1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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
112
113
114
115
116
117
118
119
120
121
122
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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
#!/usr/local/bin/perl
# author: Al Tobey <albert.tobey@priority-health.com>
# what: monitor diskspace using the host-resources mib
# license: GPL - http://www.fsf.org/licenses/gpl.txt
#
# Todo:
use strict;
require 5.6.0;
use lib qw( /opt/nagios/libexec );
use utils qw(%ERRORS $TIMEOUT &print_revision &support &usage);
use SNMP 5.0;
use Getopt::Long;
use vars qw( $exit $message $opt_version $opt_timeout $opt_help $opt_command $opt_host $opt_community $opt_verbose $opt_warning $opt_critical $opt_port $opt_mountpoint $opt_stats $snmp_session $PROGNAME $TIMEOUT %mounts );
$PROGNAME = "snmp_disk_monitor.pl";
$opt_verbose = undef;
$opt_host = undef;
$opt_community = 'public';
$opt_command = undef;
$opt_warning = 99;
$opt_critical = 100;
$opt_port = 161;
$opt_stats = undef;
$message = undef;
$exit = 'OK';
%mounts = ();
sub process_options {
my( $opt_crit, $opt_warn ) = ();
Getopt::Long::Configure( 'bundling' );
GetOptions(
'V' => \$opt_version, 'version' => \$opt_version,
'v' => \$opt_verbose, 'verbose' => \$opt_verbose,
'h' => \$opt_help, 'help' => \$opt_help,
's' => \$opt_stats, 'statistics' => \$opt_stats,
'H:s' => \$opt_host, 'hostname:s' => \$opt_host,
'p:i' => \$opt_port, 'port:i' => \$opt_port,
'C:s' => \$opt_community, 'community:s' => \$opt_community,
'c:i' => \$opt_crit, 'critical:i' => \$opt_crit,
'w:i' => \$opt_warn, 'warning:i' => \$opt_warn,
't:i' => \$TIMEOUT, 'timeout:i' => \$TIMEOUT,
'm:s' => \$opt_mountpoint, 'mountpoint:s'=> \$opt_mountpoint
);
if ( defined($opt_version) ) { local_print_revision(); }
if ( defined($opt_verbose) ) { $SNMP::debugging = 1; }
if ( !defined($opt_host) || defined($opt_help) || !defined($opt_mountpoint) ) {
print_help();
exit $ERRORS{UNKNOWN};
}
$opt_mountpoint = [ split(/,/, $opt_mountpoint) ];
}
sub local_print_revision {
print_revision( $PROGNAME, '$Revision: 82 $ ' )
}
sub print_usage {
print "Usage: $PROGNAME -H <host> -C <snmp_community> [-s] [-w <low>,<high>] [-c <low>,<high>] [-t <timeout>] -m <mountpoint>\n";
}
sub print_help {
local_print_revision();
print "Copyright (c) 2002 Al Tobey <albert.tobey\@priority-health.com>\n\n",
"SNMP Disk Monitor plugin for Nagios\n\n";
print_usage();
print <<EOT;
-v, --verbose
print extra debugging information
-h, --help
print this help message
-H, --hostname=HOST
name or IP address of host to check
-C, --community=COMMUNITY NAME
community name for the host's SNMP agent
-m, --mountpoint=MOUNTPOINT
a mountpoint, or a comma delimited list of mountpoints
-w, --warning=INTEGER
percent of disk used to generate WARNING state (Default: 99)
-c, --critical=INTEGER
percent of disk used to generate CRITICAL state (Default: 100)
-s, --statistics
output statistics in Nagios format
EOT
}
sub verbose (@) {
return if ( !defined($opt_verbose) );
print @_;
}
sub check_for_errors {
if ( $snmp_session->{ErrorNum} ) {
print "UNKNOWN - error retrieving SNMP data: $snmp_session->{ErrorStr}\n";
exit $ERRORS{UNKNOWN};
}
}
# =========================================================================== #
# =====> MAIN
# =========================================================================== #
process_options();
alarm( $TIMEOUT ); # make sure we don't hang Nagios
$snmp_session = new SNMP::Session(
DestHost => $opt_host,
Community => $opt_community,
RemotePort => $opt_port,
Version => '2c'
);
# retrieve the data from the remote host
my( $mps, $alloc, $size, $used ) = $snmp_session->bulkwalk( 0, 4, [['hrStorageDescr'],['hrStorageAllocationUnits'],['hrStorageSize'],['hrStorageUsed']] );
check_for_errors();
alarm( 0 ); # all done with the network connection
# move all the data into a nice, convenient hash for processing
foreach my $mp ( @$mps ) { $mounts{$mp->iid}->{mountpoint} = $mp->val; }
foreach my $a ( @$alloc ) { $mounts{$a->iid}->{alloc_units} = $a->val; }
foreach my $si ( @$size ) {
if ( exists($mounts{$si->iid}->{alloc_units}) ) {
$mounts{$si->iid}->{size} = $si->val * $mounts{$si->iid}->{alloc_units};
}
else {
$mounts{$si->iid}->{size} = $si->val;
}
}
foreach my $us ( @$used ) {
if ( exists($mounts{$us->iid}->{alloc_units}) ) {
$mounts{$us->iid}->{used} = $us->val * $mounts{$us->iid}->{alloc_units};
}
else {
$mounts{$us->iid}->{used} = $us->val;
}
}
# now find the mountpoint or mountpoints that were actually requested and push onto an array for output
my @matches = ();
foreach my $mp ( @$opt_mountpoint ) {
my $found = scalar(@matches); # count all matches
foreach my $key ( keys(%mounts) ) {
if ( $mounts{$key}->{mountpoint} eq $mp ) {
# find the percentate - eval to avoid divide by zero errors
eval { $mounts{$key}->{percent_used} = $mounts{$key}->{used} / $mounts{$key}->{size} };
$mounts{$key}->{percent_used} =~ s/^0\.([0-9]{1,2})([0-9]?).*/\1/; # truncate
if ( $2 >= 5 ) { $mounts{$key}->{percent_used}++ }; # round the number number
verbose "mountpoint $mp has ", $mounts{$key}->{percent_used}, "% used, ",
$mounts{$key}->{size}, " bytes and ",$mounts{$key}->{used}, " used\n";
push( @matches, $mounts{$key} );
}
}
if ( scalar(@matches) == $found ) {
print "UNKNOWN - could not locate mountpoint $mp on host\n";
exit $ERRORS{UNKNOWN};
}
}
# now run through and check the thresholds
foreach my $mp ( @matches ) {
if ( $mp->{percent_used} >= $opt_warning ) {
$exit = 'WARNING';
if ( $mp->{percent_used} >= $opt_critical ) { $exit = 'CRITICAL'; }
}
$message .= $mp->{percent_used}.'% used on '.$mp->{mountpoint}.', ';
}
$message =~ s/,\s*$//;
# append statistics if requested
if ( defined($opt_stats) ) {
my @tmp = ();
foreach my $mp ( @matches ) {
push( @tmp, join(',',$mp->{mountpoint},$mp->{size},$mp->{used}) );
}
$message .= '|'.join( ':', @tmp );
}
print "Disk $exit - $message\n";
exit $ERRORS{$exit};
|