#!/usr/bin/perl =head1 INSTALLATION This plugin does http requests to specified URLs and takes the response time. Use it to monitor remote sites. LWP::UserAgent and Time::HiRes are required =head1 CONFIGURATION [http_request_time] env.url1 http://127.0.0.1/1 env.url2 http://127.0.0.1/2 env.url3 http://www.example.com env.url3_name some_munin_internal_name env.url3_label Some random page on our website env.url3_proxy http://firewall:3128 env.timeout 3 Timeout is the timeout of any HTTP request. Tune to avoid a complete timeout of the plugin. =head1 MAGIC MARKERS #%# family=auto #%# capabilities=autoconf =head1 LICENSE GPLv2 =cut use strict; use warnings; use Munin::Plugin; use Time::HiRes qw(gettimeofday tv_interval); my $ret = undef; need_multigraph(); sub clean { my $surl=shift; $surl=~s/^https?:\/\///; $surl=~s|%[\w\d]|_|g; $surl=~s|[^\w\d_]|_|g; $surl=~s|_*$||g; $surl=~s|^_*||g; return $surl; }; if (! eval "require LWP::UserAgent;") { $ret = "LWP::UserAgent not found"; if ( ! defined $ARGV[0] ) { die $ret; } } my %URLS; # timeout in seconds for requests # slightly lower than the default global timeout (5 seconds) my $timeout = $ENV{'timeout'} || 3; for (my $i = 1; $ENV{"url$i"}; $i++) { my $url = $ENV{"url$i"}; my $proxy = $ENV{"url${i}_proxy"}; my $name = $ENV{"url${i}_name"} || clean($url); my $label = $ENV{"url${i}_label"} || $url; $URLS{$name}={ url=>$url, proxy=>$proxy, label=>$label, time=>'U' }; } if ( defined $ARGV[0] and $ARGV[0] eq "autoconf" ) { if ($ret) { print "no ($ret)\n"; exit 0; } my $ua = LWP::UserAgent->new(timeout => $timeout); foreach my $url (keys %URLS) { my $response = $ua->request(HTTP::Request->new('GET',$url)); if ($response->is_success) { next; } else { print "no (URL $url: ". $response->message .")\n"; exit 0; } } print "yes\n"; exit 0; } if ( defined $ARGV[0] and $ARGV[0] eq "config" ) { # master graph print "multigraph http_request_time\n"; print "graph_title HTTP(S) Request response times\n"; print "graph_args --base 1000\n"; print "graph_vlabel response time in ms\n"; print "graph_category webserver\n"; my @go; foreach my $name (keys %URLS) { my $url = $URLS{$name}; print "$name.label $$url{'label'}\n"; print "$name.info The response time of a single request\n"; print "$name.min 0\n"; print "$name.draw LINE1\n"; push(@go, $name); } # multigraphs foreach my $name (keys %URLS) { my $url = $URLS{$name}; print "\nmultigraph http_request_time.$name\n"; print "graph_title $$url{'url'}\n"; print "graph_args --base 1000\n"; print "graph_vlabel response time in ms\n"; print "graph_category webserver\n"; print "$name.label $$url{'label'}\n"; print "$name.info The response time of a single request\n"; print "$name.min 0\n"; print "$name.draw LINE1\n"; } exit 0; } my $ua = LWP::UserAgent->new(timeout => $timeout); foreach my $name (keys %URLS) { my $url = $URLS{$name}; if ($url->{proxy}) { $ua->proxy(['http', 'ftp'], $url->{proxy}); } else { $ua->proxy(['http', 'ftp'], undef); } # warm up my $response = $ua->request(HTTP::Request->new('GET',$$url{'url'})); # timed run my $t1=[gettimeofday]; $response = $ua->request(HTTP::Request->new('GET',$$url{'url'})); my $t2=[gettimeofday]; if ($response->is_success) { $$url{'time'}=sprintf("%d",tv_interval($t1,$t2)*1000); }; }; print("multigraph http_request_time\n"); foreach my $name (keys %URLS) { my $url = $URLS{$name}; print("$name.value $$url{'time'}\n"); } foreach my $name (keys %URLS) { my $url = $URLS{$name}; print("\nmultigraph http_request_time.$name\n"); print("$name.value $$url{'time'}\n"); } # vim:syntax=perl