File check_apachestatus.pl of Package monitoring-plugins-apache
#!/usr/bin/perl -w
####################### check_apachestatus.pl #######################
# Version : 1.1
# Date : 27 Jul 2007
# Author : De Bodt Lieven (Lieven.DeBodt at gmail.com)
# Licence : GPL - http://www.fsf.org/licenses/gpl.txt
#############################################################
#
# 20080912 <karsten at behrens dot in> v1.2
# added output of Requests/sec, kB/sec, kB/request
# changed perfdata output so that PNP accepts it
# http://www.behrens.in/download/check_apachestatus.pl.txt
#
# 20080930 <karsten at behrens dot in> v1.3
# Fixed bug in perfdata regexp when Apache output was
# "nnn B/sec" instead of "nnn kB/sec"
#
# 20081231 <geoff.mcqueen at hiivesystems dot com > v1.4
# Made the scale logic more robust to byte only, kilobyte
# and provided capacity for MB and GB scale options
# on bytes per second and bytes per request (untested)
#
# help : ./check_apachestatus.pl -h
use strict;
use Getopt::Long;
use LWP::UserAgent;
use Time::HiRes qw(gettimeofday tv_interval);
# Nagios specific
use lib "/usr/lib/nagios/plugins";
use utils qw(%ERRORS $TIMEOUT);
#my %ERRORS=('OK'=>0,'WARNING'=>1,'CRITICAL'=>2,'UNKNOWN'=>3,'DEPENDENT'=>4);
# Globals
my $Version='1.4';
my $Name=$0;
my $o_host = undef; # hostname
my $o_help= undef; # want some help ?
my $o_port = undef; # port
my $o_version= undef; # print version
my $o_warn_level= undef; # Number of available slots that will cause a warning
my $o_crit_level= undef; # Number of available slots that will cause an error
my $o_timeout= 15; # Default 15s Timeout
# functions
sub show_versioninfo { print "$Name version : $Version\n"; }
sub print_usage {
print "Usage: $Name -H <host> [-p <port>] [-t <timeout>] [-w <warn_level> -c <crit_level>] [-V]\n";
}
# Get the alarm signal
$SIG{'ALRM'} = sub {
print ("ERROR: Alarm signal (Nagios time-out)\n");
exit $ERRORS{"CRITICAL"};
};
sub help {
print "Apache Monitor for Nagios version ",$Version,"\n";
print "GPL licence, (c)2006-2007 De Bodt Lieven\n\n";
print_usage();
print <<EOT;
-h, --help
print this help message
-H, --hostname=HOST
name or IP address of host to check
-p, --port=PORT
Http port
-t, --timeout=INTEGER
timeout in seconds (Default: $o_timeout)
-w, --warn=MIN
number of available slots that will cause a warning
-1 for no warning
-c, --critical=MIN
number of available slots that will cause an error
-V, --version
prints version number
Note :
The script will return
* Without warn and critical options:
OK if we are able to connect to the apache server's status page,
CRITICAL if we aren't able to connect to the apache server's status page,,
* With warn and critical options:
OK if we are able to connect to the apache server's status page and #available slots > <warn_level>,
WARNING if we are able to connect to the apache server's status page and #available slots <= <warn_level>,
CRITICAL if we are able to connect to the apache server's status page and #available slots <= <crit_level>,
UNKNOWN if we aren't able to connect to the apache server's status page
Perfdata legend:
"_;S;R;W;K;D;C;L;G;I;.;1;2;3"
_ : Waiting for Connection
S : Starting up
R : Reading Request
W : Sending Reply
K : Keepalive (read)
D : DNS Lookup
C : Closing connection
L : Logging
G : Gracefully finishing
I : Idle cleanup of worker
. : Open slot with no current process
1 : Requests per sec
2 : kB per sec
3 : kB per Request
EOT
}
sub check_options {
Getopt::Long::Configure ("bundling");
GetOptions(
'h' => \$o_help, 'help' => \$o_help,
'H:s' => \$o_host, 'hostname:s' => \$o_host,
'p:i' => \$o_port, 'port:i' => \$o_port,
'V' => \$o_version, 'version' => \$o_version,
'w:i' => \$o_warn_level, 'warn:i' => \$o_warn_level,
'c:i' => \$o_crit_level, 'critical:i' => \$o_crit_level,
't:i' => \$o_timeout, 'timeout:i' => \$o_timeout,
);
if (defined ($o_help)) { help(); exit $ERRORS{"UNKNOWN"}};
if (defined($o_version)) { show_versioninfo(); exit $ERRORS{"UNKNOWN"}};
if (((defined($o_warn_level) && !defined($o_crit_level)) || (!defined($o_warn_level) && defined($o_crit_level))) || ((defined($o_warn_level) && defined($o_crit_level)) && (($o_warn_level != -1) && ($o_warn_level <= $o_crit_level)))) {
print "Check warn and crit!\n"; print_usage(); exit $ERRORS{"UNKNOWN"}
}
# Check compulsory attributes
if (!defined($o_host)) { print_usage(); exit $ERRORS{"UNKNOWN"}};
}
########## MAIN ##########
check_options();
my $ua = LWP::UserAgent->new( protocols_allowed => ['http'], timeout => $o_timeout);
my $timing0 = [gettimeofday];
my $response = undef;
if (!defined($o_port)) {
$response = $ua->get('http://' . $o_host . '/server-status');
} else {
$response = $ua->get('http://' . $o_host . ':' . $o_port . '/server-status');
}
my $timeelapsed = tv_interval ($timing0, [gettimeofday]);
my $webcontent = undef;
if ($response->is_success) {
$webcontent=$response->content;
my @webcontentarr = split("\n", $webcontent);
my $i = 0;
my $BusyWorkers=undef;
my $IdleWorkers=undef;
# Get the amount of idle and busy workers(Apache2)/servers(Apache1)
while (($i < @webcontentarr) && ((!defined($BusyWorkers)) || (!defined($IdleWorkers)))) {
if ($webcontentarr[$i] =~ /(\d+)\s+requests\s+currently\s+being\s+processed,\s+(\d+)\s+idle\s+....ers/) {
($BusyWorkers, $IdleWorkers) = ($webcontentarr[$i] =~ /(\d+)\s+requests\s+currently\s+being\s+processed,\s+(\d+)\s+idle\s+....ers/);
}
$i++;
}
# get requests/sec, kb/sec, kb/req
$i = 0;
my $ReqPerSec=undef;
my $KbPerSec=undef;
my $KbPerReq=undef;
my $KbRatios = {
g => 1048576,
m => 1024,
k => 1,
empty => 0.0009765625,
};
while (($i < @webcontentarr) && ((!defined($ReqPerSec)) || (!defined($KbPerSec)) || (!defined($KbPerReq)))) {
if ($webcontentarr[$i] =~ /([0-9]*\.?[0-9]+)\s+requests\/sec\s+-\s+([0-9]*\.?[0-9]+)\s+(\w)*B\/second\s+-\s+([0-9]*\.?[0-9]+)\s+(\w)*B\/request/) {
my ($Requests, $bPerSec, $sPerSec, $bPerReq, $sPerReq) = ($webcontentarr[$i] =~ /([0-9]*\.?[0-9]+)\s+requests\/sec\s+-\s+([0-9]*\.?[0-9]+)\s+(\w)*B\/second\s+-\s+([0-9]*\.?[0-9]+)\s+(\w)*B\/request/);
$ReqPerSec=$Requests;
if ($sPerSec) {
$KbPerSec = $bPerSec*$KbRatios->{lc($sPerSec)};
} else {
$KbPerSec = $bPerSec*$KbRatios->{empty};
}
if ($sPerReq) {
$KbPerReq = $bPerReq*$KbRatios->{lc($sPerReq)};
} else {
$KbPerReq = $bPerReq*$KbRatios->{empty};
}
}
$i++;
}
# Get the scoreboard
my $ScoreBoard = "";
$i = 0;
my $PosPreBegin = undef;
my $PosPreEnd = undef;
while (($i < @webcontentarr) && ((!defined($PosPreBegin)) || (!defined($PosPreEnd)))) {
if (!defined($PosPreBegin)) {
if ( $webcontentarr[$i] =~ m/<pre>/i ) {
$PosPreBegin = $i;
}
}
if (defined($PosPreBegin)) {
if ( $webcontentarr[$i] =~ m/<\/pre>/i ) {
$PosPreEnd = $i;
}
}
$i++;
}
for ($i = $PosPreBegin; $i <= $PosPreEnd; $i++) {
$ScoreBoard = $ScoreBoard . $webcontentarr[$i];
}
$ScoreBoard =~ s/^.*<[Pp][Rr][Ee]>//;
$ScoreBoard =~ s/<\/[Pp][Rr][Ee].*>//;
my $CountOpenSlots = ($ScoreBoard =~ tr/\.//);
if (defined($o_crit_level) && ($o_crit_level != -1)) {
if (($CountOpenSlots + $IdleWorkers) <= $o_crit_level) {
printf("CRITICAL %f seconds response time. Idle %d, busy %d, open slots %d | 'Waiting for Connection'=%d 'Starting Up'=%d 'Reading Request'=%d 'Sending Reply'=%d 'Keepalive (read)'=%d 'DNS Lookup'=%d 'Closing Connection'=%d 'Logging'=%d 'Gracefully finishing'=%d 'Idle cleanup'=%d 'Open slot'=%d 'Requests/sec'=%0.1f 'kB per sec'=%0.1fKB 'kB per Request'=%0.1fKB\n", $timeelapsed, $IdleWorkers, $BusyWorkers, $CountOpenSlots, ($ScoreBoard =~ tr/\_//), ($ScoreBoard =~ tr/S//),($ScoreBoard =~ tr/R//),($ScoreBoard =~ tr/W//),($ScoreBoard =~ tr/K//),($ScoreBoard =~ tr/D//),($ScoreBoard =~ tr/C//),($ScoreBoard =~ tr/L//),($ScoreBoard =~ tr/G//),($ScoreBoard =~ tr/I//), $CountOpenSlots, $ReqPerSec, $KbPerSec, $KbPerReq);
exit $ERRORS{"CRITICAL"}
}
}
if (defined($o_warn_level) && ($o_warn_level != -1)) {
if (($CountOpenSlots + $IdleWorkers) <= $o_warn_level) {
printf("WARNING %f seconds response time. Idle %d, busy %d, open slots %d | 'Waiting for Connection'=%d 'Starting Up'=%d 'Reading Request'=%d 'Sending Reply'=%d 'Keepalive (read)'=%d 'DNS Lookup'=%d 'Closing Connection'=%d 'Logging'=%d 'Gracefully finishing'=%d 'Idle cleanup'=%d 'Open slot'=%d 'Requests/sec'=%0.1f 'kB per sec'=%0.1fKB 'kB per Request'=%0.1fKB\n", $timeelapsed, $IdleWorkers, $BusyWorkers, $CountOpenSlots, ($ScoreBoard =~ tr/\_//), ($ScoreBoard =~ tr/S//),($ScoreBoard =~ tr/R//),($ScoreBoard =~ tr/W//),($ScoreBoard =~ tr/K//),($ScoreBoard =~ tr/D//),($ScoreBoard =~ tr/C//),($ScoreBoard =~ tr/L//),($ScoreBoard =~ tr/G//),($ScoreBoard =~ tr/I//), $CountOpenSlots, $ReqPerSec, $KbPerSec, $KbPerReq);
exit $ERRORS{"WARNING"}
}
}
printf("OK %f seconds response time. Idle %d, busy %d, open slots %d | 'Waiting for Connection'=%d 'Starting Up'=%d 'Reading Request'=%d 'Sending Reply'=%d 'Keepalive (read)'=%d 'DNS Lookup'=%d 'Closing Connection'=%d 'Logging'=%d 'Gracefully finishing'=%d 'Idle cleanup'=%d 'Open slot'=%d 'Requests/sec'=%0.1f 'kB per sec'=%0.1fKB 'kB per Request'=%0.1fKB\n", $timeelapsed, $IdleWorkers, $BusyWorkers, $CountOpenSlots, ($ScoreBoard =~ tr/\_//), ($ScoreBoard =~ tr/S//),($ScoreBoard =~ tr/R//),($ScoreBoard =~ tr/W//),($ScoreBoard =~ tr/K//),($ScoreBoard =~ tr/D//),($ScoreBoard =~ tr/C//),($ScoreBoard =~ tr/L//),($ScoreBoard =~ tr/G//),($ScoreBoard =~ tr/I//), $CountOpenSlots, $ReqPerSec, $KbPerSec, $KbPerReq);
exit $ERRORS{"OK"}
}
else {
if (defined($o_warn_level) || defined($o_crit_level)) {
printf("UNKNOWN %s\n", $response->status_line);
exit $ERRORS{"UNKNOWN"}
} else {
printf("CRITICAL %s\n", $response->status_line);
exit $ERRORS{"CRITICAL"}
}
}
