807 lines
17 KiB
Plaintext
807 lines
17 KiB
Plaintext
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#!/usr/bin/perl -w
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#
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# varnish_ - Munin plugin for Multiple Varnish Servers
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# Copyright (C) 2009 Redpill Linpro AS
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#
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# Author: Kristian Lyngstøl <kristian@redpill-linpro.com>
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# Modified by Paul Mansfield so that it can be used with multiple
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# varnish instances
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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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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use strict;
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# Set to 1 to enable output when a variable is defined in a graph but
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# omitted because it doesn't exist in varnishstat.
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my $DEBUG = 0;
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# Set to 1 to ignore 'DEBUG' and suggest all available aspects.
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my $FULL_SUGGEST = 0;
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# Varnishstat executable. Include full path if it's not in your path.
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my $varnishstatexec = exists $ENV{'varnishstat'} ? $ENV{'varnishstat'} : "varnishstat";
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# For multiple instances
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my $varnishname = exists $ENV{'name'} ? $ENV{'name'} : undef;
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my %varnishstat = ();
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my %varnishstatnames = ();
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my $self; # Haha, myself, what a clever pun.
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# Parameters that can be defined on top level of a graph. Config will print
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# them as "graph_$foo $value\n"
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my @graph_parameters = ('title','total','order','scale','vlabel','args');
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# Parameters that can be defined on a value-to-value basis and will be
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# blindly passed to config. Printed as "$fieldname.$param $value\n".
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#
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# 'label' is hardcoded as it defaults to a varnishstat-description if not
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# set.
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my @field_parameters = ('graph', 'min', 'max', 'draw', 'cdef', 'warning',
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'colour', 'info', 'type');
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# Data structure that defines all possible graphs (aspects) and how they
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# are to be plotted. Every top-level entry is a graph/aspect. Each top-level graph
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# MUST have title set and 'values'.
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#
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# The 'values' hash must have at least one value definition. The actual
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# value used is either fetched from varnishstat based on the value-name, or
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# if 'rpn' is defined: calculated. 'type' SHOULD be set.
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#
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# Graphs with 'DEBUG' set to anything is omitted from 'suggest'.
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#
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# 'rpn' on values allows easy access to graphs consisting of multiple
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# values from varnishstat. (Reverse polish notation). The RPN
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# implementation only accepts +-*/ and varnishstat-values.
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#
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# With the exception of 'label', which is filled with the
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# varnishstat-description if left undefined, any value left undefined will
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# be left up to Munin to define/ignore/yell about.
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#
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# See munin documentation or rrdgraph/rrdtool for more information.
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my %ASPECTS = (
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'request_rate' => {
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'title' => 'Request rates',
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'order' => 'cache_hit cache_hitpass cache_miss '
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. 'backend_conn backend_unhealthy '
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. 'client_req client_conn' ,
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'values' => {
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'client_conn' => {
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'type' => 'DERIVE',
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'min' => '0',
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'colour' => '444444',
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'graph' => 'ON'
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},
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'client_req' => {
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'type' => 'DERIVE',
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'colour' => '111111',
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'min' => '0'
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},
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'cache_hit' => {
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'type' => 'DERIVE',
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'draw' => 'AREA',
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'colour' => '00FF00',
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'min' => '0'
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},
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'cache_hitpass' => {
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'info' => 'Hitpass are cached passes: An '
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. 'entry in the cache instructing '
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. 'Varnish to pass. Typically '
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. 'achieved after a pass in '
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. 'vcl_fetch.',
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'type' => 'DERIVE',
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'draw' => 'STACK',
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'colour' => 'FFFF00',
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'min' => '0'
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},
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'cache_miss' => {
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'type' => 'DERIVE',
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'colour' => 'FF0000',
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'draw' => 'STACK',
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'min' => '0'
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},
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'backend_conn' => {
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'type' => 'DERIVE',
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'colour' => '995599',
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'min' => '0'
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},
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'backend_unhealthy' => {
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'colour' => 'FF55FF',
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'type' => 'GAUGE'
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},
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's_pipe' => {
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'type' => 'DERIVE',
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'min' => '0',
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'colour' => '1d2bdf'
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},
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's_pass' => {
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'type' => 'DERIVE',
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'min' => '0',
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'colour' => '785d0d'
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}
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}
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},
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'hit_rate' => {
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'title' => 'Hit rates',
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'order' => 'client_req cache_hit cache_miss '
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. 'cache_hitpass' ,
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'vlabel' => '%',
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'args' => '-u 100 --rigid',
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'scale' => 'no',
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'values' => {
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'client_req' => {
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'type' => 'DERIVE',
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'min' => '0',
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'graph' => 'off'
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},
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'cache_hit' => {
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'type' => 'DERIVE',
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'min' => '0',
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'draw' => 'AREA',
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'cdef' => 'cache_hit,client_req,/,100,*'
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},
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'cache_miss' => {
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'type' => 'DERIVE',
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'draw' => 'STACK',
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'min' => '0',
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'cdef' => 'cache_miss,client_req,/,100,*'
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},
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'cache_hitpass' => {
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'type' => 'DERIVE',
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'draw' => 'STACK',
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'min' => '0',
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'cdef' => 'cache_hitpass,client_req,/,100,*'
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},
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}
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},
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'backend_traffic' => {
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'title' => 'Backend traffic',
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'values' => {
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'backend_conn' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'backend_unhealthy' => {
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'type' => 'GAUGE',
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'min' => '0',
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'warning' => ':1'
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},
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'backend_busy' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'backend_fail' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'backend_reuse' => {
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'type' => 'DERIVE',
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'min' => 0
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},
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'backend_recycle' => {
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'type' => 'DERIVE',
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'min' => 0
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},
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'backend_unused' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'backend_req' => {
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'type' => 'DERIVE',
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'min' => '0'
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}
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}
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},
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'objects' => {
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'title' => 'Number of objects',
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'values' => {
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'n_object' => {
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'type' => 'GAUGE',
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'label' => 'Number of objects'
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},
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'n_objecthead' => {
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'type' => 'GAUGE',
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'label' => 'Number of object heads',
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'info' => 'Each object head can have one '
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. 'or more ojbect attached, '
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. 'typically based on the Vary: header'
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}
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}
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},
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'transfer_rates' => {
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'title' => 'Transfer rates',
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'order' => 's_bodybytes s_hdrbytes',
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'args' => '-l 0',
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'vlabel' => 'bit/s',
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'values' => {
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's_hdrbytes' => {
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'type' => 'DERIVE',
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'label' => 'Header traffic',
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'draw' => 'STACK',
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'min' => '0',
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'info' => 'HTTP Header traffic. TCP/IP '
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. 'overhead is not included.',
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'cdef' => 's_hdrbytes,8,*'
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},
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's_bodybytes' => {
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'type' => 'DERIVE',
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'draw' => 'AREA',
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'label' => 'Body traffic',
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'min' => '0',
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'cdef' => 's_bodybytes,8,*'
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}
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}
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},
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'threads' => {
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'title' => 'Thread status',
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'values' => {
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'n_wrk' => {
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'type' => 'GAUGE',
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'min' => '0',
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'warning' => '1:'
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},
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'n_wrk_create' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'n_wrk_failed' => {
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'type' => 'DERIVE',
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'min' => '0',
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'warning' => ':1'
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},
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'n_wrk_max' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'n_wrk_overflow' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'n_wrk_drop' => {
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'type' => 'DERIVE',
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'min' => '0',
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'warning' => ':1'
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}
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}
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},
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'memory_usage' => {
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'title' => 'Memory usage',
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'order' => 'sm_balloc sma_nbytes sms_nbytes',
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'total' => 'Total',
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'args' => '--base 1024',
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'values' => {
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'sm_balloc' => {
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'type' => 'GAUGE',
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'draw' => 'AREA'
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},
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'sma_nbytes' => {
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'type' => 'GAUGE',
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'draw' => 'STACK'
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},
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'sms_nbytes' => {
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'type' => 'GAUGE',
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'draw' => 'STACK'
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}
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}
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},
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'uptime' => {
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'title' => 'Varnish uptime',
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'vlabel' => 'days',
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'scale' => 'no',
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'values' => {
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'uptime' => {
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'type' => 'GAUGE',
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'cdef' => 'uptime,86400,/'
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}
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}
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},
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'objects_per_objhead' => {
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'title' => 'Objects per objecthead',
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'DEBUG' => 'yes',
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'values' => {
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'obj_per_objhead' => {
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'type' => 'GAUGE',
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'label' => 'Objects per object heads',
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'rpn' => [ 'n_object','n_objecthead','/' ]
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}
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}
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},
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'losthdr' => {
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'title' => 'HTTP Header overflows',
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'DEBUG' => 'yes',
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'values' => {
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'losthdr' => {
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'type' => 'DERIVE',
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'min' => '0'
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}
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}
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},
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'obj_sendfile_vs_write' => {
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'title' => 'Objects delivered with sendfile() versus '
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. 'write()',
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'DEBUG' => 'yes',
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'values' => {
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'n_objsendfile' => {
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'type' => 'DERIVE',
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'min' => '0',
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},
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'n_objwrite' => {
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'type' => 'DERIVE',
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'min' => '0'
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}
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}
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},
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'hcb' => {
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'title' => 'Critbit data',
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'DEBUG' => 'yes',
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'values' => {
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'hcb_nolock' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'hcb_lock' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'hcb_insert' => {
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'type' => 'DERIVE',
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'min' => '0'
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}
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}
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},
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'esi' => {
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'title' => 'ESI',
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'DEBUG' => 'yes',
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'values' => {
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'esi_parse' => {
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'type' => 'DERIVE',
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'min' => '0'
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},
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'esi_errors' => {
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'type' => 'DERIVE',
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'min' => '0'
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}
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}
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},
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'objoverflow' => {
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'title' => 'Objects overflowing workspace',
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'DEBUG' => 'yes',
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'values' => {
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'n_objoverflow' => {
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'type' => 'DERIVE',
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|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'session' => {
|
||
|
|
'title' => 'Sessions',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'sess_closed' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'sess_pipeline' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'sess_readahead' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'sess_linger' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'session_herd' => {
|
||
|
|
'title' => 'Session herd',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'sess_herd' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'shm_writes' => {
|
||
|
|
'title' => 'SHM writes and records',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'shm_records' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'shm_writes' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'shm' => {
|
||
|
|
'title' => 'Shared memory activity',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'shm_flushes' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'shm_cont' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'shm_cycles' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'allocations' => {
|
||
|
|
'title' => 'Memory allocation requests',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'sm_nreq' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'sma_nreq' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'sms_nreq' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'vcl_and_purges' => {
|
||
|
|
'title' => 'VCL and purges',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'n_backend' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_vcl' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_vcl_avail' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_vcl_discard' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_purge' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_purge_add' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_purge_retire' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_purge_obj_test' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_purge_re_test' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_purge_dups' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'expunge' => {
|
||
|
|
'title' => 'Object expunging',
|
||
|
|
'values' => {
|
||
|
|
'n_expired' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_lru_nuked' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'lru' => {
|
||
|
|
'title' => 'LRU activity',
|
||
|
|
'DEBUG' => 'yes',
|
||
|
|
'values' => {
|
||
|
|
'n_lru_saved' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
},
|
||
|
|
'n_lru_moved' => {
|
||
|
|
'type' => 'DERIVE',
|
||
|
|
'min' => '0'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
'data_structures' => {
|
||
|
|
'DEBUG' => 'YES',
|
||
|
|
'title' => 'Data structure sizes',
|
||
|
|
'values' => {
|
||
|
|
'n_srcaddr' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_srcaddr_act' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_sess_mem' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_sess' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_smf' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_smf_frag' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_smf_large' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_vbe_conn' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
},
|
||
|
|
'n_bereq' => {
|
||
|
|
'type' => 'GAUGE'
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
# Populate %varnishstat with values and %varnishstatnames with
|
||
|
|
# descriptions.
|
||
|
|
sub populate_stats
|
||
|
|
{
|
||
|
|
my $arg = "-1";
|
||
|
|
if ($varnishname) {
|
||
|
|
$arg .= " -n $varnishname";
|
||
|
|
}
|
||
|
|
foreach my $line (`$varnishstatexec $arg`) {
|
||
|
|
chomp($line);
|
||
|
|
if ($line =~ /^([^ ]*)\s+(\d+)\s+(\d*\.\d*)\s+(.*)$/) {
|
||
|
|
$varnishstat{"$1"} = $2;
|
||
|
|
$varnishstatnames{"$1"} = $4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Bail-function.
|
||
|
|
sub usage
|
||
|
|
{
|
||
|
|
if (defined(@_) && "@_" ne "") {
|
||
|
|
print STDERR "@_" . "\n\n";
|
||
|
|
}
|
||
|
|
print STDERR "Known arguments: suggest, config, autoconf.\n";
|
||
|
|
print STDERR "Run with suggest to get a list of known aspects.\n";
|
||
|
|
exit 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
# Print 'yes' and exit true if it's reasonable to use this plugin.
|
||
|
|
# Otherwise exit with false and a human-readable reason.
|
||
|
|
sub autoconf
|
||
|
|
{
|
||
|
|
if (`which $varnishstatexec` eq '') {
|
||
|
|
print "no (which $varnishstatexec returns blank)\n";
|
||
|
|
exit 1;
|
||
|
|
}
|
||
|
|
print "yes\n";
|
||
|
|
exit 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
# Suggest relevant aspects/values of $self.
|
||
|
|
# 'DEBUG'-graphs are excluded.
|
||
|
|
sub suggest
|
||
|
|
{
|
||
|
|
foreach my $key (keys %ASPECTS) {
|
||
|
|
if (defined($ASPECTS{$key}{'DEBUG'}) && $FULL_SUGGEST != 1) {
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
print "$key\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Print the value of a two-dimensional hash if it exist.
|
||
|
|
# Returns false if non-existant.
|
||
|
|
#
|
||
|
|
# Output is formatted for plugins if arg4 is blank, otherwise arg4 is used
|
||
|
|
# as the title/name of the field (ie: arg4=graph_titel).
|
||
|
|
sub print_if_exist
|
||
|
|
{
|
||
|
|
my %values = %{$_[0]};
|
||
|
|
my $value = $_[1];
|
||
|
|
my $field = $_[2];
|
||
|
|
my $title = "$value.$field";
|
||
|
|
if (defined($_[3])) {
|
||
|
|
$title = $_[3];
|
||
|
|
}
|
||
|
|
if (defined($values{$value}{$field})) {
|
||
|
|
print "$title $values{$value}{$field}";
|
||
|
|
print " - $varnishname" if ($title eq 'graph_title');
|
||
|
|
print "\n";
|
||
|
|
} else {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Walk through the relevant aspect and print all top-level configuration
|
||
|
|
# values and value-definitions.
|
||
|
|
sub get_config
|
||
|
|
{
|
||
|
|
my $graph = $_[0];
|
||
|
|
|
||
|
|
# Need to double-check since set_aspect only checks this if there
|
||
|
|
# is no argument (suggest/autoconf doesn't require a valid aspect)
|
||
|
|
if (!defined($ASPECTS{$graph})) {
|
||
|
|
usage "No such aspect";
|
||
|
|
}
|
||
|
|
my %values = %{$ASPECTS{$graph}{'values'}};
|
||
|
|
|
||
|
|
print "graph_category Varnish\n";
|
||
|
|
foreach my $field (@graph_parameters) {
|
||
|
|
print_if_exist(\%ASPECTS,$graph,$field,"graph_$field");
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach my $value (keys %values) {
|
||
|
|
# Need either RPN definition or a varnishstat value.
|
||
|
|
if (!defined($varnishstat{$value}) &&
|
||
|
|
!defined($values{$value}{'rpn'})) {
|
||
|
|
if ($DEBUG) {
|
||
|
|
print "ERROR: $value not part of varnishstat.\n"
|
||
|
|
}
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!print_if_exist(\%values,$value,'label')) {
|
||
|
|
print "$value.label $varnishstatnames{$value}\n";
|
||
|
|
}
|
||
|
|
foreach my $field (@field_parameters) {
|
||
|
|
print_if_exist(\%values,$value,$field);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Read and verify the aspect ($self) -
|
||
|
|
# the format is varnish_NAME__aspect or varnish_aspect
|
||
|
|
sub set_aspect
|
||
|
|
{
|
||
|
|
$self = $0;
|
||
|
|
$self =~ s/^.*\/varnish_//;
|
||
|
|
|
||
|
|
if ($self =~ /^(\w+)__(.*)$/)
|
||
|
|
{
|
||
|
|
$varnishname = $1;
|
||
|
|
$self = $2;
|
||
|
|
}
|
||
|
|
if (!defined($ASPECTS{$self}) && @ARGV == 0) {
|
||
|
|
usage "No such aspect";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Handle arguments (config, autoconf, suggest)
|
||
|
|
# Populate stats for config is necessary, but we want to avoid it for
|
||
|
|
# autoconf as it would generate a nasty error.
|
||
|
|
sub check_args
|
||
|
|
{
|
||
|
|
if (@ARGV && $ARGV[0] eq '') {
|
||
|
|
shift @ARGV;
|
||
|
|
}
|
||
|
|
if (@ARGV == 1) {
|
||
|
|
if ($ARGV[0] eq "config") {
|
||
|
|
populate_stats;
|
||
|
|
get_config($self);
|
||
|
|
exit 0;
|
||
|
|
} elsif ($ARGV[0] eq "autoconf") {
|
||
|
|
autoconf($self);
|
||
|
|
exit 0;
|
||
|
|
} elsif ($ARGV[0] eq "suggest") {
|
||
|
|
suggest;
|
||
|
|
exit 0;
|
||
|
|
}
|
||
|
|
usage "Unknown argument";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# Braindead RPN: +,-,/,* will pop two items from @stack, and perform
|
||
|
|
# the relevant operation on the items. If the item in the array isn't one
|
||
|
|
# of the 4 basic math operations, a value from varnishstat is pushed on to
|
||
|
|
# the stack. IE: 'client_req','client_conn','/' will leave the value of
|
||
|
|
# "client_req/client_conn" on the stack.
|
||
|
|
#
|
||
|
|
# If only one item is left on the stack, it is printed. Otherwise, an error
|
||
|
|
# message is printed.
|
||
|
|
sub rpn
|
||
|
|
{
|
||
|
|
my @stack;
|
||
|
|
my $left;
|
||
|
|
my $right;
|
||
|
|
foreach my $item (@{$_[0]}) {
|
||
|
|
if ($item eq "+") {
|
||
|
|
$right = pop(@stack);
|
||
|
|
$left = pop(@stack);
|
||
|
|
push(@stack,$left+$right);
|
||
|
|
} elsif ($item eq "-") {
|
||
|
|
$right = pop(@stack);
|
||
|
|
$left = pop(@stack);
|
||
|
|
push(@stack,$left-$right);
|
||
|
|
} elsif ($item eq "/") {
|
||
|
|
$right = pop(@stack);
|
||
|
|
$left = pop(@stack);
|
||
|
|
push(@stack,$left/$right);
|
||
|
|
} elsif ($item eq "*") {
|
||
|
|
$right = pop(@stack);
|
||
|
|
$left = pop(@stack);
|
||
|
|
push(@stack,$left*$right);
|
||
|
|
} else {
|
||
|
|
push(@stack,int($varnishstat{$item}));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (@stack > 1)
|
||
|
|
{
|
||
|
|
print STDERR "RPN error: Stack has more than one item left.\n";
|
||
|
|
print STDERR "@stack\n";
|
||
|
|
exit 255;
|
||
|
|
}
|
||
|
|
print "@stack";
|
||
|
|
print "\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
################################
|
||
|
|
# Execution starts here #
|
||
|
|
################################
|
||
|
|
|
||
|
|
set_aspect;
|
||
|
|
check_args;
|
||
|
|
populate_stats;
|
||
|
|
|
||
|
|
# We only get here if we're supposed to.
|
||
|
|
|
||
|
|
# Walks through the relevant values and either prints the varnishstat, or
|
||
|
|
# if the 'rpn' variable is set, calls rpn() to execute ... the rpn.
|
||
|
|
#
|
||
|
|
# NOTE: Due to differences in varnish-versions, this checks if the value
|
||
|
|
# actually exist before using it.
|
||
|
|
foreach my $value (keys %{$ASPECTS{$self}{'values'}}) {
|
||
|
|
if (defined($ASPECTS{$self}{'values'}{$value}{'rpn'})) {
|
||
|
|
print "$value.value ";
|
||
|
|
rpn($ASPECTS{$self}{'values'}{$value}{'rpn'});
|
||
|
|
} else {
|
||
|
|
if (!defined($varnishstat{$value})) {
|
||
|
|
if ($DEBUG) {
|
||
|
|
print STDERR "Error: $value not part of "
|
||
|
|
. "varnishstat.\n";
|
||
|
|
}
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
#print "$varnishname.$value.value ";
|
||
|
|
print "$value.value ";
|
||
|
|
print "$varnishstat{$value}\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# end varnish_ plugin
|