requires support for the HOST-RESOURCES-MIB (RFC 2790). It
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reports the contents of the hrStorageSize and hrStorageUsed OIDs.
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=head1 MAGIC MARKERS
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#%# family=snmpauto
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#%# capabilities=snmpconf
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=head1 BUGS
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None known.
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=head1 AUTHOR
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Copyright (C) 2017 Hanson Wong
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Based on snmp__memory_openwrt (C) 2008 J.M.Roth
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=head1 LICENSE
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GPLv2.
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=cut
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use strict;
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use Munin::Plugin::SNMP;
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if (defined $ARGV[0] and $ARGV[0] eq 'snmpconf') {
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print "require 1.3.6.1.2.1.25.2.3.1.5.1\n";
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print "require 1.3.6.1.2.1.25.2.3.1.6.1\n";
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exit 0;
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}
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if (defined $ARGV[0] and $ARGV[0] eq "config") {
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my ($host) = Munin::Plugin::SNMP->config_session();
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print "host_name $host\n" unless ($host eq 'localhost');
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print <<'EOC';
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graph_title Memory usage
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graph_args --base 1000 -l 0
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graph_vlabel kB
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graph_category memory
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graph_info This graph shows total and used memory on the host.
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memsize.label total
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memused.label used
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memsize.info The total memory.
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memused.info The memory in use.
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memsize.draw LINE1
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memused.draw LINE2
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EOC
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exit 0;
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}
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my $session = Munin::Plugin::SNMP->session();
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print "memsize.value ", $session->get_single('1.3.6.1.2.1.25.2.3.1.5.1'), "\n";
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print "memused.value ", $session->get_single('1.3.6.1.2.1.25.2.3.1.6.1'), "\n";
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