#!/usr/bin/perl =head1 NAME snmp__netapp_diskusage_ - Munin plugin to retrieve file systems usage on NetApp storage appliances. =head1 APPLICABLE SYSTEMS File systems usage stats should be reported by any NetApp storage appliance with SNMP agent daemon activated. See na_snmp(8) for details. =head1 CONFIGURATION Unfortunately, SNMPv3 is not fully supported on all NetApp equipments. For this reason, this plugin will use SNMPv2 by default, which is insecure because it doesn't encrypt the community string. The following parameters will help you get this plugin working : [snmp_*] env.community MyCommunity If your community name is 'public', you should really worry about security and immediately reconfigure your appliance. Please see 'perldoc Munin::Plugin::SNMP' for further configuration. =head1 INTERPRETATION The plugin reports file systems usage. This can help you monitoring file systems usage in a given period of time. =head1 MIB INFORMATION This plugin requires support for the NETWORK-APPLIANCE-MIB issued by Network Appliance. It reports the content of the DfEntry OID. =head1 MAGIC MARKERS #%# family=snmpauto #%# capabilities=snmpconf =head1 VERSION v1.0 - 06/22/2009 14:05:03 CEST Initial revision =head1 AUTHOR This plugin is copyright (c) 2009 by Guillaume Blairon. NetApp is a registered trademark and Network Appliance is a trademark of Network Appliance, Inc. in the U.S. and other countries. =head1 BUGS This plugin hasn't be tested on many hardware. If you encounter bugs, please report any to Guillaume Blairon ELE. =head1 LICENSE GPLv2 or (at your option) any later version. =cut use strict; use warnings; use Munin::Plugin::SNMP; use vars qw($DEBUG); $DEBUG = $ENV{'MUNIN_DEBUG'}; my @palette = #Better colours from munin 1.3.x #Greens Blues Oranges Dk yel Dk blu Purple Lime Reds Gray qw(00CC00 0066B3 FF8000 FFCC00 330099 990099 CCFF00 FF0000 808080 008F00 00487D B35A00 B38F00 6B006B 8FB300 B30000 BEBEBE 80FF80 80C9FF FFC080 FFE680 AA80FF EE00CC FF8080 666600 FFBFFF 00FFCC CC6699 999900); my %oids = ( # - dfHigh.* : 32 most significant bits counters # - dfLow.* : 32 least significant bits counters dfHighTotalKBytes => '1.3.6.1.4.1.789.1.5.4.1.14.', dfLowTotalKBytes => '1.3.6.1.4.1.789.1.5.4.1.15.', dfHighUsedKBytes => '1.3.6.1.4.1.789.1.5.4.1.16.', dfLowUsedKBytes => '1.3.6.1.4.1.789.1.5.4.1.17.', dfHighAvailKBytes => '1.3.6.1.4.1.789.1.5.4.1.18.', dfLowAvailKBytes => '1.3.6.1.4.1.789.1.5.4.1.19.', ); sub to_32bit_int { my ($l, $h) = @_; return "U" if ((!defined $l) || (!defined $h)); my $bin = unpack( 'B32', pack('N', $l) . pack('N', $h) ); return unpack( 'N', pack('B32', $bin) ); } if (defined $ARGV[0] and $ARGV[0] eq 'snmpconf') { print "number 1.3.6.1.4.1.789.1.5.6.0\n"; print "index 1.3.6.1.4.1.789.1.5.4.1.1.\n"; foreach (keys %oids) { print "require $oids{$_} [0-9]\n"; } exit 0; } my $session = Munin::Plugin::SNMP->session(); my ($host, undef, undef, $tail) = Munin::Plugin::SNMP->config_session(); my ($df_id, $name_oid); if ($tail =~ /^netapp_diskusage_(\d)*$/) { $df_id = $1; $name_oid = '1.3.6.1.4.1.789.1.5.4.1.2.' . $df_id; } else { die "Couldn't understand what I'm supposed to monitor"; } if (defined $ARGV[0] and $ARGV[0] eq "config") { my $df_name = $session->get_single($name_oid); print "host_name $host\n" unless $host eq 'localhost'; print "graph_title $host disk usage on $df_name\n"; print "graph_args --base 1024 --lower-limit 0\n"; print "graph_vlabel bytes\n"; print "graph_category disk\n"; print "graph_info This graph shows the disk usage for $df_name on NetApp host $host\n"; print "graph_order used avail total\n"; print "used.info The total disk space in KBytes that is in use on the $df_name file system.\n"; print "used.type GAUGE\n"; print "used.draw AREA\n"; print "used.label Used\n"; print "used.cdef used,1024,*\n"; print "used.min 0\n"; print "used.colour $palette[1]\n"; print "avail.info The total disk space in KBytes that is free for use on the $df_name file system.\n"; print "avail.type GAUGE\n"; print "avail.draw STACK\n"; print "avail.label Available\n"; print "avail.cdef avail,1024,*\n"; print "avail.min 0\n"; print "avail.colour $palette[3]\n"; print "total.info The total capacity in KBytes for the $df_name file system.\n"; print "total.type GAUGE\n"; print "total.draw LINE2\n"; print "total.label Total\n"; print "total.cdef total,1024,*\n"; print "total.min 0\n"; print "total.colour $palette[7]\n"; exit 0; } my $used_l = $session->get_single($oids{dfLowUsedKBytes}.$df_id); my $used_h = $session->get_single($oids{dfHighUsedKBytes}.$df_id); my $avail_l = $session->get_single($oids{dfLowAvailKBytes}.$df_id); my $avail_h = $session->get_single($oids{dfHighAvailKBytes}.$df_id); my $total_l = $session->get_single($oids{dfLowTotalKBytes}.$df_id); my $total_h = $session->get_single($oids{dfHighTotalKBytes}.$df_id); my $used = to_32bit_int($used_l, $used_h); my $avail = to_32bit_int($avail_l, $avail_h); my $total = to_32bit_int($total_l, $total_h); print "used.value $used\n"; print "avail.value $avail\n"; print "total.value $total\n"; exit 0; __END__