#!/usr/bin/perl -w

=head1 NAME

Munin plugin snmp__sentry is written to monitor the Sentry line of Power Distribution Units (PDU) offered by Server Technology.

This plugin currently assumes a 3-phase PDU.

=head1 AUTHOR

Danny Howard <dannyman@toldme.com>

This plugin was created on the behalf of Quantifind, Inc.  http://www.quantifind.com

=head1 LICENSE

BSD

=head1 MAGIC MARKERS

  #%# family=snmpauto
  #%# capabilities=snmpconf

=head1 EXAMPLE MIB

$ wget ftp://ftp.servertech.com/pub/SNMP/sentry3/Sentry3.mib
$ snmpwalk -c public -v 2c -M +. -m +Sentry3-MIB 192.168.whatevs .1.3.6.1.4.1.1718.3.2.2
Sentry3-MIB::infeedID.1.1 = STRING: AA
Sentry3-MIB::infeedID.1.2 = STRING: AB
Sentry3-MIB::infeedID.1.3 = STRING: AC
Sentry3-MIB::infeedName.1.1 = STRING: Master_X
Sentry3-MIB::infeedName.1.2 = STRING: Master_Y
Sentry3-MIB::infeedName.1.3 = STRING: Master_Z
Sentry3-MIB::infeedCapabilities.1.1 = BITS: C6 00 onSense(0) loadSense(1) voltageSense(5) powerSense(6) 
Sentry3-MIB::infeedCapabilities.1.2 = BITS: C6 00 onSense(0) loadSense(1) voltageSense(5) powerSense(6) 
Sentry3-MIB::infeedCapabilities.1.3 = BITS: C6 00 onSense(0) loadSense(1) voltageSense(5) powerSense(6) 
Sentry3-MIB::infeedStatus.1.1 = INTEGER: on(1)
Sentry3-MIB::infeedStatus.1.2 = INTEGER: on(1)
Sentry3-MIB::infeedStatus.1.3 = INTEGER: on(1)
Sentry3-MIB::infeedLoadStatus.1.1 = INTEGER: normal(0)
Sentry3-MIB::infeedLoadStatus.1.2 = INTEGER: normal(0)
Sentry3-MIB::infeedLoadStatus.1.3 = INTEGER: normal(0)
Sentry3-MIB::infeedLoadValue.1.1 = INTEGER: 717 hundredth Amps
Sentry3-MIB::infeedLoadValue.1.2 = INTEGER: 708 hundredth Amps
Sentry3-MIB::infeedLoadValue.1.3 = INTEGER: 787 hundredth Amps
Sentry3-MIB::infeedLoadHighThresh.1.1 = INTEGER: 16 Amps
Sentry3-MIB::infeedLoadHighThresh.1.2 = INTEGER: 16 Amps
Sentry3-MIB::infeedLoadHighThresh.1.3 = INTEGER: 16 Amps
Sentry3-MIB::infeedOutletCount.1.1 = INTEGER: 10
Sentry3-MIB::infeedOutletCount.1.2 = INTEGER: 10
Sentry3-MIB::infeedOutletCount.1.3 = INTEGER: 10
Sentry3-MIB::infeedCapacity.1.1 = INTEGER: 20 Amps
Sentry3-MIB::infeedCapacity.1.2 = INTEGER: 20 Amps
Sentry3-MIB::infeedCapacity.1.3 = INTEGER: 20 Amps
Sentry3-MIB::infeedVoltage.1.1 = INTEGER: 2055 tenth Volts
Sentry3-MIB::infeedVoltage.1.2 = INTEGER: 2034 tenth Volts
Sentry3-MIB::infeedVoltage.1.3 = INTEGER: 2052 tenth Volts
Sentry3-MIB::infeedPower.1.1 = INTEGER: 726 Watts
Sentry3-MIB::infeedPower.1.2 = INTEGER: 809 Watts
Sentry3-MIB::infeedPower.1.3 = INTEGER: 874 Watts
Sentry3-MIB::infeedApparentPower.1.1 = INTEGER: 793 Volt-Amps
Sentry3-MIB::infeedApparentPower.1.2 = INTEGER: 876 Volt-Amps
Sentry3-MIB::infeedApparentPower.1.3 = INTEGER: 941 Volt-Amps
Sentry3-MIB::infeedPowerFactor.1.1 = INTEGER: 92 hundredths
Sentry3-MIB::infeedPowerFactor.1.2 = INTEGER: 92 hundredths
Sentry3-MIB::infeedPowerFactor.1.3 = INTEGER: 93 hundredths
Sentry3-MIB::infeedCrestFactor.1.1 = INTEGER: 18 tenths
Sentry3-MIB::infeedCrestFactor.1.2 = INTEGER: 17 tenths
Sentry3-MIB::infeedCrestFactor.1.3 = INTEGER: 17 tenths
Sentry3-MIB::infeedEnergy.1.1 = INTEGER: 762 tenth Kilowatt-Hours
Sentry3-MIB::infeedEnergy.1.2 = INTEGER: 913 tenth Kilowatt-Hours
Sentry3-MIB::infeedEnergy.1.3 = INTEGER: 928 tenth Kilowatt-Hours
Sentry3-MIB::infeedReactance.1.1 = INTEGER: capacitive(1)
Sentry3-MIB::infeedReactance.1.2 = INTEGER: capacitive(1)
Sentry3-MIB::infeedReactance.1.3 = INTEGER: capacitive(1)
Sentry3-MIB::infeedPhaseVoltage.1.1 = INTEGER: 2055 tenth Volts
Sentry3-MIB::infeedPhaseVoltage.1.2 = INTEGER: 2034 tenth Volts
Sentry3-MIB::infeedPhaseVoltage.1.3 = INTEGER: 2052 tenth Volts
Sentry3-MIB::infeedPhaseCurrent.1.1 = INTEGER: 386 hundredth Amps
Sentry3-MIB::infeedPhaseCurrent.1.2 = INTEGER: 431 hundredth Amps
Sentry3-MIB::infeedPhaseCurrent.1.3 = INTEGER: 459 hundredth Amps
Sentry3-MIB::infeedCapacityUsed.1.1 = INTEGER: 358 tenth percentage
Sentry3-MIB::infeedCapacityUsed.1.2 = INTEGER: 354 tenth percentage
Sentry3-MIB::infeedCapacityUsed.1.3 = INTEGER: 393 tenth percentage
Sentry3-MIB::infeedLineID.1.1 = STRING: A:X
Sentry3-MIB::infeedLineID.1.2 = STRING: A:Y
Sentry3-MIB::infeedLineID.1.3 = STRING: A:Z
Sentry3-MIB::infeedLineToLineID.1.1 = STRING: A:X-Y
Sentry3-MIB::infeedLineToLineID.1.2 = STRING: A:Y-Z
Sentry3-MIB::infeedLineToLineID.1.3 = STRING: A:Z-X
Sentry3-MIB::infeedPhaseID.1.1 = STRING: A:X-Y
Sentry3-MIB::infeedPhaseID.1.2 = STRING: A:Y-Z
Sentry3-MIB::infeedPhaseID.1.3 = STRING: A:Z-X

=cut

use strict;
use Munin::Plugin::SNMP;

if (defined $ARGV[0] and $ARGV[0] eq "snmpconf") {
        print "require 1.3.6.1.4.1.1718.3.2.2.1\n";
        exit 0;
}

my $session = Munin::Plugin::SNMP->session(-translate =>
                                           [ -timeticks => 0x0 ]);

my $sentry_h = $session->get_hash (
	-baseoid	=> ".1.3.6.1.4.1.1718.3.2.2.1",
	-cols		=> {
# maxcols 16 I guess
#				2	=> 'infeedID',
				3	=> 'infeedName',
#				4	=> 'infeedCapabilities',
#				5	=> 'infeedStatus',
#				6	=> 'infeedLoadStatus',
				7	=> 'infeedLoadValue',
				8	=> 'infeedLoadHighThresh',
#				9	=> 'infeedOutletCount',
				10	=> 'infeedCapacity',
#				11	=> 'infeedVoltage',
#				12	=> 'infeedPower',
#				13	=> 'infeedApparentPower',
				14	=> 'infeedPowerFactor',
				15	=> 'infeedCrestFactor',
#				16	=> 'infeedEnergy',
#				17	=> 'infeedReactance',
#				18	=> 'infeedPhaseVoltage',
#				19	=> 'infeedPhaseCurrent',
#				20	=> 'infeedCapacityUsed',
#				21	=> 'infeedLineID',
#				22	=> 'infeedLineToLineID',
#				23	=> 'infeedPhaseID',

			}
	);

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 "
multigraph power_amps_drawn
graph_title Power Draw in Amps
graph_args --lower-limit 0
graph_vlabel Amps
graph_category pdu
graph_scale no
graph_info This shows the amperage drawn on your PDU. Per NEC, a PDU should not sustain 80% of its maximum circuit capacity for more than three hours.

";

    foreach my $k ( keys %{$sentry_h} ) {
    	my $infeedName = $sentry_h->{$k}->{'infeedName'};
    	my $critical	= ($sentry_h->{$k}->{'infeedCapacity'})*.9;	# 90% of capacity
    	my $warning	= $sentry_h->{$k}->{'infeedLoadHighThresh'};	# 80% of capacity
    	
    	print "$infeedName.critical $critical\n";
    	print "$infeedName.draw LINE1\n";
    	print "$infeedName.label $infeedName\n";
    	print "$infeedName.min 0\n";
    	print "$infeedName.type GAUGE\n";
    	print "$infeedName.warning $warning\n";
    }

        print "
multigraph power_power_factor
graph_title Power Factor
graph_args --lower-limit 0
graph_vlabel Power Factor
graph_category pdu
graph_scale no
graph_info Power factor represents the efficiency of the components connected to the circuit. Power factor declines as components age, increasing the overall load on the circuit.

";

    foreach my $k ( keys %{$sentry_h} ) {
    	my $infeedName = $sentry_h->{$k}->{'infeedName'};
    	
    	print "$infeedName.draw LINE1\n";
    	print "$infeedName.label $infeedName\n";
    	print "$infeedName.type GAUGE\n";
    }

        print "
multigraph power_crest_factor
graph_title Crest Factor
graph_args --lower-limit 0
graph_vlabel Crest Factor
graph_category pdu
graph_scale no
graph_info Crest factor relates the peak value of a signal to its root mean square value. For three-phase AC, a crest factor of 1.732 is expected. Low crest factor may indicate UPS overclipping and crest factors over 5 degrade monitoring accuracy.

";

    foreach my $k ( keys %{$sentry_h} ) {
    	my $infeedName = $sentry_h->{$k}->{'infeedName'};
    	
    	print "$infeedName.draw LINE1\n";
    	print "$infeedName.label $infeedName\n";
    	print "$infeedName.type GAUGE\n";
    }

    exit 0;
}

print "multigraph power_amps_drawn\n";
foreach my $k ( keys %{$sentry_h} ) {
	my $infeedName = $sentry_h->{$k}->{'infeedName'};
	my $amps = $sentry_h->{$k}->{'infeedLoadValue'};
	if ( $amps ) {
		$amps = $amps * .01;
	} else {
		$amps = 'U';
	}
	print "$infeedName.value $amps\n";
}

print "multigraph power_power_factor\n";
foreach my $k ( keys %{$sentry_h} ) {
	my $infeedName = $sentry_h->{$k}->{'infeedName'};
	my $pf = $sentry_h->{$k}->{'infeedPowerFactor'};
	if ( $pf ) {
		$pf = $pf * .01;
	} else {
		$pf = 'U';
	}
	print "$infeedName.value $pf\n";
}

print "multigraph power_crest_factor\n";
foreach my $k ( keys %{$sentry_h} ) {
	my $infeedName = $sentry_h->{$k}->{'infeedName'};
	my $crest = $sentry_h->{$k}->{'infeedCrestFactor'};
	if ( $crest ) {
		$crest = $crest * .1;
	} else {
		$crest = 'U';
	}
	print "$infeedName.value $crest\n";
}