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snmp__screenos: first version of a plugin to monitor Juniper ScreenOS Resources

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Right now this produces two graphs: memory and session allocation. CPU
time will be added shortly.
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Diego Elio Pettenò 2012-08-28 13:58:55 -07:00
parent bcaee8ef9c
commit d7e8315462
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plugins/snmp/snmp__screenos Executable file
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#!/usr/bin/perl -w
# -*- perl -*-
=head1 NAME
snmp__screenos_ - SNMP plugin to monitor Juniper ScreenOS based routers
=head1 APPLICABLE SYSTEMS
This has been developed against a Juniper SSG5-Serial router, but
should work with any ScreenOS-based router as manufactured by Juniper.
Using a command such as "munin-node-configure --snmp
switch.langfeldt.net --snmpversion 2c --snmpcommunity public | sh -x"
should identify whether this plugin can apply.
=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 MIB INFORMATION
This plugin requires NETSCREEN-RESOURCE-MIB information.
=head1 MAGIC MARKERS
#%# family=snmpauto
#%# capabilities=snmpconf
=head1 AUTHOR
Copyright (C) 2012 Diego Elio Pettenò.
=head1 LICENSE
GPLv2
=cut
use strict;
use Munin::Plugin;
use Munin::Plugin::SNMP;
# This corresponds to NETSCREEN-SMI::netscreenResource
my $oidBase = '1.3.6.1.4.1.3224.16';
my $oidMemAllocate = $oidBase . '.2.1';
my $oidMemLeft = $oidBase . '.2.2';
my $oidSessAllocate = $oidBase . '.3.2';
my $oidSessMaximum = $oidBase . '.3.3';
my $oidSessFailed = $oidBase . '.3.4';
if (defined $ARGV[0] and $ARGV[0] eq "snmpconf") {
print "require $oidBase.[23].[13].0";
}
my $session = Munin::Plugin::SNMP->session();
my $data = $session->get_entries(-columns => [ $oidMemAllocate,
$oidMemLeft,
$oidSessAllocate,
$oidSessMaximum,
$oidSessFailed ]);
if ($ARGV[0] and $ARGV[0] eq "config") {
my ($host) = Munin::Plugin::SNMP->config_session();
my $memTotal = $data->{"$oidMemAllocate.0"} + $data->{"$oidMemLeft.0"};
# this is the closet I can get to the yellow/red on the ScreenOS
# interface.
my $memWarning = int($memTotal * 0.75 + 0.5);
my $memCritical = int($memTotal * 0.85 + 0.5);
my $sessWarning = int($data->{"$oidSessMaximum.0"} * 0.75 + 0.5);
my $sessCritical = int($data->{"$oidSessMaximum.0"} * 0.85 + 0.5);
print <<END;
host_name $host
multigraph screenos_memory
graph_title Memory allocation
graph_vlabel bytes
graph_args --base 1024
graph_category system
memory.label Memory
memory.min 0
memory.max $memTotal
memory.warning $memWarning
memory.critical $memCritical
multigraph screenos_sessions
graph_title Sessions allocation
graph_vlabel Count
graph_category system
sessions.label Active Sessions
sessions.min 0
sessions.max $data->{"$oidSessMaximum.0"}
sessions.warning $sessWarning
sessions.critical $sessCritical
failed.label Failed Sessions
failed.min 0
failed.critical 1
END
exit 0;
}
print <<END;
multigraph screenos_memory
memory.value $data->{"$oidMemAllocate.0"}
multigraph screenos_sessions
sessions.value $data->{"$oidSessAllocate.0"}
failed.value $data->{"$oidSessFailed.0"}
END