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#!/usr/bin/perl -w
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#
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# Copyright (c) 2010 Stéphane Urbanovski <stephane.urbanovski@ac-nancy-metz.fr>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (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
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# of 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 (or with Nagios); if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA
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#
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# $Id: $
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use strict; # should never be differently :-)
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use warnings;
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use Locale::gettext;
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use File::Basename; # get basename()
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use POSIX qw(setlocale);
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use Time::HiRes qw(time); # get microtime
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use POSIX qw(mktime);
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use Nagios::Plugin ;
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use LWP::UserAgent; # http client
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use HTTP::Request; # used by LWP::UserAgent
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use HTTP::Status; # to get http err msg
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use Data::Dumper;
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my $PROGNAME = basename($0);
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'$Revision: 1.0 $' =~ /^.*(\d+\.\d+) \$$/; # Use The Revision from RCS/CVS/SVN
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my $VERSION = $1;
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my $DEBUG = 0;
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my $TIMEOUT = 9;
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# i18n :
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setlocale(LC_MESSAGES, '');
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textdomain('nagios-plugins-perl');
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my $np = Nagios::Plugin->new(
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version => $VERSION,
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blurb => _gt('Plugin to check HAProxy stats url'),
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usage => "Usage: %s [ -v|--verbose ] -u <url> [-t <timeout>] [-U <username>] [-P <password>] [ -c|--critical=<threshold> ] [ -w|--warning=<threshold> ]",
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timeout => $TIMEOUT+1
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);
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$np->add_arg (
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spec => 'debug|d',
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help => _gt('Debug level'),
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default => 0,
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);
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$np->add_arg (
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spec => 'username|U=s',
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help => _gt('Username for HTTP Auth'),
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required => 0,
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);
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$np->add_arg (
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spec => 'password|P=s',
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help => _gt('Password for HTTP Auth'),
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required => 0,
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);
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$np->add_arg (
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spec => 'w=f',
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help => _gt('Warning request time threshold (in seconds)'),
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default => 2,
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label => 'FLOAT'
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);
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$np->add_arg (
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spec => 'c=f',
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help => _gt('Critical request time threshold (in seconds)'),
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default => 10,
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label => 'FLOAT'
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);
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$np->add_arg (
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spec => 'url|u=s',
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help => _gt('URL of the HAProxy csv statistics page.'),
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required => 1,
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);
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$np->getopts;
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$DEBUG = $np->opts->get('debug');
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my $verbose = $np->opts->get('verbose');
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my $username = $np->opts->get('username');
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my $password = $np->opts->get('password');
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# Thresholds :
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# time
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my $warn_t = $np->opts->get('w');
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my $crit_t = $np->opts->get('c');
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my $url = $np->opts->get('url');
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# Create a LWP user agent object:
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my $ua = new LWP::UserAgent(
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'env_proxy' => 0,
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'timeout' => $TIMEOUT,
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);
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$ua->agent(basename($0));
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# Workaround for LWP bug :
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$ua->parse_head(0);
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if ( defined($ENV{'http_proxy'}) ) {
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# Normal http proxy :
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$ua->proxy(['http'], $ENV{'http_proxy'});
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# Https must use Crypt::SSLeay https proxy (to use CONNECT method instead of GET)
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$ENV{'HTTPS_PROXY'} = $ENV{'http_proxy'};
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}
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# Build and submit an http request :
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my $request = HTTP::Request->new('GET', $url);
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# Authenticate if username and password are supplied
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if ( defined($username) && defined($password) ) {
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$request->authorization_basic($username, $password);
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}
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my $timer = time();
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my $http_response = $ua->request( $request );
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$timer = time()-$timer;
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my $status = $np->check_threshold(
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'check' => $timer,
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'warning' => $warn_t,
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'critical' => $crit_t,
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);
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$np->add_perfdata(
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'label' => 't',
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'value' => sprintf('%.6f',$timer),
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'min' => 0,
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'uom' => 's',
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'threshold' => $np->threshold()
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);
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if ( $status > OK ) {
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$np->add_message($status, sprintf(_gt("Response time degraded: %.6fs !"),$timer) );
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}
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my $message = 'msg';
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if ( $http_response->is_error() ) {
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my $err = $http_response->code." ".status_message($http_response->code)." (".$http_response->message.")";
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$np->add_message(CRITICAL, _gt("HTTP error: ").$err );
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} elsif ( ! $http_response->is_success() ) {
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my $err = $http_response->code." ".status_message($http_response->code)." (".$http_response->message.")";
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$np->add_message(CRITICAL, _gt("Internal error: ").$err );
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}
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($status, $message) = $np->check_messages();
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if ( $http_response->is_success() ) {
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# Get xml content ...
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my $stats = $http_response->content;
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if ($DEBUG) {
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print "------------------===http output===------------------\n$stats\n-----------------------------------------------------\n";
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print "t=".$timer."s\n";
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};
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my @fields = ();
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my @rows = split(/\n/,$stats);
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if ( $rows[0] =~ /#\ \w+/ ) {
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$rows[0] =~ s/#\ //;
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@fields = split(/\,/,$rows[0]);
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} else {
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$np->nagios_exit(UNKNOWN, _gt("Can't find csv header !") );
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}
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my %stats = ();
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for ( my $y = 1; $y < $#rows; $y++ ) {
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my @values = split(/\,/,$rows[$y]);
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if ( !defined($stats{$values[0]}) ) {
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$stats{$values[0]} = {};
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}
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if ( !defined($stats{$values[0]}{$values[1]}) ) {
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$stats{$values[0]}{$values[1]} = {};
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}
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for ( my $x = 2,; $x <= $#values; $x++ ) {
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# $stats{pxname}{svname}{valuename}
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$stats{$values[0]}{$values[1]}{$fields[$x]} = $values[$x];
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}
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}
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# print Dumper(\%stats);
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my %stats2 = ();
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my $okMsg = '';
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foreach my $pxname ( keys(%stats) ) {
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$stats2{$pxname} = {
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'act' => 0,
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'acttot' => 0,
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'bck' => 0,
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'bcktot' => 0,
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'scur' => 0,
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'slim' => 0,
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};
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foreach my $svname ( keys(%{$stats{$pxname}}) ) {
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if ( $stats{$pxname}{$svname}{'type'} eq '2' ) {
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my $svstatus = $stats{$pxname}{$svname}{'status'} eq 'UP';
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my $active = $stats{$pxname}{$svname}{'act'} eq '1';
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my $activeDescr = $active ? _gt("Active service") :_gt("Backup service") ;
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if ( $stats{$pxname}{$svname}{'status'} eq 'UP' ) {
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logD( sprintf(_gt("%s '%s' is up on '%s' proxy."),$activeDescr,$svname,$pxname) );
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} elsif ( $stats{$pxname}{$svname}{'status'} eq 'DOWN' ) {
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$np->add_message(CRITICAL, sprintf(_gt("%s '%s' is DOWN on '%s' proxy !"),$activeDescr,$svname,$pxname) );
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}
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if ( $stats{$pxname}{$svname}{'act'} eq '1' ) {
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$stats2{$pxname}{'acttot'}++;
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$stats2{$pxname}{'act'} += $svstatus;
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} elsif ($stats{$pxname}{$svname}{'bck'} eq '1') {
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$stats2{$pxname}{'bcktot'}++;
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$stats2{$pxname}{'bck'} += $svstatus;
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}
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$stats2{$pxname}{'scur'} += $stats{$pxname}{$svname}{'scur'};
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logD( "Current sessions : ".$stats{$pxname}{$svname}{'scur'} );
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} elsif ( $stats{$pxname}{$svname}{'type'} eq '0' ) {
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$stats2{$pxname}{'slim'} = $stats{$pxname}{$svname}{'slim'};
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}
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}
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if ( $stats2{$pxname}{'acttot'} > 0 ) {
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$okMsg .= ' '.$pxname.' (Active: '.$stats2{$pxname}{'act'}.'/'.$stats2{$pxname}{'acttot'};
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if ( $stats2{$pxname}{'bcktot'} > 0 ) {
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$okMsg .= ' , Backup: '.$stats2{$pxname}{'bck'}.'/'.$stats2{$pxname}{'bcktot'};
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}
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$okMsg .= ')';
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$np->add_perfdata(
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'label' => 'sess_'.$pxname,
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'value' => $stats2{$pxname}{'scur'},
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'min' => 0,
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'uom' => 'sessions',
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'max' => $stats2{$pxname}{'slim'},
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);
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}
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}
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# print Dumper(\%stats2);
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($status, $message) = $np->check_messages('join' => ' ');
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if ( $status == OK ) {
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$message = $okMsg;
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}
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}
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# if ( $verbose ) {
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# ($status, $message) = $np->check_messages('join' => '<br/>','join_all' => '<br/>');
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# } else {
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# ($status, $message) = $np->check_messages('join' => '<br/>');
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# }
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$np->nagios_exit($status, $message );
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sub logD {
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print STDERR 'DEBUG: '.$_[0]."\n" if ($DEBUG);
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}
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sub logW {
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print STDERR 'WARNING: '.$_[0]."\n" if ($DEBUG);
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}
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# Gettext wrapper
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sub _gt {
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return gettext($_[0]);
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}
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__END__
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=head1 NAME
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This Nagios plugins check the statistics url provided by HAProxy (http://haproxy.1wt.eu/).
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=head1 NAGIOS CONGIGURATIONS
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In F<checkcommands.cfg> you have to add :
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define command {
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command_name check_haproxy
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command_line $USER1$/check_haproxy.pl -u $ARG1$
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}
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In F<services.cfg> you just have to add something like :
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define service {
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host_name haproxy.exemple.org
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normal_check_interval 10
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retry_check_interval 5
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contact_groups linux-admins
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service_description HAProxy
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check_command check_haproxy!http://haproxy.exemple.org/haproxy?stats;csv
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}
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=head1 AUTHOR
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Stéphane Urbanovski <stephane.urbanovski@ac-nancy-metz.fr>
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=cut |
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