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authorSven Nierlein <sven@nierlein.org>2018-07-26 05:31:37 (GMT)
committerGitHub <noreply@github.com>2018-07-26 05:31:37 (GMT)
commit22f13aa2f19e1eb97f1a7feea248b3d25b038d92 (patch)
tree326dc798e9c9b6dc60f5862e1e6fee34e7603875 /plugins-scripts/check_uptime.pl
parent9661ee74885834f7b69ab0874c4e65bed0b871c9 (diff)
parent6a8564fb44ab6914dcc8ec63e8af6477803da080 (diff)
downloadmonitoring-plugins-22f13aa2f19e1eb97f1a7feea248b3d25b038d92.tar.gz
Merge pull request #1538 from wopfel/uptime-plugin
Uptime plugin
Diffstat (limited to 'plugins-scripts/check_uptime.pl')
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diff --git a/plugins-scripts/check_uptime.pl b/plugins-scripts/check_uptime.pl
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1#!@PERL@ -w
2
3# check_uptime - check uptime to see how long the system is running.
4#
5
6# License Information:
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
20# USA
21#
22############################################################################
23
24use POSIX;
25use strict;
26use Getopt::Long;
27use vars qw($opt_V $opt_h $opt_v $verbose $PROGNAME $opt_w $opt_c
28 $opt_f $opt_s
29 $lower_warn_threshold $upper_warn_threshold
30 $lower_crit_threshold $upper_crit_threshold
31 $status $state $msg);
32use FindBin;
33use lib "$FindBin::Bin";
34use utils qw(%ERRORS &print_revision &support &usage );
35
36sub print_help ();
37sub print_usage ();
38sub process_arguments ();
39
40$ENV{'PATH'}='@TRUSTED_PATH@';
41$ENV{'BASH_ENV'}='';
42$ENV{'ENV'}='';
43$PROGNAME = "check_uptime";
44$state = $ERRORS{'UNKNOWN'};
45
46my $uptime_file = "/proc/uptime";
47
48
49# Process arguments
50
51Getopt::Long::Configure('bundling');
52$status = process_arguments();
53if ($status){
54 print "ERROR: processing arguments\n";
55 exit $ERRORS{"UNKNOWN"};
56}
57
58
59# Get uptime info from file
60
61if ( ! -r $uptime_file ) {
62 print "ERROR: file '$uptime_file' is not readable\n";
63 exit $ERRORS{"UNKNOWN"};
64}
65
66if ( ! open FILE, "<", $uptime_file ) {
67 print "ERROR: cannot read from file '$uptime_file'\n";
68 exit $ERRORS{"UNKNOWN"};
69}
70
71chomp( my $file_content = <FILE> );
72close FILE;
73
74print "$uptime_file: $file_content\n" if $verbose;
75
76# Get first digit value (without fraction)
77my ( $uptime_seconds ) = $file_content =~ /^([\d]+)/;
78
79# Bail out if value is not numeric
80if ( $uptime_seconds !~ /^\d+$/ ) {
81 print "ERROR: no numeric value: $uptime_seconds\n";
82 exit $ERRORS{"UNKNOWN"};
83}
84
85
86# Do calculations for a "pretty" format (2 weeks, 5 days, ...)
87
88my ( $secs, $mins, $hours, $days, $weeks );
89$secs = $uptime_seconds;
90$mins = $hours = $days = $weeks = 0;
91if ( $secs > 100 ) {
92 $mins = int( $secs / 60 );
93 $secs -= $mins * 60;
94}
95if ( $mins > 100 ) {
96 $hours = int( $mins / 60 );
97 $mins -= $hours * 60;
98}
99if ( $hours > 48 ) {
100 $days = int( $hours / 24 );
101 $hours -= $days * 24;
102}
103if ( $days > 14 ) {
104 $weeks = int( $days / 7 );
105 $days -= $weeks * 7;
106}
107
108my $pretty_uptime = "";
109$pretty_uptime .= sprintf( "%d week%s, ", $weeks, $weeks == 1 ? "" : "s" ) if $weeks;
110$pretty_uptime .= sprintf( "%d day%s, ", $days, $days == 1 ? "" : "s" ) if $days;
111$pretty_uptime .= sprintf( "%d hour%s, ", $hours, $hours == 1 ? "" : "s" ) if $hours;
112$pretty_uptime .= sprintf( "%d minute%s, ", $mins, $mins == 1 ? "" : "s" ) if $mins;
113# Replace last occurence of comma with "and"
114$pretty_uptime =~ s/, $/ and /;
115# Always print the seconds (though it may be 0 seconds)
116$pretty_uptime .= sprintf( "%d second%s", $secs, $secs == 1 ? "" : "s" );
117
118
119# Default to catch errors in program
120my $state_str = "UNKNOWN";
121
122# Check values
123my $out_of_bounds_text = "";
124if ( $uptime_seconds > $upper_crit_threshold ) {
125 $state_str = "CRITICAL";
126 $out_of_bounds_text = "upper crit";
127} elsif ( $uptime_seconds < $lower_crit_threshold ) {
128 $state_str = "CRITICAL";
129 $out_of_bounds_text = "lower crit";
130} elsif ( $uptime_seconds > $upper_warn_threshold ) {
131 $state_str = "WARNING";
132 $out_of_bounds_text = "upper warn";
133} elsif ( $uptime_seconds < $lower_warn_threshold ) {
134 $state_str = "WARNING";
135 $out_of_bounds_text = "lower warn";
136} else {
137 $state_str = "OK";
138}
139
140$msg = "$state_str: ";
141
142$msg .= "uptime is $uptime_seconds seconds. ";
143$msg .= "Exceeds $out_of_bounds_text threshold. " if $out_of_bounds_text;
144$msg .= "Running for $pretty_uptime. " if $opt_f;
145if ( $opt_s ) {
146 my $up_since = strftime( "%Y-%m-%d %H:%M:%S", localtime( time - $uptime_seconds ) );
147 $msg .= "Running since $up_since. ";
148}
149
150$state = $ERRORS{$state_str};
151
152# Perfdata support
153print "$msg|uptime=${uptime_seconds}s;$upper_warn_threshold;$upper_crit_threshold;0\n";
154exit $state;
155
156
157#####################################
158#### subs
159
160
161sub process_arguments(){
162 GetOptions
163 ("V" => \$opt_V, "version" => \$opt_V,
164 "v" => \$opt_v, "verbose" => \$opt_v,
165 "h" => \$opt_h, "help" => \$opt_h,
166 "w=s" => \$opt_w, "warning=s" => \$opt_w, # warning if above this number
167 "c=s" => \$opt_c, "critical=s" => \$opt_c, # critical if above this number
168 "f" => \$opt_f, "for" => \$opt_f, # show "running for ..."
169 "s" => \$opt_s, "since" => \$opt_s, # show "running since ..."
170 );
171
172 if ($opt_V) {
173 print_revision($PROGNAME,'@NP_VERSION@');
174 exit $ERRORS{'UNKNOWN'};
175 }
176
177 if ($opt_h) {
178 print_help();
179 exit $ERRORS{'UNKNOWN'};
180 }
181
182 if (defined $opt_v) {
183 $verbose = $opt_v;
184 }
185
186 unless ( defined $opt_w && defined $opt_c ) {
187 print_usage();
188 exit $ERRORS{'UNKNOWN'};
189 }
190
191 # Check if a range was supplied ("lowvalue:highvalue") for warning and critical
192 # Otherwise, set 0 as the lower threshold and the parameter value as upper threshold
193 # (the uptime should always be positive, so there should be no issue)
194 if ( $opt_w =~ /^(.+):(.+)$/ ) {
195 $lower_warn_threshold = $1;
196 $upper_warn_threshold = $2;
197 } else {
198 $lower_warn_threshold = 0;
199 $upper_warn_threshold = $opt_w;
200 }
201 if ( $opt_c =~ /^(.+):(.+)$/ ) {
202 $lower_crit_threshold = $1;
203 $upper_crit_threshold = $2;
204 } else {
205 $lower_crit_threshold = 0;
206 $upper_crit_threshold = $opt_c;
207 }
208
209 # Set as seconds (calculate if suffix present)
210 $lower_warn_threshold = calc_as_seconds( $lower_warn_threshold );
211 $lower_crit_threshold = calc_as_seconds( $lower_crit_threshold );
212 $upper_warn_threshold = calc_as_seconds( $upper_warn_threshold );
213 $upper_crit_threshold = calc_as_seconds( $upper_crit_threshold );
214
215 # Check for numeric value of warning parameter
216 if ( $lower_warn_threshold !~ /^\d+$/ ) {
217 print "Lower warning (-w) is not numeric\n";
218 exit $ERRORS{'UNKNOWN'};
219 }
220 if ( $upper_warn_threshold !~ /^\d+$/ ) {
221 print "Upper warning (-w) is not numeric\n";
222 exit $ERRORS{'UNKNOWN'};
223 }
224 # Check for numeric value of critical parameter
225 if ( $lower_crit_threshold !~ /^\d+$/ ) {
226 print "Lower critical (-c) is not numeric\n";
227 exit $ERRORS{'UNKNOWN'};
228 }
229 if ( $upper_crit_threshold !~ /^\d+$/ ) {
230 print "Upper critical (-c) is not numeric\n";
231 exit $ERRORS{'UNKNOWN'};
232 }
233
234 # Check boundaries
235 if ( $upper_warn_threshold >= $upper_crit_threshold ) {
236 print "Upper Warning (-w) cannot be greater than Critical (-c)!\n";
237 exit $ERRORS{'UNKNOWN'};
238 }
239 # No "<=" since both values are zero if no range (only upper threshold values) is given
240 if ( $lower_warn_threshold < $lower_crit_threshold ) {
241 print "Lower Warning (-w) cannot be less than Critical (-c)!\n";
242 exit $ERRORS{'UNKNOWN'};
243 }
244
245 return $ERRORS{'OK'};
246}
247
248sub print_usage () {
249 print "Usage: $PROGNAME -w <warn> -c <crit> [-v]\n";
250}
251
252sub print_help () {
253 print_revision($PROGNAME,'@NP_VERSION@');
254 print "Copyright (c) 2002 Subhendu Ghosh/Carlos Canau/Benjamin Schmid\n";
255 print "Copyright (c) 2018 Bernd Arnold\n";
256 print "\n";
257 print_usage();
258 print "\n";
259 print " Checks the uptime of the system using $uptime_file\n";
260 print "\n";
261 print "-w (--warning) = Min. number of uptime to generate warning\n";
262 print "-c (--critical) = Min. number of uptime to generate critical alert ( w < c )\n";
263 print "-f (--for) = Show uptime in a pretty format (Running for x weeks, x days, ...)\n";
264 print "-s (--since) = Show last boot in yyyy-mm-dd HH:MM:SS format (output from 'uptime -s')\n";
265 print "-h (--help)\n";
266 print "-V (--version)\n";
267 print "-v (--verbose) = debugging output\n";
268 print "\n\n";
269 print "Note: -w and -c are required arguments.\n";
270 print " You can suffix both values with s for seconds (default), m (minutes), h (hours), d (days) or w (weeks).\n";
271 print "\n";
272 print "Range support: You may specify a range for both warning and critical thresholds.\n";
273 print " This works without additional Perl modules.\n";
274 print "Example: ./check_uptime -w 10m:4w -c 1m:8w\n";
275 print " Results in a critical state when uptime is below 60 seconds or higher than 8 weeks,\n";
276 print " and in a warning state when uptime is below 10 minutes or above 4 weeks.\n";
277 print "\n\n";
278 support();
279}
280
281sub calc_as_seconds () {
282
283 my $parameter = shift;
284
285 # Check if suffix is present
286 # Calculate parameter to seconds (to get an integer value finally)
287 # If no suffix is present, just return the value
288
289 # Possible suffixes:
290 # s = seconds
291 # m = minutes
292 # h = hours
293 # d = days
294 # w = weeks
295 my %factor = ( "s" => 1,
296 "m" => 60,
297 "h" => 60 * 60,
298 "d" => 60 * 60 * 24,
299 "w" => 60 * 60 * 24 * 7,
300 );
301
302 if ( $parameter =~ /^(\d+)([a-z])$/ ) {
303 my $value = $1;
304 my $suffix = $2;
305 print "detected: value=$value, suffix=$suffix\n" if $verbose;
306 if ( ! defined $factor{$suffix} ) {
307 print "Error: wrong suffix ($suffix) for value '$parameter'";
308 exit $ERRORS{'UNKNOWN'};
309 }
310 $parameter = $value * $factor{$suffix};
311 }
312
313 return $parameter;
314
315}