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134 lines
3.8 KiB
Perl
134 lines
3.8 KiB
Perl
#!/usr/bin/perl -w
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# Author: Nicolas Mendoza <nicolasm@opera.com> - 2008-06-18
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# Raphaël Droz <raphael.droz@gmail.com> - 2016-01-08
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#
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# Monitors the average time requests matching a custom regexp takes
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# For instance monitor time execution of files in http://example.com/foo/bar,
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# requests from google, images etc.
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#
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# Simply add an entry in the 'type' hashref and modify the description fields
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# for munin, and make the 'matches' member contain a subref that returns
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# true if a request matches, parameters are a list containing the request
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# split on spaces.
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#
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# NOTE: You need to add a field in your Apache logs showing time executed.
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# This is normally done using the %T (seconds) or %D (microseconds)
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# For instance:
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# LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\" %T %v"
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# Check http://httpd.apache.org/docs/2.2/mod/mod_log_config.html#formats for more info
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#
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# Configurable variables
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# fieldno - Override the default field number
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# linecount - How many last request to consider
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# Multiples instances for specific log files could be created by suffixing a configuration group.
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# Eg: ln -s apache_average_time_last_n_requests apache_average_time_last_n_requests_vhost1
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# Then:
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# [apache_average_time_last_n_requests]
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# logfile_vhost1 /var/log/apache/vhost1.log
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#
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#%# family=auto
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use strict;
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$0 =~ /apache_average_time_last_n_requests_(.+)*$/;
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my $name = $1;
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my $LAST_N_REQUESTS = exists $ENV{'linecount'} ? $ENV{'linecount'} : 100000; # calculate based on this amount of requests
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my $TIME_FIELD_INDEX = exists $ENV{'fieldno'} ? $ENV{'fieldno'} : -2; # second last field
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my $ACCESS_LOG_PATTERN;
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# log pattern, if globbing is used, it will take the last one.
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if (! $name) {
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$ACCESS_LOG_PATTERN = exists $ENV{'logfile'} ? $ENV{'logfile'} : '/var/log/apache2/access.log.*';
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}
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elsif (exists $ENV{'logfile_' . $name}) {
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$ACCESS_LOG_PATTERN = $ENV{'logfile_' . $name};
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}
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else {
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$ACCESS_LOG_PATTERN = '/var/log/apache2/access.log.*';
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}
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my $config =<< "CONFIG"
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graph_title Apache average seconds last $LAST_N_REQUESTS requests
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graph_args --base 1000
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graph_scale no
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graph_vlabel Average request time
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graph_category webserver
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graph_info This graph shows average request times for the last $LAST_N_REQUESTS requests
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CONFIG
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;
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my $types = {
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# any kind of request
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total => {
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munin_fields => {
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label => 'All requests',
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draw => 'LINE2',
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info => 'Average seconds per any request',
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},
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sum => 0,
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lines => 0,
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matches => sub {
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return 1;
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},
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},
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# image requests
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images => {
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munin_fields => {
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label => 'Image requests',
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draw => 'LINE2',
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info => 'Average seconds per image request',
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},
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sum => 0,
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lines => 0,
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matches => sub {
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my ($fields) = @_;
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my $script;
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($script = $fields->[6]) =~ s/\?.*\z //mx;
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return $script =~ m{ \.(png|jpe?g|gif|tiff|ilbm|tga) \z }mx;
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},
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},
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};
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if (@ARGV && $ARGV[0] eq 'config') {
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print $config;
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foreach my $type (keys %{$types}) {
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foreach my $key (keys %{$types->{$type}->{'munin_fields'}}) {
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printf "%s.%s %s\n", ($type, $key, $types->{$type}->{'munin_fields'}->{$key});
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}
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}
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exit(0);
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}
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my $config_file = `ls -1 $ACCESS_LOG_PATTERN | tail -n 1`;
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chomp $config_file;
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my @lines = `tail -n $LAST_N_REQUESTS "$config_file"`;
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FOO: {
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foreach my $line (@lines) {
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foreach my $type (keys %{$types}) {
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my @fields = split /\s+/, $line;
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if ($types->{$type}->{'matches'}(\@fields)) {
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if ($fields[$TIME_FIELD_INDEX] !~ m/^[0-9]+$/) {
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last FOO;
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}
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$types->{$type}->{'sum'} += $fields[$TIME_FIELD_INDEX];
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$types->{$type}->{'lines'}++;
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}
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}
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}
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}
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foreach my $type (keys %{$types}) {
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my $value = $types->{$type}->{'lines'} ? $types->{$type}->{'sum'} / $types->{$type}->{'lines'} : 'U';
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printf "%s.value %s\n", ($type, $value);
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}
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