1 files changed, 283 insertions, 0 deletions

diff --git a/contrib/check_apache.pl b/contrib/check_apache.pl
new file mode 100644
index 0000000..b9e69a0
--- /dev/null
+++ b/contrib/check_apache.pl
@@ -0,0 +1,283 @@
+#!/usr/bin/perl
+#
+# (c)2001 Sebastian Hetze, Linux Information Systems AG
+# send bug reports to <S.Hetze@Linux-AG.com>
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty
+# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# you should have received a copy of the GNU General Public License
+# along with this program (or with Nagios);  if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA
+#
+#
+# Check apache status information provided by mod_status to find
+# out about the load (number of servers working) and the
+# performance (average response time for recent requests).
+#
+# Usage:
+# check_apache -H <host> [-lhV] [-w <warn>] [-c <crit>] [-u <url>]
+#
+# check_apache <host> <warn> <crit> <url> (if you cannot avoid it)
+#
+
+use LWP::UserAgent;
+use URI::URL;
+use Getopt::Long;
+Getopt::Long::Configure('bundling');
+
+$version=0.01;
+
+my %ERRORS = ('UNKNOWN' , '-1',
+              'OK' , '0',
+              'WARNING', '1',
+              'CRITICAL', '2');
+
+
+#
+#              some default values
+#
+$perf_w=500;
+$perf_c=1000;
+$load_w=20;
+$load_c=30;
+$TIMEOUT=15;
+
+#
+#              get command line options the regular way
+#
+GetOptions
+        ("V"   => \$opt_V, "version"       => \$opt_V,
+         "h"   => \$opt_h, "help"          => \$opt_h,
+         "l"   => \$opt_l, "load"          => \$opt_l,
+         "v" => \$verbose, "verbose"       => \$verbose,
+         "w=s" => \$opt_w, "warning=s"     => \$opt_w,
+         "c=s" => \$opt_c, "critical=s"    => \$opt_c,
+         "H=s" => \$opt_H, "hostname=s"    => \$opt_H,
+         "u=s" => \$opt_u, "url=s"         => \$opt_u);
+
+#
+#              handle the verbose stuff first
+#
+if ($opt_V) {
+        print "\n";
+        print "check_apache nagios plugin version $version\n";
+        print "\n";
+        print "The nagios plugins come with ABSOLUTELY NO WARRANTY.  You may redistribute\n";
+        print "copies of the plugins under the terms of the GNU General Public License.\n";
+        print "For more information about these matters, see the file named COPYING.\n";
+        print "\n";
+        print "Copyright (c) 2001 Sebastian Hetze  Linux Information Systems AG\n";
+        print "\n";
+        print "\n";
+        exit $ERRORS{'UNKNOWN'};
+} 
+
+if ($opt_h) {
+        print_help();
+        exit $ERRORS{'UNKNOWN'};
+}
+
+#
+#              now get options the weired way and set the defaults
+#              if nothing else is provided
+#
+$opt_H = shift unless ($opt_H);
+print_usage() unless ($opt_H);
+
+if($opt_l) {
+   $autostring="?auto";
+   ($opt_w) || ($opt_w = shift) || ($opt_w = $load_w);
+   $warn = $1 if ($opt_w =~ /([0-9]+)/);
+   ($opt_c) || ($opt_c = shift) || ($opt_c = $load_c);
+   $alert = $1 if ($opt_c =~ /([0-9]+)/);
+} else {
+   $autostring="";
+   ($opt_w) || ($opt_w = shift) || ($opt_w = $perf_w);
+   $warn = $1 if ($opt_w =~ /([0-9]+)/);
+   ($opt_c) || ($opt_c = shift) || ($opt_c = $perf_c);
+   $alert = $1 if ($opt_c =~ /([0-9]+)/);
+}
+
+($opt_u) || ($opt_u = shift) || ($opt_u = "/server-status");
+
+
+#
+#              dont let us wait forever...
+#
+$SIG{'ALRM'} = sub {
+     print ("ERROR: No response from HTTP server (alarm)\n");
+     exit $ERRORS{"UNKNOWN"};
+};
+alarm($TIMEOUT);
+
+
+#
+#              now we set things up for the real work
+#              and fire up the request
+#
+$ua = new LWP::UserAgent;
+$ua->agent("Nagios/0.1 " . $ua->agent);
+
+
+$urlstring = "http://" . $opt_H . $opt_u . $autostring;
+$url = url($urlstring);
+
+my $req = new HTTP::Request 'GET', $url;
+my $res = $ua->request($req);
+
+#
+#              hopefully we´ve got something usefull
+#
+if ($res->is_success) {
+  if($opt_l) {
+     foreach $_ (split /^/m, $res->content) {
+        next if /^\s*$/;
+#
+#              this is the load checking section
+#              we parse the whole content, just in case someone
+#              wants to use this some day in the future
+#
+        if (/^Total Accesses:\s+([0-9.]+)/) { $accesses = $1; next; }
+        if (/^Total kBytes:\s+([0-9.]+)/) { $kbytes = $1; next; }
+        if (/^CPULoad:\s+([0-9.]+)\s+/) { $load = $1; next; }
+        if (/^Uptime:\s+([0-9.]+)\s+/) { $uptime = $1; next; }
+        if (/^ReqPerSec:\s+([0-9.]+)\s+/) { $rps = $1; next; }
+        if (/^BytesPerSec:\s+([0-9.]+)\s+/) { $bps = $1; next; }
+        if (/^BytesPerReq:\s+([0-9.]+)\s+/) { $bpr = $1; next; }
+        if (/^BusyServers:\s+([0-9.]+)\s+/) { $busy = $1; next; }
+        if (/^IdleServers:\s+([0-9.]+)\s+/) { $idle = $1; next; }
+        if (/^Scoreboard:\s+([SRWKDLG_.]+)\s+/) { $score = $1; next; }
+        print "Unknown Status\n";
+        exit $ERRORS{"UNKNOWN"};
+     }
+#
+#              now we even parse the whole scoreboard, just for fun
+#
+     foreach $scorepoint (split //m, $score) {
+        if($scorepoint eq '.') { $scores{'.'}+=1; next; }  # Unused
+        if($scorepoint eq '_') { $scores{'_'}+=1; next; }  # Waiting
+        if($scorepoint eq 'S') { $scores{'S'}+=1; next; }  # Starting
+        if($scorepoint eq 'R') { $scores{'R'}+=1; next; }  # Reading
+        if($scorepoint eq 'W') { $scores{'W'}+=1; next; }  # Writing
+        if($scorepoint eq 'K') { $scores{'K'}+=1; next; }  # Keepalive
+        if($scorepoint eq 'D') { $scores{'D'}+=1; next; }  # DNS Lookup
+        if($scorepoint eq 'L') { $scores{'L'}+=1; next; }  # Logging
+        if($scorepoint eq 'G') { $scores{'G'}+=1; next; }  # Going
+     }
+
+     if($busy>$alert) {
+        printf "HTTPD CRITICAL: %.0f servers running\n", $busy;
+        exit $ERRORS{"CRITICAL"};
+     }
+     if($busy>$warn) {
+        printf "HTTPD WARNING: %.0f servers running\n", $busy;
+        exit $ERRORS{"WARNING"};
+     }
+     printf "HTTPD ok: %.0f servers running, %d idle\n", $busy, $idle;
+     exit $ERRORS{"OK"};
+
+  } else {
+#
+#              this is the performance check section
+#              We are a bit lazy here, no parsing of the initial data
+#              block and the scoreboard.
+#              However, you have the whole set of per server
+#              information to play with ;-)
+#              The actual performance is measured by adding up the
+#              milliseconds required to process the most recent
+#              requests of all instances and then taking the average.
+#
+     foreach $tablerow (split /<tr>/m, $res->content) {
+         ($empty,$Srv,$PID,$Acc,$M,$CPU,$SS,$Req,$Conn,$Child,$Slot,$Client,$VHost,$Request)
+         = split /<td>/, $tablerow;
+         if($Req) {
+              $lines+=1;
+              $req_sum+=$Req;
+         }
+         undef $Req;
+     }
+     $average=$req_sum/$lines;
+     if($average>$alert) {
+        printf "HTTPD CRITICAL: average response time %.0f
+        milliseconds\n", $average;
+        exit $ERRORS{"CRITICAL"};
+     }
+     if($average>$warn) {
+        printf "HTTPD WARNING: average response time %.0f
+        milliseconds\n", $average;
+        exit $ERRORS{"WARNING"};
+     }
+     if($average>0) {
+        printf "HTTPD ok: average response time %.0f milliseconds\n",
+        $average;
+        exit $ERRORS{"OK"};
+     }
+     print "Unknown Status\n";
+     exit $ERRORS{"UNKNOWN"};
+  }
+} else {
+        print "HTTP request failed\n";
+        exit $ERRORS{"CRITICAL"};
+}
+
+
+#
+#              ok, now we are almost through
+#              These last subroutines do the things for those that do not
+#              read source code.
+#
+sub print_usage () {
+        print "Usage: $0 -H <host> [-lhV] [-w <warn>] [-c <crit>] [-u <url>]\n"; }
+ 
+sub print_help () {
+        print "\n";
+        print "\n";
+        print "check_apache nagios plugin version $version\n";
+        print "\n";
+        print "The nagios plugins come with ABSOLUTELY NO WARRANTY.  You may redistribute\n";
+        print "copies of the plugins under the terms of the GNU General Public License.\n";
+        print "For more information about these matters, see the file named COPYING.\n";
+        print "\n";
+        print "Copyright (c) 2001 Sebastian Hetze  Linux Information Systems AG\n";
+        print "\n";
+        print "\n";
+        print "This plugin checks the apache HTTP service on the specified host.\n";
+        print "It uses the mod_status facilities provided by the apache server.\n";
+        print "The monitoring server must be authorized in httpd.conf.\n";
+        print "\n";
+        print "\n";
+        print_usage();
+        print "\n";
+        print "Options:\n";
+        print " -H, --hostname=ADDRESS\n";
+        print "     host name argument for server.\n";
+        print " -l, --load\n";
+        print "     check load instead of performance.\n";
+        print " -h, --help\n";
+        print "     print detailed help screen.\n";
+        print " -V, --version\n";
+        print "     print version information.\n";
+        print " -w, --warning=INTEGER\n";
+        print "     load / performance level at which a warning message will be gererated.\n";
+        print " -c, --critical=INTEGER\n";
+        print "     load / performance level at which a critical message will be gererated.\n";
+        print " -u, --url=PATH\n";
+        print "     location to call mod_status.\n";
+        print "\n";
+        print "     Defaults for performance checking are $perf_w/$perf_c msec.\n";
+        print "     Defaults for load checking are $load_w/$load_c servers running.\n";
+        print "\n";
+        print "\n";
+} 
+#
+#              the end
+#