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245 lines
6.8 KiB
Perl
Executable File
245 lines
6.8 KiB
Perl
Executable File
#!/usr/bin/perl -w
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=head1 NAME
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multi_snmp_querier - Munin plugin to query several SNMP hosts
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=head1 SYNOPSIS
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This plugin is meant to be called from Munin. You should at least set the
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'hosts' environment variable from Munin's configuration (i.e.
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/etc/munin/munin.conf) to specify which hosts and how to query.
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=head1 DESCRIPTION
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This plugin expects to receive the following environment variables:
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=over 4
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=item snmp_oid
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Which SNMP OID should we query on; it defaults to
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1.3.6.1.2.1.43.10.2.1.4.1.1 (total printed pages - of course, it only
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makes sense to query a printer on this ;-) ).
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Other known and useful OIDs for printers are
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1.3.6.1.2.1.43.11.1.1.9.1.1 (total number of pages printed with this
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toner cartridge), 1.3.6.1.2.1.43.11.1.1.9.1.1 (total projected
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capacity of this toner cartridge - Note that for many makers, the
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literal '-2' is returning, meaning more or less "I don't know"), You
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might also be interested in 1.3.6.1.2.1.43.11.1.1.6.1.1 (toner type
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this printer uses), although as it is a constant string and not
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indicative of any kind of value, there's no use in putting it into
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Munin (at least, not via this plugin).
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Appropriate labels will be given when Munin requests for configuration
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on the above mentioned OIDs - Of course, other OIDs will get far more
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generic labels.
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=item hosts (REQUIRED!)
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Comma-separated list of hosts to send SNMP queries to. You can specify
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SNMP port and community to each of the hosts by listing them as
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community@host:port - Community defaults to public, port defaults to
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161. The following is a valid hosts declaration:
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hosts='192.168.0.15, 192.168.0.18:162, private@192.168.0.20'
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It will query host 192.168.0.15 on port 161 with the 'private'
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community, host 192.168.0.18 on port 162 with the 'private' community
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and host 192.168.0.20 on port 161 with the 'public' community.
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=back
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=head1 DEPENDS ON
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L<Net::Ping>, L<Net::SNMP>
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=head1 SEE ALSO
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L<munin>, L<munin-node>
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=head1 TO DO
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Add a mechanism to specify the labels for unknown OIDs
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=head1 AUTHOR
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Gunnar Wolf <gwolf@gwolf.org>
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=head1 COPYRIGHT
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Copyright 2008 Gunnar Wolf, Instituto de Investigaciones
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Economicas, UNAM. This plugin is Free Software; you can
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redistribute it and/or modify it under the terms of the GNU General
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Public License as published by the Free Software Foundation; version 2
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dated June, 1991, or any later version (at your choice).
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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=cut
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use strict;
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use Net::SNMP;
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use Net::Ping;
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my (%defaults, @hosts, $oid, %known_oids, $VERSION, $cmd_arg);
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$VERSION = '1.0'; # No, not a module, not used in any way - but where else? :)
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%defaults = (community => 'public',
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timeout => 1,
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port => 161,
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oid => '1.3.6.1.2.1.43.10.2.1.4.1.1');
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@hosts = get_hosts($ENV{hosts});
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$oid = $ENV{snmp_oid} || $defaults{oid};
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%known_oids = ('1.3.6.1.2.1.43.10.2.1.4.1.1' =>
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{ title => 'Pages',
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vlabel => 'Printed pages',
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category => 'printing',
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info => 'Returns the total number of printed pages per defined printer',
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total => 'Total',
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units => 'pages'
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},
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'1.3.6.1.2.1.43.11.1.1.8.1.1' =>
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{ title => 'Total projected capacity of this cartridge',
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vlabel => 'Total capacity',
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category => 'printing',
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info => 'Returns the total projected capacity (in pages) of '.
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'the currently installed cartridge',
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total => 'Total',
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units => 'pages'
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},
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'1.3.6.1.2.1.43.11.1.1.9.1.1' =>
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{ title => 'Pages printed with this cartridge',
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vlabel => 'Printed pages',
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category => 'printing',
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info => 'Returns the total number of printed pages per ' .
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'defined printer with the current cartridge',
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total => 'Total',
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units => 'pages'
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},
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'default' =>
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{ title => "Results for SNMP OID $oid",
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vlabel => 'units',
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category => 'Other',
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info => "Results for SNMP OID $oid",
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total => 'Total',
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units => 'units'
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}
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);
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die "Hosts not set - cannot continue" unless @hosts;
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$cmd_arg = $ARGV[0] || '';
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if($cmd_arg eq "config") {
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my $labels = $known_oids{$oid} || $known_oids{default};
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# See http://munin.projects.linpro.no/wiki/HowToWritePlugins for
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# explanation on the following fields
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print "graph_title $labels->{title}\n";
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print "graph_args --base 1000 -l 0\n";
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print "graph_vlabel $labels->{vlabel}\n";
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print "graph_scale no\n";
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print "graph_category $labels->{category}\n";
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print "graph_info $labels->{info}\n";
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print "graph_total $labels->{total}\n";
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for my $host (@hosts) {
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my $addr = host_label_for($host->{addr});
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print "${addr}_pages.label $addr\n";
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print "${addr}_pages.draw AREA\n";
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print "${addr}_pages.type DERIVE\n";
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print "${addr}_pages.info $labels->{units} per minute\n";
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}
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exit 0;
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} elsif ($cmd_arg eq 'autoconf') {
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print "yes\n";
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exit 0;
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}
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for my $host (@hosts) {
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my ($data, $addr);
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$data = get_value_for($host);
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$addr = host_label_for($host->{addr});
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# We only use N/A as an internal marker - It would just confuse RRD.
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next if $data eq 'N/A';
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print "${addr}_pages.value $data\n";
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}
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exit 0;
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sub ck_alive{
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my ($host, $ping);
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$host = shift;
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$ping = Net::Ping->new("tcp", 1);
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$ping->ping($host);
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}
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sub get_hosts {
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# Hosts are defined in the 'hosts' environment variable. It's a list of
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# hosts (and optionally ports) - We parse the list and arrange it neatly
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# to be easily consumed.
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my ($hostsdef, @hosts);
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$hostsdef = shift;
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for my $host (split(/,/, $hostsdef)) {
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$host =~ s/\s//g;
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$host =~ /^(?:(.*)@)?
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([^:]+)
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(?::(\d+))?$/x;
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push @hosts, {community => $1 || $defaults{community},
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addr => $2,
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port => $3 || $defaults{port} };
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}
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return @hosts;
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}
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sub get_value_for {
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my ($host, $snmp, $data);
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$host = shift;
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ck_alive($host->{addr}) or return 'N/A';
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$snmp = setup_snmp($host);
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$data = $snmp->get_request($oid);
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return 'N/A' unless $data->{$oid};
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return $data->{$oid};
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}
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sub setup_snmp {
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my ($host, $session, $error);
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$host = shift;
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($session, $error) = Net::SNMP->session( -hostname => $host->{addr},
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-port => $host->{port},
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-community => $host->{community},
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-timeout => $defaults{timeout} );
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$session or die "Error before query $host->{addr}:$host->{port}: $error";
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return $session;
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}
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sub host_label_for {
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my ($addr);
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$addr = 'src_' . shift;
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$addr =~ s/\./_/g; # Periods not allowed in variable names
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return $addr;
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}
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# for Munin Plugin Gallery
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# graph_category printing
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