summaryrefslogtreecommitdiffstats
path: root/Monitoring/nagios/plugins/check_mem.pl
diff options
context:
space:
mode:
Diffstat (limited to 'Monitoring/nagios/plugins/check_mem.pl')
-rwxr-xr-xMonitoring/nagios/plugins/check_mem.pl263
1 files changed, 263 insertions, 0 deletions
diff --git a/Monitoring/nagios/plugins/check_mem.pl b/Monitoring/nagios/plugins/check_mem.pl
new file mode 100755
index 00000000..99e2b1f7
--- /dev/null
+++ b/Monitoring/nagios/plugins/check_mem.pl
@@ -0,0 +1,263 @@
+#!/usr/bin/perl -w
+# $Id: check_mem.pl 2 2002-02-28 06:42:51Z egalstad $
+
+# Original script stolen from:
+# check_mem.pl Copyright (C) 2000 Dan Larsson <dl@tyfon.net>
+# hacked by
+# Justin Ellison <justin@techadvise.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
+
+# Tell Perl what we need to use
+use strict;
+use Getopt::Std;
+
+#TODO - Convert to Nagios::Plugin
+#TODO - Use an alarm
+
+# Predefined exit codes for Nagios
+use vars qw($opt_c $opt_f $opt_u $opt_w $opt_C $opt_v %exit_codes);
+%exit_codes = ('UNKNOWN' ,-1,
+ 'OK' , 0,
+ 'WARNING' , 1,
+ 'CRITICAL', 2,
+ );
+
+# Get our variables, do our checking:
+init();
+
+# Get the numbers:
+my ($free_memory_kb,$used_memory_kb,$caches_kb) = get_memory_info();
+print "$free_memory_kb Free\n$used_memory_kb Used\n$caches_kb Cache\n" if ($opt_v);
+
+if ($opt_C) { #Do we count caches as free?
+ $used_memory_kb -= $caches_kb;
+ $free_memory_kb += $caches_kb;
+}
+
+# Round to the nearest KB
+$free_memory_kb = sprintf('%d',$free_memory_kb);
+$used_memory_kb = sprintf('%d',$used_memory_kb);
+$caches_kb = sprintf('%d',$caches_kb);
+
+# Tell Nagios what we came up with
+tell_nagios($used_memory_kb,$free_memory_kb,$caches_kb);
+
+
+sub tell_nagios {
+ my ($used,$free,$caches) = @_;
+
+ # Calculate Total Memory
+ my $total = $free + $used;
+ print "$total Total\n" if ($opt_v);
+
+ my $perfdata = "|TOTAL=${total}KB;;;; USED=${used}KB;;;; FREE=${free}KB;;;; CACHES=${caches}KB;;;;";
+
+ if ($opt_f) {
+ my $percent = sprintf "%.1f", ($free / $total * 100);
+ if ($percent <= $opt_c) {
+ finish("CRITICAL - $percent% ($free kB) free!$perfdata",$exit_codes{'CRITICAL'});
+ }
+ elsif ($percent <= $opt_w) {
+ finish("WARNING - $percent% ($free kB) free!$perfdata",$exit_codes{'WARNING'});
+ }
+ else {
+ finish("OK - $percent% ($free kB) free.$perfdata",$exit_codes{'OK'});
+ }
+ }
+ elsif ($opt_u) {
+ my $percent = sprintf "%.1f", ($used / $total * 100);
+ if ($percent >= $opt_c) {
+ finish("CRITICAL - $percent% ($used kB) used!$perfdata",$exit_codes{'CRITICAL'});
+ }
+ elsif ($percent >= $opt_w) {
+ finish("WARNING - $percent% ($used kB) used!$perfdata",$exit_codes{'WARNING'});
+ }
+ else {
+ finish("OK - $percent% ($used kB) used.$perfdata",$exit_codes{'OK'});
+ }
+ }
+}
+
+# Show usage
+sub usage() {
+ print "\ncheck_mem.pl v1.0 - Nagios Plugin\n\n";
+ print "usage:\n";
+ print " check_mem.pl -<f|u> -w <warnlevel> -c <critlevel>\n\n";
+ print "options:\n";
+ print " -f Check FREE memory\n";
+ print " -u Check USED memory\n";
+ print " -C Count OS caches as FREE memory\n";
+ print " -w PERCENT Percent free/used when to warn\n";
+ print " -c PERCENT Percent free/used when critical\n";
+ print "\nCopyright (C) 2000 Dan Larsson <dl\@tyfon.net>\n";
+ print "check_mem.pl comes with absolutely NO WARRANTY either implied or explicit\n";
+ print "This program is licensed under the terms of the\n";
+ print "GNU General Public License (check source code for details)\n";
+ exit $exit_codes{'UNKNOWN'};
+}
+
+sub get_memory_info {
+ my $used_memory_kb = 0;
+ my $free_memory_kb = 0;
+ my $total_memory_kb = 0;
+ my $caches_kb = 0;
+
+ my $uname;
+ if ( -e '/usr/bin/uname') {
+ $uname = `/usr/bin/uname -a`;
+ }
+ elsif ( -e '/bin/uname') {
+ $uname = `/bin/uname -a`;
+ }
+ else {
+ die "Unable to find uname in /usr/bin or /bin!\n";
+ }
+ print "uname returns $uname" if ($opt_v);
+ if ( $uname =~ /Linux/ ) {
+ my @meminfo = `/bin/cat /proc/meminfo`;
+ foreach (@meminfo) {
+ chomp;
+ if (/^Mem(Total|Free):\s+(\d+) kB/) {
+ my $counter_name = $1;
+ if ($counter_name eq 'Free') {
+ $free_memory_kb = $2;
+ }
+ elsif ($counter_name eq 'Total') {
+ $total_memory_kb = $2;
+ }
+ }
+ elsif (/^(Buffers|Cached):\s+(\d+) kB/) {
+ $caches_kb += $2;
+ }
+ }
+ $used_memory_kb = $total_memory_kb - $free_memory_kb;
+ }
+ elsif ( $uname =~ /SunOS/ ) {
+ eval "use Sun::Solaris::Kstat";
+ if ($@) { #Kstat not available
+ if ($opt_C) {
+ print "You can't report on Solaris caches without Sun::Solaris::Kstat available!\n";
+ exit $exit_codes{UNKNOWN};
+ }
+ my @vmstat = `/usr/bin/vmstat 1 2`;
+ my $line;
+ foreach (@vmstat) {
+ chomp;
+ $line = $_;
+ }
+ $free_memory_kb = (split(/ /,$line))[5] / 1024;
+ my @prtconf = `/usr/sbin/prtconf`;
+ foreach (@prtconf) {
+ if (/^Memory size: (\d+) Megabytes/) {
+ $total_memory_kb = $1 * 1024;
+ }
+ }
+ $used_memory_kb = $total_memory_kb - $free_memory_kb;
+
+ }
+ else { # We have kstat
+ my $kstat = Sun::Solaris::Kstat->new();
+ my $phys_pages = ${kstat}->{unix}->{0}->{system_pages}->{physmem};
+ my $free_pages = ${kstat}->{unix}->{0}->{system_pages}->{freemem};
+ # We probably should account for UFS caching here, but it's unclear
+ # to me how to determine UFS's cache size. There's inode_cache,
+ # and maybe the physmem variable in the system_pages module??
+ # In the real world, it looks to be so small as not to really matter,
+ # so we don't grab it. If someone can give me code that does this,
+ # I'd be glad to put it in.
+ my $arc_size = (exists ${kstat}->{zfs} && ${kstat}->{zfs}->{0}->{arcstats}->{size}) ?
+ ${kstat}->{zfs}->{0}->{arcstats}->{size} / 1024
+ : 0;
+ $caches_kb += $arc_size;
+ my $pagesize = `pagesize`;
+
+ $total_memory_kb = $phys_pages * $pagesize / 1024;
+ $free_memory_kb = $free_pages * $pagesize / 1024;
+ $used_memory_kb = $total_memory_kb - $free_memory_kb;
+ }
+ }
+ elsif ( $uname =~ /AIX/ ) {
+ my @meminfo = `/usr/bin/vmstat -v`;
+ foreach (@meminfo) {
+ chomp;
+ if (/^\s*([0-9.]+)\s+(.*)/) {
+ my $counter_name = $2;
+ if ($counter_name eq 'memory pages') {
+ $total_memory_kb = $1*4;
+ }
+ if ($counter_name eq 'free pages') {
+ $free_memory_kb = $1*4;
+ }
+ if ($counter_name eq 'file pages') {
+ $caches_kb = $1*4;
+ }
+ }
+ }
+ $used_memory_kb = $total_memory_kb - $free_memory_kb;
+ }
+ else {
+ if ($opt_C) {
+ print "You can't report on $uname caches!\n";
+ exit $exit_codes{UNKNOWN};
+ }
+ my $command_line = `vmstat | tail -1 | awk '{print \$4,\$5}'`;
+ chomp $command_line;
+ my @memlist = split(/ /, $command_line);
+
+ # Define the calculating scalars
+ $used_memory_kb = $memlist[0]/1024;
+ $free_memory_kb = $memlist[1]/1024;
+ $total_memory_kb = $used_memory_kb + $free_memory_kb;
+ }
+ return ($free_memory_kb,$used_memory_kb,$caches_kb);
+}
+
+sub init {
+ # Get the options
+ if ($#ARGV le 0) {
+ &usage;
+ }
+ else {
+ getopts('c:fuCvw:');
+ }
+
+ # Shortcircuit the switches
+ if (!$opt_w or $opt_w == 0 or !$opt_c or $opt_c == 0) {
+ print "*** You must define WARN and CRITICAL levels!\n";
+ &usage;
+ }
+ elsif (!$opt_f and !$opt_u) {
+ print "*** You must select to monitor either USED or FREE memory!\n";
+ &usage;
+ }
+
+ # Check if levels are sane
+ if ($opt_w <= $opt_c and $opt_f) {
+ print "*** WARN level must not be less than CRITICAL when checking FREE memory!\n";
+ &usage;
+ }
+ elsif ($opt_w >= $opt_c and $opt_u) {
+ print "*** WARN level must not be greater than CRITICAL when checking USED memory!\n";
+ &usage;
+ }
+}
+
+sub finish {
+ my ($msg,$state) = @_;
+ print "$msg\n";
+ exit $state;
+}