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abed8e4 Sep 9, 2010
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#!/usr/bin/perl -w
# -*- cperl -*-
# Magic markers:
#%# family=auto
#%# capabilities=autoconf
# nginx_status --- Determine the current status of Nginx
# using the http_stub_status module.
# Copyright (C) 2010 António P. P. Almeida <appa@perusio.net>
# Author: António P. P. Almeida <appa@perusio.net>
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# Except as contained in this notice, the name(s) of the above copyright
# holders shall not be used in advertising or otherwise to promote the sale,
# use or other dealings in this Software without prior written authorization.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
=head1 NAME
nginx_status - Munin plugin to show the connection status for nginx
=encoding utf8
=head1 APPLICABLE SYSTEMS
Any nginx host
=head1 CONFIGURATION
This shows the default configuration of this plugin. You can override
the status URL and the User Agent.
[nginx*]
env.url http://localhost/nginx_status
env.ua nginx-status-verifier/0.1
Nginx must also be configured. Firstly the stub-status module must be
compiled, and secondly it must be configured like this:
server {
listen 127.0.0.1;
server_name localhost;
location /nginx_status {
stub_status on;
access_log off;
allow 127.0.0.1;
deny all;
}
}
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 VERSION
1.1
=head1 BUGS
None known
=head1 AUTHOR
Unknown. Mantained by António Almeida <appa@perusio.net>
=head1 REPOSITORY
Source code at http://github.com/perusio/nginx-munin
=head1 LICENSE
MIT
=cut
my $ret = undef;
if (! eval "require LWP::UserAgent;") {
$ret = "LWP::UserAgent not found";
}
chomp(my $fqdn=`hostname -f`);
## Environment defined variables.
## The default URL is nginx_status if different set it in the environment.
my $URL = exists $ENV{'url'} ? $ENV{'url'} : "http://$fqdn/nginx_status";
## The default user agent is ngnix-status-verifier/0.1 if different
## set it in the environment.
my $UA = exists $ENV{'ua'} ? $ENV{'ua'} : 'nginx-status-verifier/0.1';
## Munin autoconf method.
if (exists $ARGV[0] and $ARGV[0] eq "autoconf" ) {
if ($ret) {
print "no ($ret)\n";
exit 1;
}
my $ua = LWP::UserAgent->new(timeout => 30);
# Set the UA to something different from the libwww-perl.
# This UA is blocked.
$ua->agent($UA);
my $response = $ua->request(HTTP::Request->new('GET',$URL));
unless ($response->is_success and $response->content =~ /server/im) {
print "no (no nginx status on $URL)\n";
exit 1;
} else {
print "yes\n";
exit 0;
}
}
## Munin config method.
if (exists $ARGV[0] and $ARGV[0] eq "config") {
print "graph_title NGINX status\n";
print "graph_args --base 1000\n";
print "graph_category nginx\n";
print "graph_vlabel Connections\n";
print "total.label Active connections\n";
print "total.info Active connections\n";
print "total.draw LINE2\n";
print "reading.label Reading\n";
print "reading.info Reading\n";
print "reading.draw LINE2\n";
print "writing.label Writing\n";
print "writing.info Writing\n";
print "writing.draw LINE2\n";
print "waiting.label Waiting\n";
print "waiting.info Waiting\n";
print "waiting.draw LINE2\n";
exit 0;
}
my $ua = LWP::UserAgent->new(timeout => 30);
# Set the UA to something different from the libwww-perl.
# That UA is blocked.
$ua->agent($UA);
my $response = $ua->request(HTTP::Request->new('GET',$URL));
# Active connections: 1845
# server accepts handled requests
# 4566318 4566318 84218236
# Reading: 2 Writing: 278 Waiting: 1565
if ($response->content =~ /Active connections:\s+(\d+).*Reading:\s+(\d+).*Writing:\s+(\d+).*Waiting:\s+(\d+)/s) {
print "total.value $1\n";
print "reading.value $2\n";
print "writing.value $3\n";
print "waiting.value $4\n";
} else {
foreach (qw(total reading writing waiting)) {
print "$_.value U\n";
}
}