|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
#!/usr/bin/perl
#
# check_memory - Check free(1) data against given tresholds
#
# Copyright (C) 2007 Thomas Guyot-Sionnest <tguyot@gmail.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; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
|
|
|
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
use strict;
use warnings;
use vars qw($PROGNAME $VERSION $FREECMD $UNIT);
use Nagios::Plugin;
$PROGNAME = "check_memory";
$VERSION = '1.0.1';
$FREECMD = '/usr/bin/free';
$UNIT = 'M';
my $np = Nagios::Plugin->new(
usage => "Usage: %s [ -w <warning_threshold> ] [ -c <critical_threshold> ]\n"
. ' [ -u <unit> ]',
version => $VERSION,
plugin => $PROGNAME,
blurb => 'Check free(1) data against given tresholds',
timeout => 30,
);
$np->add_arg(
spec => 'warning|w=s',
help => "-w, --warning=THRESHOLD[%]\n"
. " Warning threshold (in bytes or percent) for free memory. See\n"
. " http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT\n"
. " for the threshold format. Alternatively this can be defined as a percentage\n"
. ' of minimum free memory (warning and critical must be in the same format).',
required => 0,
);
$np->add_arg(
spec => 'critical|c=s',
help => "-c, --critical=THRESHOLD[%]\n"
. " Critical threshold (in bytes or percent) for free memory. See\n"
. " http://nagiosplug.sourceforge.net/developer-guidelines.html#THRESHOLDFORMAT\n"
. " for the threshold format. Alternatively this can be defined as a percentage\n"
. ' of minimum free memory (warning and critical must be in the same format).',
required => 0,
);
$np->add_arg(
spec => 'unit|u=s',
help => "-u, --unit=UNIT\n"
. " Unit to use for human-redeable output. Can be 'b', 'K' 'M' or 'G' for\n"
. " bytes, KiB, MiB or GiB respectively (default: '$UNIT').",
default => $UNIT,
required => 0,
);
$np->getopts;
# Assign, then check args
my $multiple;
my $unit = $np->opts->unit;
if ($unit eq 'M') {
$multiple = 1024 * 1024;
} elsif ( $unit eq 'K') {
$multiple = 1024;
} elsif ( $unit eq 'b') {
$multiple = 1;
} elsif ( $unit eq 'G') {
$multiple = 1024 * 1024 * 1024;
} else {
$np->nagios_exit('UNKNOWN', "Unit must be one of 'b', 'K', 'M' or 'G', case-sensitive.");
}
my $verbose = $np->opts->verbose;
# Would better fit later but doing it here validates thresholds
my $warning = $np->opts->warning;
my $critical = $np->opts->critical;
$np->set_thresholds(
warning => ((defined($warning) && $warning !~ /^\d+%$/) ? $warning : undef),
critical => ((defined($critical) && $critical !~ /^\d+%$/) ? $critical : undef),
);
# Better safe than sorry
alarm $np->opts->timeout;
# We always get bytes, then calculate units ourselves
warn("Running: '$FREECMD -b'\n") if ($verbose);
open(RESULT, "$FREECMD -b |")
or $np->nagios_exit('CRITICAL', "Could not run $FREECMD");
warn("Output from $FREECMD:\n") if ($verbose > 1);
my ($used, $free);
while (<RESULT>) {
warn(" $_") if ($verbose > 1);
|
|
|
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
}
close(RESULT);
alarm(0);
$np->nagios_exit('CRITICAL', "Unable to interpret $FREECMD output") if (!defined($free));
my $total = $used + $free;
if (defined($warning) && $warning =~ /^\d+%$/) {
if ($warning) {
$warning =~ s/%//;
$warning = $total / 100 * $warning;
$warning .= ':';
}
warn("Calculated threshold (from percentage): warn=>$warning\n") if ($verbose);
}
if (defined($critical) && $critical =~ /^\d+%$/) {
if ($critical) {
$critical =~ s/%//;
$critical = $total / 100 * $critical;
$critical .= ':';
}
warn("Calculated threshold (from percentage): crit=>$critical\n") if ($verbose);
}
$np->set_thresholds(
warning => $warning,
critical => $critical,
);
$np->add_perfdata(
label => "free",
value => $free,
uom => 'b',
threshold => $np->threshold,
);
my $freeprint = int($free/$multiple);
$np->nagios_exit($np->check_threshold($free), "$freeprint$unit free");
|
