package Nagios::Plugin::Performance; use 5.006; use strict; use warnings; use Carp; use base qw(Class::Accessor::Fast); __PACKAGE__->mk_ro_accessors( qw(label value uom warning critical min max) ); use Nagios::Plugin::Functions; use Nagios::Plugin::Threshold; use Nagios::Plugin::Range; our ($VERSION) = $Nagios::Plugin::Functions::VERSION; sub import { my ($class, %attr) = @_; $_ = $attr{use_die} || 0; Nagios::Plugin::Functions::_use_die($_); } # This is NOT the same as N::P::Functions::value_re. We leave that to be the strict # version. This one allows commas to be part of the numeric value. my $value = qr/[-+]?[\d\.,]+/; my $value_re = qr/$value(?:e$value)?/; my $value_with_negative_infinity = qr/$value_re|~/; sub _parse { my $class = shift; my $string = shift; $string =~ /^([^=]+)=($value_re)([\w%]*);?($value_with_negative_infinity\:?$value_re?)?;?($value_with_negative_infinity\:?$value_re?)?;?($value_re)?;?($value_re)?/o; return undef unless ((defined $1 && $1 ne "") && (defined $2 && $2 ne "")); my @info = ($1, $2, $3, $4, $5, $6, $7); # We convert any commas to periods, in the value fields map { defined $info[$_] && $info[$_] =~ s/,/./go } (1, 3, 4, 5, 6); # Check that $info[1] is an actual value # We do this by returning undef if a warning appears my $performance_value; { my $not_value; local $SIG{__WARN__} = sub { $not_value++ }; $performance_value = $info[1]+0; return undef if $not_value; } my $p = $class->new( label => $info[0], value => $performance_value, uom => $info[2], warning => $info[3], critical => $info[4], min => $info[5], max => $info[6] ); return $p; } # Map undef to '' sub _nvl { my ($self, $value) = @_; defined $value ? $value : '' } sub perfoutput { my $self = shift; my $out = sprintf "%s=%s%s;%s;%s;%s;%s", $self->label, $self->value, $self->_nvl($self->uom), $self->_nvl($self->warning), $self->_nvl($self->critical), $self->_nvl($self->min), $self->_nvl($self->max); # Previous implementation omitted trailing ;; - do we need this? $out =~ s/;;$//; return $out; } sub parse_perfstring { my ($class, $perfstring) = @_; my @perfs = (); my $obj; while ($perfstring) { $perfstring =~ s/^\s*//; if ($perfstring =~ /\s/) { $perfstring =~ s/^(.*?)\s//; $obj = $class->_parse($1); } else { $obj = $class->_parse($perfstring); $perfstring = ""; } push @perfs, $obj if $obj; } return @perfs; } sub rrdlabel { my $self = shift; my $name = $self->clean_label; # Shorten return substr( $name, 0, 19 ); } sub clean_label { my $self = shift; my $name = $self->label; if ($name eq "/") { $name = "root"; } elsif ( $name =~ s/^\/// ) { $name =~ s/\//_/g; } # Convert all other characters $name =~ s/\W/_/g; return $name; } # Backward compatibility: create a threshold object on the fly as requested sub threshold { my $self = shift; return Nagios::Plugin::Threshold->set_thresholds( warning => $self->warning, critical => $self->critical ); } # Constructor - unpack thresholds, map args to hashref sub new { my $class = shift; my %arg = @_; # Convert thresholds if (my $threshold = delete $arg{threshold}) { $arg{warning} ||= $threshold->warning . ""; $arg{critical} ||= $threshold->critical . ""; } $class->SUPER::new(\%arg); } 1; __END__ =head1 NAME Nagios::Plugin::Performance - class for handling Nagios::Plugin performance data. =head1 SYNOPSIS use Nagios::Plugin::Performance use_die => 1; # Constructor (also accepts a 'threshold' obj instead of warning/critical) $p = Nagios::Plugin::Performance->new( label => 'size', value => $value, uom => "kB", warning => $warning, critical => $critical, min => $min, max => $max, ); # Parser @perf = Nagios::Plugin::Performance->parse_perfstring( "/=382MB;15264;15269;; /var=218MB;9443;9448" ) or warn("Failed to parse perfstring"); # Accessors for $p (@perf) { printf "label: %s\n", $p->label; printf "value: %s\n", $p->value; printf "uom: %s\n", $p->uom; printf "warning: %s\n", $p->warning; printf "critical: %s\n", $p->critical; printf "min: %s\n", $p->min; printf "max: %s\n", $p->max; # Special accessor returning a threshold obj containing warning/critical $threshold = $p->threshold; } # Perfdata output format i.e. label=value[uom];[warn];[crit];[min];[max] print $p->perfoutput; =head1 DESCRIPTION Nagios::Plugin class for handling performance data. This is a public interface because it could be used by performance graphing routines, such as nagiostat (http://nagiostat.sourceforge.net), perfparse (http://perfparse.sourceforge.net), nagiosgraph (http://nagiosgraph.sourceforge.net) or NagiosGrapher (http://www.nagiosexchange.org/NagiosGrapher.84.0.html). Nagios::Plugin::Performance offers both a parsing interface (via parse_perfstring), for turning nagios performance output strings into their components, and a composition interface (via new), for turning components into perfdata strings. =head1 USE'ING THE MODULE If you are using this module for the purposes of parsing perf data, you will probably want to set use_die => 1 at use time. This forces &Nagios::Plugin::Functions::nagios_exit to call die() - rather than exit() - when an error occurs. This is then trappable by an eval. If you don't set use_die, then an error in these modules will cause your script to exit =head1 CLASS METHODS =over 4 =item Nagios::Plugin::Performance->new(%attributes) Instantiates a new Nagios::Plugin::Performance object with the given attributes. =item Nagios::Plugin::Performance->parse_perfstring($string) Returns an array of Nagios::Plugin::Performance objects based on the string entered. If there is an error parsing the string - which may consists of several sets of data - will return an array with all the successfully parsed sets. If values are input with commas instead of periods, due to different locale settings, then it will still be parsed, but the commas will be converted to periods. =back =head1 OBJECT METHODS (ACCESSORS) =over 4 =item label, value, uom, warning, critical, min, max These all return scalars. min and max are not well supported yet. =item threshold Returns a Nagios::Plugin::Threshold object holding the warning and critical ranges for this performance data (if any). =item rrdlabel Returns a string based on 'label' that is suitable for use as dataset name of an RRD i.e. munges label to be 1-19 characters long with only characters [a-zA-Z0-9_]. This calls $self->clean_label and then truncates to 19 characters. There is no guarantee that multiple N:P:Performance objects will have unique rrdlabels. =item clean_label Returns a "clean" label for use as a dataset name in RRD, ie, it converts characters that are not [a-zA-Z0-9_] to _. It also converts "/" to "root" and "/{name}" to "{name}". =item perfoutput Outputs the data in Nagios::Plugin perfdata format i.e. label=value[uom];[warn];[crit];[min];[max]. =back =head1 SEE ALSO Nagios::Plugin, Nagios::Plugin::Threshold, http://nagiosplug.sourceforge.net. =head1 AUTHOR This code is maintained by the Nagios Plugin Development Team: see http://nagiosplug.sourceforge.net. =head1 COPYRIGHT AND LICENSE Copyright (C) 2006-2007 Nagios Plugin Development Team This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =cut