573 lines
15 KiB
Plaintext
573 lines
15 KiB
Plaintext
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#!/usr/bin/perl
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# -*- perl -*-
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#
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# Plugin to graph http performance
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# Version: 0.8.7
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#
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# The purpose of this plugin is to monitor several properties of a web page.
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# All measurements are done for the complete web page, including images, css
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# and other content a standard browser would download automatically.
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#
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# This version supports monitoring:
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# * The total time to download a complete web page (using serial GET requests)
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# * The total size of a web page
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# * The different response codes (200, 404, 500, etc)
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# * The different tags (img src, a href, etc)
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# * The the different content types (image/png, text/css/, etc)
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# * The number of elements the web page consists of
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#
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# Author: Espen Braastad / Linpro AS
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# espen@linpro.no
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#
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##### Short usage guide: #####
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#
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# Requirements:
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# * The server running this plugin must be allowed to connect to the web
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# server(s) you are going to monitor.
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# * Some perl modules:
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# Time::HiRes, LWP::UserAgent, HTML::LinkExtor, LWP::ConnCache
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#
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# Initial configuration:
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# 1. Copy this file to /usr/share/munin/plugins/
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#
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# 2. Create a file (/etc/munin/http_load_urls.txt) with one
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# full url per line, as many as you want, i.e.:
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# $ echo "http://www.dn.no/" >> /etc/munin/urls.txt
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# $ echo "http://www.intrafish.no/" >> /etc/munin/urls.txt
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#
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# 3. Add a cron job running the plugin with cron as the argument:
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# */15 * * * * <user> /usr/share/munin/plugins/http_load_ cron
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# <user> should be the user that has write permission to
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# the $cachedir directory set below. Set the intervals to
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# whatever you want.
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#
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# For verbose output (for debugging) you can do:
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# sudo -u <user> /usr/share/munin/plugins/http_load_ cron verbose
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#
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# 4. Run munin-node-configure --suggest --shell and run the symlink
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# commands manually to update the munin-node plugin list.
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#
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# (5. If you want to change the filter which the plugin uses to select which
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# tags to follow in a web page, edit the subroutine called "filter" below.)
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#
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# Add a new url to monitor:
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# 1. Add a new line in /etc/munin/urls.txt with the full URL, i.e.:
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# $ echo "http://www.linpro.no/" >> /etc/munin/http_load_urls.txt
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#
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# 2. Run munin-node-configure --suggest --shell and manually
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# add the new symlink(s)
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#
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# 3. /etc/init.d/munin-node restart
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#
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# Remove a url from monitoring:
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# 1. Remove it from /etc/munin/http_load_urls.txt
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#
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# 2. Remove ${cachedir}/http_load_<url_id>*
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#
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# 3. Remove /etc/munin/plugins/http_load_<url_id>*
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#
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# 4. /etc/init.d/munin-node restart
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#
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#####
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#
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# Todo:
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# * Add support for forking to simulate real browsers
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# * Use checksums as fieldnames
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#
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# $Id: $
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#
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# Magic markers:
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#%# family=auto
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#%# capabilities=autoconf suggest
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use strict;
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use Time::HiRes qw( gettimeofday tv_interval );
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use LWP::UserAgent;
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use HTML::LinkExtor;
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use LWP::ConnCache;
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my $url_file="/etc/munin/http_load_urls.txt";
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my $cachedir="/var/lib/munin/plugin-state";
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my $debug=0;
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my $timeout=10;
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my $max_redirects=10;
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my $scriptname="http_load_";
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my $category="network"; # The munin graph category
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my $useragent="Mozilla/5.0";
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# Function to read the $url_file and return the contents in a hash
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sub read_urls{
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my $file=$_[0];
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my %urls=();
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if(-r $file){
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open(FILE,'<'.$file);
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while (<FILE>) {
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my $url=$_;
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chomp($url);
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my $id=get_id($url);
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if(length($id)>0){
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$urls{$id}=$url;
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}
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}
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close (FILE);
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}
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return %urls;
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}
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# Function to read cache, return a hash
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sub read_cache{
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my $file=$_[0];
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my %cache=();
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if(-r $file){
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open(FILE,'<'.$file);
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while (<FILE>) {
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m/^(\S*)\s+(.*)$/;
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$cache{ $1 } = $2;
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}
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close (FILE);
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}
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return %cache;
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}
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# Function to filter the html tags, which files do we want to download
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sub filter{
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my $tag=$_[0];
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my $status=1;
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# Some example data:
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# link href http://www.intrafish.no/template/include/css/intrafish.css
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# script src http://www.intrafish.no/template/include/js/intrafish.js
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# a href http://adserver.adtech.de/?adlink%7C2.0%7C405%7C119488%7C1%7C16%7CADTECH;grp=8491;loc=300;
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# img src http://adserver.adtech.de/?adserv%7C2.0%7C405%7C119488%7C1%7C16%7CADTECH;grp=8491;
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# area href http://go.vg.no/cgi-bin/go.cgi/sol/http://www.sol.no/sgo/vg/http://www.sol.no/underholdning/humor/?partnerid=vg
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# status=1 => do download (default)
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# status=0 => do not download
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if("$tag" eq "form action"){
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$status=0;
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}
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if("$tag" eq "a href"){
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$status=0;
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}
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if("$tag" eq "area href"){
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$status=0;
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}
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return $status;
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}
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# Return the cache file name for this plugin
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sub get_cache_file_name{
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my $scriptname=$_[0];
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my $id=$_[1];
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my $type=$_[2];
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my $file="";
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$file = $scriptname . $id . ".cache";
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$debug && print "Cache file: " . $file . "\n";
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return $file;
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}
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# Get fieldname (making sure it is munin "compatible" as a fieldname)
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# 1. Remove all non-word characters from a string)
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# 2. Make sure it has maximum 19 characters
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sub get_fieldname{
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my $url=$_[0];
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$url =~ s/\W//g;
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if(length($url) > 19){
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$url = substr($url, 0, 19);
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}
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return $url;
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}
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# Same as get_fieldname except it doesn't substr
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sub get_id{
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my $url=$_[0];
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$url =~ s/\W//g;
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return $url;
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}
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$debug && print "Scriptname: " . $scriptname . "\n";
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# Get the url id and the type of the graph
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#
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# The filename format is http_load_X_Y where
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# X: The line number in urls.txt
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# X: The type of graph (elements, size, loadtime, ..)
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my ($id,$type);
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$0 =~ /http_load(?:_([^_]+)|)_(.+)\s*$/;
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$id = $1;
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$type = $2;
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$debug && print "Id: $id, Type: $type\n";
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if($ARGV[0] and $ARGV[0] eq "autoconf") {
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my %urls=&read_urls($url_file);
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if(keys(%urls) gt 0){
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print "yes\n";
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exit(0);
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} else {
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print "no\n";
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exit(1);
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}
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} elsif($ARGV[0] and $ARGV[0] eq "suggest") {
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# get the url list, print suggestions for usage
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my %urls=&read_urls($url_file);
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while ( my ($id, $url) = each(%urls) ) {
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$debug && print "id: $id => url: $url\n";
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print $id . "_size\n";
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print $id . "_loadtime\n";
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print $id . "_response\n";
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print $id . "_tags\n";
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print $id . "_type\n";
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print $id . "_elements\n";
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}
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exit(0);
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} elsif($ARGV[0] and $ARGV[0] eq "cron") {
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# This thing is run by cron and should write a cache file for munin-node to
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# read from
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my $verbose=0;
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if($ARGV[1] and $ARGV[1] eq "verbose") {
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$verbose=1;
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print "Verbose output\n";
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}
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my %urls=&read_urls($url_file);
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my %output;
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my %res;
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my $t0;
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my ($request,$response,$status,$link,$contents,$page_parser,$cachefile);
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while ( my ($id, $url) = each(%urls) ) {
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$verbose && print "Fetching $url (id: $id)... \n";
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$t0=0;
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$status=0;
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%output=();
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my $host="";
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if($url =~ m/\w+\:\/\/([^\/]+).*/){
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$host=$1;
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$verbose && print " Host: $host\n";
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}
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$output{"url"}=$url;
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$output{"timestamp"}=time();
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$verbose && print " Timestamp: " . $output{"timestamp"} . "\n";
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my $browser = LWP::UserAgent->new();
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$browser->agent($useragent);
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$browser->timeout(${timeout});
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$browser->max_redirect( $max_redirects );
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$browser->conn_cache(LWP::ConnCache->new());
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$response = $browser->get($url);
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# Calculating time from now:
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$t0 = [gettimeofday];
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if ($response->is_success()) {
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$status=1;
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$output{"elements_" . $host}+=1;
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}
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$contents = $response->content();
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$output{"loadtime_" . $host} += sprintf("%.6f",tv_interval ( $t0, [gettimeofday]));
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$output{"size_" . $host}+=length($contents);
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$output{"response_" . $host . "_" . $response->code}+=1;
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$output{"type_" . $response->content_type}+=1;
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$page_parser = HTML::LinkExtor->new(undef, $url);
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$page_parser->parse($contents)->eof;
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my @links = $page_parser->links;
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$verbose && print " Processing links:\n";
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%res=();
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foreach $link (@links){
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my $tag=$$link[0] . " " . $$link[1];
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$output{"tags_" . $$link[0] . "-" . $$link[1]}+=1;
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if(filter($tag)){
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$verbose && print " Processing: " . $$link[0] . " " . $$link[1] . " " . $$link[2] . "\n";
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# Extract the hostname and add it to the hash
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if($$link[2] =~ m/http\:\/\/([^\/]+).*/){
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$host=$1;
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$output{"elements_" . $host}+=1;
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}
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my $suburl=$$link[2];
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$t0 = [gettimeofday];
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$response = $browser->get($suburl);
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$output{"loadtime_" . $host} += sprintf("%.6f",tv_interval ( $t0, [gettimeofday]));
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$contents = $response->content();
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$output{"size_" . $host}+=length($contents);
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$output{"response_" . $host . "_" . $response->code}+=1;
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$output{"type_" . $response->content_type}+=1;
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$verbose && print " Response: " . $response->code . " Size: " . length($contents) . "\n";
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} else {
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$verbose && print " Skipping: " . $$link[0] . " " . $$link[1] . " " . $$link[2] . "\n";
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}
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}
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$cachefile=$cachedir . "/" . &get_cache_file_name($scriptname,$id,$type);
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$debug && print "Reading cache file: " . $cachefile . "... ";
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my %input=read_cache($cachefile);
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$debug && print "done\n";
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# Resetting all values to 0 before adding new values
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while ( my ($id, $value) = each(%input) ) {
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$input{$id}="U";
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}
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# Adding new values
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while ( my ($id, $value) = each(%output) ) {
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$input{$id}=$value;
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$verbose && print " Result: " . $id . " -> " . $value . "\n";
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}
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# Writing the cache
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$verbose && print "Writing cache file: " . $cachefile . "... ";
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open(FILE,">".$cachefile);
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while ( my ($id, $value) = each(%input) ) {
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print FILE $id . " " . $value . "\n";
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}
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close(FILE);
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$verbose && print "done\n";
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}
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exit(0);
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}elsif($ARGV[0] and $ARGV[0] eq "config") {
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my %urls=&read_urls($url_file);
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print "graph_title $urls{$id} ${type}\n";
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print "graph_args -l 0 --base 1000\n";
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print "graph_category " . $category . "\n";
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$debug && print "Reading cache file\n";
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my $cachefile=$cachedir . "/" . &get_cache_file_name($scriptname,$id,$type);
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my %cache=read_cache($cachefile);
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my $count=0;
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$debug && print "The cache file contains " . keys(%cache) . " lines\n";
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||
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|
|
||
|
|
if($type eq "size"){
|
||
|
|
print "graph_vlabel Bytes\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to calculate the total size of $urls{$id}.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^size_(\S+)$/){
|
||
|
|
my $host=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
print "$name.label from $host\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 20000000\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}elsif($type eq "loadtime"){
|
||
|
|
print "graph_vlabel Seconds\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to calculate the total time to load $urls{$id}. ";
|
||
|
|
print "Note that browsers usually fork() the GET requests, resulting in a shorter total loading time.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^loadtime_(\S+)$/){
|
||
|
|
my $host=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
print "$name.label from $host\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 400\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}elsif($type eq "elements"){
|
||
|
|
print "graph_vlabel Number of elements\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to count the number of elements (images, CSS files, etc) from $urls{$id}.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^elements_(\S+)$/){
|
||
|
|
my $host=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
print "$name.label from $host\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 10000\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}elsif($type eq "response"){
|
||
|
|
print "graph_vlabel Server response code count\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to visualize the server response codes received while loading $urls{$id}.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^response_(\S+)$/){
|
||
|
|
my $host=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
$host =~ s/\_/ /g;
|
||
|
|
$host =~ s/(\S+)\s(\d+)/ /g;
|
||
|
|
$host=$1;
|
||
|
|
my $code=$2;
|
||
|
|
|
||
|
|
print "$name.label $host ($code)\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 10000\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}elsif($type eq "type"){
|
||
|
|
print "graph_vlabel Content type count\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to visualize the different content types $urls{$id} consists of.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^type_(\S+)$/){
|
||
|
|
my $type=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
#$host =~ s/\_/ /g;
|
||
|
|
#$host =~ s/(\S+)\s(\S+)/ /g;
|
||
|
|
#$host=$1;
|
||
|
|
#my $type=$2;
|
||
|
|
|
||
|
|
print "$name.label $type\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 100000\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}elsif($type eq "tags"){
|
||
|
|
print "graph_vlabel HTML tag count\n";
|
||
|
|
print "graph_total Total\n";
|
||
|
|
print "graph_info This graph is generated by a set of serial GETs to visualize the different tags $urls{$id} consists of.\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort reverse keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
|
||
|
|
if($key =~ m/^tags_(\S+)$/){
|
||
|
|
my $host=$1;
|
||
|
|
my $value=$value;
|
||
|
|
|
||
|
|
my $name=$1;
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
|
||
|
|
$host =~ s/\W/ /g;
|
||
|
|
|
||
|
|
print "$name.label $host\n";
|
||
|
|
print "$name.min 0\n";
|
||
|
|
print "$name.max 100000\n";
|
||
|
|
if($count eq 0){
|
||
|
|
print "$name.draw AREA\n";
|
||
|
|
} else {
|
||
|
|
print "$name.draw STACK\n";
|
||
|
|
}
|
||
|
|
$count+=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exit(0);
|
||
|
|
} else {
|
||
|
|
my $cachefile=$cachedir . "/" . &get_cache_file_name($scriptname,$id,$type);
|
||
|
|
$debug && print "Reading cache file: " . $cachefile . "\n";
|
||
|
|
my %cache=read_cache($cachefile);
|
||
|
|
$debug && print "Number of lines in cache file: " . keys(%cache) . "\n";
|
||
|
|
|
||
|
|
if(keys(%cache)>0){
|
||
|
|
for my $key ( sort keys %cache ){
|
||
|
|
my $value=$cache{$key};
|
||
|
|
if($key =~ m/^([A-Za-z]+)\_(\S+)$/){
|
||
|
|
my $name=$2;
|
||
|
|
|
||
|
|
if ($1 eq $type){
|
||
|
|
$name=get_fieldname($name);
|
||
|
|
print $name . ".value " . $value . "\n";
|
||
|
|
}
|
||
|
|
} elsif(m/^(\S+)\s+(\S+)$/){
|
||
|
|
if ($1 eq $type){
|
||
|
|
print $1 . ".value " . $2 . "\n";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# vim:syntax=perl
|