120 lines
3.5 KiB
Perl
120 lines
3.5 KiB
Perl
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#!/usr/bin/perl -Wall
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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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, USA.
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#
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#
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# check_traceroute is designed to generate and alarm if a traceroute exceeds
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# a certain number of hops. This is useful in cases where a multi-homed
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# network looses a connection and can still ping the remote end because
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# traffic is being re-routed out through the redundent connection.
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#
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# check_traceroute v0.1
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# By mp@xmission.com
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#
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# Thanks to Sebastian Hetze, Linux Information Systems AG who wrote the
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# excellent check_apache plugin, which this plugin was modeled after.
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#
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#############################################################################
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use strict;
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use Net::Traceroute;
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use Getopt::Long;
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my $version = "v0.1";
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my $opt_v;
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my $opt_t=undef; #for usage () unless ($opt_t) to work right
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my $opt_help;
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my $opt_w;
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my $opt_c;
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my %ERRORS = ('UNKNOWN' , '-1',
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'OK' , '0',
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'WARNING', '1',
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'CRITICAL', '2');
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# Set this to whatever you like, but make sure you don't hang Nagios
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# for too long.
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my $timeout = "30";
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GetOptions
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("v" => \$opt_v, "t=s" => \$opt_t,
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"help" => \$opt_help, "h" => \$opt_help,
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"w=i" => \$opt_w, "c=i" => \$opt_c
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);
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if ($opt_v) {
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print "\nThis is check_traceroute version $version\n";
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print "\n";
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print "Please report errors to mp\@xmission\.com";
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print "\n\n";
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}
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#subs
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sub print_help () {
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print "\n\nThis is check_traceroute.pl. It is designed to send an alert\n";
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print "to Nagios if a route to a particular destination exceeds a\n";
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print "certain number of hops.\n\n";
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print "Usage:\n";
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print "\n";
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print "--help Display this help.\n";
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print "-v Display the version number of check_traceroute.\n";
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print "-t Host that you wish to traceroute to.\n";
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print "-w Number of hops before Nagios generates a WARNING.\n";
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print "-c Number of hops before Nagios generates a CRITICAL.\n";
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}
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sub usage() {
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print "check_traceroute -t <host> [-w <warning>] [-c <critical>]\n";
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}
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sub do_check() {
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if ($opt_t) {
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unless ($opt_w && $opt_c) {die "You must specify thresholds using -c and -w\n";}
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my $tr = Net::Traceroute->new(host=>"$opt_t") || die "Can't init traceroute!\n";
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if($tr->found) {
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my $hops = $tr->hops;
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if($hops > $opt_w) {
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print "Warning: $opt_t is $hops hops away!\n";
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exit $ERRORS{'WARNING'};
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}
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elsif($hops > $opt_c) {
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print "Critical: $opt_t is $hops hops away!\n";
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exit $ERRORS{'CRITICAL'};
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}
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else {
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print "OK: $opt_t is $hops hops away\n";
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exit $ERRORS{'OK'};
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}
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}
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else {
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print "Couldn't locate host $opt_t!\n";
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exit $ERRORS{'UNKNOWN'};
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}
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}
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}
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# Must be placed at the end for -Wall to compile cleanly, blech
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if ($opt_help) {
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print_help();
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}
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usage() unless ($opt_t);
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#timeoutes
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$SIG{'ALRM'} = sub {
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print ("ERROR: No response from $opt_t (timeout) in $timeout seconds\n");
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exit $ERRORS{"UNKNOWN"};
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};
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alarm($timeout);
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do_check();
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